Likelihood inference for Type I bivariate Pólya–Aeppli distribution

This article discusses likelihood inference for the Type I bivariate Pólya–Aeppli distribution. The Type I bivariate Pólya–Aeppli distribution was derived by Minkova and Balakrishnan by using compounding with geometric random variables and the trivariate reduction method. They also discussed the moment estimation of the parameters of the Type I bivariate Pólya–Aeppli distribution. Here, we carry out a simulation study to compare the performance of the developed Maximum Likelihood Estimation (MLE) method with the moment estimation. The obtained results show that, through the MLEs require more computational time compared to the moment estimates (MoM), the MLEs perform better, in most of the settings, than the MoM. Finally, we apply the Type I bivariate Pólya–Aeppli model to a real dataset containing the frequencies of railway accidents in two subsequent six-year periods for the purpose of illustration. We also carry out some hypothesis tests using the Wald test statistic. From these results, we conclude that the two variables belong to the same univariate Pólya–Aeppli distribution, but are correlated.     

Construction of circular partially balanced-Repeated measurement designs using cyclic shifts

Repeated measurement designs are widely used in medicine, pharmacology, animal sciences and psychology. These designs balance out the residual effects. The situations where balanced repeated measurements designs require a large number of the subjects, partially-balanced repeated measurements designs should be used. In this paper some infinite series are developed which provide circular partially-balanced repeated measurement designs for p (periods) even. Catalogues of circular partially-balanced repeated measurement designs are also presented for v (treatments) ≤ 100 with p = 5, 7 & 9.     

从分类研究到类型研究——兼论中国电视剧类型研究的意义与方法

当今中国电视剧的创作日益向类型化方向发展,电视剧研究方法与研究模式也需要随之而发展。然而电视剧类型研究的理论来源及研究范式应该是研究中首先要确定的前提。本文主要探讨与电视剧类型相关的几个问题：电视剧类型研究的理论起点,电视剧类型的划分原则及电视剧类型研究的具体方法。力图为今后的电视剧研究提供参照。     

谈问题设置法在化学教学中的应用

结合在化学教学中的实践,介绍“问题设置法“的4个特征,并论述如何将问题设置,使教与学融为一体,达到提高教学质量的目的.     

Estimation of weibull parameters for grouped data with competing risks

We consider the problem of estimating Weibull parameters for grouped data when competing risks are present. We propose two simple methods of estimation and derive their asymptotic properties. A Monte Carlo study was carried out to evaluate the performance of these two methods.     

新形势下数学物理方法教学模式改革探索

《数学物理方法》是理工科专业的一门基础课程，其对学生后续课程的学习以及应用能力的培养具有重要作用。为了适用新的教学形势，体现新时期的教学特点，并不断提高课程的教学质量和教学效果，文章介绍了该课程教学改革的一些做法，期冀对同行教师有所助益。     

生物新课程中讲授法的变革与创新

生物新课程实验中，讲授法发生了许多变革，出现了创新，主要体现在讲授的形式上、讲授的技巧上、讲授法与自主学习活动的灵活组合上，本文从实践角度评述了这些变革与创新．     

资源租金核算理论与方法研究

 本文在对自然资源价值核算的不同方法予以归纳的基础上，对这些方法得以实施的共同基础—资源租金的核算问题提出了一些不同的观点。认为在联合国等国际组织所发布的《环境经济综合核算体系》（SEEA2003）所推荐的三种资源租金的核算方法中，其中两种“间接”推算法存在理论缺陷，并从理论与实证两个方面进行了论证。     

Parameter estimation of the generalized Pareto distribution—Part I

The generalized Pareto distribution (GPD) has been widely used in the extreme value framework. The success of the GPD when applied to real data sets depends substantially on the parameter estimation process. Several methods exist in the literature for estimating the GPD parameters. Mostly, the estimation is performed by maximum likelihood (ML). Alternatively, the probability weighted moments (PWM) and the method of moments (MOM) are often used, especially when the sample sizes are small. Although these three approaches are the most common and quite useful in many situations, their extensive use is also due to the lack of knowledge about other estimation methods. Actually, many other methods, besides the ones mentioned above, exist in the extreme value and hydrological literatures and as such are not widely known to practitioners in other areas. This paper is the first one of two papers that aim to fill in this gap. We shall extensively review some of the methods used for estimating the GPD parameters, focusing on those that can be applied in practical situations in a quite simple and straightforward manner.     

引入情感教学法,增强高校思想道德课的实效性

为了增强高校思想道德课的实效性,本文主张引入情感教学法。文章介绍了情感教学法的涵义和教学原则以及情感源点。情感教学法增强思想道德课实效性的作用在于:首先,通过增进大学生对道德观念和道德规范的认知及其內化、陶冶大学生的道德情操、塑造大学生的道德意志行为,来增强大学生的思想道德素质;其次,情感教学法有助于促进大学生身心健康和全面发展。