泊松分布中参数的经典估计与Bayes估计的相等关系

文中证明了泊松分布中未知参数的矩估计和最大似然估计,一定存在一个先验分布,使其贝叶斯估计就是该经典估计的结论.     

识别含水层参数的单纯形-混沌优化算法

以泰斯公式为基础,将单纯形-混沌优化算法应用于分析抽水试验数据,求解含水层参数函数优化问题。采用具有搜索速度快、局部搜索能力强等优点的单纯形算法与全局搜索能力强的混沌优化算法结合的单纯形-混沌优化算法。数值实验结果表明：单纯形-混沌优化算法可有效地应用于求解含水层参数函数优化问题;待估参数导水系数的初始取值范围、粗搜索次数和混沌序列长度对算法的收敛速度有一定的影响,但不会影响算法的收敛性。     

Relationship Between Teacher Factors and Student Achievement： A Correlational Study of Secondary Schools

Teachers always played a significant role in the intellectual and moral development of students by using various techniques, assessments, and methods to improve student achievement in school＇s subjects. This study therefore focuses on the effect of teacher factors, such as assessment interval, communication language, the distance of residence, and the teacher＇s personal characteristics （gender, age, academic and professional qualification, designation, experience, and in-service training） on the 9th grade students＇ achievement in three subjects （English, Chemistry, and Mathematics at secondary level）. The population of the study is comprised of all ＂public sector＂ secondary schools, male and female teachers, and boy and girl students. A total number of 16 secondary schools （eight for boys and eight for girls）, 114 secondary school teachers （66 males and 48 females）, and 2,404 students （1,400 boys and 1,004 girls） were selected through purposive sampling techniques. Multiple statistical procedures, Spearman and Pearson correlation, mean, and standard deviation were employed to obtain stronger validity to the study. The results of the study identify weak and negative weak relationship between most of the teacher factors and student achievement in three subjects but the relationship between students＇ background and learning achievement in all three subjects were found positively correlated.     

一类乘积形式的差分不等式

建立了一类新的差分不等式,利用差分定义、求和技巧、差分方程比较原理,给出了不等式中未知函数的估计,推广了已有的结果.     

金融时间序列中同积向量的充分改进最小二乘估计研究

以金融时间序列中同积向量的充分改进为对象,分析充分改进的最小二乘估计。在统计量的极限分布非标准时,构造充分改进的最小二乘估计。研究表明,改进的最小二乘估计方法是一种非参数方法,有助于充分的最小二乘估计。     

港口吞吐量抽样调查方案设计

讨论了抽样调查在港口吞吐量调查中的应用前景，分析了港口吞吐量抽样调查方案设计的各个环节，包括：方案设计的原则、技术方法、抽样公式、调查时间、分层确定、季节变动处理和非抽样误差控制等。     

指导发现式教学模式在健美操课中的运用

论述了指导发现式教学模式在健美操课中的运用程序与实现环境等原理,并在其对健美操中的运用进行了分析.     

《情报学报》与我国情报学发展(Ⅱ)--《情报学报》创刊20年来引用文献的计量分析

《情报学报》是公认的我国情报学权威期刊 ,不仅发表了大量情报学论文 ,同时其引用文献更是覆盖了中外情报学及其相关领域的重要文献。其引用文献的数量、语种、类型、年代分布、学科分布、来源期刊、自引等数据不仅可以客观公正地评价《学报》的学科地位 ,也可以更加全面地把握我国情报学发展的动态过程、特点和规律 ,以及与相关学科的关系     

Demand for and productivity analysis of Turkish public theater

We estimate a demand function for live theater provided by the General Directorate of State Theaters in Turkey. We show that demand is more elastic in less developed cities, that attendance is not significantly affected by various qualitative variables, and that the government's practice of offering free passes to government officials is an ineffective way of increasing paid attendance. Comedies and musicals both show significantly higher attendance. Having a Turkish author does not significantly affect attendance. Having a known author significantly increases attendance for more developed cities but not for less developed cities. Being the opening season significantly reduces attendance in less developed cities but has no effect in more developed cities. We also present evidence of inefficiency in state theaters in Turkey through a performance of plays equation in which we evaluate the determinants of the number of performances per play.     

桥式起重机结构件测试中的若干问题

为了使桥式起重机的寿命管理措施更切合实际，必须提高桥机的强度和刚度测试的精度。文中提出了现场测试中可以采用的一些提高精度的措施和方法。