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# microstrip low pass filter system parameters by insertion loss method

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#### Varsha Gupta Performance Improvement of RMPA by Artificial meta-material structure

3944 руб.
This book presents a new design of compact microstrip antennas, where metamaterial are placed on structure substrate, have been proposed.The newly designed microstrip provide an optimized patch area resulting into a substantial reduction in size compared to a typical microstrip patch designed at the same frequency of operation.The antenna potential characteristics such as return loss,gain and bandwidth has been calculated for the proposed antenna system and measurement has been done by FS-315 spectrum analyzer and SWR Bridge.
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#### Nahid Sultan and Liton Chandra Paul Design and Analysis of a Rectangular Microstrip Patch Antenna

2890 руб.
Microstrip patch antennas are becoming increasingly useful because they can be printed directly onto a circuit board. Microstrip antennas are becoming very widespread within the mobile phone market. Patch antennas are low cost, have a low profile and are easily fabricated.The aim of this book is to clarify the design and Analysis process of a rectangular Microstrip Patch Antenna and study the effect of antenna dimensions Length (L), Width (W) and substrate parameters relative Dielectric constant, substrate thickness (t) on the Radiation parameters of Bandwidth and Beam-width.
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#### Gupta Varsha Performance Improvement of Rmpa by Artificial Meta-Material Structure

8777 руб.
This book presents a new design of compact microstrip antennas, where metamaterial are placed on structure substrate, have been proposed.The newly designed microstrip provide an optimized patch area resulting into a substantial reduction in size compared to a typical microstrip patch designed at the same frequency of operation.The antenna potential characteristics such as return loss,gain and bandwidth has been calculated for the proposed antenna system and measurement has been done by FS-315 spectrum analyzer and SWR Bridge.
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#### Raman K. Attri Narrow Band-Pass Filters for Low Frequency Applications. Evaluation of Eight Electronics Filter Design Topologies

1314 руб.
Narrow Band-pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping quality factor, gain and mid-frequency of the filter independent of each other. The critical applications require a design that ensures mid-frequency immune to the circuit component tolerances. It becomes increasingly difficult for low-frequency applications where the shift in few Hz in mid-frequency would cause desired frequencies to fall outside the filter's bandwidth and go undetected. The selection of right topology of the filter for the best performance is the key to successful design. This book objectively compares the relative performance of eight popular narrow band-pass filter topologies. The filter topologies are evaluated using a real-world practical example of designing an extremely narrow band-pass filter. The book provides guidelines for selecting the right topology for the low-frequency narrow band-pass filter.
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#### Ehtasham Mustafa Analytical Efficiency Evaluation of Modular Multilevel Converter (MMC) for High Voltage Direct Current System (HVDC)

5439 руб.
Master's Thesis from the year 2014 in the subject Electrotechnology, University of Peshawar (University of Engineering and Technology, Peshawar, Pakistan), course: High Voltage Direct Current, language: English, abstract: Modular Multilevel Converter (MMC) has become the most concerned converter topology in the High Voltage Direct Current (HVDC) transmission system, in recent times. The low switching frequency, low converter losses and flexible control made it most attractive topology. It is important to make a research on the loss calculation method of MMC and state formulae for the losses as it is a vital step during the design stage of the MMC based HVDC system. In this research work, the structure of MMC based HVDC system is discussed. Three sub module topologies'; half bridge, full bridge and clamp double sub module, are discussed. A method based on the average and root mean square (RMS) values of the current passing through the sub module is discussed. The conversion losses in the switching devices of the sub modules are calculated using the method. A cases study is taken into consideration then with certain parameters. Using these parameters a MATLAB program is developed. With the help of the program the losses and efficiency curves for each switching device by taking each sub module separately are obtained respectively. A comparison of the losses and efficiency of each sub module is also discussed. At the end those factors which effect the losses and efficienc...
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#### Tanvir Ishtaique ul Huque and Kamal Hosain Design and Simulation of Microstrip Array Antennas

3212 руб.
This research treatise shows the performance analysis of the microstrip antenna, based on the various parameters of it that are used to implement it and provides an optimization decision to get highly efficient microstrip antenna. In these paper different microstrip array antennas such as Series-feed, corporate-feed and series-corporate feed are analyzed and simulated. These antennas are designed on a thin substrate for the application of conformal microstrip array antenna. In all cases we get return losses in the range -4.21dB to -25.456 dB at resonance frequency. The gain of these antennas are simulated and found adequate results where side lobe label is maintained lower than main lobe. Operating frequency of these antennas is 10 GHz so these antennas are suitable for X-band application.
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#### Sathish Vimalraj Antony Jayasekar Low Power Digital Design using Asynchronous Logic

9064 руб.
The need for low power design is motivated by several factors, such as the emergence of portable systems, thermal considerations, reliability issues, and, most importantly, environmental concerns. Lots of power is wasted in an electronic device when the system is idle. This book introduces a new method of achieving low power by reducing the dependency of the clock signal in the design. It mainly focuses on obtaining low power by implementing asynchronous logic.
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3447 руб.
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4363.5 руб.
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3447 руб.
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#### Amro Shafik,Magdy Abdelhameed and Ahmed Kassem CMAC Based Motion Control of Electrohydraulic Servo Systems

4500 руб.
Automation based electrohydraulic servo systems have a wide range of applications in nowadays industrial systems. However, they still suffer from several nonlinearities like deadband in electrohydraulic valves, hysteresis, stick-slip friction in valves and cylinders. In addition, all hydraulic system parameters have uncertainties in their values due to the change of temperature while working. This book addresses these problems by designing a suitable intelligent control system that has the ability to deal with the system nonlinearities and parameters uncertainties by a fast and online learning algorithm.
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#### Ajay Singh Particle Swarm Optimization Approach for Distributed Generation Planning to Improve the Voltage Profile Margin

