社会角色理论视域下高校问题学生行为失范

高校"问题学生"行为失范已得到社会的普遍关注,基于前人研究的基础,立足客观实际,开辟新视角,将社会角色理论引入对这一问题的研究,不仅对"问题学生"和"行为失范"进行了重新界定,从角色转换、角色冲突、角色错位、角色失败四个方面分析了高校"问题学生"行为失范产生的缘由,并提出了相应的对策。     

Model selection consistency of U-statistics with convex loss and weighted lasso penalty

In the paper we consider minimisation of U-statistics with the weighted Lasso penalty and investigate their asymptotic properties in model selection and estimation. We prove that the use of appropriate weights in the penalty leads to the procedure that behaves like the oracle that knows the true model in advance, i.e. it is model selection consistent and estimates nonzero parameters with the standard rate. For the unweighted Lasso penalty, we obtain sufficient and necessary conditions for model selection consistency of estimators. The obtained results strongly based on the convexity of the loss function that is the main assumption of the paper. Our theorems can be applied to the ranking problem as well as generalised regression models. Thus, using U-statistics we can study more complex models (better describing real problems) than usually investigated linear or generalised linear models.     

高校少数民族毕业生就业问题及对策研究——以西南民族大学为例

大学生就业问题近年来成为社会各界关注的热点问题,少数民族大学毕业生的就业问题因其既具有共性,又带有特性,更应成为关注的焦点。本文基于对西南民族大学少数民族毕业生就业问题的调研,发现当前成都地区高校少数民族毕业生一定程度存在热衷大城市就业,沟通能力相对不足,从事工作与所学专业不对口,易受到不公对待等就业问题。究其原因,我们认为与少数民族大学毕业生的传统择业观、汉语水平、学校的专业设置以及用人单位的不当认识有关。为此,本文提出政府应加大对少数民族大学毕业生就业的关注程度;学校应提高少数民族大学生的综合素质;社会应创造公平公正的就业环境;少数民族大学生应提升自身能力、转变择业观念等相关对策建议。     

外国新闻史教材存在问题及对策分析

外国新闻史是新闻传播类专业本科阶段的必修课,师生共同关心教材的选用。综观目前正规出版的教材,问题不容忽视,包括翻译不规范、基本史料表述不一、史观带有浓厚的意识形态色彩等。这些问题给学生带来困惑,给教学带来困难。解决的办法首先是要重视规范,遵守约定俗成的规则,其次要改变既有思维,学会客观、理性地对待他国新闻传播史。     

An economic model for the quality selection problem

The object of an economic model for the quality selection problem is to select the best parameter value for an input quality characteristic (X) so that the quality loss incurred on an output quality characteristic (Y) is minimized. The relation function between Y and X is assumed to be known throughout the article. In the work of Taguchi's experimentations, the selection of best parameter values is solved by two-step optimization when Y is adjustable. In the article, it is further extended to the case where Y is non-adjustable. An economic quality selection model with a general relation function is proposed based on a Taylor-series method for both adjustable and non-adjustable cases. A special case of a quality selection model with a quadratic relation function is also studied. A circuit example provided by Taguchi is presented to illustrate the use of this model.     

Exact and approximate distributions for linear contrasts of means and variances

A Bayesian analysis is presented for the K-group Behrens-Fisher problem. Both exact posterior distributions and approximations were developed for both a general linear contrast of the K means and the K variances, given either proper diffuse or informative conjugate priors. The contrast of variances is a unique feature of the heterogeneous variance model that enables investigators to test specific effects of experimental manipulations on variance. Finally, important-differences were observed between the heterogeneous variance model and the homogeneous model.     

Sums of powers of binomial coefficients

An asymptotic series for sums of powers of binomial coefficients is derived, the general term being defined and usable with a computer symbolic language. Sums of squares of coefficients in the symmetric case are shown to have a link with classical moment problems, but this property breaks down for cubes and higher powers. Problems of remainders for the asymptotic series are mentioned. Using the reflection formula for I'(.), a continuous form for a binomial function is set up, and this becomes oscillatory outstde the usual range. A new contmued fraction emerges for the logarithm of an adjusted sum of binomial squares. The note is a contribution to the problem of the interpretation of asymptotic series and processes for their convergence acceleration.     

关于留数定理的一个推广

研究了留数定理的有关问题,通过举例论证和归纳推理等证明方法,得到了单个留数定理的一个推广结论,最后将此结论应用于一些积分问题中.     

Asymptotocally nonparametric tests with censored paired data

A class of asymptotically nonparametric test with contains a test proposed by Wei(1980), is considered for testing the equality of two continuous distribution funcitons when paired observations are subject to arbitrary right censorship. It is shown that under the null hypothesis each test statistic converges in distribution to the standard normal random variable. Furthermore. the Monte Carlo simulation results indicate that some tests in this class are more powerful than Wei's test. A generalization to incomplete censored paired data is also included.     

论唐君毅早期思想中的生死问题意识

唐君毅作为一位早慧型的哲学家,在早期生活经历中就有了多次对生死离别之事的强烈感受和生命体验;在他早期的思想创造中,这些体验形成了他自觉的生死问题哲学意识和生死哲学思想;这些意识和思想贯彻其终身,构建出一套完整的儒家生死哲学系统。