für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Future wireless networks will be driven by various ubiquitous broadband services such as portable telephony, mobile Internet, Voice over IP, and IPTV. To accommodate a single cell`s large number of users, each running a different application on its mobile terminal, optimization of limited resources is critical. The transmission path from the base station to the mobile terminal is the downlink. In the downlink, feedback of mobile user`s condition to the base-station is essential for optimal allocation of limited resources, however, it is a system design challenge. Mobile user`s condition is comprised of its wireless channel condition, among multiple other such system metrics. This book explores optimal resource allocation, with partial knowledge of a mobile user`s condition at the base station. It shows the right feedback information is application dependent. The set of techniques explored improve the performance and bandwidth efficiency of future wireless systems. The work should be very useful to industry professionals in wireless networks, academicians - professors or graduate students or anyone else with an interest in wireless communications. ····· 10361102945
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Brushless permanent magnet (PM) motors can be divided into the PM synchronous AC motor (PMSM) and PM brushless DC motor (PMBDCM). The former has sinusoidal airgap flux and the back EMF, thus has to be supplied with sinusoidal current to produce constant torque. The PMBDCM has the trapezoidal back EMF, so the rectangular current waveform in its armature winding is required to obtain the low torque ripple. Generally, the magnets with parallel magnetization are used in the PMSM while the magnets with radial magnetization are suitable for the BDCM. The interior PM (IPM) synchronous machine is being studied as a promising candidate for high-power starter/alternator in future internal combustion engine vehicles. The other many popular applications of IPM machine are traction, machine tool, spindle drives, air conditioning compressors and electrical vehicles. Torque ripple minimization in PM motors is conventionally obtained by either good motor design or appropriate control strategies. In design optimization programs, a reliable and detailed analysis of the torque and back-EMF of the machine should be performed. ····· 10361102898
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polymeric insulators for outdoor use have become increasingly important and are expected to dominate in the future HV-outdoor applications. It has been reported that the polymeric insulators have performed better than porcelain and glass in laboratories and outdoor test sites. In this book a few kinds of binary and ternary blends of SIR, EPDM & PE with many different proportion were prepared and consequently the mechanical, electrical, environmental, rheological and dynamical properties and morphological behavior of them have been studied. Finally the best ternary blend have been selected and optimized for all properties requirement and economical point of view which should be especially useful to electrical insulation manufacturers or anyone else who may be considering the usefulness of polymeric insulators. ····· 10361102882
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book investigates the performance of point-to-point wireless ad hoc networks. Approaching the design of these networks through the medium access control (MAC) layer, analytical expressions are derived for the outage probability, which is defined as the probability of receiving messages erroneously. Moreover, the impact of various ad hoc network characteristics (such as fading and bounded region) is investigated. Having established an understanding of the behavior of ad hoc networks, we propose MAC layer techniques to improve the performance. Three schemes are proposed: 1) optimization of the sensing threshold in CSMA, 2) enhanced decision making ability of CSMA, and 3) introduction of bandwidth partitioning. Finally, we step into the domain of multiple input multiple output (MIMO) communications. The performance of MIMO networks with no transmitter channel state information (CSIT) is analyzed, and different transmission schemes are proposed to achieve the best usage of transmit antennas. With the addition of CSIT, we consider various interference management schemes, and propose a distributed binary power control scheme that ensures an increase in the sum rate of MIMO networks. ····· 10361102808
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Wireless sensors nodes with a single accessing from one AP (access point) to another have addressed the usefulness of these sensors in sending and retrieving data. This book has tested different wireless techniques for biological sensor networking by reporting the advantages and the disadvantages of these techniques in monitoring the body temperature. The founding addressed that ZigBee platform provides a high communication performance for wireless monitoring systems. The proposed circuit is helping on generating early warnings from the received signals of the patient body. Moreover, the proposed circuit has the ability to determine the patient`s temperature in real-time status inside the hospital. This book also stated the hardware and software requirements of the proposed wireless body temperature monitoring based on ZigBee wireless, AT89C52 micro-controller, and temperature sensor (100K6A1A) for serving the biomedical needs. Finally, the proposed design has achieved acceptable performance in terms of temperature accuracy (±0.3 °C), maximum indoor coverage range (49 m), and 100% efficiency in multi-tag communications. ····· 10361102801
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Owing to the superparamagnetic effect (SPE), areal storage densities achievable by today`s magnetic recording technologies are limited to around 500-800 Gbits/in2. In the past few years, the industry has managed to overcome the SPE barrier for more storage capacity. Thermal-assisted atomic force microscope (AFM) based data storage is a new attractive potential solution to supersede magnetic hard disks. This book familiarizes readers to this new data storage technology. Thermal transport in the AFM based data storage system is one of the key factors affecting this technology to successfully transfer to commercial products. Thus the emphasis of this book is placed on the issue of thermal transport in the system using atomic/molecular scale simulations. To cater the need of readers from multidisciplinary background, a large number of references have also been included in this book, which have more detailed discussion of this active research field. We hope this book would provide useful information to all those interested in the new data storage technology, and contribute to parts of its further development. ····· 10361102785
