Connection Management Protocols for Dynamic Lightpath Provisioning in Future WDM Networks

This paper investigates and compares the performance of two GMPLS-based distributed control and management protocols for dynamic lightpath provisioning in future IP networks. The first protocol is a global information-based link state approach that consists of both an integrated RWA algorithm and a signaling algorithm. Two triggering mechanisms for the LSAs update procedures are considered; one is periodic-based and the other is threshold-based. The second protocol is a local-information based fixed alternate link routing approach where the signaling protocol is closely integrated with the RWA protocols.     

基于ε逼近算法的CDMA盲自适应多用户检测

把码分多址通信系统的盲多用户信号检测问题转化为一个带约束的二次规划问题，利用二次规划问题的ε逼近算法给出了一种新的CDMA盲自适应多用户检测方法，仿真结果表明，该算法不但具有较强的多址干扰抑制性能，而且具有很快的收敛速度。对于时变信道特别适用。     

VRP的数学模型及算法分析

随着我国物流业的飞速发展,车辆运输路线规划对于降低物流成本显得越来越重要。对车辆路线问题（VRP）进行了数学建模,总结了国内外的研究状况,并指出了今后的研究方向。     

Comparison of energy intake prediction algorithms for systems powered by photovoltaic harvesters

Small size photovoltaic modules can harvest enough energy to power many personal devices and wireless sensor nodes. The prediction of solar energy intake is possible thanks to the periodical availability of the sunlight and its cyclic behavior. Thus, smart and innovative power management strategies can take advantage from intake prediction algorithms to optimize the energy usage by keeping the system in low power state as long as possible. On the other hand, very accurate predictions need time and energy because of complex calculations, thus an algorithm that can provide the optimal trade-off between computational effort and accuracy is a breakthrough for systems with tight power constraints. In this paper we introduce an innovative, efficient and reliable solar prediction algorithm, the weather conditioned moving average (WCMA). The algorithm has been further enhanced to increase performance using a phase displacement regulator (PDR) which reduces the average error to less than 9.2% at a minimum energy cost. The proposed new algorithm compares favorably with several competing approaches.     

用DCG制作全息显示屏的工艺研究

本文对应用ＤＣＧ制作全息显示屏的工艺进行了实验研究,从中比较出最佳的制版工艺,优选出满足课题要求的拍摄光路,并讨论了后处理工艺对全息显示屏质量的影响,最后还提出了一些尚待解决的问题。     

HDTV中MPEG-2实时解码器的错误处理实用新算法研究

论述了国内外高清晰度数字电视中的ＭＰＥＧ－２实时解码器的错误处理的研究现状及其典型算法,提出了错误处理实用新算法的研究思路。算法研究与ＨＤＴＶ视频解码器硬件研制紧密结合,为国家重大项目－ＨＤＴＶ功能能样机研制直接提供算法支持。     

场致发射显示器技术分析

本文给出了场致发射显示器的基本工作原理,性能优势和应用前景。对目前的发展状况及研究,生产中的主要关键技术进行了分析。     

基于遗传算法的HMM最小错识率训练方法

最小错识率（MCE）HMM训练方法是最直接的判决训练方法之一,原理上比最大似然接方法优越得多。但是,充分发挥MCE的性能的困难在于如何将非连续的经验错识率估计映射成连续的代价函数以便采用梯度搜索技术之类的忧化方法。本文所提出的基于遗传算法的最小错识率方法（GAMCE）不但可避免MCE的缺点,而且在原理上可求得全局最优解。实验结果表明,GA_MCE比MCE好得多。     

时隙式随机争用多址系统分析方法研究

本文给出一种新的平均周期分析方法,并对时隙式随机争用多址系统进行了分析,得到了系统的信息分组发送成功的平均长度公式、信息分组发生碰撞的平均长度公式和空闲时隙的平均长度公式,并在讨论了系统的冲突分解特性后,给出了系统的吞吐量。     

Genetic algorithm‐based scheduling in cognitive radio networks under interference temperature constraints

The proliferation of wireless technologies and services has intensified the demand for the radio spectrum. However, the currently existing fixed spectrum assignment policy leads to an inefficient and unevenly distributed spectrum utilization. Cognitive radio paradigm has been proposed to alleviate these drawbacks by employing dynamic spectrum access (DSA) methodology. Federal Communications Commission (FCC) has proposed the interference temperature model, which enables the unlicensed users to utilize the licensed frequencies simultaneously with the licensed users as long as they conform to the interference temperature constraints. Recently, throughput and delay optimal schedulers that meet the interference temperature constraints in cognitive radio networks have been formulated in the literature. However, these schedulers have high computational complexity. In this paper, we propose genetic algorithm (GA)‐based suboptimal methods addressing these throughput and delay optimal scheduling problems. The simulation results corroborate that our GA‐based approach yields very close performance to the optimal solutions and operates with much lower complexity. Copyright © 2010 John Wiley & Sons, Ltd.