膨胀土的浸水规律

根据土体浸水速率（导水库）与土体结构的理论关系和膨胀土结构的分形模型,导出了膨胀土的浸水速率与含水量,吸力、时间和上覆荷载的相关关系。理论和试验结果表明：膨胀土的浸水速率与含水量、吸力和时间在双对数坐标上呈直线相关,随着含水量增加、吸力减小,浸水速率增大、浸水速率随时间延长而减小;浸水速率的对数与上覆荷载呈直线相关,上覆荷载越大,浸水速率越小。     

Inorganic chemical composition and source signature of PM2.5 in Beijing during ACE-Asia period

Aerosol samples for PM2.5 were collected in Beijing for 38 consecutive days from March to April 2001 using an IMPROVE Sampler. Concentrations of 20 elements in PM2.5 were determined using a PIXE method. Results show that the average mineral dust concentration of PM2.5 was 14.6 Ilg/m3 during the observation period. On the sand-dust event days of March 21 and April 10, dust PM2.5 mass concentrations were 62.4 and 54.1 μg/m^3, respectively.These demonstrate that fine particle pollution by dust event in Beijing was very severe. The enrichment factors of S and Cu reached minimums on the dusty days and were high on the non-dusty days. It is considered that enrichment factors of elements in PM2.5, which are associated with human activities, can probably provide an effective method to distinguish local sources from external sources of dust. Factor analysis on the chemical composition in PM2.5 shows that sources of crustal matters, anthropogenic emission, and oil combustion contributed to PM2.5 levels in air in the springtime of 2001 in Beijing.     

顶电极对金属-绝缘体-金属器件I-V曲线对称性的影响

通过顶电极金属材料的选择，考察金属-绝缘体-金属器件的I-V曲线的对称性．并用p-n-n能带模型进行了分析解释．结果表明，采用电负性小于1.6的金属作顶电极，并在一定温度下对该器件进行热处理，可以提高其I-V曲线的对称性．     

模拟区域气候变化的模式系统的建立及其效能检验

建立了一个富有特色的模拟区域气候变化的模式系统．该模式系统对模式中陡峭地形的处理方法进行了改进，并且在云量参数化方案中考虑了大气的动力学结构．其中大气模式与海洋模式和土壤模式简单耦合，和ＧＣＭ单向嵌套以反映大气环流背景对区域气候的影响．通过对模拟结果的比较和检验，发现区域模式对侧边界条件的依赖性很强，客观真实的侧边界条件是模式能够正确模拟区域气候要素的最重要的条件之一．模式分辨率的提高，中尺度强迫如地形高度和下垫面类型的细致刻划，都有利于气候要素场特别是边界层和地表气候状况模拟效果的改善．     

基于组件式GIS技术的城镇土地定级估价信息系统设计--以新疆喀什市为例

利用GIS技术建立土地定级估价信息系统在目前大中城镇土地定级估价中显得尤为重要。本文介绍了组件式GIS的技术特点及解决方案，并结合新疆城镇特点，提出了一些使用组件式GIS技术建立新疆城镇土地定级估价信息系统的设计思想，并对系统模块的组成进行了分析与设计。     

2×2线性退化系统初边值问题的显式解

给出了一类2×2线性退化拟线性双曲系统初边值问题解的显式公式,并证明初边值问题古典解的存在性和惟一性.     

Ni-Si合金材料与Ni-Si/C复合阳极材料的结构和电化学性能研究

采用大气熔炼-机械球磨二步法制备一系列Ni-Si合金材料和Ni-Si/C复合材料,并运用X射线衍射XRD、场发射扫描电子显微镜FE-SEM和恒电流充放电等测试方法对Ni-Si合金材料和Ni-Si/C复合阳极材料的结构和电化学性能进行了研究.结果表明,Ni-Si合金材料的放电比容量随着Si含量的增加呈上升趋势,但第1周材料充放电的库仑效率下降;采用炭包覆法制备的Ni-Si/C复合阳极材料与Ni-Si合金材料相比,其电化学循环性能大幅度提升,Ni-Si/C复合阳极材料第10周放电比容量保持分数是Ni-Si合金材料的6倍左右,这是因为机械球磨使炭粉均匀地分布在合金颗粒之间,提高了复合阳极材料的导电性.     

双金属固相复合异步轧制新工艺

在φ90/φ200×200 mm 可逆的四辊轧机上进行异步轧制复合新工艺的研究,并与常规轧制的特性比较;研究了轧制工艺参数对复合过程的影响。结果表明,异步轧制对双金属固相复合有特殊的优越性,充分显示出降低轧制压力的特点。采用此工艺可以在一般的四辊轧机上轧出宽板带复合双金属。此工艺可以应用于双金属固相复合的工业生产中。     

Build the First-class Plateau Railway in the World

The construction engineering of Qinghai-Tibet railway is fonnidahle but magnificent with very complicated geological conditions, facing “three difficult problems” of permafrost, severe coldness ＆ oxygen deficiency and fragile ecology. All of the working staff stick to human foremost principle, upgrade construction concept, realize the management innovation, implement the legal person responsibility system for construction project, form the management system featuring in the integration of quality-environment-occupational health ＆ safety, optimize project organization ＆ coordination s.vstem and establish the complete ＆ rigorous construction target system. Tackle the difficuhty of permafrost relying on science and technology and the finished roadbed, bridges and tunnels are in stable condition. Carry. out the basic national policies and protect geological environment, being the leading position in the construction of important and key construction projects and of demonstration significance. Insist on human foremost principle and guarantee the occupational health, creating the altitude medical miracle of “zero death of high-ahitude disease, zero occurring of SARS and zero spread of plague”. The construction also advances and implements “three specific requirements”, that is, the train passes the plateau in fast speed, high-reliable and less maintenance of operation equipment and minimum management staff of the line.     

南亚高压与我国盛夏气候异常

利用多年逐候平均资料，分析得到盛夏南亚高压的两类平衡态－青藏高压和伊朗高压，它们又可各分为东西部型。讨论了两类平衡态及其东西部型时的温度和降水分布差异。发现：青藏高压时，高压中心及其东南地区地面气温偏高，高压西北及北面的气温明显偏低，高压东侧的东亚地区多雨.伊朗高压时，高压中心及其西北区气温偏高，高压东南区的气温偏低，在高原南侧的印度北部地区降水偏强。青藏高压东部型使长江下游及西北地区多雨，华北和华南等大片地区干旱少雨；西部型使中国西南至华北大片东北－西南走向的地区为多雨，西北地区则高温干旱。伊朗高压东部型使中国东部沿海地区多雨；西部型使中国江淮流域有 明显的多雨带。