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The last ten years in power electronics have seen only minor changes and novelty in the field of converter topologies. On the other hand, developments in power semiconductors have been tremendous. Using new state of the art components, traditional topologies can be used more efficiently and for much higher power levels. The recent efforts in the field of semiconductors are especially interesting for high power and high voltage applications, where the voltage blocking capability of components has always been a major issue. In order to achieve the needed voltage blocking capability traditionally many low voltage components are connected in series but, as a result, the number of components and the complexity of a system will increase, which reduces the efficiency and overall reliability of the converter. Using new high-voltage IGBTs the efficiency and power density of converters and thus, the feasibility of the whole system can be enhanced. This book has presented a theoretical and practical knowledge base with detailed analysis of state of the art issues and technology trends related to rolling stock converters with high-voltage IGBTs. ····· 10361102760
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The development of accurate and reliable security systems is a matter of wide interest, and in this context biometrics has seen as a highly effective automatic mechanism for personal authentication. Many research groups are working on the development of the different authentication systems such as the fingerprint, iris, hand, palm print etc. by using biometrics. The palm print is the first defining characteristics and natural method to be used for recognition. Moreover, ease acceptance and non invasive nature as compared to other biometric traits make it a preferable trait to be used for authentication.In this book, an automated approach to palm print recognition has been developed and discussed. Particular emphasis has been given to the alignment method, for which a new alignment algorithm has been proposed. The proposed system is reliable and user friendly as it is developed in LabVIEW 6i. The availability of datalog files in LabVIEW makes it one of the most promising candidate for its usage as a database. ····· 10361102667
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Analog circuit design based on partially-depleted (PD) Silicon-on-Insulator (SOI) MOSFET requires body-contacted devices in order to avoid floating body effects and the resulting body voltage mismatch. In this book, a simple and high performance diamond-shaped body contact (DSBC) for PD SOI devices is presented. Two and three-dimensional device simulation are used to demonstrate the performance functionality of the body contact. DSBC devices are designed using standard layers in 0.35 micron PD SOI MOSFET process. Experimental characterization of the fabricated DSBC structures confirms the efficiency of the new contact in floating body suppression and current drive capability. The new body contact structure is applicable to both low- and high-voltage SOI and bulk devices. ····· 10361102600
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Always the instant of image is a common challenge in most of experiments and it is a major factor in the imaging techniques, where the subjects have fast movement, in these cases a synchronization between the event and image capture will be needed. In the HPV-1 high speed video camera the camera chip based on In-situ Storage Image Sensor technique, which allows the camera to store a whole video sequence inside the imager, wherein every image pixel has a line of 103 storage pixels adjacent to it and an overwriting pixel at the end of the storage elements to drain the old image when the storage area is filled. When the camera working with one million frames per second (1µs exposure time), the challenge is that, the maximum time available to sense the event and generate a triggering signal to stop the overwriting mechanism is 100µs. This book describes how we overcome this challenge by three designs of trigger systems One Pixel Camera Trigger System , Light Barrier Trigger System and Smart Camera Trigger System , and gives some ideas for other designs to those students and electronics engineers who are interesting to build their own triggering systems. ····· 10361102540
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Implementation of an Iterative Feedback Tuning (IFT) and Myopic Unfalsified Control (MUC) Algorithm is investigated. The Motorola DSP56F807C and ARM7024 microcontrollers are selected for use in the investigations due to their matching characteristics with the requirement of the two algorithms. Speed of program execution, large memory, in-built ADC and DAC and C compiler type are the key parameters qualifying their usage. Myopic Unfalsified Control (MUC) is noted to be similar to IFT since it also employs `myopic` gradient based steepest descent approach to parameter optimization. It is easier to implement in that its algorithm is not as complex as the IFT one. ····· 10361102474
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book provides theory and applications of the Fourier-Bessel (FB) decomposition. It includes separation of components of multi-component non-stationary signals by using the FB expansion. The relation between the frequency and the order of the FB expansion coefficients has been developed. The components which are disjoint in the frequency domain, can be separated using the FB coefficients. If the components are disjoint in the time-frequency domain, the time-order representation based on the FB expansion is used to separate the components. It also covers some of the real-time applications of the FB decomposition like speech formant separation, bat echolocation signal components separation, amplitude and frequency modulated (AM-FM) signal separation and segmentation of electroencephalogram (EEG) signal. ····· 10361102461
