地方本科院校硕士生综合表现与生源关系分析——基于A高校管理学院的实证研究

从硕士研究生的性别、本科学校层次及升学方式三个方面,系统分析地方本科院校A高校管理学院硕士研究生的综合表现与生源关系。研究发现地方本科院校硕士生中女学生整体综合表现优于男生,但男生拔尖比例更高。“双一流”生源的学生获一等和二等奖学金的综合比例高于非“双一流”院校,但这种差距在逐渐缩小。推免生生源占比偏低,并且在研究生期间整体表现良而不优,需要引起关注。生源与研究生综合表现之间关系复杂,没有必然联系,在重视提高生源质量的同时更重要的是研究生期间学校的培养和学生的努力。     

Reversed preservation of stochastic orders for random minima and maxima with applications

In this paper, reversed preservation properties of right spread order, total time on test order and increasing convex (concave) order when taking random minima and maxima are developed. In this context, reversed preservation properties of some ageing concepts are investigated under parallel (series) systems which are composed of a random number of i.i.d. components. Some applications in reliability and economics are given.     

On Non-parametric Estimation of the Survival Function with Competing Risks

The non-parametric maximum likelihood estimators (MLEs) are derived for survival functions associated with individual risks or system components in a reliability framework. Lifetimes are observed for systems that contain one or more of those components. Analogous to a competing risks model, the system is assumed to fail upon the first instance of any component failure; i.e. the system is configured in series. For any given risk or component type, the asymptotic distribution is shown to depend explicitly on the unknown survival function of the other risks, as well as the censoring distribution. Survival functions with increasing failure rate are investigated as a special case. The order restricted MLE is shown to be consistent under mild assumptions of the underlying component lifetime distributions.     

Concomitants in a Sequence of Independent Nonidentically Distributed Random Vectors

ABSTRACT

Concomitants of order statistics are considered for the situation in which the random vectors (X ₁, Y ₁), (X ₂, Y ₂),…, (X _n , Y _n ) are independent but otherwise arbitrarily distributed. The joint and marginal distributions of the concomitants of order statistics and stochastic comparisons among the concomitants of order statistics are studied in this situation.     

Some concepts of mult1variate dependence

Several types of positive dependence are shown to be equiv-alent to the concept of a distribution with a density which is TP₂ in pairs. Among these is the concept of m^?-positive depend-ence of Alam and Wallenius. Using this result, all relationships among many of the most important concepts of positive dependence are determined. Furthermore, an application of the equivalences of these types of positive dependence yields a results of Ahmed, Langberg, Leon and Proschan.     

当代中国人文学之“内外兼修”

20世纪90年代以来,中国的社会政治、经济、文化均发生巨大转变。处此巨变中的人文学,既面临前所未有的困境,亦有不少转机:在日渐"分离"的大学校园,社会科学发展迅猛,人文学则越发退居边缘,风光不再,已是不争的事实;但同时,由于十年来的大学扩招,接受高等教育的人数倍增,民众对人文学的兴趣转浓,与"国学热"形成相互呼应之势;而各高校对"素质教育"的提倡,和"通识课程"的逐渐落实,虽仍在不断的自我调整之中,但均以"人文学"为知识传授的核心,也为人文学预留了巨大的发展空间。人文学当前面临的最大问题,可能还不是其在大学中的地位相对下降,而是被按照工程或社会科学的模样进行的改造,各类学术工程和评审文化在大学里大行其道,其发展日趋数字化、模式化,使人文学特有的灵性和精神受到损害,变得平淡、僵硬、了无趣味。     

关于我国农民增收问题的探讨

从农业结构、农产品价格、生产成本、农民负担等方面对近几年农民收入增幅下降的原因进行了分析,并据此提出了调整农村经济结构、降低生产成本、减轻农民负担、增加农业投入等解决措施。     

影响我国民办教育机构上市因素分析

截至2010年,我国民办教育机构有11．9万所,但目前上市的却只有十几家,而且都是在国外上市。哪些因素影响了我国民办教育机构上市？本文分析影响我国民办教育机构上市的主要因素,通过解释结构模型方法找出关键性因素,对进一步完善民办教育政策提出建议,以期为准备上市的民办教育机构提供借鉴。     

胎儿半月板形态结构增龄性变化的实验研究

在光、电镜下观察4、6、8月龄胎儿膝关节半月板组织结构的变化,光镜下4月龄胎儿半月板血管丰富,随着胎龄的增长（8月龄）有减少趋势,仅在周边见到血管,软骨细胞也是由多到少,而胶原纤维则是由（4月龄）稀少、分散分布到（8月龄）致密呈束状平行排列,在电镜下观察到半月板表面膜性组织由无到有,条状隆起由不明显到明显的变化过程,各月龄组半月板表面都呆见到微细的小孔或空隙区。