6227 руб.
Master's Thesis from the year 2017 in the subject Engineering - Mechanical Engineering, grade: 4.00, Kathmandu University (School of Engineering), course: Planning and Operation of Energy System, language: English, abstract: In power system, research area is widening and one is Distributed Generation (DG) integration in a distribution system. It restructures the power system and also helps in distribution system planning. This dissertation addresses the issue of voltage margin improvement by integrating DG unit and, therefore, this dissertation presents the model to enhance the candidate bus voltage of distribution system by optimal integration of DG units. The technical analysis is performed for radial distribution system (RDS).The proposed algorithm evaluates the base condition of loss and bus voltage and then generate populations of solutions at first stage. Optimization of DG unit size and locate the optimal bus can be done with the particle swarm optimization (PSO) method. The proposed paradigm works with the objective that minimize the active power loss under a constraint of voltage limit and DG size limit.Finally, the conclusion is that DG unit can locate optimally with optimized size to the distribution system for the voltage profile improvement of the buses and also the total loss of system is reduced. It is also concluded that the model can be used for any radial distribution systems.
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#### Ranjit Singh, Rohit Kumar, Sukhwinder Singh Jolly A computer-aided approach for gating system design for multi-cavity dies

6102 руб.
Master's Thesis from the year 2017 in the subject Engineering - Mechanical Engineering, grade: 8, , language: English, abstract: This work presents a system that would help in automatic design of multi-gates for multi-cavities dies. The system is able to automate: (i) the determination of the placement of gate, and (ii) determination of the shape of gate for die-casting parts having simple shapes. The system has to be implemented in GUI of MATLAB 7.10 using the best industry practices and recommendations from NADCA for gating-system design. The proposed system is able to generate parameters of multi-cavity gating-system for parts requiring multi-gates from the part model data. The other information required for working of the system includes material properties, die-casting process parameters and die-casting casting machine parameters which comes under the data initialization process. The parameters of the gating-system which are determined by the system are used for design of gating-system for the multi-cavity dies. This is done by updating the parameters of pre-modeled gating-system features stored as feature library. Chapter 3 , 4 and 5 present the various modules of the system along with its implementation on case-study parts. The results from the case-studies are quite encouraging and are in-line with the best industry practices. The present work describes a novel methodology for computer-aided automatic placement of the gating system for a die-casting part. it uses ...
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#### Maryasev Igor, Аxelrod Lev, Platonov Anton Two challenges to the system of periclase quality evaluation

3564 руб.
A novel objective method of digital analysis for microscopic examination of structural elements of fused periclase was developed. Main parameters are presented, which show the difference of the newly suggested method of investigation from the usual - linear one, in which examination is done with the help of chords. For comparison there are given results of measurements (done with the help of the old and the new method) of fused periclase crystal size, produced by Magnezit Group and by other manufacturers. Testing of fused periclase containing more than 97,5%MgO and various ratio of CaO/SiO2 in periclase - carbon refractories has not found influence of this parameter on the strength of refractories in steel - teeming ladles.
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#### Habib MD Habibur Rahman, Pathan MD Ilius Hasan, Rashid MD Harun-Or- Microstrip Patch Antenna

8789 руб.
This book presents the cost effective methods for designing a rectangular micro-strip patch antenna. In the recent years the development in communication system requires the development of low cost, minimal weight, low profile antennas that are capable of maintaining high performance over a wide spectrum of frequencies. This technological trend has focused much effort into the design of a rectangular micro-strip patch antenna. In this book, the performance in terms of directivity, radiation efficiency, return loss and radiation pattern of a rectangular micro-strip patch antenna have been analyzed and studied at 3 GHz.
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#### Teergele Jane, Danai Kourosh Selection of Outputs for Distributed Parameter Systems

6589 руб.
A method of sensor location selection is introduced for distributed parameter systems. In this method, the sensitivities of spatial outputs to model parameters are computed by a model and transformed via continuous wavelet transforms into the time-scale domain to characterize the shape attributes of output sensitivities and accentuate their diﬀerences. Regions are then sought in the time-scale plane wherein the wavelet coeﬃcient of an output-sensitivity surpasses all the others' as indication of the output sensitivity's uniqueness. This method yields a comprehensive account of identifiability each output provides for the model parameters as the basis of output selection. This output selection strategy is evaluated for a numerical case of pollutant dispersion by advection and discussion in a two-dimensional area.
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#### Lakshman Athukorala Microstrip bandpass filters

9814 руб.
New challenges are constantly faced in the development of RF and microwave filters, which have not only sustained but fuelled microwave filter research over the many years. These developments have encouraged new solutions for the realization of compact, low loss, highly selective RF and microwave filters. This text presents a novel distributed dual-mode resonator configuration which allows the realisation of tunable, highly compact microwave bandpass filters. Many interesting and attractive characteristics of the resonator are explored in detail. Application of this resonator in bandpass filter design is discussed with examples illustrating the design process with theoretical and experimental results to showcase filter performance. All-pole, generalised Chebyshev and dual-bandpass filters are shown to be easily developed with the novel resonator while achieveing a highly miniature footprint and a wide stopband. Finally, by employing a novel non-linear distortion enhancement technique readily applicable to this resonator, the design of highly linear tunable filter is discussed.
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#### Thomas Kaltenbacher Development of Ultra Low-Temperature Electronics

4419 руб.
This book presents the development of electronics for operation at cryogenic temperatures, with particular emphasis on the cryogenic electronics required for the Antimatter Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) experiment at the European Organisation for Nuclear Research (CERN). The research is focused on a highly sensitive charged particle detection system for a Penning trap, on cryogenic low-pass filters and on a low-loss DC-contact RF switch. The detection system consists of a high quality factor tuned circuit including a superconducting coil, and a low-noise amplifier. The developed electronics must reliably operate at 4.2K (-269ºC) and in high constant magnetic field of more than 1 Tesla. Therefore, the performance of the cryogenic electronic designs were carefully evaluated at low-temperature/high magnetic field, the result of which have important implications for the AEgIS experiment. Moreover, a new possibility of replacing the superconducting coil by a very high quality factor crystal resonator is presented and its possible application in experiments with charged, trapped particles is described.
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#### John Gunn Technique for Automation of Instantaneous Performance Optimization

