für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Las comunicaciones multipunto ofrecen, tanto a usuarios como a proveedores, mayor eficiencia, permitiendo desarrollar e implantar nuevos servicios. Para poder desplegarlos adecuadamente es necesario contar con protocolos adecuados a todos los niveles. El soporte de conexiones multipunto, que es inmediato en muchas redes de ordenadores, por la existencia de un medio compartido, no lo es en una red ATM o en una red IP. En este tipo de redes, ofrecer una comunicación multipunto requiere de mecanismos complejos que coordinen y controlen la transmisión de información entre las fuentes y los receptores. Para el caso multipunto, los conmutadores ATM deben desarrollar mecanismos que limiten y agreguen el tráfico de realimentación. Se ha desarrollado un algoritmo de consolidación que asegura que la agregación de la información de realimentación se realiza de forma correcta, mejorando la convergencia de propuestas anteriores. En Internet, en este libro se presenta un protocolo de transporte punto a multipunto fiable, RCCMP, diseñado para ser escalable, fiable y con un control de congestión de tasa única que comparta el ancho de banda equitativamente con TCP. ····· 103611651
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El control difuso de reguladores conmutados DC-DC surge como alternativa a las limitaciones de técnicas de control lineal y no lineal, limitaciones debidas al control de la dinámica exclusivamente local en el primer caso, y por dificultades de implementación en el segundo. Esta alternativa se sustenta en la capacidad de los controladores difusos de asignar distintas leyes de control en función de la dinámica del regulador. Por otra parte, para garantizar el control ciclo a ciclo del convertidor, este trabajo se enmarca en la aplicación de un circuito integrado de propósito específico de alta velocidad para el control difuso de convertidores conmutados. Atendiendo a lo anterior, los objetivos de este trabajo han sido proponer técnicas de diseño de controladores difusos para convertidores conmutados DC-DC elementales que operen tanto en condiciones de pequeña señal como de gran señal y desarrollar herramientas CAD orientadas a facilitar una futura implementación mediante un circuito integrado de proposito específico. ····· 103611542
für 26.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La llegada de los elementos de estado sólido durante la segunda mitad del siglo XX redujo las exigencias de potencia de muchos dispositivos, pero evidencio que la mayoría de los dispositivos de estado sólido no eran capaces de manejar grandes niveles de corriente. Mucho de lo que se desarrollo a base de transistores a nivel de electrónica digital era tan o más complejo de diseñar que lo que se hacia a base de contactores y reles, y manejaba niveles de potencia menores. Cuando finalmente se empezó a desarrollar semiconductores con propiedades diferentes a los transistores, que requerían de pequeñas señales para su control y que manejaban niveles de corriente similares a los reles de potencia, es cuando se puede afirmar que se inicia la electrónica industrial. Esto abarca un periodo de aproximadamente 40 años de desarrollo, y ya que la forma de operación de los dispositivos usados difiere de la de los dispositivos de electrónica digital o de los usados en comunicaciones analógicas, se ha ganado su propio espacio de estudio. ····· 103611485
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Con el incremento de prestaciones en los circuitos integrados, y la mayor demanda de aplicaciones portátiles, la estimación del consumo se ha convertido en un factor clave en el diseño. El impacto de las técnicas de reducción del consumo es especialmente significativo en niveles altos de abstracción, por lo que se hace necesario por parte del diseñador disponer de técnicas de predicción del consumo a los niveles de sistema y arquitectura. A nivel RTL se caracteriza el consumo de los bloques básicos en macro bloques, que dependen de las propiedades estadísticas de las señales asociadas a éste bloque. Se presenta una nueva metodología de estimación del consumo para circuitos a nivel arquitectura o RTL (register transfer level). La metodología presentada resuelve la propagación de los valores estadísticos de las señales del circuito de una manera eficiente. La técnica está basada en la caracterización de éstas desde un punto de vista frecuencial. También se presenta un nuevo método de caracterización a nivel de sistema del consumo, de tal manera que permite facilitar, de una manera eficiente, la selección entre diferentes alternativas de diseño. ····· 103611462
für 39.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Se le atribuye a Platón el decir que si una disciplina no puede medir o pesar de alguna forma las magnitudes que le interesan, queda muy poco de esa disciplina. El hecho es que en el campo científico siempre ha habido necesidad de desarrollar técnicas de medición de alguna especie, y ello ha llevado a desarrollar toda clase de métodos, de una forma directa o indirecta. Siempre se ha requerido de los medios para llevar a cabo la medición de toda clase de magnitudes físicas. Diversos instrumentos se han usado para ello a lo largo del tiempo, pero el desarrollo de la electrónica en el siglo XX ha hecho posible contar no solo con los instrumentos sino con toda una disciplina especializada a su alrededor. ····· 103611320
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book contains the background history of a Target locking system, the components description used in designing this system. It also contains the software development portion, software which we have programmed, their flowcharts and explanations. At the end of the thesis we have given the conclusions, our experience, future enhancements that can be done in this project and recommendations that can take this project to a much higher level. The main and by far the most important goal which we want to achieve is the implementation of a target locking system in real time with the following characteristics To design a stable hardware of Target Locking system that can be cover maximum area. Design should be capable of handling any future advancement in the operating system. The cost of Target Locking system should be less than the that available in the market, but should provide more features than them. ····· 103611041
