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The densest local packings of N three-dimensional identical nonoverlapping spheres within a
radius Rmin(N) of a fixed central sphere of the same size are obtained for selected values of N up to N = 1...
A Tractable Approach to Coverage and Rate in Cellular Networks
Coverage Rate Cellular Networks
2010/11/29
Cellular networks are usually modeled by placing the base stations on a grid, with mobile users either randomly scattered or placed deterministically. These models have been used extensively but suffe...
Supersymmetric Extension of Non-Hermitian su(2) Hamiltonian and Supercoherent States
pseudo-Hermitian quantum mechanics supersymmetry supercoherent states
2010/12/16
A new class of non-Hermitian Hamiltonians with real spectrum, which are written as a real linear combination of su(2) generators in the form H = ωJ3 + αJ− + βJ+,α 6= β, is analyzed.
Throughput Analysis of Buffer-Constrained Wireless Systems in the Finite Blocklength Regime
Buffer-Constrained Wireless Systems Finite Blocklength Regime
2010/12/7
In this paper, wireless systems operating under queueing constraints in the form of limitations on the buffer violation probabilities are considered. The throughput under such constraints is captured ...
Joint Relay Selection and Link Adaptation for Distributed Beamforming in Regenerative Cooperative Networks
relay selection link adaptation distributed beamforming signaling throughput
2010/11/26
Relay selection enhances the performance of the cooperative networks by selecting the links with higher capacity.Meanwhile link adaptation improves the spectral efficiency of wireless data-centric net...
We define the derived category of a concrete category in a way which extends the usual definition of the derived category of a ring, and we prove that the boundedbelow derived category of SpecM0 (an a...
统筹城乡发展的重要环节——壮大县域经济
统筹城乡发展 县域经济 协调发展
2009/12/1
县域经济在整个国民经济中具有基础性地位，加快县域经济发展步伐，对于繁荣农村经济，推动城乡经济的协调发展，全面建设小康社会具有特殊重要的意义。县域经济的顺利增长，有赖于充分利用城乡经济优势的互补功能，取决于最大限度地发挥农村经济的聚集效应和城市经济的扩散效应。因此，大力发展农村商品经济，协调工农关系，统筹城乡经济社会发展是县域经济发展的根本任务。
关于堆排序的一种新型算法
新型算法 堆排序
2009/10/26
In this paper, a new algorithm of heapsort, called second order heapsort, is suggested. It is proved that the average time complexity of the algorithm is O(n log2 n) and the speed of the algorithm, wh...
基于模块性指标的动态网络社群结构探测方法
动态网络 社群结构 模块性
2009/9/27
针对节点增加的动态网络,提出一种对应的动态网络社群结构探测算法CD(Community Structure Detection Algorithm for Dynamic Networks).CDD算法依据节点加入引起模块性指标变化的情况,对网络节点进行社群划分, 从而可以发现网络社群结构随时间的动态变化过程.利用计算机生成数据、Ucinet和Pajek提供的有关网络数据,通过社群结构探测试验表明...
群体思维收敛性定量验证
群体思维 综合集成 收敛性
2009/9/27
本文证明当专家数足够多的时候,加权几何平均综合判断矩阵与加权算术平均综合判断矩阵都
依概率收敛到客观排序向量,从而从数学上解释和验证了群体思维具有收敛性,这对钱学森先生提出的
综合集成研讨厅理论具有一定的理论价值.
群组AHP判断矩阵的一种有效集结方法
层次分析法 群决策 综合判断矩阵 集结
2009/9/27
针对群决策中判断矩阵的集结问题,提出了一种基于m 阶简单无向连通图理论的正互反型判
断矩阵的集结方法. 在给出了该算法的具体步骤的同时,通过算例分析,说明了该方法的实施过程及其
有效性.