管网方程Jacobi矩阵的一维压缩存贮与管网图节点标号的优化

利用大型稀疏矩阵的处理技术,用一维数组压缩存贮管网方程F(H)=0的Jacobi矩阵J(H),并应用图论方法进行管网图节点标号的优化,以节省管网分析计算所需的计算机存贮量及计算时间.     

微机辅助电路稳态分析

本文根据线性电路各种模型的拓扑参数及元件数参,较全面地分析了直接生成增广节点方程的原理和方法。并运用稀疏矩阵技术,使相应的一般线性电路稳态分析的机辅分析,占有较少的计算机内存。因此,本程序适用于使用微型计算机,对包含各种元件的较大规模的线性电路进行稳态分析。     

Construction of a genetic map with SRAP markers and localization of the gene responsible for the first-flower-node trait in cucumber (Cucumis sativus L.)

Cucumber (Cucumis sativus L.) is an annualclimber originated from the tropic rain forest area inthe south of Himalayas, which belongs to the Cucur bitaceae family. Cucumber is one of the importantvegetables in the world, and its planting area is sec ond only to that of tomato[1]. However genetics re search on cucumber obviously drops behind that of thelatter. The classic genetic map of cucumber, with sixlinkage groups, is composed of more than 100 genesfor color, morphology, and dise…     

Construction of a genetic map and localization of QTLs for yield traits in tomato by SSR markers

Using an F2 population derived from the hybrid of Lycopersicon esculentum Mill. ‘XF 98-7’× Lycopersicon pimpinellifolium LA2184, a SSR genetic linkage map of tomato is constructed. The map contains 112 markers and spans 808.4 cM with an average distance of 7.22 cM between loci. Two quantitative trait loci (QTLs) for first flower node on chromosomes 5 and 11, two QTLs for number of flowers per truss on chromosomes 2 and 5, and five QTLs for fruit weight on chromosomes 1, 2, 3, 9 and 12 are identified.     

基于DHT的P2P网络资源定位模型研究

目的分析和讨论目前流行的P2P网络模型,探讨基于DHT(Distributed Hash Table)的资源定位方法,提出一种改进的kademlia模型。方法将虚拟节点引入结构化P2P系统,对P2P网络节点进行筛选以提高网络运行效率,使之能自适应地进行网络规模调整,在拓扑形成时充分利用网络访问的区域性和物理网络中节点的邻近特性降低访问延迟和路由长度。结果模拟测试表明模型在路由选择和访问延迟方面的表现均优于原Kademlia算法。结论改进后的模型继承了DHT和Kademlia的优点,有助于改善P2P网络的可扩展性和可管理性,优化路由,减少网络开销,从而提高网络资源的利用率,适合面向Internet规模的文件共享、协同工作等P2P应用。     

A Layered Zone Routing Algorithm in Ad Hoc Network Based on Matrix of Adjacency Connection

The hybrid routing protocol has received more attention recently than the proactive and the reactive, especially for large-scale and highly dynamic connection, in mobile ad hoc network. A crucial reason is that zone-layered is being utilized in the complex systems. A hybrid routing algorithm which is layered zone based on adjacency connection（LZBAC） is put forward under the background of a few members in network with steady position and link. The algorithm modifies storage structure of nodes and improves routing mechanism. The theoretical analysis and simulation testing testify that the algorithm costs shorter time of route finding and less delay than others.     

一种面向进程通信的逻辑网络信息平台(NIP)的设计

本文通过对现有网络体系结构和应用系统开发的分析，提出了一种面向高层应用进程通信的逻辑网络信息平台NIP，以实现异构网络中不同进程（同一机器内、不同机器中）间信息透明传输，并给出了NIP的具体设计方案。     

基于主动网络技术的在线拍卖

为了解决系统客户／服务器（C／S）结构网络在线拍卖的不足，提出了一种基于主动网络技术的网络在线拍卖结构。在主动节点上安装过滤器，过滤低竞争价格，提高拍卖服务器的处理性能；在重负载的情况下实现了负载动态平衡。服务器以主动信包的形式向主动节点发布最新竞价，减少网络延迟。仿真实验表明：该结构不仅较好地解决了传统网络结构在线拍卖系统的不足，同时在性能方面也有所提高。     

机械驻波中的能流分布图象

通过张力作功的正负值与能流方向间的关系,证明驻波中的能量并非静止不动,而是在波腹与波节问作周期性的往复流动。     

中晚期食管癌手术方式的探讨—附96例报告

报道１９８９－１９９１年，共手术治疗中晚期食管癌９６例，肿瘤切除率９１．６％，术后并发症发生率１１．４％，无手术死亡。笔者认为胸段食管癌采用经左胸切除，胃经食管床重建食管术有许多优点，值得采用。而残胃食管癌或估计肿瘤切除困难的病人，可采用胸骨后结肠代食管术，再经右胸切除食管。对本组食管癌国际ＴＮＭ分期与淋巴结转移的关系也作了分析探讨。