教育领域中的一个服务应用：基于SOA的学分银行系统

The paper presents a new service application in education area,namely credit bank.Credit bank is a service provided by authorized education organizations so that customers can save,manage and exchange education credits.The paper focus on establishing a service oriented information system to support the idea of credit bank.After introducing its concept,the paper studies the requirement of credit bank from both business and technical point of view.Then it presents a practical step-by-step guideline to identify services in the system.The guideline is applied to design credit bank information system(CBIS)as a case study.The contributions of the paper are:(i)It gives a new idea about how service can be used to benefit education;(ii)It presents a useful method for service identification in system design with case Study.     

风电场无功补偿装置的优化配置分析

正大规模风电场并入电网将对电力系统的安全性及稳定性造成较大的影响。其中,风电场公共连接点(PCC,Point of Common Coupling)区域的电压质量下降问题尤为突出。由于风电场并网后,系统无功潮流将发生变化,系统电压也会受到相应的影响。     

教育领域中的一个服务应用:基于SOA的学分银行系统①

The paper presents a new service application in education area, namely credit bank. Credit bank is a service provided by authorized education organizations so that customers can save, manage and exchange education credits. The paper focus on establishing a service oriented information system to support the idea of credit bank. After introducing its concept, the paper studies the requirement of credit bank from both business and technical point of view. Then it presents a practical step-by-step guideline to identify services in the system. The guideline is applied to design credit bank information system (CBIS) as a case study. The contributions of the paper are: (i) It gives a new idea about how service can be used to benefit education; (ii) It presents a useful method for service identification in system design with case study.     

带记忆信息的协同进化算法

本文提出了一种带记忆信息的协同进化算法--将种群划分为一个子种群和多个独立的个体,协调算法的局部与全局搜索能力;独立个体中适应度最高的个体与子种群进行交叉与合并,实现种群内部的协作与更新;利用子种群内个体间的相似性,选择有代表性个体进行多次变异,发现有利于提高个体适应度的重要基因位来引导该子种群的变异行行为。实验表明,本文算法能够快速找到高精度的数值解,性能稳定且易于实现。     

万能成型机架在改造悬臂机组中的应用

介绍了万能成型机架的特点及其在φ５０机组改造过程中的具体应用，改造后的机组其成型质量及生产钢管的精度均比改造前要高，对钢管生产过程中的技术改造有一定的指导意义。     

铌微合金化对高铁车轮钢奥氏体形核和长大的影响

 针对碳质量分数为0.47%中碳高铁车轮钢,研究了铌微合金化对前驱体为铁素体-珠光体的组织发生奥氏体逆相变的影响。结果表明,铁素体-珠光体钢的逆相变是一个由碳原子扩散控制的过程,奥氏体优先在珠光体内的铁素体与渗碳体（α/Fe3C）片层界面处形核,并且沿平行于珠光体片层方向的长大速率比垂直于珠光体片层方向更快。含铌车轮钢细化的珠光体组织可以提高奥氏体的形核率,有利于细化奥氏体晶粒。随着再加热温度的提高,含铌车轮钢的奥氏体混晶温度（960 ℃）比不含铌的钢高80 ℃,因此通过铌微合金化可扩大再加热奥氏体化温度窗口。结合Thermal-Calc热力学计算和透射电镜分析,铌在中碳钢中主要以析出物的形式存在,析出钉扎作用是其细化奥氏体晶粒、推迟混晶现象出现的主要机制。