图书管理系统的设计与应用

结合图书馆信息化发展趋势,对图书管理系统的功能特点进行了总结,并详细介绍了图书管理系统的设计与应用.     

“二三结合”开发模式渗流特征研究

L油田B区块开展"二三结合"实验区,"二三结合"开发模式渗流特征对区块的合理高效开发具有重要意义。为了明确其渗流特征,利用油藏数值模拟软件Eclipse建立代表意义的油藏数值模型,研究区块"二三结合"开发模式下原射孔层和补孔层的渗流特征,分析了"二三结合"开发模式下,不同开发阶段综合含水率、采出程度、井底压力、地层压力及含水饱和度的变化特征。研究表明,"二三结合"开发模式先通过水驱开发挖潜原射孔层剩余油,提高厚油层顶部剩余油的采出程度,再通过聚合物驱进一步提高开发效果,通过水驱与聚驱的综合作用,最终得到较好的开发效果。     

高速电主轴热特性仿真与实验研究

对高速电主轴温度场分布随转速的变化规律进行了研究。通过在外壳上布置一定数量的温度传感器,对不同转速下的外壳温度进行实时测量,并将实验结果与ANSYS的模拟结果进行对比,验证了采用在电主轴外壳上布置多个测点测量与仿真相结合的方法来预测电主轴内部温度场分布的可行性;另外还分析了在不同转速下,高速电主轴关键部位的温升,仿真结果表明:主轴在6000~10000 r/min时,温升呈线性增加,在大于10000 r/min后,温升以指数规律增加。     

后基因组研究对社会和生活的影响

文章从基因研究的概念界定入手，揭示了其对人类社会生活的影响。     

一种消费者品牌偏好的模糊排序方法

为将消费者对品牌属性的模糊评判信息转化为消费者的品牌偏好信息,首先将模糊语义转化为三角模糊数,然后利用模糊数的广义加法、近似乘法及标量乘法计算,从而将消费者对属性的离散意见转化为对某一品牌的综合意见.然后通过定义一种模糊数综合排序指标来确定消费者的品牌偏好顺序.最后还通过一个算例来说明方法的实用性和有效性.     

试论陈寅恪先生的文史互证研究

陈寅恪的史互证研究是中国人研究史上的一座丰碑。其“贴近现实、逆向思维、融贯古今、史笔诗心、突破前人”等方面均精湛独到，创造了一个学术研完的新时代。     

高中学生的物理成绩的调查与分析

经过两年广泛的调查，对调查结果进行统计，按教育统计学相关分析的计算方法，逐条求出各单元的相应系数。并对量化的部分结果进行了初步分析，指出了高中学生学习物理困难的主要原因，以及进行矫治的初步措施。该调查采集面广，样本大，计算方法科学，量化结果数据可靠，所反映的信息具有一定的代表性，可供中学物理同仁在教学改革中参考。     

High precision topographic data on Lop Nor basin's Lake "Great Ear" ? and the timing of its becoming a dry salt lake

High precision elevation measurements using DGPS were carried out along three representative tran- sects for the "Great Ear" area, a dry salt lake within the Lop Nor basin. Results indicate that the Lop Nor basin is only 5.2 m deep and its lowest point occurs at the center of the "Great Ear". In addition, the basin is asymmetric - steeper in the southwest (0.19‰) and gentler in the northeast (0.09‰). Points along the same "Great Ear" ring were found to have an identical elevation value, but different when from different ones (lower towards the center). The spacing of the "Great Ear" rings was found to be closely related with the surface steepness. The closer the "Great Ear" rings are spaced, the steeper the ground surface, and vice versa. These findings support the argument that the "Great Ear" rings are the former shoreline trails left behind by Lop Nor water during the last few episodes of recession towards its total dry up. A comprehensive analysis of the high precision elevation data, historical accounts, aerial and satellite photographs and imagery, and official topographic maps of the study area suggests that the "Great Ear" area in the Lop Nor basin was incorrectly mapped as being covered by a great body of water on the 1963 topographic maps. A re-interpretation of the 1958 aerial photographs and newer remote sensing imagery indicated that the "Great Ear" ring structure was already in place in 1958 and it continued to appear on the subsequent remote sensing data without any major changes. It is estimated that lake water in the "Great Ear" area of the Lop Nor basin disappeared between the late 1930s and early 1940s.     

语言模因论视角下的不可译现象研究

模因视角下对待不可译有两种处理办法：一是产生“基因型模因”，基本上采用直译或异化策略再进行补偿的办法，保证信息不失真，实现“相同信息异型传播”；二是产生“表现型模因”，在原模因的基础上产生较大的变异，采用意译或归化的翻译策略，实现“不同信息同型传播”。     

A/D转换技术及其发展

为了适应A/D转换发展的要求,A/D转换技术也变得越来越复杂。就A/D转换这一领域所应用的主要转换技术以及各自的特点做一简要的介绍,并由此推断出A/D转换技术的发展趋势。