für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The development of a novel micro-bridge actuator for optical switching applications is presented in this book. It covers the design, simulation, micro-fabrication, and testing of the actuator including its integration with a vertical micro-mirror. Detail studies on the buckled shape multi-layered micro-bridge actuator, its bi-stability and two-way actuation, and thermo-mechanical behaviour have been carried out during the design phase. The studies lead to formulations of a new bi-stability design methodology, buckled shape and thermo-mechanical models. Finite element analysis using ANSYS and micro-fabricated structures are used to validate the methodology and models. Micro-fabrication techniques have been developed to form the actuator, and incorporate a vertical micro-mirror with the actuator to realize a monolithically integrated optical cross-switch. The fabricated device is packaged and actuated electro-thermally to characterise its mechanical and optical switching performances. The novelty of the actuator lies in enabling intial out-of-plane deflection, which facilitates future integration of planar silica waveguides with the switch on the same substrate relatively easily. ····· 1036188337
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The old ink and paper method of a biometric system is at risk to a variety of attacks. These attacks are intended to either avoid the security afforded by the system or to put off the normal functioning of the system. The old ink and paper method which is grossly susceptible to wear and tear makes it very vulnerable. Proper use of cryptography hash functions greatly reduces the risks in automated biometric systems as hackers have to find both secret key and template. It is evidenced that still fraud goes on to some extent. Here in this paper a new idea is presented to make system more secure by use of encryption and its HMAC code. Here the secret key (which is in the form of pixel intensities) will be merged in the picture itself while encoding and its unique corresponding HMAC code generated, and at decoding end only the authentic user will be allowed to decode and digitally encrypted hashed image is stored in the database for future references and usages. ····· 1036188330
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, detailed investigation of a recently proposed transistor-level defect-tolerant technique for nanoelectronics is performed. The investigated technique replaces each transistor by an N^2-transistor structure (N=2,3 ,k) and guarantees defect tolerance of all permanent defects of multiplicity (N-1) in each transistor structure. The theoretical and experimental analysis for the defect tolerance of stuck-open and stuck-short defects for quadded transistor structure i.e.,(N=2) is extended for the nona transistor structure i.e.,(N=3). Comparison of defect tolerance of transistor structures (N=2,3) against other techniques like Triple Intervowen Redundancy (TIR) and Quadded Logic (QL) is carried out experimentally. It is shown that the combinations of defect tolerance at both the transistor level and gate level have significantly improved circuit defect tolerance. For this, combination of Triple Modular Redundancy (TMR) with majority gate implemented with N^2-transistor structure is investigated in this thesis. Application of N^2-transistor structure for handling soft errors is also investigated and a novel approach based on quadded transistor structure is proposed. ····· 1036188309
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The status of a woman from the level of menstrual cycle to the various stages of pregnancy can be studied using various phonetic parameters. Simultaneous use of behavioural characteristic of amplitude,frequency,time duration,energy can pinpoint the status of a pregnant woman as well as the status of foetus including the delivery time and regarding the original condition , i.e. non-pregnant level. The proposed phonetic technique is comparable with other medical technique like pathological testing / C T Scan / X-ray etc.The conventional medical techniques are costlier as well as inconvenient to use and may have adverse effect on growth of foetus. ····· 1036188236
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book gives the complete information on VHDL & Verilog coding logic for a few analog and digital circuits with their test bench for verification. Hardware Description Language (HDL) is a Computer Aided Design (CAD) tool for the modern design synthesis of digital systems. The recent steady advances in semiconductor technology continue to increase the power and complexity of digital systems. Due to their complexity, such systems cannot be realized using discrete Integrated Circuits (ICs). They are usually realized using high-density programmable chips, such as Application Specified Integrated Circuits (ASICs) and Field Programmable Gate Arrays (FPGAs) and require sophisticated CAD tools. HDL is an integral part of such tools. HDL offers the author a very efficient tool for implementing and synthesizing design on chips. The author uses HDL to describe the system in a computer language that is similar to several commonly used software languages such as C Debugging. The design is easy, since HDL packages implement simulators and test benches. The two widely used Hardware Description Languages are Very-high-speed integrated circuits Hardware Description Language (VHDL) and Verilog. ····· 1036188233