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A detailed and systematic methodology on the design of the inductively-degenerated LNA, also known as the SNIM LNA, for W-CDMA application is presented in this book. Detailed voltage gain, S-parameters and noise derivations for the SNIM LNA are provided. This is followed by comprehensive circuit analysis, design methodology and performance comparisons of the modified SNIM, namely the PCSNIM, CR and FC LNAs. Results show that for applications with low voltage requirement, the FC offers good linearity at a comparable NF, with gain as the trade-off. CR and matched SNIM are comparable in all of the performance metrics, but matched SNIM posed a disadvantage in terms of space. A PCSNIM with output buffer was designed to maintain the matched conventional PCSNIM noise figure (NF) merit over the SNIM, but with much less layout space consumed by the latter which is better for circuit integration.Good reverse isolation obtained proves the merit of the cascode topology. Comprehensive analysis on the extreme condition effects on the SNIM s performance is given with two types of post-layout simulations performed, i.e. with the distributed R+C+CC and the lump parasitic. ····· 103611008
für 55.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book introduced an approach to design and implement an embedded SoPC (System on Programmable Chip) technique with Altera Nios II processor on a FPGA chip for real-time speech recognition system by developing hardware/software with minimum usage of resources (hardware components) and relatively small size software. This reduces the memory utilization, achieved by using Mel Frequency Cepstral Coefficients (MFCCs) technique as feature extraction combined with its first derivative ( MFCCs) including power computation of the speech frames (i.e. E,MFCC, E,and MFCC), called observation vector of the speech signal. To model the obtained observation, Gaussian Mixture Model (GMM) has been used, which is passed to a Hidden Markov Model (HMM) as probabilistic model to process the GMM statistically to take a decision on the uttered words recognition, whether a single or composite, one or more syllable words (i.e. one, six, welcome). The words that are used for training and testing the system included selected English and Arabic words. ····· 10361963
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ultra-Wideband (UWB) is an alternative wireless communications technology that offers high bandwidth wireless communications without the constraints of spectrum allocation. Fundamentally different from conventional radio frequency communications, UWB relies on a series of narrow, precisely timed pulses to transmit digital data. Transmitters and receivers that use UWB can be much simpler to build than their conventional counterparts, resulting in lower cost and higher power efficiency. Moreover, the inherent properties of UWB emissions allow them to potentially coexist with conventional wireless systems on a non-interfering basis. This book envisages the uniqueness features that UWB can provide for indoor and low rate outdoor communication arenas. ····· 10361922
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book describes in a comprehensive manner the components and systems of non-linear fiber optic communications system. The first section explains the theory of single-mode fibers, then the nonlinear issues, including cross phase modulation, self-phase modulation, four wave maxing, stimulated briliouin scattering and stimulated raman scattering. The second section describes the Power budget power penalty and cost benefit analysis for long-haul high capacity optical communication networks. Finally, the optical transmission system design is explained, and techniques how to mitigate non-linear issues, and increasing the system capacity in terms of data rate speed, path cover and bandwidth capacity. ····· 10361864
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work describes the development and application of statistical circuit simulation methodologies to analyse digital circuits subject to intrinsic parameter fluctuations. The specific nature of intrinsic parameter fluctuations are discussed, and the crucial importance to the semiconductor industry of developing design tools which accurately account for their effects are explained. Current work in the area is reviewed, and three important factors are made clear: any statistical circuit simulation methodology must be based on physically correct, predictive models of device variability the statistical compact models describing device operation must be characterised for accurate transient analysis of circuits analysis must be carried out on realistic circuit components. ····· 10361824
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Digital signal processing (DSP) is currently the most widely used means of resolving problems in the field of information technology, automation, measurement technology, science and other fields. Digital systems have many advantages over analog systems. DSP system can be easily modified through a modification of the software. In the case of an analog system modification is necessary to change the design of the whole circuit. DSP system can be easily and accurately reproduced. The analog system is loaded with components tolerance and dependence on temperature or supply voltage. Features DSP system does not change with time, because the properties of digital components do not change with time. In our text we will focus on theoretical and practical aspects of implementation of digital filters using ATxmega16 microcontroller from Atmel. ····· 10361822