9739 руб.
This thesis was completed and submitted to Drexel University in partial fulfillment of the requirements for the degree of Master of Mechanical Engineering. Many difficulties in metal machining arise from the precision required by the customer, as well as the exactness necessary for a successful cut to take place. This takes time, effort and money to adjust unique machine tool parameters by a trained professional. This thesis attempts to develop a method for analytically determining the causes for manufacturing process failure during the manufacturing process. It also applies control system theory to autonomously hone in on optimal parameters which would produce a desired end product. The thesis will present a MatLab® code format which could be used to optimize generic system parameters on any instantaneous system. It will be seen that utilizing these methods, it is possible to improve the quality of any final product.
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#### Jia-Sheng Hong Microstrip Filters for RF / Microwave Applications

13994.75 руб.
The first edition of “Microstrip Filters for RF/Microwave Applications” was published in 2001. Over the years the book has been well received and is used extensively in both academia and industry by microwave researchers and engineers. From its inception as a manuscript the book is almost 8 years old. While the fundamentals of filter circuits have not changed, further innovations in filter realizations and other applications have occurred with changes in the technology and use of new fabrication processes, such as the recent advances in RF MEMS and ferroelectric films for tunable filters; the use of liquid crystal polymer (LCP) substrates for multilayer circuits, as well as the new filters for dual-band, multi-band and ultra wideband (UWB) applications. Although the microstrip filter remains as the main transmission line medium for these new developments, there has been a new trend of using combined planar transmission line structures such as co-planar waveguide (CPW) and slotted ground structures for novel physical implementations beyond the single layer in order to achieve filter miniaturization and better performance. Also, over the years, practitioners have suggested topics that should be added for completeness, or deleted in some cases, as they were not very useful in practice. In view of the above, the authors are proposing a revised version of the “Microstrip Filters for RF/Microwave Applications” text and a slightly changed book title of “Planar Filters for RF/Microwave Applications” to reflect the aforementioned trends in the revised book.
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#### Terry Edwards C. Foundations for Microstrip Circuit Design

11620.18 руб.
Building on the success of the previous three editions, Foundations for Microstrip Circuit Design offers extensive new, updated and revised material based upon the latest research. Strongly design-oriented, this fourth edition provides the reader with a fundamental understanding of this fast expanding field making it a definitive source for professional engineers and researchers and an indispensable reference for senior students in electronic engineering. Topics new to this edition: microwave substrates, multilayer transmission line structures, modern EM tools and techniques, microstrip and planar transmision line design, transmission line theory, substrates for planar transmission lines, Vias, wirebonds, 3D integrated interposer structures, computer-aided design, microstrip and power-dependent effects, circuit models, microwave network analysis, microstrip passive elements, and slotline design fundamentals.
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#### Shivade Anand Multi-objective Optimization in WEDM of D3 Tool Steel

8177 руб.
This book contains study of wire electrical discharge machining of D3 tool steel. Influence of different process parameters are investigated for MRR, dimensional deviation, gap current and machining time, during intricate machining of D3 tool steel. Taguchi method is used for single characteristics optimization and to optimize all four process parameters simultaneously, Grey relational analysis (GRA) is employed along with Taguchi method. Through GRA, grey relational grade is used as a performance index to determine the optimal setting of process parameters for multi-objective characteristics. Confirmatory results, proves the potential of GRA to optimize process parameters successfully for multi-objective characteristics.
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#### Irfan Mamoona Light Propagation through Photonic Crystal Fiber

5077 руб.
Light Propagation through Photonic Crystal Fibers (PCF) is the main focus in this book. Nowadays Photonic Crystal Fibers are supposed to be new advancement in the field of optical communication. Research is being conducted in this field to study the transmission properties of PCF and how these properties can be improved to get an optimum design for PCF for different applications. In this book, light has been passed through a PCF which has low confinement loss and dispersion properties. The Mathematical Model for light propagation through PCF has been presented. The purpose of a design with low confinement loss and dispersion is to find the application of PCF in Wavelength division multiplexing system in which low loss and dispersion is required.
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#### Rengachari Gopalan Sangeetha Microstrip Patch Antenna Array with Omnidirectional Pattern

4252 руб.
Microstrip is the name given to a type of open wave guide structure which is now commonly used in present day electronics not only as transmission lines but for circuit components such as filters, couplers, resonators etc. They have some well-known advantages such as small size, lightweight, low profile and low cost.This work had a broader scope of analysis, design, fabrication, testing and implementation of aperture coupled microstrip patch antenna array with omni-directional pattern. An aperture coupled microstrip antenna used aperture coupling and does not require a direct connection between the patch and the feed line. A small aperture in the ground plane located under the patch allows coupling from the feed line.The feed network requirement for the array to the required amplitude distributions has been addressed. Typically, these arrays of microstrip antennas are used to reduce overall ripple in the roll pattern of the antenna. This entire project has been carried out in LRDE, DRDO, Bangalore.
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2890 руб.
Electromagnetic shielding is frequently used to reduce the emission or to improve the immunity of the electronic equipments against interferences. The ability of an enclosure to perform this task is characterized by its shielding effectiveness (SE). Among all parameters that could be adopted by a designer, shielding is important due to its controllability. The SE of a metal enclosure is determined mainly by its general shape and its apertures. Therefore, this book provides a complete study of the effects of these parameters on SE. Numerical method in electromagnetic is used to find the effect of these parameters on shielding performance. Some practical techniques to enhance the shielding performance are introduced. At the last chapter of the book, a novel method based on matching load has been explained. In this method an aperture load is used to eliminate the resonance frequency of the metallic enclosure.
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#### Guoping Wang Transfer Matrix Method for Multibody Systems. Theory and Applications