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The criticality in handling the graphics data in an FPGA device has been addressed in this work.We have successfully shown how image data can be successfully converted to raw binary data and can be transferred as a file to the FPGA memory using the RS-232 link. Our design is very useful for those FPGA devices (low cost) which don t have a dedicated input graphics port but still there is a need to perform the processing of image data. Moreover, we have detailed out the EDK (Xilinx Inc.) development platform for building the embedded applications in FPGA systems using Microblaze soft-core processor. In this work we have also given a brief overview of creating programs using System C language.This work can work as a guide for the researchers and engineers who wish to build an embedded system for image processing applications. ····· 1036188195
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Stability is a prime concern in any dc voltage regulation system. However, closed-loop stability is not always guaranteed if a low-pass filter is present at dc-dc converter input. In this thesis small-signal transfer functions based on averaged modeling techniques are exploited to systematically formulate some design rules to avoid instability. Further, averaged modeling techniques are evaluated in this way as an effective tool for analyzing dynamic behavior of dc-dc converters and for acquiring physical insights into various dynamical phenomena. State-space averaged models are widely accepted in practice mainly because of their simplicity, generality and demonstrated practical utility. This research attempts to explore their capabilities and limitations especially from control perspective. One of the key contributions is the theoretical and experimental investigation of averaged modeling in Discontinuous Conduction Mode (DCM). In order to resolve the filter-converter instability issue, both passive and active solutions are profoundly studied in this work and a control solution based on full state-feedback with pole-placement technique is proposed. ····· 1036188060
····· lezzter Preis 59.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray OFDMA is used on the downlink of broadband wireless access networks such as Worldwide Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE) as it is able to offer substantial advantages such as combating channel impairments and supporting higher data rates. This book`s focus is on the development of practical resource allocation schemes for the OFDMA downlink. Imperfect Channel State Information (CSI), the limited capacity of the dedicated link used for CSI feedback, and the presence of a Connection Admission Control (CAC) unit are issues that are considered in this book to develop practical schemes. ····· 1036188039
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Many excellent books on digital logic design have followed the traditional approach of introducing the basic principles and theories of logic design and the building of separate combinational and sequential components. However, students are left to wonder about the purpose of these individual components and how they are used in the building of microprocessors-the ultimate in digital circuits. One primary goal of this book is to fill in this gap by going beyond the logic principles and the building of individual components. The use of these principles and the individual components are combined to build the real, dedicated custom microprocessors and general-purpose microprocessors. This book is intended as an introductory logic design book for students in computer science, computer engineering, and electrical engineering. It has no prerequisites, although the maturity attained through an introduction to engineering course or a first programming course would be helpful. ····· 1036188008
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The imperfections of the propagation channel due to channel fading and the self-generated noise from the RF front-end of the receiver cause errors in the received signal in electronic communication systems. When network coding is applied, more errors occur because of error propagation due to the inexact decoding process. In this book, we present a system called Partial Network Coding with Cooperation (PNC-COOP) for wireless ad hoc networks. It is a system which combines opportunistic network coding with decode-and-forward cooperative diversity, in order to reduce this error propagation by trading off some transmission degrees of freedom. PNC-COOP is a decentralized, energy efficient strategy which provides a substantial benefit over opportunistic network coding when transmission power is a concern. The proposed scheme is compared with both opportunistic network coding and conventional multi-hop transmission analytically and through simulation. The effectiveness of both opportunistic network coding and PNC-COOP depends not only on the amount of network coding but also on other factors that are analyzed and discussed. ····· 1036188005
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is mainly concerned with the design, construction and testing of a dual-band monopole microstrip patch antenna. A discussion of general antenna theory is included with some basic microstrip antenna theory for rectangular patches is introduced leading to formulas which are computed using the MAPLE computer algebra package. The design of compact monopoles, suitable for mobile phone use, is discussed with particular emphasis on dual-band monopoles. A suitable dual-band monopole is chosen to be analyzed in detail using the Ansoft High Frequency Structure Simulator (HFSS) package. The HFSS package is introduced and tested on a basic rectangular patch antenna to confirm well known results in the theory and literature. A dual-band monopole antenna is fabricated on a microstrip in the laboratory in both unwrapped form and wrapped form using the Proteus ARES package for automatic construction of the PCB boards. The multiband monopole and the microstrip patch antenna are tested in the laboratory of the University. The results are compared with the HFSS results and shown to be in general agreement with each other. ····· 1036187971
