GMM tests for the Katz family of distributions

Generalized method of moments (GMM) is used to develop tests for discriminating discrete distributions among the two-parameter family of Katz distributions. Relationships involving moments are exploited to obtain identifying and over-identifying restrictions. The asymptotic relative efficiencies of tests based on GMM are analyzed using the local power approach and the approximate Bahadur efficiency. The paper also gives results of Monte Carlo experiments designed to check the validity of the theoretical findings and to shed light on the small sample properties of the proposed tests. Extensions of the results to compound Poisson alternative hypotheses are discussed.     

基于SWOT分析的我国服务贸易发展战略思考

随着国际服务贸易发展,各国都将发展本国服务业作为参与国际竞争的战略重点。我国服务贸易发展水平落后,优势依然集中在劳动力和自然资源方面。中国加入WTO后,服务业对外开放,面临内外威胁,但是服务贸易的自由化也同时为我国发展服务贸易提供了机遇。在SWOT分析基础上,本文根据我国服务贸易的优势、劣势以及面临的机遇和威胁,提出了服务贸易发展战略的思考。     

大学生体成分和体质健康相关性的研究

为探讨大学生身体成分特征与体质健康的关系,运用身体测量、数理统计等方法对大学生的体成分和体质健康指标进行了测试和分析研究.结果显示,目前大学生中,超重或肥胖的学生占有相当的比例,体脂百分比总体均值偏高.肺活量/体重指数、立定跳远、握力/体重指数与体脂百分比呈非常显著性负相关,台阶指数和体脂百分比之间没有显著的相关关系.超重或肥胖对大学生的肺功能及有氧能力、下肢爆发力、上肢肌肉相对力量具有非常显著的负面影响.体脂百分比的增大对大学生的身体机能和素质的危害是非常明显的.     

2001—2002赛季CBA与NBA技术统计的比较与分析

对 2 0 0 1— 2 0 0 2赛季CBA与NBA各项技术进行了统计比较与分析 ,建议CBA在应有的基础上继续努力 ,提高球员的身体素质和技术能力 .     

Local influence analysis in the growth curve model with Rao's simple covariance structure

In this paper we discuss the likelihood-based local influence in a growth curve model with Rao's simple covariance structure. Under an abstract perturbation, the Hessian matrix is provided in which the eigenvector corresponding to the maximum absolute eigenvalue is used to assess the influence of observations. Specifically, we employ covariance-weighted perturbation to demonstrate the use of the proposed approach. A practical example is analysed using the proposed local influence approach.     

坩埚热导率对晶体生长温度场的影响

本文通过有限元数值方法计算了坩埚热导率对晶体生长温度场的影响,指出当坩埚热导率大于晶体材料的热导率时,生长区域的纵向温梯会有大幅度减小,反之,温梯变化较小。并且认为当坩埚侧面与环境的热交换系数很大时,坩埚热导率的影响作用变小。并指出坩埚热导率可以通过热处理及其他手段予以调节。     

非传统安全视角下的云南跨界民族问题

冷战结束后,云南边境地区的安全因素发生了重大变化,安全威胁由防御邻国向我国侵犯等传统安全要素逐渐转向防止各种跨国犯罪和贩毒走私为特征的非传统安全,跨界民族问题成为引发云南边疆地区非传统安全的重要因素之一,给边疆安全带来前所未有的挑战。从云南跨界民族问题与非传统安全关系入手,分析由云南跨界民族所产生的非传统安全问题,提出解决云南跨界民族问题的一些设想,是十分必要的。     

论个体人力资源开发的基本内容

本文认为,基于人力资本理论的个体人力资源开发就是对个人进行人力资本投资以提高工作所需人力资本水平改进工作绩效的有计划的系列的活动。文章认为个体人力资源开发的基本内容是知识开发、技能开发和能力开发。     

Low dose risk estimation via simultaneous statistical inferences

Summary.  The paper develops and studies simultaneous confidence bounds that are useful for making low dose inferences in quantitative risk analysis. Application is intended for risk assessment studies where human, animal or ecological data are used to set safe low dose levels of a toxic agent, but where study information is limited to high dose levels of the agent. Methods are derived for estimating simultaneous, one-sided, upper confidence limits on risk for end points measured on a continuous scale. From the simultaneous confidence bounds, lower confidence limits on the dose that is associated with a particular risk (often referred to as a bench-mark dose ) are calculated. An important feature of the simultaneous construction is that any inferences that are based on inverting the simultaneous confidence bounds apply automatically to inverse bounds on the bench-mark dose.     

篮球运动技术发展模式的研究

论述了推动篮球技术模式的因素——攻守对抗矛盾、技战术矛盾、规则与技战术矛盾、训练学因素、现代科学技术、实践与认识等几个部分,用系统论的观点探讨了推动篮球运动的技术模式和篮球运动技术的发展模式,以指导篮球教学与训练。