15267 руб.
TRANSFER MATRIX METHOD FOR MULTIBODY SYSTEMS: THEORY AND APPLICATIONS Xiaoting Rui, Guoping Wang and Jianshu Zhang – Nanjing University of Science and Technology, China Featuring a new method of multibody system dynamics, this book introduces the transfer matrix method systematically for the first time. First developed by the lead author and his research team, this method has found numerous engineering and technological applications. Readers are first introduced to fundamental concepts like the body dynamics equation, augmented operator and augmented eigenvector before going in depth into precision analysis and computations of eigenvalue problems as well as dynamic responses. The book also covers a combination of mixed methods and practical applications in multiple rocket launch systems, self-propelled artillery as well as launch dynamics of on-ship weaponry. • Comprehensively introduces a new method of analyzing multibody dynamics for engineers • Provides a logical development of the transfer matrix method as applied to the dynamics of multibody systems that consist of interconnected bodies • Features varied applications in weaponry, aeronautics, astronautics, vehicles and robotics Written by an internationally renowned author and research team with many years' experience in multibody systems Transfer Matrix Method of Multibody System and Its Applications is an advanced level text for researchers and engineers in mechanical system dynamics. It is a comprehensive reference for advanced students and researchers in the related fields of aerospace, vehicle, robotics and weaponry engineering.
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#### Mirmiran Majid Insertion of a Function

8364 руб.
1-Insertion of a function belonging to a certain subclass of ${\bbb r}^x$}. 2-Insertion of a continuous function between two comparable precontinuous (semi-continuous) functions. 3-Strong insertion of a continuous function between two comparable precontinuous (semi-continuous )functions. 4-Insertion of a contra-continuous function. 5-Strong insertion of a contra-continuous function. 6-insertion of an $\alpha-$continuous function. 7-Insertion of a continuous function between two comparable $\alpha$continuous ($c-$continuous) functions.
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#### Li Han-Xiong System Design and Control Integration for Advanced Manufacturing

7390.98 руб.
Most existing robust design books address design for static systems, or achieve robust design from experimental data via the Taguchi method. Little work considers model information for robust design particularly for the dynamic system. This book covers robust design for both static and dynamic systems using the nominal model information or the hybrid model/data information, and also integrates design with control under a large operating region. This design can handle strong nonlinearity and more uncertainties from model and parameters.
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#### Chijioke Amakom Radioactivity in Environmental Media

8789 руб.
THE ACTIVITY CONCENTRATIONS OF RADIONUCLIDES AND PHYSICHOCHEMICAL PARAMETERS USED AS WATER QUALITY INDICATORS WAS MEASURED IN BOREHOLE, WELL AND STREAM SAMPLES OF OBAFEMI OWODE AND ODEDA AREA OF OGUN STATE, SOUTH WESTERN NIGERIA. THIS WAS ALSO MEASURED FOR THE PALM OIL PRODUCED LOCALLY BY THE LOCAL POPULATION. THE PHYSICOCHEMICAL PARAMETERS INDICATED LOW HYGINIC QUALITY OF THE WATERS CONSUMED BY THE LOCAL POPULATION. HIGH LEVELS OF RADIONUCLIDES WERE ALSO PRESENT BEYOND THE MAXIMUM DAILY INTAKE FOR URANIUM. THE PALM OIL SAMPLES WERE RELATIVELY OK COMPARED TO THEIR WATER COUNTERPART.
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#### Shinde Sachin, Jagtap Vidyasagar, Panchal Rahul Optimal Design of Composite Structure Under Uncertainty

7414 руб.
These books cover current research area uncertainty analysis. The different technique is available with this book. The proposed technique is Monte Carlo method, for three hollow composite (Rectangular, Circular And Aerofoil) beams made of laminated composites and subjected to bending loads, has been carried out under uncertainty in bending stress for statical and transient analysis. Bending stress was objective function. Geometric parameters, Material parameters Composite Parameters and Load parameter are randomly varied for optimization within effective range and their effect on bending stress has been analysed.
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#### Tao Wang Sliding Mode Fault Tolerant Reconfigurable Control

5465 руб.
SMC-based FTC for nonlinear systems are developed to handle both partial loss faults and total failures in control surfaces. The first method is developed to accommodate both modeling uncertainty and uncertainty incurred by faults. Different design parameters are utilized to deal with the uncertainty incurred by fault and that due to modeling errors respectively in the SMC design. Direct adaptive control is combined into such a SMC to alleviate the requirement of the a priori knowledge of the uncertainty bounds. The second method is developed to redistribute the control effort between faulty regular actuator and redundant actuator autonomously based on effectiveness of the regular actuators. The tolerability of the developed controller is characterized by the amount of fault that controller can deal with. It is used as the threshold to activate the redundant actuator when the regular actuator cannot accommodate the fault alone. The third method without a dedicated FDD is developed based on the absolute quantity of switching surface. The control effort is redistributed to regular and redundant actuator autonomously by monitoring the absolute quantity of the sliding surface.
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#### Omed Abdullah Modeling the Lattice Parameters of Solid Solution Alloys

4202 руб.
In this book, models for the prediction of lattice parameters of substitutional and interstitial solid solutions as a function of concentration and temperature are presented. For substitutional solid solutions, the method is based on the hypothesis that the measured lattice parameter versus concentration is the average of the interatomic spacing within a selected region of a Bravais lattice. The model is applied on Ni-Cu and Ge-Si solid solutions.For the interstitial solid solution of the Fe-C system, the method is based on the assumption that the change in lattice parameter of the pure Fe phase is due to the occupation by carbon atoms to the octahedral holes in the fcc austenite; and bct martensite.The model of lattice parameter versus temperature for both substitutional and interstitial solid solutions is based on the relative change in length and vacancy concentration at lattice sites that are in thermal equilibrium. Combinations of both models then facilitate the calculation of lattice parameters as a function of concentration and temperature. The results are discussed accordingly.
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#### Garikayi Talon, Nyanga Lungile, Mhlanga Samson Model Reference Adaptive Fuzzy Control Systems for Automated Ginning