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The application of solid-state electronics in the electrical power field is steadily increasing and power electronics has gained tremendous importance. Power electronics has grown rapidly in recent years mainly due to the development of power semiconductor devices that can efficiently switch large currents at high voltages. These devices also offer high reliability and small size. This book creatively presents power electronic devices in a lucid way with necessary mathematical analysis. This is an ideal guide for practicing engineers as well as engineering students. ····· 1036187941
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is focused on the design of an ultrasonic dental scaler that uses piezoelectric sandwich transducer working with frequency 27 kHz. The maximal required ultrasound intensity at the tip of the applicator is 5W/cm2. It describes the process of the calculus creation, its effect on health and methods of removal. Especially, the ultrasonic method of removal is deeply discussed. Furthermore, the functional and block diagrams are built step by step. On the basis of this knowledge, the design and calculation of the applicator part is carried out. The power and voltage values are calculated from the tip towards the generator output. Last but not least, the design of the circuits of the transducer supply and control part is described. The diagrams are supplemented by the drawings of the printed circuit boards and part lists to provide reader with full documentation of the device. ····· 1036187871
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Wireless Sensor Networks (WSNs) are collections of low cost, low power and compact size computational nodes that sense an environment or monitor an area for some parameters of interest and forward such information to a central processing center or base station for appropriate processing. Now a day s energy consumption is one of the fundamental research issues to extend the sensor network life time. Clustering techniques reduce this consumption by aggregating the information of a cluster. When the clustering protocols are single hop, cluster head sends data to base station. But in multihop communication, cluster head communicate through other cluster head or any special nodes called relay node in heterogeneous sensor network. But in homogeneous network, selection of next node depends on flooding or gossiping technique that introduces serious energy consumption. Here we propose simple cluster to cluster communication architecture for randomly deployed homogeneous SN and develop an algorithm to select a set of relay nodes between clusters. The simulation result shows that our proposed technique prolonging the life time of a cluster head. ····· 1036187843
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray As the demand for portable electronic devices increase, the need to replace off-chip discrete devices with on-chip devices is imperative. Inductors are one such passive device that is widely used in low noise amplifiers, oscillators, etc. Current on-chip spiral inductors suffer from large parasitics and area for a meager value of inductance and quality factor. The need to overcome these issues has led to the development inductors with new geometries housing magnetic cores that show an enhanced inductance compared to the air core coil. In this thesis, we discuss the design of a three-dimensional spiral inductor with a Co-Fe nanoparticle core that will be fabricated as per the process rules set by VT MT SPL. The changes in the value of the inductance, resistance, quality factor and parasitics are studied for varying number of turns of the coil, thickness of the coil, spacing between turns and different materials used as the coil. An optimum design incorporating the least parasitics and reasonable inductance is proposed. ····· 1036187670
für 49.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, the significance of water protection and conservation is still increasing. Information about the state of water in soil is a key component in soil water monitoring, irrigation control systems and its optimization. The purpose of this work is to create a wireless sensor network for the measurement of soil water potential. The work includes the description of measurement methods, selection of appropriate method and its calibration. It also contains hardware and firmware realization of the two types of wireless modules, the end station with sensors and the base station for data reception. The realized application contains a user program which allows data logging, displays actual data or past characteristics and changes the system settings with a possibility to request system for the necessary information. ····· 1036187615
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray As a promising technique, OFDM has been widely used in many new and emerging broadband communication systems, such as digital audio broadcasting (DAB), high-definition television (HDTV), wireless local area network (IEEE 802.11a and HIPERLAN/2). However, as the OFDM signals are the sum of signals with random amplitude and phase, they are likely to have large PAPR that requires a linear high-power- amplifier (HPA) with an extremely high dynamic range, which is expensive and inefficient. Furthermore, any amplifier nonlinearity causes intermodulation products resulting in unwanted out-of-band power and also increases complexity of DAC-ADC convertors.This work describes some of the PAPR Reduction Techniques and comparison among them. ····· 1036187513
