研究委员会决议与60年代中期美国对华政策的调整

20世纪 6 0年代中期 ,美国对华政策有所调整。与此同时 ,美国在中国驻联合国代表权问题上的态度也有所松动。学术界对研究委员会决议在中国进入联合国过程中的作用问题尚缺乏研究。建立研究委员会是比利时、意大利等国家率先提出 ,在不得已的情况下美国同意并支持提案 ,这表明了美国在中国驻联合国代表权问题的态度有所松动 ,同时美国以此采取拖延的战术在一定程度上达到了阻止并延缓中国进入联合国的目的。     

College Students and the Diagnosis of Attention Deficit Hyperactivity Disorder

Abstract

Background: When H1N1 emerged in 2009, institutions of higher education were immediately faced with questions about how best to protect their community from the virus, yet limited information existed to help predict student preventive behaviors. Methods: The authors surveyed students at a large urban university in November 2009 to better understand how students perceived their susceptibility to and the severity of H1N1, which preventive behaviors they engaged in, and if policies impacted their preventive health decisions. Results: Preventive health behavior messaging had a mixed impact on students. Students made simple behavior changes to protect themselves from H1N1, especially if they perceived a high personal risk of contracting H1N1. Although policies were instituted to enable students to avoid classes when ill, almost no student self-isolated for the entire duration of their illness. Conclusions: These findings can help inform future decision making in a university setting to best influence preventive health behaviors.     

“N·眼／口”的配同组配及使用差异

“N·眼／口”这一对配同组配可以证明：形式上的配同组配反映语义特征的共性与差异。语义特征共性是配同组配存在的前提,而语义特征差异则决定配同组配存在的价值。“眼”与“口”不同语义特征也影响二者的语法功能,“口”因此具有准方位标属性。     

Estimation of Ordered Location Parameters: The Exponential Distribution

The problem of component wise estimation of ordered location parameters θ ₁ (θ ₁ ≤ θ ₂) of two independent exponential distributions is investigated. The scale parameters are assumed to be unequal but known. Independent random samples of unequal sample sizes are drawn from two populations and the estimators admissible among the mixed estimators of θ ₁ and θ ₂ are obtained. It is shown that the minimum risk estimators (MREs) of θ ₁ and θ ₂ without assuming θ ₁ ≤ θ ₂ are inadmissible when one does assume that θ ₁ ≤ θ ₂. The efficiencies of mixed estimators relative to MREs (without assuming θ ₁ ≤ θ ₂) are tabulated for equal sample sizes and equal scale parameters.     

现代汉语“上+N/NP”结构考察

“上+N/NP”是动词性结构,其句法功能主要作谓语或谓语中心语,但在一定条件下,还可以作主语、宾语、定语、状语和补语;动词“上”的语义源于其方位词语义“从低处到高处”,并且通过认知隐喻方式泛化引申,使“N/NP”语义类型多样化;“上+N/NP”结构既符合语用的经济性原则,又适应人们的认知需求。     

从"猪流感"到"甲型H1N1流感"——谈汉语引进术语的科学性和民族性

目前世界上正在流行的流感,最初被称为“猪流感”,又有多种命名,后来被称为“A（H1N1）”,汉语用“甲型H1N1”去指称。汉语对这一学科术语的引入具有科学性,又具有民族性,具有中文、英文合璧的意味。     

Some nonparametric precedence-type tests based on progressively censored samples and evaluation of power

In this paper, we consider the problem of testing the equality of two distributions when both samples are progressively Type-II censored. We discuss the following two statistics: one based on the Wilcoxon-type rank-sum precedence test, and the second based on the Kaplan–Meier estimator of the cumulative distribution function. The exact null distributions of these test statistics are derived and are then used to generate critical values and the corresponding exact levels of significance for different combinations of sample sizes and progressive censoring schemes. We also discuss their non-null distributions under Lehmann alternatives. A power study of the proposed tests is carried out under Lehmann alternatives as well as under location-shift alternatives through Monte Carlo simulations. Through this power study, it is shown that the Wilcoxon-type rank-sum precedence test performs the best.