8364 руб.
Moisture content (mc) within the cotton fibre is an important aspect for all stages of the ginning process. However due to the process dynamics, mc is currently being controlled by regulating the water and air temperatures from the Humidifiers. Human intervention and lack of consistence on set-points determination has resulted in inconsistent mc during humidification. This procedure requires a control system which will be able to adjust the process set-points automatically by eliminating the need for human intervention. In this paper a robust Model Reference Adaptive Control (MRAC) system for a Samuel Jackson Humidifier is presented. This system improves upon the existing system by creating a closed loop controller with parameters that can be updated to change the response from reference model. The control parameters are then updated based on this error thus the parameters converge to ideal values that cause the plant response to match the response of the reference model.
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#### Ambresh Prabhakar Ambalgi Compact Microstrip Antenna For Wireless Applications

4822 руб.
This book describes about the experimental and simulation work carried out on rectangular microstrip antennas (RMAs). The various RMAs have been designed and fabricated on easily available, low cost FR4 dielectric material at S-band frequency. The patch element (radiator) is excited using co-axial probe feed technique. The effect of slots, slits, stubs in enhancing the various antenna parameters such as compactness, impedance bandwidth and gain are studied in detail. Compactness, impedance bandwidth and gain of RMA has been enhanced using various techniques such as patch with slots, slits on patch, stubs loaded patch on 0.16 cm thick dielectric material with inverted patch configuration having air as a substrate medium. With these techniques, a compactness of 78%, 12.41% of bandwidth. It is also concluded that by etching the various slits on the patch having a superstrate thickness of 0.24 cm (2.4 mm thick Yagi-RMA and 2.4 mm thick H-RMA). This technique reduced the maximum physical size (compactness) of the antenna upto 98.3 % with a gain of 7.13 dB.These antennas may find applications in the wireless, microwave communication systems operating in L and S band of frequency range.
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#### Subramaniam Ganesan Model based design of Adaptive Noise Cancellation

9739 руб.
This book demonstrates the implementation of an improved adaptive Wiener filter on Texas Instruments TMS 320C6713 DSK board. A performance comparison of an improved adaptive Wiener filter with Lee's adaptive Wiener filter is illustrated. the profile parameters of the auto-code generated by the Real Time workshop for the Simulink model of LMS filter on TI C6713 DSK is compared with the C implementation of LMS filter on C6713. A LabVIEW model of adaptive noise cancellation based on an improved adaptive Wiener filter is implemented on C6713 using TIDSP Test Integration Tool kit.
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#### Naz Shagufta, Badar Hafsa, Hameed Absara Prevalence of genetic and environmental factors in Congenital Cataract

5489 руб.
Structure and physiological systems of the eye allows light perception. Human visual system functions when lens focuses the light onto the retina. Thus, any defect in the structure and function of the lens leads to vision loss. Lens malformations especially cataracts are the major cause of blindness worldwide and accounts for 10% of all childhood blindness. Low vision is any chronic visual condition which cannot be corrected by spectacles or contact lenses and becomes lower every day. Abnormalities in the lens, retina or any other part of the visual system leads to low vision. A retrospective, analytical study was performed on all congenital cataract cases from Lahore seen during ophthalmologic consultation at the Layton Rahmatullah Benevolent Trust. The objective of this research was to determine the environmental as well as genetic factors causing congenital cataract.
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#### Malek Benslama Connections Management Strategies in Satellite Cellular Networks

8444.29 руб.
This book provides a novel method based on advantages of mobility model of Low Earth Orbit Mobile Satellite System LEO MSS which allows the evaluation of instant of subsequent handover of a MS even if its location is unknown. This method is then utilized to propose two prioritized handover schemes, Pseudo Last Useful Instant PLUI strategy and Dynamic Channel Reservation DCR-like scheme based respectively on LUI and DCR schemes, previously proposed in literature. The authors also approach a different aspect of handover problem: calls with short durations dropped due to a handover failure. We propose a decision system based on fuzzy logic Rescuing System that allows the rescue of calls with short durations facing a premature at the expense of those lasting for long durations.
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#### Craig Blake The Equalizer - A Musical Method

1814 руб.
Craig Blake's method is a must-have for the practicing and professional musician. The Equalizer - A Musical Method is a natural and gravitational approach to song-writing by means of numbers and a balance-beam. Simply, create chord progressions with the balance-beam charts, then apply the compatible scales/scale-sets.The Equalizer - A Musical Method can be incorporated by novice, intermediate, and advanced musicians, and it can also be applied to any genre of music such as rock, blues, jazz, country etc., by incorporating the balance beam - it opened up a-whole-new-world of possibilities. My mission: Strive to design a system for music-writing that would ultimately assist the composer during the development process.
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#### John W. Jr. Campbell The Last Evolution by John W. Campbell, Science Fiction, Adventure

814 руб.
I am the last of my type existing today in all the Solar System. I, too, am the last existing who, in memory, sees the struggle for this System, and in memory I am still close to the Center of Rulers, for mine was the ruling type then. But I will pass soon, and with me will pass the last of my kind, a poor inefficient type, but yet the creators of those who are now, and will be, long after I pass forever.So I am setting down my record on the mentatype.
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#### Vikas Kumar Singh Plastic Mould Design

