贝叶斯型的时变系数回归模型

提出了具有时变系数的回归模型及其模型识别和参数估计的贝叶斯方 法．在此模型中对于时变回归系数的变动，应用了高斯型概率差分方程式作 为约束条件，称之为高斯型平滑性事先分布．模型中的超参数（ｈｙｐｅｒｐａｒａｍｅ－ ｔｅｒ）的估计，采用了最大似然估计法．模型的识别（差分次数的决定）应用了 Ａｋａｉｋｅ的最小 ＡＢＩＣ法．给出了模型估计的算法及其应用例子．最后，讨论了 平滑性事先分布中参数的最优估计的意义．     

信息熵,约束与序

一个随机系统的几率分布函数Ｐ（ｑ）常是在一定的约束条件下的最大熵分布，而其信息熵Ｓ则是系统状态无序性的量度，本文证明，增加约事的数目和强度都将使Ｓ减少，使系统趋于较有序的状态。     

高阶非线性非完整系统的相对论性广义Boltzmann—Hamel方程

本文由万有D'Alembert原理推导出高阶非线性非完整系统的相对论性广义Boltzmann-Hamcl方程。     

Connecting Conditions and Constraint Equations in Applied Science

IntroductionIn applied science , e . g . machinery , vibrationmechanics , fluid mechanics , and management science , toobtain the opti mal solution of some issues , the objectfunction is usually shown since the abstract mathematicsmodel is set , and all kinds of boundary conditions andconnecting conditions or constraint conditions are putforward . Above these conditions are shown with the shapesof constraint equations . For example ,in machinery opti maldesign, to get the opti mal solution of …     

Global analysis theory of climate system and its applications

The idea and main theoretical results of the global analysis theory of climate system are briefly summarized in this paper. A theorem on the global behavior of climate system is given, i.e. there exists a global attractor in the dynamical equations of climate, any state of climate system will be evolved into the global attractor as time increases,indicating the nonlinear adjustment process of climate system to external forcing. The different effects of external forcing, dissipation and nonlinearity on the long-term behavior of solutions are pointed out, and some main applications of the global analysis theory are also introduced. Especially, three applications, the adjustment and evolution processes of climate, the principle of numerical model design and the optimally numerical integration, are discussed.     

水泥砼路面平整度低的因素及提高措施

为更好地提高水泥砼路面的平整度，笔者对水泥砼路面平整度低的因素进行了分析，并提出了提高措施。     

并联混合动力汽车扭矩协调控制策略仿真研究

对于使用机械式自动变速器(AMT)的并联式混合动力汽车(PHEV),能量管理策略的实现需要对发动机、电机以及离合器和变速箱进行协调控制,为此,建立一个分层控制系统来管理整车的能量分配和实现整车的能量分配策略。能量管理策略的实现层以改善车辆行驶平顺性和减小离合器磨损为目标,协调控制动力和传动系统,实现能量管理层需要的扭矩分配、工作模式切换以及换档等要求。在Matlab/Simulink环境下建立了并联式混合动力汽车动力传动系统的仿真模型,通过仿真进行控制策略的辅助设计并验证了控制策略。当前开发的控制策略已经应用于实车,试验结果表明了控制系统和控制策略的适用性。     

Best Tracking Performance under Plant Uncertainty and Control Energy Constraint

This paper has investigated best tracking performance for linear feedback control systems in the case that plant uncertainty and control effort need to be considered simultaneously. Firstly, an average integral square criterion of the tracking error and the plant input energy over a class of additive model errors is defined. Then, utilizing spectral factorization to minimize the performance index, we obtain an optimal controller design method, and furthermore study optimal tracking performance under plant uncertainty and control energy constraint. The results can be used to evaluate optimal average tracking performance and control energy in designing practical control systems.     

基于均值约束满足度剪枝策略的高效序列模式挖掘算法

为了减少无用候选序列的生成,并使挖掘得到的序列模式符合用户要求,约束条件下的频繁序列模式挖掘已成为数据挖掘领域的一个新的重要研究方向.作为强约束形式的一种,均值约束目前仍然是基于约束的频繁序列模式挖掘的一个困难问题,其主要原因在于很难利用均值约束来进行序列模式挖掘中的剪枝.为此,提出了一种基于均值约束满足度剪枝策略,并且以前缀增长方法为基础设计了一个有效的频繁序列模式挖掘算法.通过分析并实验验证了该算法的时间效率和剪枝性能,结果表明,该方法是有效的.