UTRAN系统中LCS的实现方法

介绍LCS和UMTS网络架构的基础上,分析了LCS在无线接入网UTRAN系统中的结构,并探讨了UTRAN的定位过程和定位方法.     

Analysis of retailers’ coalition stability for supply chain based on LCS and stable set

To attain the general form of stable coalition structure, this paper addressed the problem of retailers’ coalition stability in a two-stage supply chain consisting of one supplier and multiple retailers. A profit gain function was established via introducing market gain coefficient and coalition cost coefficient for different coalition structures. Based on the function, the profit of each retailer in all kinds of coalition structures was analysed, and the general feature of a stable coalition structure was attained by the largest consistent set method and the stable set method. Furthermore, some insights were obtained. For example, stable coalition structures are equidistributed or approximate equidistributed; with supplier’s cost increasing, the size of the retailers’ coalition increases. Finally, the above conclusions are verified by numerical simulation. The results of this paper provide a reference for retailers’ coalition in a supply chain, such as automobile or Information Technology supply chain.     

基于学习分类器的自主地面车在狭隘环境中的路径规划

提出了一种基于学习分类器(LCS)的避碰路径规划方法,设计了集成适应度函数,在确保安全避碰的前提下,解决自主地面车(ALV)在狭隘环境下的路径优化问题.不同环境的仿真实验结果表明,遗传算法和学习分类器结合用于自主地面车的路径规划是收敛的,提高了ALV在狭隘环境中快速发现安全路径的能力.     

基于多LCS和人工势场法的机器人行为控制

基于遗传算法的早熟收敛、局部最优解、占据较大的存储空间等缺陷,提出了一种基于多LCS和人工势场法的机器人行为控制方法,设计了特殊的适应度函数。不同算法的仿真实验结果表明多LCS和人工势场法相结合用于机器人行为控制是收敛的,很大程度上改善了遗传算法的早熟收敛和收敛速度慢等问题。     

改进的LCS方法在测试脚本序列比对中的应用

在自动化测试中,需要对录制和回放过程中的请求序列进行解析和比对,帮助用户进行脚本的修正和完善。为了实现请求序列的比对,采用最长公共子序列(LCS)算法对录制和回放的序列进行比较,其核心思想是把序列对比转化成图论问题,通过二维矩阵寻路来找到最优的匹配方式。文中对算法的原理和实现做了详细描述,并对算法的性能进行测试和分析,最后将算法应用到软件脚本修改器中,验证算法在自动化测试实际应用中的效果。结果表明,LCS算法可以高效地对序列进行解析和比对,提高了自动化测试的效率。     

Preparation of Neodymium-Doped Yttrium Aluminum Garnet Transparent Ceramics by Homogeneous Precipitation Method

Neodymium-doped yttriumaluminumgarnet(Nd∶YAG)transparent polycrystalline ceramics,laser ce-ramic matrix materials,are gradually becomingsubsti-tutes for single crystals because they are provided withpredominantly chemical stability,highly doped ionconcentration,excellent optical performance and hightemperature stability[1,2].Presently,the conventionallyused methods to produce Nd∶YAG powders are solid-state processes[3],chemical precipitation methods[4,5]andlowtemperature combustiontechniqu…     

4G网络中位置服务业务解决方案

本文讨论如何综合考虑4G网络不同发展时期的网络特点和位置服务方案,给出在4G网络中部署位置服务增值业务解决方案的建议。     

基于智能天线的TD-SCDMA系统LCS平台研究

从无线定位业务的应用前景出发,结合TD-SCDMA系统采用智能天线的特点,提出了一种方位测量定位法(AOA)和圆周定位法(TOA)的混合定位法,并给出了基于该定位法的无线定位平台的体系结构,而且还对该系统的基本运作机制作了简要的阐述。     

Synthesis of Neodymium-Doped Yttrium Aluminum Garnet (Nd∶YAG) Nano-Sized Powders by Low Temperature Combustion

The homogeneously dispersed, less agglomerated (Nd0.01Y0.99)3Al5O12 nano-sized powders were synthesized by the low temperature combustion (LCS), using Nd2O3, Y2O3, Al(NO3)3·9H2O, ammonia water and citric acid as starting materials. This method effectively solves the problems caused by solid-state reaction at high temperature and hard agglomerates brought by the chemical precipitation method. The powders were characterized by TG-DTA, XRD, FT-IR, TEM respectively and the photoluminescence (PL) spectra of (Nd0.01Y0.99)3Al5O12 green and sintered ceramic disks were measured. The results show that the forming temperature of YAG crystal phase is 850 ℃ and YAP crystal phase appearing during the calcinations transforms to pure YAG at 1050 ℃. The particle size of the powders synthesized by the LCS is in a range of 20～50 nm depending on the thermal treatment temperatures. The effectively induced cross section (σin) with the value 4.03×10-19 cm2 of (Nd0.01Y0.99)3Al5O12 ceramics is about 44% higher than that of single crystal.     

字符串相似度度量中LCS和GST算法比较

就字符串相似度度量算法的LCS和GST在概念、实现、效率方面进行比较分析,简要探讨了两种算法的应用领域.