georouting and delta gathering efficient data propagation techniques for geosensor networks

MULTI - SCALE INTEGRATED ANALYSIS OF AGROECOSYSTEMS - CHAPTER 1 potx

Ngày tải lên : 11/08/2014, 21:21

... have been made to publish reliable data and information, but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use Neither ... defined on different dimensions and scales (why?)” and “we cannot handle uncertainty and ignorance just by using bigger and better computers (why?)” in the 1970s and 1980s have been sanguinary ... preoccupation for nonrenewable fossil energy has a long history) Jevons’ point was that more efficient engines would expand the possible uses of coal for powering human activities, and therefore, they...

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channel adaptive technologies and cross layer designs for wireless systems with multiple antennas

Ngày tải lên : 01/06/2014, 07:54

... Slot Queue and Packet Queue 312 8.4 Fairness Notions 312 8.4.1 Effort Fair and Outcome Fair 312 8.4.2 Fairness Notions for Wireline Networks 313 8.4.3 Fairness Notions for Wireless Networks 314 ... explosion of demands for applications over the ﬁxedline and broadband Internet access, there is a parallel development in the wireless domains to support high-quality and high-speed data and multimedia ... and performance measure (as illustrated in Figure P.2) For example, the physical layer is responsible for the reliable and efﬁcient delivery of information bits The MAC layer is responsible for...

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Báo cáo hóa học: " Adaptive selection of antenna grouping and beamforming for MIMO systems" ppt

Ngày tải lên : 20/06/2014, 22:20

... transmission methods, and one data stream of 16-QAM for the beamforming mode The proposed mode selection performs better Kim et al EURASIP Journal on Wireless Communications and Networking 2011, ... solid lines are for an IID channel and the dashed lines are for a highly correlated channel As in Figures and 5, the performance of mode selection is the best By examining Figure and the condition ... grouping and beamforming for MIMO systems EURASIP Journal on Wireless Communications and Networking 2011 2011:154 Endnote a In this article, the beamforming mode refers to the transmit beamforming...

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Báo cáo hóa học: " Vector perturbation based adaptive distributed precoding scheme with limited feedback for CoMP systems" docx

Ngày tải lên : 21/06/2014, 03:20

... attention in wireless sensor networks [4-7] and relay cooperation networks [8-10] In this literature, vector perturbation is a popular and efficient technique for distributed beamforming scheme to mitigate ... Feedback information Feedback bits MBSFN One PMI for K BSs C WLP One PMI for each BSs One phase facor for coordinated BSs C + (C + 1) × (K - 1) ADP One PMI for serving BSs One adjustment factor for ... One-Bit Feedback Algorithm for Distributed Beamforming, in WCNC, 2010 IEEE, pp 1–6 Z Yi, R Adve, L Teng, Beamforming with limited feedback in amplify-andforward cooperative networks IEEE Trans Wireless...

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Báo cáo hóa học: " Research Article Capacity Performance of Adaptive Receive Antenna Subarray Formation for MIMO Systems" pdf

Ngày tải lên : 22/06/2014, 06:20

... each subarray is formed using a predefined and fixed number of antenna elements (let it be k j antenna elements for the jth subarray) Therefore, a capacity bound for antenna subarray formation can ... Therefore, the entries of the transformation matrix A will be j = MT l 1+ ρ kj × − MR −k j norm criterion We first develop the algorithm for SS-ASF and then provide extensions for RS-ASF and RHC-ASF ... derived Section presents an analytical algorithm for ASF and its extensions for several ASF schemes The capacity performance of the technique and the proposed algorithm is demonstrated in Section...

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Báo cáo hóa học: " Research Article Channel Impulse Response Length and Noise Variance Estimation for OFDM Systems with Adaptive Guard Interval" docx

Ngày tải lên : 22/06/2014, 22:20

... information of CIR length for both the receiver and the transmitter to adjust the GI length adaptively Moreover, the estimated noise variance can be used for generation of the channel state information ... baseband Inverse fast Fourier transform Insert adaptive guard interval Digitalanalog converter Mobile channel Noise + Received bit sequence Demodulator in baseband Equalizer Fast Fourier transform ... length information from the receiver to the transmitter However, for network working in time-division duplex (TDD) mode, the estimated CIR length for the downlink channel is equivalent to that for...

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Báo cáo hóa học: " A Reconﬁgurable Spiral Antenna for Adaptive MIMO Systems" docx

Ngày tải lên : 23/06/2014, 00:20

... radiate right-hand and left-hand circularly polarized axial beam waves with good axial ratio and gain values covering the design frequency bandwidth of 4.3–5.4 GHz If desired, this bandwidth can ... Theory and Techniques, and Communications Societies J Y Qian received a B.S degree in optoelectronics and an M.S degree in optics from the University of Science and Technology of China, in 1994 and ... Accordingly, right- and left-hand circularly polarized (RHCP and LHCP) radiation is achieved In Figure 2, for the clarity of illustration, each conﬁgured geometry is depicted separately and actuators...

