执政信任问题初探

执政信任的形成、实现、巩固和增强,需要执政者追求并实现公正合理的执政理念,树立良好卓著的执政形象,特别需要执政者公正、为民、清廉、诚信;同时还需要执政者建立与健全民主制度,实行法治。执政信任是社会团结的重要道德基石,是执政者的政治灵魂和政治生命,对于政治文明建设具有十分重要的意义。     

宇宙临界减速因子

本文证明了如果中微子具有质量,那么膨胀宇宙的临界减速因子q_c就不是通常所说的1/2而是等于1。     

浅谈智能模糊控制恒压供水系统

文章介绍在变频恒压供水系统的基础上采用智能模糊控制等特性来完成恒压供水。     

三球式和转台式角动量守恒演示器的研制与应用

本文详细介绍了笔者研制的三球式和转台式两种新型角动量守恒演示器的结构、特点和使用方法。     

首达渗流中关于时间常数μ的上界估计

对2维首达渗流的时间常数μ给出了一个上界估计．     

谈英语阅读中捷效寻读教学及能力的培养

根据对一些学生的日常阅读情况的观察和阅读理论最新的研究成果 ,以及心理学的相关理论的分析 ,提出应该加强捷效寻读技能的教学 ,从理论和实践上提出了相应的方法。     

Exponential smoothing: Behavior of the ex-post sum of squares near 0 and 1

When using simple exponential smoothing on a given time series the nature of the relationship between the optimal smoothing constant and the autocorrelation structure of the series remains an unresolved question. Although numerical search routines can easily be used to find optimal values of the smoothing constant, they offer little insight into the nature of the relationship between the estimated smoothing constant and the structure of the underlying time series. We suggest that renewed investigations of the ex-post sum of squares function may prove helpful in this pursuit. Results are presented that illustrate how the optimal smoothing constant depends upon the value used to initialize the smoothing and upon the sample autocorrelation coefficients of the observed series. These results are based on a new formula for the derivative of the ex-post sum of squares function. In particular, the derivative is examined near 0 and 1, where great simplifications occur in its form, thereby facilitating investigations near these points. A necessary and sufficient condition is stated for when the ex-post sum of squares must have a positive derivative at 0 and the autocorrelation coefficients of the differenced series are shown to affect the sign of the derivative near 1. Based on these results, a general algorithm is presented as an alternative to grid search routines for minimizing the ex-post sum of squares.     

三种测应变线路的比较

介绍了三种测应变的线路,通过实验证实,在测扭矩时,用4片电阻应变片构成的线路,可以排除弯矩的影响。     

选择最小方差阈值的判别式方法

本文阐述了选择最小方差阈值的各次累积矩判别式方法,证明了零次矩判别式最小方差阈值选择法在理论上可使统计累积矩的次数降到最低,在实用上可进一步减少运算量。     

保险在西部民族地区小康建设中的方位和空间

从分析西部民族地区保险业与全国保险业发展水平的差距及背景入手，指出西部民族地区保险业所处的现实方位及在财产保险、农业保险和人寿保险等方面进一步拓展的广阔空间，发挥保险业在风险保障、资金融通和社会管理方面的作用。