小额信贷之违约概率模型:特别考虑异质性

在新巴塞尔资本协议(New Basel Capital Accord)对金融全球化的冲击及金融机构改善资产质量及合并政策的影响下,我国台湾地区金融业进入激烈合并竞争的时代.许多银行颇受降低逾放比率及增加净值报酬率与资产报酬率两难之困扰.消费性信用贷款产品利差大、风险分散,是金融机构授信经营极重要的产品.实证结果显示,采用世代研究(cohort study)建立之模型对样本数据之拟合程度较个案对照研究法(case-control study)的解释变异量为佳,且较符合新巴塞尔资本协议规定及科学程序.虽然Logistic 回归模型在建立逾期概率模型上广泛地被使用,但要求存在于同构型的变异数Var=np(1-p)假设上,且在数据分析上常因为出现变异数之异质性问题,故可采用调整变异数异质性之方法.     

黎族文学试论

本文对黎族文学从多层面加以论述。     

俄罗斯东正教的社会整合与道德教化作用研究

俄罗斯是一个有着深刻宗教情结的民族.东正教作为文化现象和意识形态,深深根植于俄罗斯民众的意识里,浓浓地融入俄罗斯民族的精神中,深刻地影响着俄国的历史与现实.为实现国家统一并加强皇权,以君权神授为宗旨的基督教作为最有力的思想武器被罗斯统治者"请入"罗斯.至此,无论是在鞑靼蒙古人入侵时期,还是在第一、二次卫国战争等俄苏历史的紧要关头,俄罗斯东正教均发挥了其社会整合与道德教化作用,并在促进国家统一、弘扬爱国主义传统、凝聚民族精神、规范民众道德和维护社会稳定等方面做出了积极而重要的历史贡献.     

约束优化问题的异步并行拟牛顿方法

提出了一种求解等式约束优化问题的异步并行拟牛顿方法 .若假设目标函数 f和约束函数h至少三次连续可微 ,且△h(x)对任意x∈Rn 均为满秩矩阵 ,证明了所提出的异步并行算法是 q—超线性收敛的 .     

英语引申意境的探析

英语中的引申是一种普遍现象。英译汉时不仅有时词义要引申。词组、分句或句子的含义有时也要引申,英语引申的意境,可以从褒与贬、抽象与具体、词义搭配、概念大小、逻辑修辞、引申层次和引申范围七个不同方面来探析。     

南朝文人“诗以用事为博”的文化考察

在皇权政治复归、士族政治势力逐渐被边缘化的南朝,士族文人为维护其门第以应对前所未有的挑战,向学术文化的深广处开掘,博学融通,试图以繁密、新奇的使事用典建构文学的防线,从而掀起了中国文学史上"诗以用事为博"的第一个高潮。     

Quadratic estimators of covariance components in a multivariate mixed linear model

It is known that the Henderson Method III (Biometrics 9:226–252, 1953) is of special interest for the mixed linear models because the estimators of the variance components are unaffected by the parameters of the fixed factor (or factors). This article deals with generalizations and minor extensions of the results obtained for the univariate linear models. A MANOVA mixed model is presented in a convenient form and the covariance components estimators are given on finite dimensional linear spaces. The results use both the usual parametric representations and the coordinate-free approach of Kruskal (Ann Math Statist 39:70–75, 1968) and Eaton (Ann Math Statist 41:528–538, 1970). The normal equations are generalized and it is given a necessary and sufficient condition for the existence of quadratic unbiased estimators for covariance components in the considered model.     

Local influence in multilevel models

The authors study the local influence of observations in multilevel regression models. To this end, they perturb simultaneously the variances, responses and design matrix. To measure the local change caused by these perturbations, they use generalized Cook statistics for the fixed and random parameter estimates. Closed form local influence measures also allow them to assess the joint influence of various observations. They suggest a simple computation method and illustrate their results using two examples.     

Wer das Stabilisieren vergisst: Warum eine schöne Abschlusspräsentation noch kein gutes Ende bedeutet

Many organizational change projects fail — despite a well thought out concept, professional project management and a binding implementation timetable. The reason why the expected success doesn’t materialize often lies with the missing maintenance. Once the project is officially completed and the client and project manager withdraw, the manner in which the organization will take up these changes is seldom systematically dealt with. Difficulties often arise when no discrete stabilizing measures are planned. We have derived four central action areas which will be clarified by way of practical examples. It will also be shown what is important to pay attention to in the stabilization phase so that a lasting success of the organizational change project can be ensured.