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This research describes the development of giant magnetoresistive (GMR) sensors with multilayered magnetic nanowires containing alternating ferromagnetic and nonmagnetic layers. Pulsed electrochemical deposition was used to control the periodic structure of multilayered nanoscale nanowires with preferential crystalline orientation. Co/Cu multilayered magnetic nanowires were grown through polymer nanopore membrane on substrates by lithography-assisted template bonding (LATB) method. Layer thicknesses and crystalline structure were varied and controlled to have an effect on the GMR results. Measurements and results of embedded GMR sensors in a prototype motor are also presented. ····· 10361102452
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Increase in energy demand has not only exerted substantial pressure on Nepal`s limited forest resources but also has a negative effect on its environment and economy. Nepal has no fossil fuel of its own and all requirements have to be imported. Renewable options, such as wind, solar power, are not technologically ready for mass dissemination. The use of micro hydroelectricity is, therefore, the most promising option for remote hill communities in Nepal for the foreseeable future. MHPP is the best alternative for providing power to those isolated rural villages of Nepal. Seeing this many institution are directly involved within this sector making the marketing prospects even more promising. This even assisted in the expansion of power market to those areas where the national grid has not been extended. With this in view this study has tried to cover some of the burning issues related with the energy market and proper regulation of the market with proper regulation and supply of power. Talking about market both internal and external this study tried to short out all the problems related with both of them. It also analyze the institutional set up and government policies. ····· 10361102366
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The impact of wireless communication on our everyday life is of major significance. Wireless communication, despite the hype of the popular press, is a field that has been around for more than hundred years, starting around 1897 with Marconi`s successful demonstrations of wireless telegraphy. Rapid progress in technology has also been around for quite a while. Wireless communication without any doubt is a paradigm shift, enabling multimedia communications between people and devices from any location. In an evolving Wireless World, there is demand of systems that possess great engineering challenge. It can be met only with efficient, reliable and robust Multi-user Wireless systems. This text emphasizes the Opportunistic Communication: a most recent technique used for enhancement of wireless systems performance in many ways. The book highlights the salient features of Opportunistic Communication and its benefit for utilizing it in Multiuser Scenarios. The book also covers advance topics such as Multiple Input Multiple Output (MIMO) Systems, Multiuser Diversity, Multiuser Beamforming and its exploitation in throughput enhancement of Wireless Networks. ····· 10361102351
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Recently, MIMO systems have been considered in wireless communication systems to increase the capacity. Linear Dispersion Codes are one group of Space-Time Codes with different design methods which are used in MIMO systems. Among them, PSBLLSTCs can provide various data rate and reliable performance in uncorrelated channels. In this book, the influence of unavoidable correlation in MIMO channels on the performance of PSBLLSTCs is studied. It is shown that by applying the optimal phase shifts among transmitted symbols in one layer or between different layers, performance degradation can be reduced. It has also been shown that the optimal phase shifts achieved for uncorrelated systems would not change in presence of correlation. In studying the performance of PSBLLSTCs, high decoding complexity of Maximum Likelihood detection was noticed. In this book, the method of Polar Sphere Decoding is exploited to simplify the decoding process and to provide the possibility of using Sphere Decoding in non-lattice configuration at the receiver side for PSBLLSTCs. It is presented that this decoding process is more than 6 times faster in comparison with ML decoding process. ····· 10361102320
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the past decades,the issue of low frequency oscillations has been of major concern to power system engineers.These oscillations range from 0.1 to 3Hz and tend to be poorly damped especially in systems equipped with high gain fast acting AVRs and highly interconnected networks.If these oscillations are not adequately damped,they may sustain and grow, which may lead to system separation and loss of power transfer.As a means to alleviate such problems of low damping in power systems,Power System Stabilizer (PSS) has been proposed.PSS produces a component of the electrical torque in phase with the rotor speed deviations,thus adding damping to the generators rotor oscillation.Results obtained in this work could be improved by carefully tuning the PSSs by including small and large disturbances conditions, within the objective function. It was found that a high gain value of the PSS slightly negatively affected the initial oscillations after the fault application. The initial oscillations have higher amplitudes due to the high gains. It is also suggested that the optimal locations of the PSS be considered within the optimization, especially for a Multi-machine systems. ····· 10361102237
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The purpose of this project is to design, build and evaluate a compressor circuit that could be controlled manually. Compressor circuit is designed to avoid the output sound signal clipping (distortion). In order to design a system that could prevent the sound signal wave distortion, the definition of sound control desk (channel strip) and compressor circuit had to be researched. To get the best performance from any recording or transmission medium requires that some passages that are close to the maximum permissible level, and that they may momentarily or unpredictably exceed it. In such cases, the danger of frequency distortion is replaced by controlled (and usually less noticeable) distortion of dynamics. After most corrections have been made manually, the few that remain can be cleaned up` automatically by a compressor or by its more extreme form, limiter. ····· 10361102234
