将分段函数表示为初等函数的方法

本文给出了一种化具有多个分段点，且在各区间段上的表达式为多项式函数的分段函数为初等函数的具体方法．     

Generalized additive models for location, scale and shape

Summary.  A general class of statistical models for a univariate response variable is presented which we call the generalized additive model for location, scale and shape (GAMLSS). The model assumes independent observations of the response variable y given the parameters, the explanatory variables and the values of the random effects. The distribution for the response variable in the GAMLSS can be selected from a very general family of distributions including highly skew or kurtotic continuous and discrete distributions. The systematic part of the model is expanded to allow modelling not only of the mean (or location) but also of the other parameters of the distribution of y , as parametric and/or additive nonparametric (smooth) functions of explanatory variables and/or random-effects terms. Maximum (penalized) likelihood estimation is used to fit the (non)parametric models. A Newton–Raphson or Fisher scoring algorithm is used to maximize the (penalized) likelihood. The additive terms in the model are fitted by using a backfitting algorithm. Censored data are easily incorporated into the framework. Five data sets from different fields of application are analysed to emphasize the generality of the GAMLSS class of models.     

“X化”结构构成限制及条件

现代汉语中的“X化”能产性很强,功能上也很有特点,近年来的使用频率日趋上升,“X化”结构的词几乎每天都在增加。但是,我们常说:“现代化、工业化、规范化、绿化、美化、老化”等,却从不说:“(*雷锋化、*长化、*大化”等,这说明在“X化”内部一定蕴含着某种规律支配着这个结构的运转,“X化”的强大的能产性是受到一定限制的。本文根据调查结果[1]对这种限制做一些初步探讨,认为一个成分能否进入“X化”结构大概受到三个方面的限制:1)“X”本身在概念上的要求;2)语用频率上的限制;3)类推作用的影响。     

对Word、Excel自动阅卷方法的探讨与实现

介绍了对Word、Excel操作考题实现自动阅卷的设计思想、实现方案及关键技术，并给出了部分源程序。     

贞观诗坛宫廷诗格律的发展探察——以李世民为中心

格律诗的核心是重平仄，从这一核心出发，对以李世民为中心的贞观宫廷诗坛创作的五言八行体诗歌的平仄格律进行了梳理，由此探察了唐五言律诗格律形式的发展。     

Catalogue of Group Structures for Three-level Fractional Factorial Designs

Taguchi (1959) introduced the concept of split-unit design to sort the factors into different groups depending upon the difficulties involved in changing the levels of factors. Li et al. (1991) renamed it as split-plot design. Chen et al. (1993) have given a catalogue of small designs for two- and three-level fractional factorial designs pertaining to a single type of factors. Aggarwal et al. (1997) have given a catalogue of group structure for two-level fractional factorial designs developed under the concept of split-plot design. In this paper, an algorithm has been developed for generating group structure and possible allocations for various 3^n-k fractional factorial designs.     

Where do we stand? Recent AEA member views on professionalization

The professionalization of evaluation continues to be debated at numerous conferences in the U.S. and abroad. At this time, AEA member views on the potential benefits and negative side effects of professionalization are essential as the discussion evolves. This study provides recent views on major topics in professionalization, including potential benefits, negative side effects, processes, competencies, and procedures. Results from in-depth interviews and an online survey demonstrate that AEA members view potential benefits of professionalization to be stakeholder trust, evaluator reputation and identity, while concerns about a potential negative side effect known as the “narrowing effect” (i.e., some evaluators will be alienated based on their background, competencies, etc.) were expressed by participants. These recent findings can inform the ongoing discussion of professionalization, and suggest new directions for future research on evaluation.     

A model with long-term survivors: negative binomial Birnbaum-Saunders

Abstract

We propose a cure rate survival model by assuming that the number of competing causes of the event of interest follows the negative binomial distribution and the time to the event of interest has the Birnbaum-Saunders distribution. Further, the new model includes as special cases some well-known cure rate models published recently. We consider a frequentist analysis for parameter estimation of the negative binomial Birnbaum-Saunders model with cure rate. Then, we derive the appropriate matrices for assessing local influence on the parameter estimates under different perturbation schemes. We illustrate the usefulness of the proposed model in the analysis of a real data set from the medical area.     

积极心理学视角下大学生心理健康教育实效性研究

积极心理学是当今时代下心理学界所兴起的一种全新的研究领域,并在一定程度上应用到了大学的心理健康教育当中,从而能够在一定程度上,增加教育的时效性。通过积极心理学的教学观念,将心理学视角下的健康教育深入大学生的日常教学当中,进而能够深入挖掘以及培养大学生的积极心理品质,全面优化大学生的心理教育的环境,进而用更加先进的积极心理学理念,指导并帮助大学生构建更加完善的心理观念。     

试析哈萨克族学生汉语否定结构的习得顺序?

在分析汉语否定结构的有关特点及回顾第二语言学习者学习汉语否定结构的研究成果后,以哈萨克族学生学习汉语否定结构时可能遇到的困难为基础,选取不同类型的常用词类和结构设计了调查问卷。通过统计不同水平的学生掌握汉语否定结构的准确度,解释了他们对这一结构的习得顺序。文章认为,哈萨克族学生对汉语否定结构的习得顺序,不但与否定结构的复杂程度有关,而且也与哈萨克语和汉语否定结构上的差异有关。