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Most computers today support binary floating-point in hardware. While suitable for many purposes, it should not be used for financial, commercial and user-centric applications or web services because the decimal data used in these applications cannot be represented exactly using binary floating-point. The problems of binary floating-point can be avoided by using base 10 (decimal) exponents and preserving those exponents where possible. The design performs addition and subtraction on 64-bit operands in a single path adder with exception handling fulfilling the released standard and it can easily be extended to also support operations on 128-bit decimal floating-point numbers. The overall performance of the decimal adder was compared from the point of view of area and speed for the same FPGA families. We synthesized the design for two families of Xilinx, Spartan II and Vertix II. Complete test and verification is performed on all the design versions fulfilling 3063 test vectors supplied by IBM Corp. and supporting 7 rounding modes (5 stated by the standard and 2 proposed by IBM) with exception handling for overflow, inexact and invalid operations. ····· 10361782
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is primarily intended for use by undergraduate and postgraduate students who are specializing in communication systems and wish to understand the principles and current practices of the wireless communication channel, I have therefore included examples and problems in each chapter to reinforce the material described and to show how they are applied in specific situations. Additionally, much of the material has been used as parts of short courses run for many of the leading industrial companies in the field, so I hope that it may also be of interest to those who have a professional interest in the subject. Hopefully the reader will find that this book provides sufficient understanding to make the required judgments for most applications. ····· 10361627
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Digital watermarking includes a number of techniques that are used to imperceptibly convey information by embedding it into the cover data. There has always been a problem in establishing the identity of the owner of an object. In case of a dispute, identity was established by either printing the name or logo on the objects. But in the modern era where things have been patented or the rights are reserved (copyrighted), more modern techniques to establish the identity and leave it untampered have come into picture. Unlike printed watermarks, digital watermarking is a technique where bits of information are embedded in such a way that they are completely invisible. The problem with the traditional way of printing logos or names is that they may be easily tampered or duplicated. In digital watermarking, the actual bits are scattered in the image in such a way that they cannot be identified and show resilience against attempts to remove the hidden data. ····· 10361593
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Digital watermarking is a technique in which a secret image is embedded into host image. watermarking is used in a variety of applications such as copyright protection, covert communication, Tamper proofing and Medical applications. For the embedding purpose spatial domain techniques were used in early days. Now various transform domain techniques are used for the embedding purpose. some of the transform domain techniques are Discrete Cosine Transform, Discrete Fourier Transform, Curvelet transform and Contourlet transform. Among these transform domain techniques contourlet transform is used because of its ability to deal with two dimensional images. Contourlet transform represent images containing contours and textures very efficiently as it is a geometrical image based transform. Contourlet transform has played a major role in producing the watermarked image with good perceptual quality. ····· 10361535
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book it is being attempted to implement basic JPEG compression using only basic MATLAB functions. Here we use the lossy compression technique where data loss can not effect the image clarity in this area. JPEG image compression addresses the problem of reducing the amount of data required to represent a digital image. It is also used for reducing the redundancy that is nothing but avoiding the duplicate data. It is also used for reduce the storage compression area to load an image, for this purpose we are using JPEG. This book describes the successful implementation of JPEG image compression by using the MATLAB software. ····· 10361516
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Delay in cardiac repolarization causes ventricular tachyarrhythmias as well as Torsade de pointes (TdP). A feature of TdP is pronounced prolongation of the QT interval in the supraventricular beat preceding the arrhythmia. TdP can degenerate into ventricular fibrillation, leading to sudden death. Thus QT interval measurement and regular verification of the interval is important for analyzing cardiac health. A novel and simple approach to determine the duration of ventricular repolarization, i.e. QT interval of a recorded ECG wave is proposed here. Here a fully automatic method for measurement of QT interval is proposed, i.e. by five-point differentiation of ECG data and noting the slope change of the resulting graph. Points with zero slopes were considered as the end of respective waves. The algorithm is tested with physionet database. So this thesis contains the basics of ECG DATA ANALYSIS in the TIME PLANE with MATLAB based Programs and results all based on the 2006 Challange of Computers in Cardiology now called Computing in Cardiology (It is benifical for the firstimers working in ECG Signal Processing. ····· 10361513
