数字图书馆与知识产权问题的研究

从数字图书馆与知识产权的概念、数字图书馆的建设和数字图书馆的合理使用等 几个方面对数字图书馆建设中的知识产权保护问题进行了探讨与分析。

     

蛋白质组学研究现状及我国研究实力

以SCIE数据库为资料来源,统计1998-2005年蛋白质组学研究 论文的高产国家、机构、发表论文期刊及文献主题等相关指标,揭示蛋白质组学的研究现状 ,并对论文数量和影响力进行比较,以衡量我国在蛋白质组领域的研究实力。

     

Pile Foundation Analysis Using a Boundary Element Method

Taking the extended Mindlin solution of a vertical point load acting in the interior of a multi layered elastic medium as the basic solution, an indirect boundary element method (BEM) was adopted to analyze pile foundations embedded in a multi layered elastic soil. The numerical analysis was carried out by the compiled program for a pile foundation in an homogeneous soil and a pile foundation in a multi layered soil. Reasonably good agreement is obtained between the present and existing solutions. Compared with the FEM software ABAQUS, the computational speed of BEM is much faster than that of FEM. Applying BEM in practice is convenient. It is pointed out that the exact measurement of elastic modulus is the key factor for applying BEM in geotechnical engineering.     

An algorithm of symbol timing rapid acquisition and tracking for π/4 DQPSK signals

Methods of IF difference detection combined with rapid acquisition synchronization and tracking principle by parallel processing methods were proposed in order to quickly achieve synchronous digital capture and tracking in π/4 DQPSK demodulation.Field program grid array (FPGA) technology to achieve rapid detection of synchronous capture and symbol tracking was adopted by using the improved algorithm in parallel with signal acquisition and frequency offset acquisition. This adoption took into account the characteristics of π/4 DQPSK and was in accordance with the detection of rapid acquisition synchronization and the tracking principle. The experimental results show that clock synchronization signals can be restored stably in eight symbol bit, accurately realize bit timing, and possess strong anti interference capability without affecting frequency differences. This proposed algorithm is suited for frequency hopping communication systems with high transmission rates.     

Tests and analysis on energy consumption of heating ventilating and air conditioning systems in commercial buildings

Three typical commercial buildings in Chongqing, P.R. China were selected to study the actual summertime operation and energy situations of heating ventilating and air conditioning (HVAC) systems in commercial buildings. Based on tests of energy consumption of HVAC systems in these three buildings, we analyzed the electricity consumption of the main components of the air conditioning systems. The energy efficiency of the chillers and air conditioning water distribution systems were studied. The indoor thermal environment in these three buildings were also tested and discussed. It is concluded that problems exist in the air conditioning systems of commercial buildings. Among the problems are over sized system design, low equipment operating efficiencies, poor operation management, and lack of indoor temperature controls. To reduce energy consumption of HVAC systems in commercial buildings, we propose energy efficient strategies such as sizing systems based on accurate load calculation and automatic control under partial load conditions.     

A controller area network based electric vehicle drive system design

To solve the key problems of the electric drive system, a controller area network(CAN) based electric drive system for electric vehicles was designed. The system was composed of two parts: a CAN communication module and a motor control module. The newest transceiver (TJA1040) and a stand alone CAN controller were used during the design of the CAN communication module, and anti jamming measures were employed to guarantee communication stability. The fuzzy vector control method and direct speed control were applied to realize highly robust control functions. This system has high compatibility. It can be installed in electric vehicles as an independent module and be extended through CAN Bus.      

株血清学和免疫学特性的研究

 在鸡胚肾细胞上对HN₉₉株病毒进行了克隆纯化，经检测无外源病原污染。应用血清交叉中和试验确定了IBV HN₉₉株的血清型，并用免疫保护试验进行了验证，结果证明HN₉₉株与T株属同一血清型，与TJ、SD、湖北等地方分离株有一定的相关性。不同免疫剂量的效力试验结果表明用0.2 ml剂量的HN₉₉灭活苗接种试验鸡，能够对HN₉₉攻毒提供100%的保护，证明HN₉₉株具有良好的免疫原性。     

两阶段聚类分析在烤烟外观质量评价中的应

应用两阶段聚类法对云南省大理州14个主栽烤烟品种C3F和C3L 2个等级的中部烟叶外观质量进行聚类分析，并应用多元方差分析对聚类效果进行了检验。结果表明，产地和品种对烤烟外观质量的影响较小，并将100 个烤烟样品外观质量分为3 个类型；明确了各类型烟叶外观质量的重要性状、变异特点和类型间的分类特性；其聚类分析结果与烤烟外观质量的实际表现相吻合，因而两阶段聚类分类结果客观、合理、准确、可靠。     

基于WebPAC的图书馆信息资源整合与揭示

阐述了基于WebPAC的信息资源整合的现实意义、发展趋势和优势，归纳了基于WebPAC整合信息资源的实用技术方法。     

基于倍四元数和Groebner基的6R机械手的位置反解

提出了一般6R机械手的位置反解的新算法,该算法是把齐次变换矩阵转以倍四元数形式表示,建立了倍四元数形式的串联6R机械手运动学方程,再通过线性消元和两次应用分次字典序Groebner基消去5个变元,得到一个一元16次方程.此方法没有增根,是一种对空间任意尺寸6R机械手进行建模和求解的新算法.其中求解Groebner基采用了计算机代数系统进行有理数运算,目前的求解速度尚不是很高,需进一步改进.