Sobolev空间中非线性椭圆组的Riemann边值问题

本文研究平面非线性随圆型方程组的Riemann边值问题：在假设条件A1、A2、A3之下，我们证明了该问题存在唯一的解w（z）∈W1.,（■），1＜P＜＋∞     

Issues in applying recent CPMP ‘Points to Consider’ and FDA guidance documents with biostatistical implications

The International Conference on Harmonisation guideline ‘Statistical Principles for Clinical Trials’ was adopted by the Committee for Proprietary Medicinal Products (CPMP) in March 1998, and consequently is operational in Europe. Since then more detailed guidance on selected topics has been issued by the CPMP in the form of ‘Points to Consider’ documents. The intent of these was to give guidance particularly to non‐statistical reviewers within regulatory authorities, although of course they also provide a good source of information for pharmaceutical industry statisticians. In addition, the Food and Drug Administration has recently issued a draft guideline on data monitoring committees. In November 2002 a one‐day discussion forum was held in London by Statisticians in the Pharmaceutical Industry (PSI). The aim of the meeting was to discuss how statisticians were responding to some of the issues covered in these new guidelines, and to document consensus views where they existed. The forum was attended by industry, academic and regulatory statisticians. This paper outlines the questions raised, resulting discussions and consensus views reached. It is clear from the guidelines and discussions at the workshop that the statistical analysis strategy must be planned during the design phase of a clinical trial and carefully documented. Once the study is complete the analysis strategy should be thoughtfully executed and the findings reported. Copyright © 2003 John Wiley & Sons, Ltd.     

喷涂热分解法制备掺锑SnO_2电热膜的工艺及电学性能的研究

本文研究了热喷涂分解法制备Sb:SnO2电热膜的工艺及基体对电热膜电学性能的影响,并讨论了该膜的电阻温度系数的变化.实验表明:喷涂工艺对掺Sb的SnO2电热膜的电学性能有很大影响.     

煤炭城市发展非煤产业研究

煤炭城市产业结构生成和变化的特殊性 ,决定其发展非煤产业具有历史必然性和现实紧迫性。煤炭城市发展非煤产业应选择以煤炭等矿产品的深加工转化型为主 ,以节能综合利用型为辅 ,相关产业配套 ,非相关产业适当发展的模式。模式的实施和实现 ,要依靠国家调整宏观调控政策 ,健康发展煤炭主业 ;要建立煤矿转产基金 ,为非煤产业提供必要的积累 ;要调整投资结构 ,搞好招商引资 ;要制定科技进步政策 ,增强科技创新能力 ;要加强生态环境保护与建设 ,提高可持续发展能力 ;要深化煤炭企业改革 ,加快体制和机制创新 ;要实施人才战略 ,用新机制上新项目     

平板非稳态导热逆问题的近似解

对一维物体非稳态加热或冷却的表面温度的计算进行了研究，在增加一个参数的基础上，采用积分求解的方法，获得了一个近似解，此解不仅表达式简单，便于应用，而且具有较高的准确度，该表达式还可方便地应用于变异热系数的场合。     

板栗干枯病的低温防治初探

在冬季低温条件下,用40%腐烂敌80倍液及其它药剂对板栗干枯病进行病部涂抹防治,用白色塑料薄膜包严。调查不同处理时期的防治效果发现,以11月22日腐烂敌处理效果最佳,病部复发率最低(为零),为板栗干枯病的有效防治提供了科学依据。     

40Cr摆动滑块热处理工艺的改进

对截面尺寸较大、结构复杂的40Cr钢件采用常规热处理工艺变形大，难于满足技术要求,经过工艺改进：受只了亚；淬火工艺，结果表明：亚温淬火工艺在保证原工件性能的情况下，显著减小了淬火变形，避免了开裂，降低了生产成本.     

用边界构造拓扑

在非空集合的子集簇中引入一种自映射边界运算,以此为基础建立拓扑空间的概念,并且论证了一个集在边界运算下的象与其在该拓扑空间中边界的等价性     

复调和函数的混合边值问题

利用Ｆｏｕｒｉｅｒ方法得到复调和函数的混合边值问题解的表示式及解的存在性定理并讨论了解的唯一性．     

多载波CDMA在Rician衰落信道的性能研究

在一种同步ＯＦＤＭＣＤＭＡ的系统模型基础上,对频率非选择性Ｒｉｃｉａｎ衰落信道的误码率性能进行了研究,分析和数值结果说明由于多径的存在系统误码率性能迅速下降,而且当直射成分很小时,信道为Ｒａｙｌｅｉｇｈ信道,系统性能变为最差。