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray With the advent of newer, faster & smarter Electronics Systems and ever shrinking Fabrication Technology, Low power is a must requirement in VLSI. The work presented in this book talks about Low power VLSI in general and Multi-Threshold CMOS and Charge Recycled Multi-Threshold CMOS specifically. The book starts with a general discussion about the need of Low power VLSI and techniques to achieve that. It concludes with a performance comparison of Conventional CMOS, MTCMOS & CRMTCMOS and then presents a way to optimize the Power saving and Wake-up delay in CRMTCMOS. My work here may be considered just a first step and I hope that this work inspires some more research work in this area. -Prachi Mittal ····· 10361430
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book explains the method to control the three basic things of an induction motor. 1.Switching 2.Direction of rotation 3.speed. This book explains the simple ways to control the direction of the motor and switching of the motor. By switching i mean the on off state of the motor. To control the spped of the motor i have used cycloconverter. The advantage of cycloconverter of using cycloconverter is that on low speed the torque of the motor is maintained while using other methods we face a problem that on low speed the torque of the motor is reduced which is a major cause of wastage of electricity. Cycloconerter is direction conversion method means that it has no intermediate stage while changing the supply frequency given to the motor. Which shows that it power is maintained even at low speed.In most of the cases while changing the frequency we change the frequency first we converter AC into DC and then back to AC to change the frequency while in cyclonverter there is direction conversion, no intermediate state which is good for both power and torque of the motor. ····· 10361418
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents a simple architecture for Programmable Voltage Controlled Ring Oscillator (VCRO) on 3-stage ring topology. Two variants of Programmable VCRO are proposed. The proposed designs contains input stage, current steering circuit, current mirror circuit, 3-stage ring oscillator and output stage to generate the output signal of the specified frequency by the control of three bit digital inputs. ····· 10361404
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book on security system provides the detail of how to make security system Intelligent, robust, portable and economic. It also provide the detail of various Image Processing Algorithms, Introduction to Matlab, Video Capturing and Transmission mechanism, Tracking phenomena, Communication between PC and external world, Microcontroller - focused on 8051, GPRS and MMS Technologies, and robotics i-e mainly focused on the practical implementation of Robotic arm. Sample program written in assembly language based on intel 8051 is provided for controlling the motion of the mentioned arm, also the sample of program written in C sharp is given for the implementation of MMS. ····· 10361335
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Razvitie metodov izmerenij, kontrolya i ispytanij, opirajushhihsya na sovremennuju bazu vychislitel`noj tehniki, privelo k peresmotru ustoyavshihsya procedur izmerenij, preobrazovanij izmeritel`noj informacii i posledujushhego ee ispol`zovaniya dlya prinyatiya reshenij. Jeto povleklo za soboj potrebnost` vkljucheniya v procedury kontrolya i ispytanij izvestnyh nauchnyh metodov obrabotki izmeritel`noj informacii. Izmeritel`naya tehnika ispol`zuetsya prakticheski vo vseh oblastyah chelovecheskoj deyatel`nosti ot promyshlennosti i transporta do tochnyh metodov i nanotehnologij, pred#yavlyajushhih osobye trebovaniya k izmereniyam v himii, fizike, biologii, medicine. V knige soderzhatsya osnovnye svedeniya o vidah i metodah izmerenij, kontrolya i ispytanij. Dana klassifikaciya vneshnih vozdejstvujushhih faktorov, privoditsya opisanie ispytanij produkcii na vozdejstvie vneshnih faktorov i metodiki ih provedeniya. Opisyvajutsya ispytaniya produkcii na nadezhnost`. Rassmotren poryadok provedeniya attestacii tehnicheskih sredstv ispytanij i sertifikacii produkcii. Kniga budet polezna studentam i aspirantam razlichnyh fizicheskih i inzhenernyh special`nostej, a takzhe prepodavatelyam i specialistam sootvetstvujushhih oblastej. ····· 10361329
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mechatronics requires the integration of a range of technologies from mechanical engineering, electronics and software, often with conflicting requirements. This problem is particularly complex with respect to the electronic parts of a mechatronics system where there are currently no computer-based tools available to support and assist designers during the early stages of the design process. Recognising this, the work was initially defined and developed based on the decomposition of a mechatronic system using Functional Decomposition and top down approach. This led to the development and implementation of a computer-based system at lower level and which is used to assist in the design of electronic systems. Filter design was chosen as an exemplar for the purpose of demonstrating the approach used. The final part is concerned with the definition of means by the methodology can be linked to other system domains to generate an overall design and to manage the transfer of information, including constraints and conflicts, between levels within the design process by means of a Data Dictionary. ····· 10361287· 1 · ::::: · 39 ·· 40 ·· 41 ·· 42 ·· 43 ·· 44 ·· 45 · ::::: · 46 ·
Affiliate Marketing
AdHoc MeldungenAffiliate & PublisherAdvertiser & MerchantAcademyAntwortenArtikelsucheAdventskalender
AffilitivProduktdatenPreisvergleich