4419 руб.
This book gives an introduction to Plastic Mould Design with an industrial example of GO Filter Bracket. GO Filter Bracket part is used for assembly Fuel Filter with Lower Air Intake Manifold. The function is to assemble the Fuel Filter on Go Filter Bracket. After this subassembly, Fuel Filter is assembled on LOWER AIM. The part is engineered with thermoplastic PA66 GF 30 %. Mould design is done for 1 cavity because of low volumes production rate (40000 shots/year).The mould has to be designed for ENGEL 200T injection molding machine and with hot runner feed system. 2D & 3D CAD data of the mold to be generated using CATIA V5 Software. CAD Data will be used to enable the conventional and NC manufacturing (CAM). This injection mould design activity is an initiation to start tooling activities in CATIA V5 in the organization.
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#### Milo Thurston A Newer, Shorter and Easier Method of Fencing

3127 руб.
Sir William Hope's New, Short and Easy Method of Fencing represents a system by which a gentleman of the early 18th century might learn to defend himself with those swords commonly available to him, such as the small-sword. This book presents for the modern reader a curriculum for studying Sir William's idiosyncratic, yet effective, system for fighting with that weapon. Included also are some notes upon the spadroon as well as a discussion of techniques in his earlier work, The Sword-Man's Vade Mecum.
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4419 руб.
In this book, DNA- based cryptography methods are proposed as combined with data hiding techniques for an increased level of security using basic concepts and properties of the Deoxyribonucleic Acid (DNA). These methods are implemented mainly on two stages: the first encrypts the plaintext using Amino acid and DNA based Playfair cipher. The second applies a secure insertion, complementary or substitution methods to hide the encrypted DNA ciphertext into some reference DNA sequence. The proposed techniques are Playfair-insertion, Playfair-complementary and Playfair-substitution. Finally, Playfair-insertion-substitution method is introduced to achieve extremely data security.
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#### Sherla Sreevidya, Naresh Elisetty The Effect Of Filtering On Speech Identification Scores

5902 руб.
The present study made an attempt to find out the effect of spectral variations on perception of speech in young normal hearing adults. The study showed that the spectral information between 1500 Hz and 2100 Hz are important for perception of speech in Telugu & was no difference found in lower cut off is important in perception of speech in Telugu compared to English language.The speech identification scores improved with increase in low-pass cut off frequencies and with decrease in high-pass cut off frequencies. The participants obtained speech identification scores of 70% at low-pass cut off frequency of 1500 Hz and at high-pass cut off of 2100 Hz.
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2890 руб.
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#### Mashad Uddin Saleh,Iqbal Hasan and Nabeela Kauser Effect of FWM in Ultra High Speed DWDM Transmission System

3212 руб.
Optical dense wavelength division multiplexing (DWDM) system using different types of fiber such as standard single mode fiber (SSMF), dispersion shifted fiber (DSF), non-zero dispersion shifted fiber (NZDSF) and erbium-doped fiber amplifiers (EDFA) is now tremendously popular for communication networks due to its high information capacity, high-channel-count and low system costs. DWDM transmission systems effectively exploit the huge potential bandwidth of an optical fiber. Among the nonlinear processes, four-wave mixing (FWM) has the most serious effect that limits the allowable input power and system capacity by generating new waves, which cause performance degradation of long-haul multi-channel light wave transmission systems. Though FWM effects are less on high dispersive system, as an effort to increase information capacity, designs are continually modified by decreasing channel spacing, increasing bit rate and input power, and in such cases even FWM has severe effects on high dispersive fiber. The system performances are studied on high dispersive SSMF varying system parameters such as bit rate, channel spacing, channel count, transmission reach and input power.
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354271 руб.
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#### Pearson Chaurura and Kudzai Chuma-Chaurura Retail Stock Loss Menace

3944 руб.
This study was carried out to determine the perceptions of clothing retail employees in Bulawayo, Zimbabwe regarding dominant routes of stock loss and the control methods against them. This was done with a view to determine the degree of fit between problem and control method and then make appropriate recommendations. The study was conducted by way of a survey involving six (6) clothing retailers located in different positions in and around the city of Bulawayo. Three (3) of these retailers operate chain stores in Bulawayo. Questionnaires were sent out to a total of 75 clothing retail employees at the levels of manager, (34.7%), supervisors (24%) and sales or shop-floor personnel (41.3%). The study established that employee clerical errors were the perceived dominant route of stock loss, yet the dominant stock loss method appears to be the use of security personnel. Apparently, there is a clear lack of fit between the real problem and the popular control method. It would seem sensible for clothing retailers, and indeed other retailers, to pay more attention to training employees to curb employee clerical errors.
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#### Andreas Beuschel Load Compensation in Three Phase Power Systems

8377 руб.
Inhaltsangabe:Abstract: The object of this thesis is to design software and hardware to obtain the device parameters of a compensator. This compensator should restore the balance and the power factor of a three-phase three-wire system by using reactive elements only. The derived parameters should be accessible remotely and displayed on a PC. L. S. Czarnecki recently presented a highly respected approach to derive the device parameters of the compensating susceptances. He defined the admittances Ye and A which represent the conditions in a three-phase system. He also suggested a way to derive these susceptances by measuring two line-to-line voltages and two line currents. The load balancing technique used in this project was based on Czarneckis approach. The first phase of the project concentrated on understanding and proving the theory behind the project by means of computer simulation. The second phase of the project involved writing software for the DSP and building an interface to successfully task the requirements set by the theory. The aspect of being able to transfer the data to a PC via a modem-to-modem connection was taken into account too. In the final stage it is shown that the implemented system is able to derive the necessary parameters in order to balance the currents and restore the power factor as supplied from mains. It was found that even though the supply from the University of Cape Town does not meet the requirements of the theory in terms of harmonic dist...
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#### Prashant S. Mahajan, Jagadish B. Jadhav, Pramod J. Deore Design and Implementation of Rectangular Patch Antenna for Tri-Band operation

