báo cáo hóa học:" Research Article Secure Collision-Free Fre

Báo cáo hóa học: " Research Article Secure Precise Clock Synchronization for Interconnected Body Area Networks" doc

... Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011, Article ID 797931, 14 pages doi:10.1155/2011/797931 Research Ar ticle Secure Precise Clock Synchronization for Interconnected ... operly cited. Secure time synchronization is a paramount service for wireless sensor networks (WSNs) constituted b y multiple inter connected body area networks (BANs...

Ngày tải lên : 21/06/2014, 05:20

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báo cáo hóa học:" Research Article Optimization of Sensing Receiver for Cognitive Radio Applications" docx

... sensing. The total time to perform a discrete Fourier Transform (DFT) is given by T DFT = 1 F DSP  4N log 2 N − 6N +8  ,(3) where F DSP is the DSP operating frequency. For simplicity, assume that ... appropriate channel for CR operation (i.e., increases). Similarly, the physical implementation is mostly deﬁned by the user given restrictions on cost, power, performance, and so forth. F...

Ngày tải lên : 21/06/2014, 20:20

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Báo cáo hóa học: " Research Article Improved Intra-coding Methods for H.264/AVC" docx

... total number of the encoded frames is 100 for each test sequence. Hadamard transform is enforced on these video frames. 8 ×8 transform is not chosen. As for the entropy coding, the CAVLC (context-based ... substitute for H.264 DC intraprediction mode with no need to code side information. However, prediction performance would be degraded if directly using previously reconstructed pixels...

Ngày tải lên : 21/06/2014, 22:20

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Báo cáo hóa học: " Research Article Centroid Localization of Uncooperative Nodes in Wireless Networks Using a Relative Span Weighting Method" pot

... Journal on Wireless Communications and Networking Volume 2010, Article ID 567040, 10 pages doi:10.1155/2010/567040 Research Article Centroid Localization of Uncooperative Nodes in Wireless Networks ... the REWL mechanism with λ = 0.15 performs better than the other algorithms for all numbers of receivers. In order to gauge the performance of REWL (λ = 0.15) for a single frequen...

Ngày tải lên : 21/06/2014, 23:20

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Báo cáo hóa học: " Research Article A Multifunctional Reading Assistant for the Visually Impaired" docx

... orientation, illumi- nation, zoom factor, and so forth. However, this fact that seems so obvious for most of people is not natural and easy for blind people. For them, taking a picture requires training (a) ... (especially for the text detection part). Nevertheless, the extension to another currency is quite straightforward and may be handled eas- ily. An all-currency recognizer has n...

Ngày tải lên : 22/06/2014, 19:20

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Báo cáo hóa học: " Research Article Selective Iterative Waterﬁlling for Digital Subscriber Lines" docx

... the performance of CO line on the high- frequency band. Therefore, for RT line, allocating all the re- maining power over the high -frequency band is a smart strat- egy to enhance its performance ... high -frequency band is not used by 3000 ft lines and protective low waterﬁlling level is not necessary to en- sure the performance of 3000 ft lines on the high -frequency band. Therefore,...

Ngày tải lên : 22/06/2014, 20:20

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Báo cáo hóa học: " Research Article Secure Arithmetic Coding with Error Detection Capability" ppt

... lengths of the forbidden symbols Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2010, Article ID 621521, 9 pages doi:10.1155/2010/621521 Research Article Secure Arithmet ... more than one forbidden symbol, therefore we use two forbidden symbols in this method. Since the sum of the probabilities of two forbidden symbols must be equal to γ,wecandivide the...

Ngày tải lên : 21/06/2014, 11:20

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Báo cáo hóa học: " Research Article Secure and Efﬁcient Protocol for Vehicular Ad Hoc Network with Privacy Preservation" doc

... a certificate before the use of a public key for signature verification. It takes 4 PM for certificate verification and 2 PM for message verification, resulting in a total of 6 PM for signature verification ... the proposed protocol drop messages for a smaller number of vehicles; for example, 190 vehicles for ECPP and 100 vehicles for the proposed protocol. However, as for GSIS an...

Ngày tải lên : 21/06/2014, 11:20

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Báo cáo hóa học: " Research Article Secure Clustering and Symmetric Key Establishment in Heterogeneous Wireless Sensor Networks Reza Azarderskhsh and Arash Reyhani-Masoleh" pdf

... on Wireless Communications and Networking Volume 2011, Article ID 893592, 12 pages doi:10.1155/2011/893592 Research Article Secure Clustering and Symmetric Key Establishment in Heterogeneous Wireless ... IEEE Std.802.15.4 for Information Technology—Telecommu- nication and Information Exchage between Systems—Local and Metropolitan Area Networks Speciﬁc Requirements Part 15.4: Wi...

Ngày tải lên : 21/06/2014, 11:20

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báo cáo hóa học:" Research Article Secure Collision-Free Frequency Hopping for OFDMA-Based Wireless Networks" docx

... in Signal Processing Volume 2009, Article ID 361063, 11 pages doi:10.1155/2009/361063 Research Article Secure Collision-Free Frequency Hopping for OFDMA-Based Wireless Networks Leonard Lightfoot, ... system design using secure dynamic spectrum access control. First, we propose a collision-free frequency hopping (CFFH) system based on the OFDMA framework and an inno...

Ngày tải lên : 21/06/2014, 20:20

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