碳化硅晶须的高温稳定性

利用x-线衍射、扫描电镜和透射电镜等手段对三种不同来源的SiC晶须的热稳定性进行了研究。实验发现SiC晶须在180℃以上显微结构发生变化,长径比减小。讨论变化机质及对复合陶瓷性能的影响。     

土坡稳定分析强度折减有限元法

采用抗剪强度折减弹塑性有限元法分析土坡稳定性问题，通过与传统极限平衡法分析结果对比研究，对抗剪强度折减有限元法分析土坡稳定问题的适用性进行了评价；并得出土坡发生滑裂破坏前夕土体内应变状态的分布规律。     

用电磁感应法检测酸的浓度

介绍了用电磁感应法检测强酸浓度的测量原理与方法，并对测量实验数据进行了分析，对该方法的稳定性进行了研究。     

邓小平"政治稳定"思想探析

政治稳定是邓小平理论的重要组成部分，这一理论的形成有三个历史阶段，其基本内涵有：坚持马列主义、社会主义，反对“自由化”思想；坚持人民民主专政，维护政策的稳定性；坚持加强和改善党的领导，惩治腐败；坚持改革开放，推动国内政治稳定；坚持和平统一发展观，反对强权政治，营造稳定的国际环境五个方面。而构建和谐社会需要一个稳定的政治环境，其实现途径是经济发展、政治发展和文化发展。     

半群环的零因子

设R[S]是一个半群环,1为环R的单位元,g∈S（可消摹群）.给出了元1－g为零因子的充要条件,并得到了它的单边零化理想的一个刻划.     

Analysis on Dynamic Performance for Active Magnetic Bearing—Rotor System

In the application of active magnetic bearings(AMB),one of the key problems to be solved is the safety and stabiltiy in the sense of rotor dynamics,The project related to the present paper deals with the method for analyzing bearing rotor systems with high rotation speed and specially supported by active magnetic bearings,and studies its rotor dynamics performance,including calculation of the natural frequencies with their distribution characteristics,and the critical speeds of the system.one of the targets of this project is to formulate a theory and method valid for the analysis of the dynamic performance of the active magntic bearing-rotor systemby combining the traditional theory and method of rotor dynamics with the analytical theory and design method based on modern control theory of the AMB system.     

代数学基本定理的几种非代数证明

本文用非代数的方法给出代数学基本定理的七种不同的证明方法地。     

改善加氢裂化柴油及尾油光安定性的探讨

本文阐述了几种解决加氢裂化柴油或尾油制取润滑油时,光安定性问题的方法。说明利用加氢裂化柴油与尾油制取中、高档润滑油是可行的。     

Bias and the limits of pooling for large collections

Modern retrieval test collections are built through a process called pooling in which only a sample of the entire document set is judged for each topic. The idea behind pooling is to find enough relevant documents such that when unjudged documents are assumed to be nonrelevant the resulting judgment set is sufficiently complete and unbiased. Yet a constant-size pool represents an increasingly small percentage of the document set as document sets grow larger, and at some point the assumption of approximately complete judgments must become invalid. This paper shows that the judgment sets produced by traditional pooling when the pools are too small relative to the total document set size can be biased in that they favor relevant documents that contain topic title words. This phenomenon is wholly dependent on the collection size and does not depend on the number of relevant documents for a given topic. We show that the AQUAINT test collection constructed in the recent TREC 2005 workshop exhibits this biased relevance set; it is likely that the test collections based on the much larger GOV2 document set also exhibit the bias. The paper concludes with suggested modifications to traditional pooling and evaluation methodology that may allow very large reusable test collections to be built.

生活背后的力量——从我国的民族分类看多元文化的“和而不同”

当前,倡导文化多元化发展的呼声日趋高涨.鉴于此,结合库恩提出的文化不可通约理论,从民族分类的角度出发探讨如何消除心理偏见对“和而不同”的文化追求的不良影响,以期为我国多民族文化的发展问题做一些反思性的铺垫.