提高Web信息检索精度的多步策略

Internet的普及和发展 ,使互联网中的信息量与日俱增 ,人们普遍采用搜索引擎进行各种信息检索 ,但效率及精确度偏低 .从用户的角度及检索机制上 ,比较客观地分析了目前造成这种现象的原因 ,并从多方面给出了提高信息检索精度的几种策略 .实验结果表明 ,检索效果有一定的提高     

一类带有因病死亡率的SIS流行病积分模型的分析

本研究一类带有因病死亡率的SIS流行病积分模型，得到地方病平衡点存在的阈值，当该阈值小于1时，无病平衡点是全局吸引的，当该阈值大于1时，给出了地方病平衡点局部稳定的充分条件。     

我校教务管理网络化现状及思考

教务管理网络化是提高教务管理的必由之路。结合菏泽师范专科学校实际情况 ,对该校教务管理实现网络化 ,以及对具体实现网上成绩查询、计算机排课、网上课表查询、网上选课等多方面进行了探索和实践。     

光脉冲在不连续光波导中的传播

在时域内应用慢包近似（ＳＶＢＡ）的方法，对光波导内光波传输的时域计算做了简化．应用该方法计算了不连续光波导中光脉冲的传播，得到波导不连续处的传输情况．文中应用的计算方法可以大大节省计算机的内存，节省计算时间，是进行时域计算的一种行之有效的方法     

克林贝格螺旋锥齿轮重迭系数的计算方法

研究并推导出了克林贝格螺旋锥齿轮副重迭系数的计算方法。     

CUIT∶ 一个通用界面工具箱的设计

用面向对象的方法，为满足不同窗口环境下界面的通用性，设计了一个通用界面工具箱ＣＵＩＴ     

Studies on a series complexes of copper (II), zinc (II), cobalt (III) with Schiff base derived fromd-glucosamine and salicylaldehyde

Copper (II) zinc (II) cobalt (III) complexes with the Schiff base derived from salicylaldehyde andd-glucosamine were synthesized. These compounds abbreviated as SG, CuSG, ZnSG, CoSG were characterized by elemental analyses, IR, UV-Vis,¹H NMR and MS spectrum. ESR spectrum, magnetic susceptibility measured by Evans method for CuSG had also been done. It is suggested that the complexes in solution have pseudotetrahedral structure. It was found that SG would occur a photochemical reaction if a beach of 355 nm ultravisible light shone on its aqueous solution. The reaction was in further research. Supported by the National Natural Science Foundation of China Ye Yong: born in 1970, Ph. D graduate student     

Studies on the reaction between Laccase ando-methoxyphenol by microcalorimetry

The reaction between Laccase ando-methoxyphenol have been studied by LKB-2107 batch microcalorimetry system. Thermodynamic parameters Δ _r H _m , ΔG _o , ΔG _T ^≠ and kinetic parameters (K _m ,k ₂) have been determined. The process of the reaction has been analyzed from changes in energy by using the transition state theory. Two methods for enhancing catalytic power of Laccase are proposed. The results shown that formation of an enzyme-substrate complex is “anticatalytic”. The enter and sole source of catalytic power is the stabilization of transition state; reactant-state interactions are by nature inhibitory and only waste catalytic power. Supported by the National Natural Science Foundation of China Wang Tianzhi: born in 1968. Ph D     

Binding Sites of La~(3 ) on Camodulin

ＢｉｎｄｉｎｇＳｉｔｅｓｏｆＬａ３＋ｏｎＣａｍｏｄｕｌｉｎ＊ＦｅｎｇＹｕｐｉｎｇ（冯玉萍），ＹｕａｎＨａｏｄａｎ（袁浩丹）＋，ＺｈｏｕＹｕｘｉａｎｇ（周玉祥）＋，ＮｉｎｇＹｏｎｇｃｈｅｎｇ（宁永成），ＺｈａｎｇＲｉｑｉｎｇ（张日清）＋Ｄｅｐａｒｔｍｅ...