IPv6中Anycast服务在应用层的分析与设计

IPv6以两种方式提供Anycast服务:一种是将Anycast组成员限制在共享一个地址前缀的特殊拓扑区内;另一个是将Anycast地址表示的共享某个特性的结点组分散在互联网的各个地方,这种方式使得路由表会随全球Anycast组数成比例增长,从而构成了Anycast的扩展性问题。提出了一种在应用层实现Anycast服务的解决方案,此方案不仅解决了Anycast服务的扩展性问题,同时也解决了IP层实现Anycast服务所存在的一些其他问题,如路由表膨胀、TCP通信失败等,同时分析和讨论了该方案的可行性及有效性。     

荷载横向分布计算方法比较分析

荷载横向分布系数是桥梁设计计算的首要任务,关系到结构的安全性和可靠性.通过对一座标准T梁桥的荷载横向分布影响线进行计算,并与试验结果对比,分析了几种横向分布计算方法的区别与联系,总结了各方法的优缺点与适用性.     

缢蛏对60Co-γ辐射致雄性小鼠生殖损伤的修复效应

以清洁级ICR雄性小鼠为实验动物,研究了不同浓度缢蛏对60Co-γ致雄性小鼠生殖损伤的修复作用.测定小鼠体重、睾丸重量、精子密度、精子活力、精子畸变率等指标.实验结果表明:不同浓度的缢蛏均使受辐照小鼠的体重有所回升.一定剂量的缢蛏对受辐照小鼠的精子活力、精子密度有一定的增加.结论是缢蛏对60Co-γ致小鼠生殖损伤具有一定的修复效应.     

年金保险中投保人的最优收益模型

以养老保险中的退休金计划为研究对象,采用曩优化方法对年金保单进行分析,得出了当银行储蓄利率与精算师计算保费的利息相等时,均衡络付养老金是投保人的曩优策略。     

浅论非言语交流在图书馆读者服务工作中的运用

论述了非言语交流的各种特点、内涵,并指出图书馆在读者服务中应科学运用非言语交流技巧,以提高图书馆工作质量,为广大读者提供优质服务。     

Ranking Related Research Papers Based on Citation Graph

Research papers are of great importance for researchers to record and share their ideas, studies and results. Meanwhile, they are the bases for further research work. Finding related research papers is the preliminary of good research. A new method for ranking related research papers is introduced in this paper. Given a set of interested papers, the method proposed in this paper may rank related papers just based on a citation graph by constructing the minimal Steiner trees. The method can work with the existing keyword based methods. Intensive experiments on a specific research topic show that the proposed method provides a different ranking criterion to existing ones, and can effectively retrieve those highly related papers.     

超细活性废胶粉改性沥青的微观结构及其流变性能研究

采用超细活性废轮胎胶粉(UACR)和普通废轮胎胶粉(CR)分别制备了超细活性废胶粉改性沥青(UACRMA)和普通废胶粉改性沥青(CRMA).利用傅里叶红外光谱仪、扫描电镜、光学显微镜和旋转流变仪研究了改性沥青的微观结构和流变特性.结果表明:UACRMA体系中胶粉与基质沥青发生了化学和物理作用,UACR颗粒均匀地分布在基质沥青中,且随着UACR份数的增加,体系逐渐形成网络结构,回弹性能和高温稳定性逐渐增大,界面松弛逐渐减弱;而CRMA体系中胶粉与基质沥青仅发生了物理作用,CR颗粒较大,无法形成网络结构.     

中日通信类专业本科人才培养方法比较与思考

以江苏技术师范学院通信工程专业和日本电气通信大学信息通信系统专业为例,对中日通信类专业本科人才培养方案及教学方法等进行对比分析,为改进教学方法、提高教学效果提供参考.     

Additional Twists of Yarn Produced by System of Compact Spinning with Lattice Apron

Based on the flow simulation in the condensing zone of compact spinning with lattice apron and a bead-elastic rod dynamic model of the flexible fiber,trajectories of fibers with different negative pres...     

New Voronoi Diagram Algorithm of Multiply-Connected Planar Areas in the Selective Laser Melting

This paper studies the practical generation of Voronoi diagrams for multiply-connected planar areas bounded by line segments. The core of the algorithm was calculating Voronoi polygon of every Voronoi object in planar areas independently. The main approach had two steps. The first step was calculating all relevant bisectors of every Voronoi object. The second was combining obtained bisectors into completed Voronoi polygons individually. All code was implemented in Visual C++ platform. The resulting code was extensively tested in real-world data and its practical running time grew only linearly. Three statistical CPU-consumption charts had been drawn with the Voronoi diagrams computation data, and compared with other published codes for computing Voronoi diagrams. The algorithm was applied to compute offsetting of slice area consisting of large-scale line segments for the selective laser melting (SLM) trajectory scanning technology which is a kind of rapid prototyping (RP). The experimental results of offsetting for slice area based on Voronoi diagrams show that the approach is effective and simple for polygon offsetting problems. The method is helpful to those offsetting work and can provide more effective offsetting solution.