3139 руб.
Master's Thesis from the year 2013 in the subject Electrotechnology, grade: First Class, , course: Master Of Engineering, language: English, abstract: In today's modern communication industry, antennas are the most important components required to create a communication link. Microstrip antennas are the most suited for aerospace and mobile applications because of their low profile, light weight and low power handling capacity. These antennas can be designed in a variety of shapes in order to obtain enhanced gain and bandwidth for dual band and tri-band operation. This book focus on a detailed study of how to design and simulate a microstrip fed rectangular patch antenna using IE3D software with effect of antenna dimensions length ( L ), width ( W ), relative dielectric constant , substrate thickness (t ) on the radiation parameters of bandwidth and gain. The design parameters of the antenna calculated using the transmission line model. Here antenna operates for tri- band operation, the operating bands are GSM , PCA and UTMS for antenna geometry -I and WLAN and WiMAX for antenna geometry -II. The fractional bandwidths (FB) after simulation obtain under criterion ( S_11 < -10 dB) are 6.45% for GSM [890-960 MHz], 4.25% for WLAN [2.40 - 2.51 GHz], 6.89% for PCA [1850-1990 MHz], 11.42 % for WiMAX [3.35 - 3.94 GHz], 9.09% for UTMS [1920-2170 MHz] and 18.18% for WLAN [5.02 - 6.63 GHz] and peak gain 2.43 dBi at 5.36 GHz.
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#### Kitty Mason Ultimate Guide for Low Carb Diet. The Truth About Low-Carb Diets For Weight Loss Success

739 руб.
Eating a low carb diet isn't unhealthy, in and of itself. The important thing to keep in mind is that diets based on carbs typically aren't actually achieving their effects through carbs. Instead, people often misattribute weight loss from a caloric deficit that comes with avoiding starchy fast food as being dueto the carbs. It's safe, but one has to be sure that they're still getting the proper amount of nutrients.
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#### Wen Hung LU PREDICTION METHOD OF AIR PRESSURE ON 2-PIPE STACK BUILDING DRAINAGE

8639 руб.
This research first examines the current condition of the building drainage system design in Taiwan, including an investigation 51 apartment buildings. The second part is to experiment on the air pressure in the vertical stack drainage system . An experimental device that simulates a medium-height apartment was set up to provide empirical parameters and model verification at NTUST. A considerable progress has been made in predicting the air pressure distribution within vertical drainage stacks.The third part focuses on a 2-pipe vertical drainage stack for conducting the empirical parameter and evaluation method of air pressure of building drainage systems. Next, the air pressure prediction in 2-pipe vertical drainage stacks from the predicted results of a single drainage stack has been illustrated.The study also conducts the comparison between the measured data and calculated values. It reveals that these prediction and evaluation methods can reproduce the mean air pressure distribution value in a vertical drainage stack. Meanwhile, the prediction method of air pressure in the 2-pipe stack drainage system has been successfully established in the study.
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#### Melisew Tefera Belachew Preconditioning Dense Complex Linear Systems from a VIM Discretization

9064 руб.
Angular-resolved optical scatterometry is a new promising technology for metrology in lithography for the construction of VLSI chips such as DRAMs and CPUs. In order to measure the geometry dimensions and material properties of markers and interconnect lines, one needs to solve Maxwell's equations for an electromagnetic scattering problem. The well known RCWA discretization method is too slow for 3D applications whence one takes resort to either a finite element discretization method or a volume integral method (VIM). VIM systems of equations can be solved faster than FEM systems of equations. This book focuses on an iterative solution of linear systems emanating from VIM. Each different linear system depends in a non-linear manner on several geometry, material and incoming light-wave parameters. For a typical 2D-periodic application on resist, VIM is a factor of 20 faster than RCWA. The VIM discretization leads to a dense complex linear system for the electric field for a 2D-periodic grating (3D Maxwell's equations). The coefficient matrix A is almost full but matrix-vector multiplications can be performed. Therefore; systems should be solved with an iterative solution method.
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#### Amit Ahirrao In-Cabin Airflow and thermal comfort analysis of passenger car

8639 руб.
In-cabin airflow and thermal comfort analysis of passenger car is study about car HVAC system and modular design parameters of vent outlets. For same opening area of air vent what is effect of different shapes of vents on velocities at vent outlet, pressure drop and percentage flow distribution. Study of overall thermal comfort for 3 hours of soaking followed by 1 hour cooldown is part of study. Transient analysis and to make it faster coupling of 2 solvers FLUENT and RADTHERM was main goal of project. Total transient analysis only in fluent considering conduction, convection and radiation takes 30 days which can be solved by coupled method in RADTHEM in 1 day.
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#### Wael Hussein Person identification using face and fingerprint authentication

5224 руб.
A biometric system is generally a pattern recognition system which makes a personal identification by determining the authenticity of a specific physiological or behavioral characteristic indigenous from the user. Unimodel biometric systems perform person recognition based on a single source of biometric information and are affected by problems like noisy sensor data, non-universality and lack of individuality of the chosen biometric trait, absence of an invariant representation for the biometric trait and susceptibility to circumvention. Some of these problems can be alleviated by using multimodal biometric systems that consolidate evidence from multiple biometric sources. In this project a new method of multibiomedical authentication system will be introduced using two types of biometric face and the finger print of the person to be identified. This method is based upon developing new hybrid transform from the combination of multiwavelet transform and wavelet network transform as a feature extractor and a classifier. In this proposed system multi method will be used to reach the best solution.
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#### Gordon Willmot E. Student Solutions Manual to Accompany Loss Models. From Data to Decisions

3816.75 руб.
Loss Models: From Data to Decisions, Fifth Edition continues to supply actuaries with a practical approach to the key concepts and techniques needed on the job. With updated material and extensive examples, the book successfully provides the essential methods for using available data to construct models for the frequency and severity of future adverse outcomes. The book continues to equip readers with the tools needed for the construction and analysis of mathematical models that describe the process by which funds flow into and out of an insurance system. Focusing on the loss process, the authors explore key quantitative techniques including random variables, basic distributional quantities, and the recursive method, and discuss techniques for classifying and creating distributions. Parametric, non-parametric, and Bayesian estimation methods are thoroughly covered along with advice for choosing an appropriate model. Throughout the book, numerous examples showcase the real-world applications of the presented concepts, with an emphasis on calculations and spreadsheet implementation. Loss Models: From Data to Decisions, Fifth Edition is an indispensable resource for students and aspiring actuaries who are preparing to take the SOA and CAS examinations. The book is also a valuable reference for professional actuaries, actuarial students, and anyone who works with loss and risk models.
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#### A. Sattar Ahmed Leaks and Blockages in Pipelines

