高校贫困生AHP-CBR分级认定模型建构

准确认定贫困学生资格是高校合理、公平分配资助资源的先决条件.本文利用层次分析法(AHP)与案例推理(CBR)原理建构高校贫困生分级认定模型,构造了贫困生案例属性层次模型;采用向量定义法,给出了案例库和贫困生分级认定问题的形式化描述;研究了以案例检索为基础的贫困生分级认定算法.模型有效性测试结果表明:案例库中案例数量大于1094条记录后,案例检索结果具有稳定的匹配案例相似度;对目标案例的求解结果与原认定结论进行显著性差异检验,Z检验统计量计算结果均小于1.96,二者无显著性差异,表明模型计算结果是有效的.     

从嘉绒谚语看嘉绒藏族多元文化元素——以米亚罗四土话为例

嘉绒语是一种保留了古代藏语面貌的独特语言:复辅音极为丰富,复辅音可以在元音前也可在元音后(CCCVCCC),无书面语.嘉绒谚语以特定的文化元素,反映了族群的文化认同,并通过口耳相传的方式代代传承.随着经济全球化趋势的形成和中国农村城镇化的开始,嘉绒谚语的生存和传承环境逐渐丧失了土壤和空间,嘉绒谚语在年轻一代中也正处于这种状况.以笔者所调查的米亚罗为例,当地的青年人大部分人不会嘉绒话,这就意味着嘉绒话呈现出濒临消失的趋势.因此,用国际音标记录嘉绒谚语,研究嘉绒谚语的文化元素有着重要的意义.     

1990-2007 年中国青少年消费研究发展述评

本文通过对1990到2007年发表在各类期刊的115篇关于青少年消费研究的学术论文进行梳理和分析,从研究时间、研究的学科视角、研究方法、对象界定和研究内容的角度,总结了青少年消费研究的基本情况和特点,并指出了既往研究在理论、方法、研究对象和范围等方面取得的成果和存在的不足。     

Latent Character Strength Profile and Grouping Effects

Social Indicators Research - Previous studies have shown that personality types may lead to different health status. The current study aims to refine a previous typological profile of strength...     

Threshold negative binomial autoregressive model

This article studies an observation-driven model for time series of counts, which allows for overdispersion and negative serial dependence in the observations. The observations are supposed to follow a negative binomial distribution conditioned on past information with the form of thresh old models, which generates a two-regime structure on the basis of the magnitude of the lagged observations. We use the weak dependence approach to establish the stationarity and ergodicity, and the inference for regression parameters are obtained by the quasi-likelihood. Moreover, asymptotic properties of both quasi-maximum likelihood estimators and the threshold estimator are established, respectively. Simulation studies are considered and so are two applications, one of which is the trading volume of a stock and another is the number of major earthquakes.     

国民生产总值计算问题初探

如何在继续做好社会总产值和国民收入统计的同时建立起国民生产总值统计,如何把国民生产总值的计算同改进社会总产值和国民收入的统计协调起来,是当前统计改革急需解决的问题之一。本文的目的,就是由此出发,对国民生产总值的计算问题,做一些初步探讨。     

Treatment effect measures under nonproportional hazards

In a clinical trial with a time-to-event endpoint the treatment effect can be measured in various ways. Under proportional hazards all reasonable measures (such as the hazard ratio and the difference in restricted mean survival time) are consistent in the following sense: Take any control group survival distribution such that the hazard rate remains above zero; if there is no benefit by any measure there is no benefit by all measures, and as the magnitude of treatment benefit increases by any measure it increases by all measures. Under nonproportional hazards, however, survival curves can cross, and the direction of the effect for any pair of measures can be inconsistent. In this paper we critically evaluate a variety of treatment effect measures in common use and identify flaws with them. In particular, we demonstrate that a treatment's benefit has two distinct and independent dimensions which can be measured by the difference in the survival rate at the end of follow-up and the difference in restricted mean survival time, and that commonly used measures do not adequately capture both dimensions. We demonstrate that a generalized hazard difference, which can be estimated by the difference in exposure-adjusted subject incidence rates, captures both dimensions, and that its inverse, the number of patient-years of follow-up that results in one fewer event (the NYNT), is an easily interpretable measure of the magnitude of clinical benefit.     

我国全社会科技资金投入问题研究

发展科学技术的两个关键要素是人才培养和资金投入。８０年代以来,我国科学技术发展已从关于人才断层的呼吁转到关于资金投入的不足,什么样的资金规模是适宜国情、国力的科技投入,似乎并没有一个可以公认的标准。虽然可以从不同的目标设定上取得经验性依据,但问题的根...     

关于中国影视文化发展现状、前景的分析与思考

改革开放以来,中国的影视文化一直呈一种二元结构,即以社会效益为价值旨归的"主旋律文化"和以经济效益为追求目标的"大众文化".于是社会效益(即精神教育功能)与经济效益(利润最大化原则)之间存在着内在的张力.在全球化背景下,要成功地抵御西方强势娱乐文化潜移默化般的价值渗透,必须使中国的文化作品真正做到寓教于乐.在这方面,介于两者之间的第三种影视作品能够起到兼顾两种效益的作用.     

西部开发之刑事法治问题探索

西部地区有其独特的“区情”,要为西部大开发创建良好的刑事法治环境,就必须考虑其传统的地域法律文化、多样的犯罪诱惑因素和落后的司法实际状况等具体“语境”,从而讲策略地准确打击犯罪和分层次地有效预防犯罪。