尺寸型对含间隙平面连杆机构误差传递系数的影响

提出了一般形式的含间隙平面连杆机构误差传递系数的回归方程．在运动副配合不变的条件下,利用蒙特卡洛方法进行模拟试验,并利用多元线性回归方法建立了机构主动件相对杆长对误差传递系数影响的回归方程．研究结果表明,当尺寸型变化时,主动件相对杆长对误差传递系数影响的回归方程形式不变     

On the Discrepancy Measures for the Optimal Equal Probability Partitioning in Bayesian Multivariate Micro-Aggregation

Data holders, such as statistical institutions and financial organizations, have a very serious and demanding task when producing data for official and public use. It’s about controlling the risk of identity disclosure and protecting sensitive information when they communicate data-sets among themselves, to governmental agencies and to the public. One of the techniques applied is that of micro-aggregation. In a Bayesian setting, micro-aggregation can be viewed as the optimal partitioning of the original data-set based on the minimization of an appropriate measure of discrepancy, or distance, between two posterior distributions, one of which is conditional on the original data-set and the other conditional on the aggregated data-set. Assuming d-variate normal data-sets and using several measures of discrepancy, it is shown that the asymptotically optimal equal probability m-partition of , with m ^1/d ∈ , is the convex one which is provided by hypercubes whose sides are formed by hyperplanes perpendicular to the canonical axes, no matter which discrepancy measure has been used. On the basis of the above result, a method that produces a sub-optimal partition with a very small computational cost is presented. Published online xx, xx, xxxx.     

基于Beta分布的最经济过程均值及检验规格限的确定

100%检验是对生产方和顾客都提供保护的一种检验方法,在工业生产或过程决策中起到非常重要的作用.考虑许多实际过程输出分布非正态的情况,本文以Beta分布作为过程输出分布,结合不对称二次质量损失函数,以生产方和顾客整个系统的损失最小为前提,提出最优检验策略.在全检决策中,建立了确定最优检验规格限及过程均值的经济模型.灵敏度分析反映了各参数对检验方案、最优过程均值确定及总损失的影响.数值计算结果说明本文所提模型对改进过程输出质量是有效的.     

MBDLM中卡尔曼滤波算法的改进研究

根据多变量Ｂａｙｅｓｉａｎ动态线性模型（简记为ＭＢＤＬＭ）在递推过程中出现的方差阵不正定、精底低以及滤波发散等情况进行分析，对原有卡尔曼滤波算法加以改进，给出了比较适用的递推算法。     

多元Pade''''逼近的恒等式

本文给出了多元Pade′逼近的三项恒等式以及基于这些恒等式的一个递推算法。     

SDL-2000动态语义定义方法

讨论了SDL-2000的建议Z．100的附件F中用分布式实时抽象状态机(ASM：Abstract State Machine)形式地定义SDL(Specisification and Descripiton Language)动态语义的方法。与基于通信顺序进程的方法相比，该方法能够更直接地定义SDL的动态语义，具有易于维护和可读性好等特点。     

Sibling species in the marine pollution indicator genus Pontonema Leidy (Nematoda: Oncholaimidae), with a description of P. mediterranea sp. nov.

Species of the marine nematode genus Pontonema have been found to dominate the macrobenthos under abnormally high conditions of particulate organic enrichment. Populations from organically enriched habitats in six localities (Kiel fjord, Germany; the Garroch Head sewage-sludge dump ground in the Firth of Clyde, Scotland; Cornelian Bay, N.E. England; the Tyne estuary, N.E. England; Sete, N.W. Mediterranean, France; Blanes Bay, N.W. Mediterranean, Spain) have been compared. Multivariate analyses of 16 morphometric characters in males, and 13 in females, shows that each population is significantly different morphologically from every other population. However, there is morphological overlap between the populations, and it is considered pragmatic to recognize three species in this group, based on a few stable morphological characters: P. vulgare (Bastian, 1865) from the Baltic, P. alaeospicula Bett and Moore 1988 from the UK sites, and P. mediterranea sp. nov. from the Mediterranean. P. mediterranea sp. nov. is described. The species were not found to have established sympatry in this study, unlike many other opportunistic taxa from organically enriched habitats, and the significance of this is discussed.     

事件驱动用户界面的规范设计方法

给出了一种从实际人机交互行为到用户界面规范的设计方法。方法建立在以AIP单元为基本单元的面向对象用户界面结构模型和扩充的着色网对话模型的基础上。人机交互行为由动作次序表达式的集合定义。人机交互行为作为概念规范可转换成着色网对话模型。在事件驱动的并发、多线索应用环境的支持下,Petri网对并发性的描述能力及模型引入的语义活动异步执行机制,能自然而灵活地实现多线索对话及用户界面与应用过程间的并发执行。在这里,着色网起着人机交互规范模型和执行模型两种作用。这种可执行的规范模型平滑了从系统规范到实现的过渡过程。     

拉直的多元线性模型以及某些泛假设检验

将多元线性模型 Y=XB+E,[E～(0,σ~2V(?)I)]拉直得出一元线性模型,从而得出多元线性假设检验的UMPI解,不便之处是V不知道,文中得出良好的渐近结果,有效地用于泛假设检验问题,可据以得统计聚类分析解。文中论证是在(?)球等高分布基础上进行的。     

Parameter modification for clustering criteria

The more ways there are of understanding a clustering technique, the more effectively the results can be analyzed and used. I will give a general procedure, calledparameter modification, to obtain from a clustering criterion a variety of equivalent forms of the criterion. These alternative forms reveal aspects of the technique that are not necessarily apparent in the original formulation. This procedure is successful in improving the understanding of a significant number of clustering techniques.The insight obtained will be illustrated by applying parameter modification to partitioning, mixture and fuzzy clustering methods, resulting in a unified approach to the study of these methods and a general algorithm for optimizing them.The author wishes to thank Professor Doctor Hans-Hermann Bock for many stimulating discussions.