加筋壳体振动特性分析方法

分析了解析方法和数值方法在加筋壳体振动特性分析中的应用及两种基本方法的利弊，提出一种改进的分析方法──半解析数值法．     

Ng10二通插装阀结构形状及参数的试验研究

本文提出了测量Ng10二通插装阀静,动态性能的试验方法,测试了阀套开口形状、各种尾部结构的阀芯、阀芯行程、阀芯锥度、控制盖板阻尼孔尺寸等结构形状参数对插装阀静、动态性能的影响,并对试验结果进行了对比分析.在此基础上.确定了本文述及条件下的最佳结构形状和参数.     

Jackknifing in Categorical Data Analysis

Estimation of nonlinear functions of a multinomial parameter vector is necessary in many categorical data problems. The first and second order jackknife are explored for the purpose of reduction of bias. The second order jackknife of a function g(.) of a multinomial parameter is shown to be asymptotically normal if all second order partials ?²g( p )?dp_i?p_j obey a Hölder condition with exponent α>1/2. Numerical results for the estimation of the log odds ratio in a 2times2 table demonstrate the efficiency of the jackknife method for reduction of mean-square-error and the construction of approximate confidence intervals.     

新视野:建筑感性工学的维度及其价值

建筑感性工学是建筑美学与建筑工学相结合的产物。建筑设计在感觉参数、知觉意象与听觉系统等感性工学维度上具有独特的美学理念。从建筑形象设计考量,感觉参数是建筑感性工学的首要维度;在建筑空间设计向度上,知觉意象是建筑感性工学的体验形态;在建筑时间设计中,听觉系统是建筑感性工学的立体声响诉求。在当代感性工学与商业资本运作下,建筑感性工学显示出建筑空间既是居住者生活情趣的视听空间,也是社会的表情、文化与身份的独特价值空间。     

Asymptotic risk comparisions of restricted and unrestricted maximum likelihood estimators

Conditions for choosing between restricted and unrestrieted maximum likelihood estimators based on various asymptotic risk oriteria are derived. These conditions involve the non-centrality parameters of classical and specification test statistics, and are generlizations of well known results for the linear regression model.     

Approximate Confidence Limits for the Difference between Parameters of Two Pólya Distributions

The problem of calculating approximate confidence limits for the difference between success probability parameters of two Pólya distributions is solved for the first time. We suggest some new methods for determining these approximate confidence limits and consider their application to special cases: namely for the binomial and hypergeometric distributions. The various approximate confidence limits are evaluated and compared.     

Reconsideration of the F-test of the analysis of variance: the semi-bayesian significance test

The usual F-test of the analysis of variance is reconsidered within the Bayesian framework, In terms of predictive distributions, This leads to the notion of semi-Bayesian significance test, so called because it consists in only probabilizing the space of nuisance parameters, thus bringing a general principle for “eliminating” nuisance parameters, or more exactly incorporating information about these parameters. The approach is shown to extend the F-tests, by allowing the testing of hypotheses of non-zero effects.     

带通滤波器的计算新思路

用一种新的思路和方法 ,先计算低通、再计算高通滤波器的有关参数 ,然后组合成带通滤波器     

高速铁路钢轨波浪型磨耗研究及其防治建议

基于中国高速铁路钢轨出现波磨的现象，对高速铁路波磨的特点做了详细介绍。指出目前波磨理论的局限性，并分析了高速状态下波磨的动力学成因，以及钢轨材质对波磨的影响，并给出了可行的预防与减缓波磨的建议。     

Measuring the complexity of generalized linear hierarchical models

Measuring a statistical model's complexity is important for model criticism and comparison. However, it is unclear how to do this for hierarchical models due to uncertainty about how to count the random effects. The authors develop a complexity measure for generalized linear hierarchical models based on linear model theory. They demonstrate the new measure for binomial and Poisson observables modeled using various hierarchical structures, including a longitudinal model and an areal‐data model having both spatial clustering and pure heterogeneity random effects. They compare their new measure to a Bayesian index of model complexity, the effective number p_D of parameters (Spiegelhalter, Best, Carlin & van der Linde 2002); the comparisons are made in the binomial and Poisson cases via simulation and two real data examples. The two measures are usually close, but differ markedly in some instances where p_D is arguably inappropriate. Finally, the authors show how the new measure can be used to approach the difficult task of specifying prior distributions for variance components, and in the process cast further doubt on the commonly‐used vague inverse gamma prior.