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Radio over Fiber (RoF) technique combines high capacity of optical fiber and mobility of cellular radio system for next generation speedy networks due to well known advantages like ultrahigh bandwidth, elimination of frequency congestion, low transmission loss, low power consumption and mobility to serve both fixed and mobile users. A bidirectional SCM-ASK model for RoF communication system that incorporates optical mm-wave generation and wavelength reuse for uplink connection has been proposed in this work. For short and medium distance RoF system, various parameters such as laser source power level (in dBm), laser linewidth (in MHz), number of RF channels and their frequency spacing, EDFA gain and power and MZM bias and modulation voltages should be carefully chosen for achieving minimum bit error rate (BER) and high Q-factor. A RoF system having 2-10 km radius (micro/macro cells) give excellent performance in the improvements of BER as well as Q-factor. ····· 10361102230
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents another approach of implementing quality of service (QoS) differentiation in physical layer, particularly the optical domain. Spectral amplitude coding techniques of optical code division multiple access (OCDMA) was used as the means of differentiating signal quality based on bit error rate. This approach is not a complete alternative to the current network layer QoS. However, it is believed that algorithm complexity in the higher layer can be reduced by implementing QoS provisioning at the prescribed bit level. Practical application of the proposed OCDMA codes as the add-drop multiplexer has enabled signal dropping based on different service requirements. There is a thorough explanation which includes mathematical analysis, software simulation and hardware experiment to support the feasibility of implementation of the proposed techniques. ····· 10361102180
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the recent years, Process control systems have found application in many new areas. Integration of knowledge from Computational Intelligence, Telecommunication and Microarchitectures, has led to evolution of many different flavors of process control like Distributed Control System (DCS), Supervisory Control and Data Acquisition System (SCADA) etc. This book describes development of SCADA system for Heating Ventilation and Air Conditioning System. Introduction of Process control logic in a HVAC system helps to optimize its power consumption. SCADA system described in this book is based on an actual project undertaken in 2009 at GIK Institute, Pakistan. HVAC system discussed comprises of 100HP Electrical load and 250 tons of air conditioning load. Effectiveness of introduced SCADA system can be judged by the saving rate of 96% at a negligible operational cost of 3%. Discussed SCADA system is based on innovative use of readily available components for inexpensive development. This text should be particularly helpful for those who are considering customized development of a process control system. ····· 10361102153
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Advanced optical modulation and multiplexing techniques have become a key ingredient to the design of modern WDM optically routed networks. This book, reviews the generation and detection of multigigabit/second intensity- and phase modulated formats and highlights their resilience to key impairments found in optical networking, such as optical amplifier noise, chromatic dispersion, WDM crosstalk and fiber nonlinearity. A novel multiplexing technique, namely Absolute Polar Duty Cycle Division Multiplexing (AP-DCDM) which is based on the polar signaling and different return to zero (RZ) duty cycles is reported for high speed optical fiber communication systems. Unlike all the other techniques, in AP-DCDM different users share the communication medium to transmit in the same time period and at the same carrier wavelength, but with different duty cycles. The unique duty cycle for each channel helps to regenerate data at the receiver ····· 10361102152
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Scalable video coding schemes are intended to encode the signal once at available highest resolution, frame rate and quality, but enable decoding from partial streams depending on specific rate and resolution required by applications. The 3D discrete wavelet transform, due to its multiresolution nature, is highly suitable for the scalable video compression. The computational complexity of the architecture is one of the major bottleneck for realization of scalable video coding along with conventional scalability functions. This research focuses on reducing the computational complexity of motion estimation in motion compensated temporal filtering (MCTF) framework and also extends the system to support region of interest scalability. ····· 10361102107
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray People initially used system like SCADA and PLC`s for home,industrial automation purposes and for security applications, but for today`s world when people want access and monitoring from remote location, mobile networks can be a good option. This work is for design a low cost system which use a mobile phone (particularly SMS service of GSM)to monitor temperature from a remote location. To achieve the objective a micro controller-based sms module is designed to interface a mobile phone via serial cable to form a wireless temperature monitor system. SMS is used to interact with the mobile phone which in turn interacts with the module. The module connected to a temperature sensor which is used to acquire temperature information, the module sends temperature information to remote user via SMS. Here the module GSM mobile- micro-controller interface system utilized the existing GSM`s SMS service with low-cost hardware equipment to create a system for remote monitoring. For communication between mobile and micro-controller here AT commands (specified by Standard GSM 07.05) are used. The system can be monitored via SMS from anywhere that is covered by GSM service. ····· 10361101928· 1 · ::::: · 22 ·· 23 ·· 24 ·· 25 ·· 26 ·· 27 ·· 28 · ::::: · 46 ·
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