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V rabote issledovany jelektrodinamicheskie harakteristiki mnogoslojnyh cilindricheskih napravlyajushhih sistem. Rassmotreny ogranicheniya sushhestvujushhih matematicheskih modelej i puti ih preodoleniya. Opisan razrabotannyj avtorami universal`nyj metod analiza sloistyh struktur. Privedeny rezul`taty chislennogo modelirovaniya razlichnyh struktur razrabotannym metodom i ih analiz. Dany rekomendacii po vyboru parametrov otkrytyh i zakrytyh linij peredachi v zavisimosti ot oblasti ispol`zovaniya. Predlozheny sposoby rasshireniya rabochej polosy chastot kak v odnovolnovom rezhime, tak i pri rabote na vysshih tipah voln. ····· 1036187456
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Programmable Logic Controllers (PLCs) are electronic devices which can be found everywhere nowdays. This reason motivates the creation of a system to allow the possibility to know the data stored in a PLC, not necessarily being next to it. This remote management system is based on a PC and a PLC, connected to Internet via Ethernet. The objective is that these two devices are able to exchange information by means of a communication protocol. For this purpose, a function-blocks (FBs) library has been created according to the IEC 61131-1 standard, which allows to archive the data in the memory of the PLC, among many other interesting functionalities. It has been also created a PC application, which will work as a human-machine interface (HMI). A TCP based communication protocol has also been implemented to allow transference the data between devices via Ethernet. ····· 1036187413
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray LabVIEW is a graphical programming environment used by millions of engineers and scientists to develop sophisticated measurement, test, and control systems using intuitive graphical icons and wires that resemble a flowchart. It offers unrivaled integration with thousands of hardware devices and provides hundreds of built-in libraries for advanced analysis and data visualization all for creating virtual instrumentation. The LabVIEW platform is scalable across multiple targets and OSs, and, since its introduction in 1986, it has become an industry leader. ····· 1036187353
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work includes a proposed wireless AM system based on SDR using FPGA. The main units of this system are BPSK modem, QPSK modem , 8QAM modem , inserting pilot channel and SNR measurement channel. The backbone of AM is the real time measurement of the SNR in order to select the required AM technique . The measurement of SNR is required to separate the noise from receiving signals in order to find SNR. There are two techniques to separate noise from receiving signals either using the detected signal or by using pilot symbol assisted modulation (PSAM) technique. ····· 1036187301
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Surface acoustic wave (SAW) devices are widely used for communications and sensor applications. Making SAW devices tunable would make them more flexible and expand their applications. In this work, a novel monolithically integrated tunable SAW (MITSAW) device is proposed, designed and analyzed. The device consists of zinc oxide (ZnO) and magnesium zinc oxide ((Mg,Zn)O) multilayer structures grown on sapphire substrates, and utilizes their piezoelectric and semiconducting properties. It is shown that (Mg,Zn)O is piezoelectric for Mg mole concentrations less than 35%, where the compound has the wurtzite crystal structure. For piezoelectric (Mg,Zn)O, the acoustic velocities increase and piezoelectric coupling coefficients decrease as the Mg composition increases. In the MITSAW device, the SAW velocity can be tuned using the interaction between electrons at the (Mg,Zn)O / ZnO interface and the electric fields accompanying the propagating SAW. A large tunability range with high acoustic velocities are predicted for MITSAW devices using the Sezawa wave mode, leading to better performance compared to GaAs based tunable SAW devices. ····· 1036187280
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The design of controllers for non- linear systems in industry is a complex and difficult task. The development of non-linear control techniques has been approaches in many different ways with varied results. One approach, which has shown promise for solving nonlinear control problems, is the use of fuzzy logic control. This book will discuss the Magnetic Levitation (Maglev) models as an example of nonlinear systems. It will also show the design of fuzzy logic controllers for this model to prove that the fuzzy controller can work properly with nonlinear system. Genetic Algorithm (GA) is used in this book as optimization method that optimizes the membership, output gain and inputs gain of the fuzzy controllers. Finally, fuzzy controller will be implemented using FPGA chip. The design will use a high-level programming language HDL for implementing the fuzzy logic controller using the Xfuzzy CAD tools to implement the fuzzy logic controller into HDL code. This book is designed for the professional and academic audience interested primarily in applications of fuzzy logic in engineering and technology. ····· 1036187074
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis investigated 3D Head Modeling for Model Based Video Coding.Model based video coding techniques have attracted considerable interest in multimedia applications where bandwidth considerations are of utmost importance. 3D facial synthesis has been frequently used in model based video coding applications. The book presents an implementation of a 3D head model, its adaptation algorithm to adapt the model to the different faces and a texture mapping method using two orthogonal face images to solve several 3D estimation problems. The frames between the front and the side view are successfully estimated. The experimental results show that the overall facial synthesis system increases the visual quality of the synthesized frames while achieving acceptable Peak Signal to Noise Ratio values. ····· 1036187041· 1 · ::::: · 31 ·· 32 ·· 33 ·· 34 ·· 35 ·· 36 ·· 37 · ::::: · 46 ·
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