基于结构元理论的模糊级数收敛性判定

基于模糊结构元理论,探讨了由模糊结构元线性生成的模糊数项级数收敛的充要条件,并得到了此类级数收敛性的若干判别方法.     

拟可微方程组牛顿法的二次收敛性

利用拟微分讨论了拟可微方程组的牛顿法和不精确牛顿法.引入了拟可微函数的拟强半光滑性.在拟强半光滑的前提下,证明了牛顿法和不精确牛顿法的二次收敛性.     

浅谈函数的幂级数展开

函数的幂级数展开是高等数学的重要内容．本文的目的是通过例子总结和研究高等数学中函数的幂级数展开的各种常用方法及一些特殊方法．     

Testing recapture model MT for departure from homogeneity

This paper presents a method of testing for animal heterogeneity when the capture effort is not constant from occasion to occasion. The basic set of statistics used is a lower triangular matrix whose (I,k)th element is the proportion of those animals caught on the next (i+1)the occasion who have been caught k times until now. Both theoretical and simulation evidence is presented that the new procedure is superior to methods previously suggested. The method may breakdown for certain kinds of behavioural response.     

Positive quadrant dependence tests for copulas

In this paper the interest is in testing the null hypothesis of positive quadrant dependence (PQD) between two random variables. Such a testing problem is important since prior knowledge of PQD is a qualitative restriction that should be taken into account in further statistical analysis, for example, when choosing an appropriate copula function to model the dependence structure. The key methodology of the proposed testing procedures consists of evaluating a “distance” between a nonparametric estimator of a copula and the independence copula, which serves as a reference case in the whole set of copulas having the PQD property. Choices of appropriate distances and nonparametric estimators of copula are discussed, and the proposed methods are compared with testing procedures based on bootstrap and multiplier techniques. The consistency of the testing procedures is established. In a simulation study the authors investigate the finite sample size and power performances of three types of test statistics, Kolmogorov–Smirnov, Cramér–von‐Mises, and Anderson–Darling statistics, together with several nonparametric estimators of a copula, including recently developed kernel type estimators. Finally, they apply the testing procedures on some real data. The Canadian Journal of Statistics 38: 555–581; 2010 © 2010 Statistical Society of Canada     

冶金设备备件制造企业信息化规划

在分析企业业务和价值链的基础上,构建了包含文化创新、管理创新和技术创新三大平台的企业应用系统模型,通过研究应用系统对数据处理特点和可靠性要求,将企业信息化模型划分成了知识层、管理层、执行层和控制层四个层次,在此基础上提出了冶金设备备件制造企业的网络系统和主机及存储模型.     

论全球会计趋同背景下的中国会计国际化问题

当前,全球会计国际化进程从协调阶段逐渐步入了趋同阶段。这一阶段的会计国际化进程表现出会计标准的一元化趋势明显,会计国际化步伐大大加快,国际会计准则的强制性更高等特征。从我国会计国际化现状看,我国会计准则的制定已走上了正确的国际化道路,并且进展很快,而我国会计实务的国际化水平远落后于会计准则。面对全球会计趋同的新背景,我们不仅要更加积极地参与全球会计国际化进程,还要进一步强化会计标准的执行机制,加快会计环境的建设。     

融媒体时代下医学院校官方微信公众号建设探析——以福建医科大学为例

探讨福建医科大学官方微信公众号在建设中遵循媒体规律、搭建服务功能、引领思想政治教育、传播校园文化的成效，分析其文章阅读量、传播指数WCI、推送位置和传播效果，结果表明，可基于新闻价值与信息性质准确传递思想内涵，以全程、全息、全员和全效为官微发展创新赋能，推进医学人文精神传播，构建思想政治教育融媒体的官微模式。     

A Simplified Method of Calculating an Overall Goodness-of-Fit Test for the Cox Proportional Hazards Model

Gronnesby and Borgan (1996) propose an overall goodness-of-fit test for the Cox proportional hazards model. The basis of their test is a grouping of subjects by their estimated risk score. We show that the Gronnesby and Borgan test is algebraically identical to one obtained from adding group indicator variables to the model and testing the hypothesis the coefficients of the group indicator variables are zero via the score test. Thus showing that the test can be calculated using existing software. We demonstrate that the table of observed and estimated expected number of events within each group of the risk score is a useful adjunct to the test to help identify potential problems in fit.