This thesis introduces an incentive-based trust model to let wireless spectrum regulation embrace diverse current and future means of implementing cognitive radio.

关键词：认知无线电；信任模型；灵巧规则

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We present several algorithms to draw several of the most common types of graphs. We will provide instruction in the use of Graphviz, a popular open-source graph drawing package developed at AT&T Labs, to execute these algorithms. All figures shown herein were generated with Graphviz.

关键词：图形绘制算法；可视化；绘图软件；应力优化

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We present a method for texture mapping models of indoor environments that starts by selecting images whose camera poses are well-aligned in two dimensions. We then align images to geometry as well as to each other, producing visually consistent textures even in the presence of inaccurate surface geometry and noisy camera poses. Images are then composited into a final texture mosaic and projected onto surface geometry for visualization.

关键词：纹理映射；重建；图像拼接；拼接

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The focus of this thesis is the design of capacity-achieving network codes realizable by modern signal processing circuits.

关键词：通信网络；低复杂度；可容；代码；编程

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We show how to perform TSQR and then reconstruct the Householder vector representation with the same asymptotic communication e_ciency and little extra computational cost. We demonstrate the high performance and numerical stability of this algorithm both theoretically and empirically. The new Householder reconstruction algorithm allows us to design more e_cient parallel QR algorithms, with signi_cantly lower latency cost compared to Householder QR and lower bandwidth and latency costs compared with Communication-Avoiding QR (CAQR) algorithm. As a result, our _nal parallel QR algorithm outperforms ScaLAPACK and Elemental implementations of Householder QR and our implementation of CAQR on the Hopper Cray XE6 NERSC system.

关键词：正交三角矩阵分解；高窄正交三角矩阵分解；householder矢量；householder-QR分解；算法性能成本模型

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This paper presents a study were the Rough Set Theory and Data Mining Technique are applied to the electrical power system. The Data Mining technique classifies the system operation in four possible states: normal, alert, emergency (emergency I and emergency II). The states, that correspond to the normal state can be classified as secure and insecure the remaining ones. In this security studies, the overloads in transmition lines and the violation of the voltage limits are used to classify and rank these contingencies. This technique was applied to the 118IEEE busbar test power network and the results obtained are analyzed. Finally, some conclusions that provide a valuable contribution to the understanding of the power system security analysis are pointed out.

关键词：光机电；电力系统；数据挖掘；粗糙集

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We consider some statistical, algorithmic and robustness aspects of demographic inference from genomic variation data. In particular, we study the problem of determining the historical e ective size of a population from the sample frequency spectrum (SFS), which measures the distribution of allele frequencies in a sample of sequences drawn from the population.

关键词：人口推理；人口学；基因组；统计

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Programmable graphics processing units (GPUs) currently offer the best ratio of floating point computational throughput to price for commodity processors, outdistancing same-generation CPUs by an order of magnitude, which has in turn led to their widespread adoption in a variety of computationally demanding fields. Adapting power system simulations to these processors is complicated by the unique hardware architecture of GPUs, which precludes the usage of direct linear system solvers based on Gaussian elimination. Krylov subspace methods are better suited to the GPU architecture, yet the ill-conditioned nature of power system matrices requires substantial preconditioning to ensure robustness of these methods. To reduce the time spent on preconditioning, we have developed a GPU-based preconditioner designed specifically to handle the large, sparse matrices typically encountered in power system simulations. The preconditioning technique used, based on Chebyshev polynomials, is described in detail, as are the design decisions made in adapting this algorithm to the GPU. Evaluation of the performance of the GPU-based preconditioner on a variety of sparse matrices, ranging in size from 30 x 30 to 3948 x 3948, shows significant computational savings relative to a CPU-based implementation of the same preconditioner and a typical incomplete LU (ILU) preconditioner.

关键词：光机电；电力系统；

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This thesis presents an end-to-end system architecture for online services to provide it's users with a "privacy guarantee". The privacy guarantee as described in this thesis relates to the technological enforcement of the user's privacy policies by these online applications that are otherwise untrusted by the user.

关键词：远程管理；用户隐私；隐私保护

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we present our model for ambiguous fragment assignment for RNA-Seq, which includes the most comprehensive set of parameters of any model introduced to date, as well as various methods we have explored for scaling our optimization procedure. These methods include the use of an online EM algorithm and a distributed EM solution implemented on the Spark cluster computing system. Our advances have resulted in the first efficient solution to the problem of fragment assignment in sequencing.

关键词：片段分配；RNA-Sq测序；高通量测序实验；表达生成模型；期望最大化算法

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