9464 руб.
A new technique is developed utilizing the system pressure frequency response to locate and quantify leaks and blockages. The pressure frequency response is calculated at the downstream valve by the transfer matrix method. It is found that the presence of leaks and blockages alters the shape of the system pressure frequency response, the amplitude of pressure oscillations at even harmonics is increased and the amplitude at the odd harmonics is decreased. The increase in amplitude at the even harmonics is used to detect the location of leaks or blockages based on the leak and blockage frequency. For a simple pipeline, the technique successfully detected blockages up to 30% in size and leaks up to 2% of the mean discharge. Moreover, the computed results are verified by comparing with experimental measurements and those obtained by using the method of characteristics.
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#### Franklin Gillette Automatic Natural Weight Loss System

1514 руб.
Automatic Natural Weight Loss System is a revolutionary book that helps you to lose weight naturally. It focuses on recognizing the body's natural cycles and returning back to being in harmony with those cycles. Many people would love to lose weight safely and quickly without all the extra work. This book shows you how to practically and easily lose weight and keep the weight off! It also helps restore the body's natural functions. It is the ultimate do-it-yourself natural weight loss book.
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#### Erika Hauk Investigation of a Predictive Loss Balancing Method for the Three-Level Active Neutral Point Clamped Voltage Source Converter

4864 руб.
Nowadays, the application of Medium Voltage (MV) drives has grown due to the increasing demand of high efficiency and energy saving in industry, traction, power generation, power transmission, and distribution. Among the MV multilevel converters available on the market, the Three-Level Neutral Point Clamped Voltage Source Converter (3L-NPC VSC) has emerged as one of the most important topologies. One important disadvantage of this topology is the unequal power loss distribution and consequently, an unsymmetrical junction temperature distribution. In order to ensure that the most stressed power switches do not exceed the maximal allowable junction temperature, the converter output power and switching frequency have to be limited. To overcome this drawback, the Three-Level Active Neutral Point Clamped Voltage Source Converter (3L-ANPC VSC) was developed.There are two different loss balancing methods evaluated in this work: the already known Active Loss Balancing (ALB) method and a new method, the predictive active loss balancing (PALB) method. The use of the balancing methods applied to the 3L-ANPC VSC present outstanding results in all critical operation points as compared to the performance of the 3L-NPC VSC. Thus, the phase current and the output power range can be increased without exceeding the thermal limitation of the semiconductors. Furthermore, the loss balancing methods reduce the junction temperature ripple and consequently, the thermo-dynamical stress of the semicon...
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#### Victor Korol The Predistortion System for an Ultrawideband RF Transmitter

8914 руб.
The UWB standard became increasingly popular platform for implementing short range high data rate communication in various types of consumer electronic products. The need to maintain low power consumption while providing a reliable link justifies the development of a RF Transmitter Predistortion Linearization System, especially at the upper part of the useful frequency band of 6-10GHz, where larger propagation path loss and antenna interconnect losses are anticipated. The Tx Predistortion System allows an increase in the maximum usable linear power of the UWB transmitter on the order of 2-3dB. The digitally assisted analog baseband predistortion approach constitutes cost and power efficient method suitable for the commercial UWB chipset. This work reports design and performance of the transmitter linearization system using a baseband analog predistortion approach. The system is implemented as part of the commercial UWB transceiver chip in a 0.13um CMOS process.
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#### Karimi Mazaher, Mokhlis Hazlie Under-Frequency Load Shedding Scheme for Islanded Distribution Network

9064 руб.
Abnormal conditions such as overload and generator tripping usually result in large excursion of power system frequency, voltage and other system variables. In this case, an effective method to prevent the electric power system from instability, frequency collapse and blackout is an under-frequency load shedding scheme. It is applied in order to maintain stability of the system, when the power system generation fails to supply the increase of load. Load shedding is a common technique to maintain the power system stability by curtailment of partial load in some part of the system. However, the load shedding techniques for an islanded distribution network should be treated differently from the transmission power system. A particular approach of under-frequency load shedding scheme is required for an islanded system which is known to be not as strong as the grid.

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TRANSFER MATRIX METHOD FOR MULTIBODY SYSTEMS: THEORY AND APPLICATIONS Xiaoting Rui, Guoping Wang and Jianshu Zhang – Nanjing University of Science and Technology, China Featuring a new method of multibody system dynamics, this book introduces the transfer matrix method systematically for the first time. First developed by the lead author and his research team, this method has found numerous engineering and technological applications. Readers are first introduced to fundamental concepts like the body dynamics equation, augmented operator and augmented eigenvector before going in depth into precision analysis and computations of eigenvalue problems as well as dynamic responses. The book also covers a combination of mixed methods and practical applications in multiple rocket launch systems, self-propelled artillery as well as launch dynamics of on-ship weaponry. • Comprehensively introduces a new method of analyzing multibody dynamics for engineers • Provides a logical development of the transfer matrix method as applied to the dynamics of multibody systems that consist of interconnected bodies • Features varied applications in weaponry, aeronautics, astronautics, vehicles and robotics Written by an internationally renowned author and research team with many years' experience in multibody systems Transfer Matrix Method of Multibody System and Its Applications is an advanced level text for researchers and engineers in mechanical system dynamics. It is a comprehensive reference for advanced students and researchers in the related fields of aerospace, vehicle, robotics and weaponry engineering.
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