Estimation in noncentral distributions

This paper investigates alternatives to MIU estimators in noncentral X ² and F distributions. Two directions are pursued. In the first, a general approach for uniformly improving on MVU estimators is described and illustrated. In the second, Bayesian, procedures are characterized and illustrated as well. This effort extends earlier work of Perlman and Rasmussen and of Neff and Strawderman.     

A new approach for joint modelling of longitudinal measurements and survival times with a cure fraction

The joint analysis of longitudinal measurements and survival data is useful in clinical trials and other medical studies. In this paper, we consider a joint model which assumes a linear mixed $tt$ model for longitudinal measurements and a promotion time cure model for survival data and links these two models through a latent variable. A semiparametric inference procedure with an EM algorithm implementation is developed for the parameters in the joint model. The proposed procedure is evaluated in a simulation study and applied to analyze the quality of life and time to recurrence data from a clinical trial on women with early breast cancer. The Canadian Journal of Statistics 40: 207–224; 2012 © 2012 Statistical Society of Canada     

谈"一NX"结构——兼谈与"满NX"的比较

“一N”是一种临时性的量词短语,能够做临时量词的“N”都具有“处所”这一语义特征;并且由于“一N”的非量化作用,使得“一NX”具有了描述性语义功能;“一N”在句法分布上也受到了非量化语义特征的约束而有所限制。相比之下,“满N”在时于“N”的选择、语义功能、句法分布等方面更加灵活和多样。     

“多(么)A的N”式感叹结构探析

"多(么)A的N"式感叹结构焦点前置,言简意赅,表现力强;句法功能多样,在句中主要做谓语,用来对主语的某种特质或属性进行评价性咏叹。当其出现在复句中时,一般处于起始分句或结束分句的位置上,对语境的依赖性较强。     

“不+X”类双音节动词的词汇化

《现代汉语词典》(第5版)共收录了72个"不+X"类双音节动词,文章认为这72个动词不符合汉语双音词判定的意义标准,并对它们的成词过程进行了简单描写,研究认为:只有"不讳"和"不行"可以作为双音词收录,其他70个"不+X"类双音节动词都应该剔除。吕叔湘先生提出的"假如‘X’没有反义词‘Y’,那么‘不X’就是‘X’的反义词"的观点违反了充分条件假言判断的规则,不能用来证明"不+X"类双音节成分是词。     

耻感教育:“自律”与“他律”的契合

耻感教育不仅是外在他律的强制性教与学,更是内在的基本道德素质的自我完善和自我修养。研究耻感教育"他律"与"自律"的关系,尤其是道德"自律"与"他律"彼此间的契合点,使现实社会中的大学生摆脱道德自律之弱化趋势与困境,达成和谐的耻感教育修己方式,实现大学生的思想道德教育,尤其是耻感教育的和谐发展。     

ON THE THEORY OF ETHNIC CONFLICT

When considering engaging in conflict to secure control of a resource, a group needs to predict the amount of post‐conflict leakage due to infiltration by members of losing groups. We use this insight to explain why conflict often takes place along ethnic lines, why some ethnic groups are more often in conflict than others (and some never are), and why the same groups are sometimes in conflict and sometimes at peace. In our theory ethnic markers help enforce group membership: in homogeneous societies members of the losing group can more easily pass themselves as members of the winning group, and this reduces the chances of conflict as an equilibrium outcome. We derive a number of implications of the model relating social, political, and economic indicators such as the incidence of conflict, the distance between ethnic groups, group sizes, income inequality, and expropriable resources. One of the insights is that the incidence of ethnic conflict is nonmonotonic in expropriable resources as a fraction of total resources, with a low incidence for either low or high values. We use the model’s predictions to interpret historical examples of conflict associated with skin pigmentation, body size, language, and religion.     

沙箱技术比较

在计算机安全领域,沙箱(Sandbox)是一种程序的隔离运行机制,其目的是限制不可信进程的权限。本文以Chromium为基础,作者介绍了几种不同浏览器下的沙箱技术。     

Attribute control chart for some popular distributions

The binomial distribution is often used to display attribute control data. In this paper, a statistical model is settled for attribute control chart under truncated life test. By Burr X & XII, inverse Gaussian (IG), and exponential lifetime-truncated distributions, a Shewhart-type attribute control chart is built to display the data. The performance of attributed control chart constructed on truncated life test is evaluated by average run length, which compares the performance of all distributions. Our study arranges that IG is better distribution among all.     

教学中现代与传统媒体相结合的问题及策略

现代教学媒体的应用,带来了教学模式的变革与教学组织的多样性,使课堂教学结构发生了深刻的变革,教学质量与效率也得到了很大的提高。但是,现代多媒体并不是万能的,它有自身的不足,传统教学媒体也有其自身的优点,是现代多媒体无可替代的。所以,在教学中,教师必须根据教学内容的不同、教学对象和教学目标的特点,依据自身的教学特色,通过教学设计,合理地选择和运用教学媒体。实现现代教学媒体与传统教学媒体有效结合,提高教学效果。