引入大变异策略的蟑螂算法研究

通过模拟蟑螂的觅食行为,提出蟑螂算法(Cockroach SwarmOptimization,CSO),并用于求解组合优化问题.算法充分利用了蟑螂社会的平等特性和群体智慧.大变异策略提高了算法全局搜索和避免陷入局部最优的能力.仿真实验表明CSO算法在求解TSP问题方面优于存在的离散粒子群算法(Discrete Particle Swarm Optimiza-tion.PSO).     

基于动态粒子群优化与K-means聚类的图像分割算法

为了解决K-means聚类算法图像分割质量过度依赖于初始聚类中心选取,且易于陷入局部最优解等问题,提出一种基于动态粒子群优化(DPSO)与K-means聚类的图像分割算法(DPSOK)。通过动态调整惯性系数与学习因子来增强PSO算法的性能;然后计算粒子群适应度方差,找准切换至K-means算法时机;随后,将DPSO输出结果用来初始化K-means聚类中心,使其收敛至全局最优解;最后,通过最小化目标函数的多次迭代,使K-means的聚类中心不断更新,直到收敛。实验结果表明,DPSOK能有效提高K-means的全局搜索能力,在图像分割中它比K-means,PSO获得了更好的分割效果,且与粒子群优化和K-means算法相比,DPSOK算法具有更高的分割质量与效率。     

基于DPSO算法的联合防空调度方案仿真优化方法

联合是现代防空作战的重要趋势,但其效果难以定量计算,当考虑兵力编成、任务指派等离散、受约束的调度参数时,其方案优化更是NP-Hard难题.对此,提出了基于离散粒子群(DPSO)算法的仿真优化方法:利用作战仿真评估方案效能,再利用DPSO算法进行优化.概述了典型联合防空作战过程;建立了轰炸机、地空导弹、雷达干扰机等仿真模型和作战效能评估模型;介绍了DPSO算法的原理和基于DPSO算法的调度优化模型;最后,实例展示了方法的有效性.     

一种基于分布估计的离散粒子群优化算法

 本文提出了一种基于分布估计的离散粒子群优化算法.提出的新算法突破了传统粒子群速度-位移搜索模型的局限,且种群中的每个粒子具有更全面的学习能力,从而能够有效地解决组合优化问题.仿真实验结果表明提出的新算法的性能优于现有的其它几种离散粒子群优化算法.     

参数自适应混沌粒子群算法在盲源分离中的应用

独立分量分析(ICA)是盲源信号分离中应用最为广泛技术,其应用过程需要对目标函数进行优化,传统粒子算法(PSO)对其进行优化时,存在易陷入局部最优、稳定性差等缺陷,针对此问题,提出采用参数自适应混沌粒子群算法对ICA进行优化.首先采用对PSO的参数进行自适应调整,提高粒子的搜索能力,然后对粒子群进行混沌扰动,提高算法收敛速度.仿真结果表明,使用参数自适应混沌粒子群算法可以有效解决ICA的目标函数优化问题,极大提高了盲源信号的分离效果.     

基于PSO的置换流水车间调度算法

置换流水车间调度问题(PFSP)是典型的具有工程背景的组合优化问题.对该问题的研究具有重要的理论意义与应用价值.本文针对PFSP问题提出了新的基于粒子群优化(PSO)的调度算法.论文分析了广义粒子群优化(GPSO)模型中信息流动拓扑结构的缺陷,提出新的基于种群的元启发式算法信息共享机制SISM.基于SISM信息共享机制的PSO调度算法利用PFSP问题的邻域知识指导个体的局部搜索.与历史文献中该问题的代表性算法比较,该算法可在调度质量与计算费用之间获得较好的平衡.仿真实例验证了该调度算法的有效性.     

基于多策略离散粒子群算法的MPRM电路延时与面积优化

针对大规模混合极性Reed-Muller(Mixed Polarity Reed-Muller,MPRM)逻辑电路的延时与面积优化,提出一种基于多策略离散粒子群优化(Multi-Strategy Discrete Particle Swarm Optimization,MSDPSO)的极性搜索方法.在MSDPSO算法中,对粒子进行团队划分,每个团队既执行不同策略,又相互联系,并行完成探索与开发的双重任务.同时在进化过程中采用高斯调整来激活寻优能力较差的粒子.结合MSDPSO算法和列表极性转换技术,对大规模MPRM电路进行延时与面积极性搜索.最后对PLA格式的MCNC Benchmark电路进行算法性能测试,结果验证了MSDPSO算法的有效性.与离散粒子群优化(Discrete Particle Swarm Optimization,DPSO)算法的优化结果相比较,MSDPSO算法获取的电路延时平均缩短8.43%,面积平均节省38.36%.     

CDMA系统粒子群多用户检测算法

Kennedy和Eberhart提出的粒子群优化算法(PSO),作为一种新的并行优化算法,在解决多维和非线性的复杂问题中,性能优良且算法简单易于实现。本文对二进制粒子群优化算法进行改进,并将其应用于DS-CDMA通信系统的多用户检测中,提出了基于矢量的二进制粒子群多用户检测器(V-BPSO-MUD),同时提出了两种高效实用的多用户检测器:基于矢量的串行二进制多用户检测器(VS-BPSO-MUD)及基于矩阵的二进制多用户检测器(M-BPSO-MUD)。仿真结果表明,PSO多用户检测器充分利用了粒子群优化算法的优良特性,性能明显优于传统的CDMA检测器,接近无多址干扰情况。     

求解多输入多输出检测新算法——遗传粒子群优化

设计两种基于粒子群优化算法(PSO)和基于遗传算法(GA)的多输入多输出(MIMO)系统检测算法.提出一种新的融合GA和PSO进化机制的遗传粒子群进化(GPSO)算法,并将其应用于MIMO系统检测问题求解.新算法改善了初始化种群,并将每一代粒子划为精英粒子、次优粒子和糟糕粒子三部分,对这三种粒子分别采用极值扰动、PSO...     

FBG非均匀应变分布的动态粒子群算法重构研究

基于动态粒子群算法(DPSO)和传输矩阵法,提出了一种新的光纤布喇格光栅(FBG)轴向非均匀应变分布重构方法.利用光栅轴向采样点处的应变值作为粒子,让其在解空间中模拟鸟群行为进行搜索,算法的惯性权重ω根据不同粒子与当前种群中全局最优粒子距离的大小进行动态调整,加快了算法收敛到最优点的速度.采用DPSO对线性、二次、正弦、不连续等4种应变分布形式进行了应变重构,并与量子行为粒子群优化算法(QPSO)的重构结果进行了比较,仿真结果表明,DPSO优化算法可有效地进行光栅轴向菲均匀应变分布的重构,精度和迭代速度较QPSO法有显著提高.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.