Testing for a change in covariance operator

The paper considers a problem of equality of two covariance operators. Using functional principal component analysis, a method for testing equality of K largest eigenvalues and the corresponding eigenfunctions, together with its generalization to a corresponding change point problem is suggested. Asymptotic distributions of the test statistics are presented.     

Ban Estimation for Chi-Square Test Criteria in Categorical Data

This expository paper describes some recent work that further develops the theory of BAN estimators and the related chi-scuare test statistics.The extensions are in several directions: (a) the class of regular estimators is broadened by permitting extraneous random elements; (b) more general models are permitted under the constraint equations specification; and (c) BAN estimators are defined for general models combining features of two types of specification.In particular, WLS estimators are shown to be BAN.     

关于带权Hardy不等式

本文得到了Hardy算子Tf(x)=integral from o to x f(t)dt从空间L~p(R_+,vdx)到L~q(R_+,Udx)有界的权函数对(u,v)的特征,其中1≤q相似文献   

国有企业经营者选拔中的难题及解决思路

民营企业的创业过程与企业家形成过程是统一的,而国有企业往往是先有企业后有经营者的。从理论和实践上看,国有企业经营者选拔中存在诸多难题,它体现在风险承担的不对称、信息缺陷严重、选拔标准在实践中扭曲、经营者身份的准官员化、能力信号显示与专用性知识投资之间的突出矛盾上。如果不能很好地解决这些问题,任何意义上的国有企业改革都不可能取得实效。为此,要通过对国企准确定位,区分不同类型的经营者,政府主动"淡出"选拔过程与相机干预相结合,发挥机构投资者的作用及发展完善的经理市场来加以优化。     

关于非自伴算子D~4+X~α+iX~β的极限点性质

本文解决了一般的非自伴问题：如果L＝（-1）kDkPkDk是极限点的,M是一个阶数不超过2n的微分算子,L＋iM如何能保持极限点的性质。     

简并能级多级微扰的高阶修正

就最一般情况，给出了简并能级多级微扰至四阶的修正过程，得到了能量修正和近似波函数的公式．     

具反射边界条件的板模型迁移系统的临界性

研究非均匀介质,各向同性,具反射边界条件的板模型迁移系统的临界解.借助泛函分析方法,特别是Lp空间上的线性算子理论,证明了积分算子的主本征值(即临界参数)的性质,并获得了系统处于次临界状态的条件以及使系统处于临界状态的板厚度的存在性.     

Pseudo Self-Consistent Estimation of a Copula Model with Informative Censoring

Abstract.  We consider the case where a terminal event censors a non-terminal event, but not vice versa. When the events are dependent, estimation of the distribution of the non-terminal event is a competing risks problem, while estimation of the distribution of the terminal event is not. The dependence structure of the event times is formulated with the gamma frailty copula on the upper wedge, with the marginal distributions unspecified. With a consistent estimator of the association parameter, pseudo self-consistency equations are derived and adapted to the semiparametric model. Existence, uniform consistency and weak convergence of the new estimator for the marginal distribution of the non-terminal event is established using theories of empirical processes, U -statistics and Z -estimation. The potential practical utility of the methodology is illustrated with simulated and real data sets.     

企业经营者业绩考核可持续发展指标体系研究

现行企业经营者业绩评价模式大都忽视环境问题,时间跨度较短,仅仅看年度利税或销售额等指标,这显然与可持续发展的要求不相适应。为此,建立一套评价企业经营者业绩考核的可持续发展指标体系很有必要。文章以此为基础提出了设置企业经营者业绩考核的可持续发展指标体系的原则,构建出企业经营者业绩考核的可持续发展指标体系。