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Báo cáo y học: "Networked Research buffering: a basic mechanism for distributed robustness in complex adaptive systems" pptx

Ngày tải lên : 13/08/2014, 16:20

... requests for tasks in the Z functional group have increased and requests for tasks of type X have decreased Thus resources for X are now in excess While no agent exists in the system that performs ... local functional redundancy and distributed forms of robustness in biology Degeneracy may be an important causal factor for both of these forms of robustness Edelman and Gally have presented considerable ... the ligands available for complex formation Each protein is presented with the same well-mixed concentrations of ligands A phenotype that has unused proteins is energetically penalized and is...

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agent-based model selection framework for complex adaptive systems

Ngày tải lên : 13/11/2014, 11:02

... algorithmic coding theory, for selecting among alternative models of land-use and land-cover change I demonstrate the method’s adequacy using both artiﬁcial and real land-cover data in multiple experimental ... rows and columns, respectively, in the following order: random, ignorant, uninformed and informed 96 xvi 5.2 Confusion matrices, using the ERR criterion, for two error functions and ... two suitability conditions Generating and candidate classes are in rows and columns, respectively, in the following order: random, ignorant, uninformed and informed 98 5.3 The...

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Dynamic scheduling techniques for adaptive applications on real time embedded systems

Ngày tải lên : 10/09/2015, 15:52

... divided into mandatory and optional parts, e.g m4 and o4 For clarity purpose, this is not shown in (a) 5.3 48 (a) Graph decomposition illustration for a Note ... Transform (DWT), which encodes an image into multiple subbands so that a lower frequency subband contains a ﬁner frequency resolution and a coarser time resolution At the decoder, as more data ... abstraction levels, performance enhancements based on the static design and aim at coping with the CHAPTER Introduction Fig 1.2: Aircraft pitch performance for controller task level and execution environment...

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Design of adaptive and hybrid energy QOS aware heterogeneous multiprocessor scheduling strategies for embedded systems

Ngày tải lên : 04/10/2015, 15:44

... dissertation First and foremost my supervising Professor, Dr Bharadwaj Veeravalli, for his guidance and valuable inputs throughout my research term His patience and understanding during certain ... HA for agreeing to be my examiner and appraise this dissertation I would also like to thank Mr Goh Lee Kee and Mr Sivakumar, both from the Institute for Infocomm Research (I R) Singapore, for ... user-interface tool Specifically, Mr Goh Lee Kee for his efforts in widget development as well as algorithm integration and Mr Sivakumar for guidance and feedback during the development phase This...

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people are never satisfied

Ngày tải lên : 04/10/2012, 10:24

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A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems

Ngày tải lên : 20/11/2012, 11:28

... new pilot pattern and corresponding channel estimation method and data detection for OFDM systems over fast fading channels have been proposed The proposed channel estimation and data detection ... The waveform of Gk ( w) The transmitted signals for the k1-th subcarrier and k2-th subcarrier in frequency domain are therefore X i ,k1 Gk1 ( w) and X i ,k2 Gk2 ( w) , respectively, and satisfy ... analysis for the proposed fast LMMSE algorithm 72 3.5 Numerical and Simulation Results 75 3.6 Conclusion 81 Chapter 4: Channel estimation and data detection for OFDM...

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Free Software tools for embedded systems

Ngày tải lên : 20/10/2013, 00:15

... GNU C library (glibc) Designed for performance compliance with standards Best for servers and desktops uClibc Highly compatible, but implemented for small embedded systems with little storage space and RAM Others: diet libc, newlib, klibc ... (building gcc twice: once for gcc + once for compilers that need the C library) Lots of decisions to make (such as C library version and configuration for your platform) Need kernel headers and C library sources ... License: LGPL C library from the GNU project Designed for performance, standards compliance and portability Found on all GNU / Linux host systems Quite big for small embedded systems: about 1.7 MB on ...

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techniques for adaptive control - vance vandoren

Ngày tải lên : 12/12/2013, 22:42

... Cataloging-in-Publication Data Techniques for adaptive control / edited by Vance J VanDoren p cm Includes bibliographical references and index ISBN 0-7506-7495-4 (pbk : alk paper) Adaptive control systems I VanDoren, ... difficult for an adaptive controller to choose its control efforts so as to avoid the constraints of the process; that is, the maximum and minimum values allowed for the control efforts and the ... new information to the input/output data that every controller collects anyway It certainly organizes the raw data into a convenient form from which a control law can be 14 Techniques for Adaptive...

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Tất cả

Tài liệu C Programming for Embedded Systems docx

Ngày tải lên : 22/12/2013, 02:17

... C Program 54 Chapter Data Types and Variables 57 Identifier Declaration 59 Special Data Types and Data Access 59 Function Data Types 60 The Character Data Type 60 Integer Data Types 61 Byte Craft's ... instructions and data are stored There is a single internal data bus that fetches both instructions and data Page 24 Harvard architecture computers have separate memory areas for program instructions and ... locations with opcodes, and then branch to them! •Since Harvard machines have an explicit memory space for data, using program memory for data storage is trickier For example, a data value declared...