合并后的高校图书馆文献资源建设的思考

分析了高校合并后图书馆文献资源建设的优势以及面临的问题,提出了加强文献资源建设的对策。     

线图的邻域完整度的界

利用图的边邻域完整度，讨论了其线图的邻域完整度的界，得到了以下主要结果：①设口(G)为图G的边独立数，则VNI(L(G))≤β(G)；②对于任意连通图G，有VNI(L(G))≥ENI(G)-1，且此下界可达到。     

EYS, encoding an ortholog of Drosophila spacemaker, is mutated in autosomal recessive retinitis pigmentosa

Using a positional cloning approach supported by comparative genomics, we have identified a previously unreported gene, EYS, at the RP25 locus on chromosome 6q12 commonly mutated in autosomal recessive retinitis pigmentosa. Spanning over 2 Mb, this is the largest eye-specific gene identified so far. EYS is independently disrupted in four other mammalian lineages, including that of rodents, but is well conserved from Drosophila to man and is likely to have a role in the modeling of retinal architecture.     

DGW-1导弹模拟训练系统

以某型号弹道导弹模拟训练系统的研制为背景,提出了系统设计的总体思想。该系统采用了最先进的分布式仿真技术,其中应用计算机网络、图形处理和数据库中间件技术解决了系统庞大,操作训练岗位多,信号分析、处理复杂,需要对三维图形进行时实处理等难点问题,为其他网络仿真系统的研制提供了有效的设计手段。     

XML在分布交互作战仿真中的应用

通过对XML数据标准在分布交互式作战仿真系统中数据表示、处理、传输等方面应用的讨论，探讨了XML数据交换格式和作战文书的XML表示形式，以及在HLA／RTI仿真体系结构下，应用XML数据描述的基本方法，从而提出了一种基于XML数据表示标准的分布交互仿真支撑框架体系结构、本文讨论的部分内容已在某中等规模的作战仿真系统中初步实现，这样为大规模分布交互式作战仿真系统研究与建设提供了可借鉴的开发原型。     

Interfacial morphologies between iron and Ag-Cu-Sn alloy

A series of experiments have been designed to investigate the effect of different space positions between liquid Ag-Cu-Sn alloy drop and iron substrates on the liquid/solid inter-facial morphologies by a sessile drop method. The results show that Ag-Cu-Sn alloy diffuses into the solid iron substrate, and the amounts are greater and the distances are longer when it diffuses into the lower substrate than that into the upper one. Moreover, there are many primary α-Fe dendrites in the liquid Ag-Cu-Sn alloy close to the upper substrate of liquid bridge or the surface of metal drop. That is due to the effect of gravity.     

传感器网络中一种能量高效的数据收集算法

为了在无线传感器网络中降低能耗和最大化网络生存期,提出一种能量高效的数据收集算法(energy efficient data gathering algorithm, EEDGA)。该算法利用移动代理模型在网络中进行数据收集。首先,EEDGA根据监测精度的要求控制活动节点的数量;然后,通过求最小支配集得到具体的工作节点;最后,利用蚁群算法规划移动代理迁移的最优路线,移动代理以渐进方式收集活动节点的监测数据。仿真结果表明,与典型算法相比,该算法具有更低的能耗和更长的网络生存期。     

Speleothem Mg,Sr and Ba records during the MIS 5c-d,and implications for paleoclimate change in NE Sichuan,Central China

Trace metals of Mg, Sr and Ba in a stalagmite (SZ2) collected from Suozi Cave in NE Sichuan, Central China, were analyzed with ICP-AES. The stalagmite was dated to have developed between 120 and 103 ka BP. Results indicate that the Mg/Ca, Sr/Ca and Ba/Ca ratios of SZ2 varied between (9500-14700) 10 6 , (54-123) 10 6 and (31-82) 10 6 , respectively. The three records displayed significant millennial scale variations, which correlate with changes in past climate and environment. Lower values of Mg/Ca ratios and higher values of Sr/Ca and Ba/Ca ratios of SZ2 occurred during relatively cold-dry marine isotope stage (MIS) 5d, while the opposite trend was observed during relatively warm-humid MIS 5c. Trace metals in speleothems can be affected by distribution coefficients or trace metal concentrations in solutions from which speleothems precipitate. Temperature is suggested to be the dominant controller of Mg/Ca ratios in SZ2, whereas the Sr/Ca and Ba/Ca ratios may have been influenced by surface soil and atmospheric dust activities and prior calcite precipitation in Suozi Cave. Further investigations are warranted as to whether Sr/Ca and Ba/Ca ratios were affected by temperature and growth rate of the speleothem. The shifts of Mg/Ca, Sr/Ca and Ba/Ca records in SZ2 during the transition from MIS 5d to 5c apparently were earlier than the oxygen isotope record ( 18 O) of the same stalagmite. This possibly indicates (1) that atmospheric dust activity (the mechanism affecting SZ2 Sr/Ca and Ba/Ca ratios) is closely related to temperature, and (2) that temperature changes (dominated by solar insolation) precedes change in speleothem 18 O records which are controlled by both summer monsoons and winter temperatures.     

光声成像技术在鸣禽脑中的应用

鸣禽鸣啭学习与记忆机制的研究是当今神经科学领域的一个特色分支,近年来该研究迅猛发展.光声成像是一种新型无损脑功能成像技术.该文首次采用光声成像技术对鸣禽斑胸草雀脑进行研究,以期为揭示鸣禽鸣唱机制提供新的手段.     

一种基于DTRS模型与α-正域的邮件过滤方法

提出一种基于决策粗糙集(decision-theoretic rough set,DTRS)模型的邮件过滤方法(spam filtering based on DTRS-SFDTRS).首先用α-正域约简理论对邮件数据进行属性约简,然后根据最小风险Bayes决策方法,将无法明确判断的邮件用DTRS模型的边界域进行刻画,实现正常邮件、垃圾邮件和可疑邮件的三枝决策.仿真实验表明:SFDTRS方法能显著降低数据的维度,保证邮件过滤效果的同时,提高模型训练和邮件过滤的效率.