On the equivalence of two approaches to simplicity in the analysis of block designs and some related results

Two seemingly different approaches to simplicity in the analysis of connected block designs, and their relationship to the concepts of balance are discussed.     

Optimum mixture designs in a restricted region

In a mixture experiment, the response depends on the proportions of the mixing components. Canonical models of different degrees and also other models have been suggested to represent the mean response. Optimum designs for estimation of the parameters of the models have been investigated by different authors. In most cases, the optimum design includes the vertex points of the simplex as support points of the design, which are not mixture combinations in the true non-trivial sense. In this paper, optimum designs have been obtained when the experimental region is an ellipsoidal subspace of the entire factor space which does not cover the vertex points of the simplex.     

胡适杂文的艺术初论

本文从解读胡适杂文的文本入手,从文体结构、论证方法、行文造句及文学手法的运用诸方面探讨胡适杂文的表现艺术,指出胡适的杂文有三个突出的艺术特点:其一,结构严密。论证环环紧扣,说理极为有力。其二,清楚明白。一是思想清楚,观点明确;二是语言显浅,明白通俗。其三,议论形象。一是勾勒形象,说理可感;二是善用比喻、富于幽默,全文既通俗浅白,也还生动形象。     

我国人口预期寿命的结构及影响因素研究—基于省级面板数据的分析

基于省级面板数据,本文对预期寿命结构及其影响因素问题进行研究。首先,文章分析了我国整体预期寿命及两性预期寿命的地理分布特性,随时间的变化特点,以及与经济发展水平的关系。然后,建立预期寿命的固定效应模型,分析不同影响因素与预期寿命的关系。研究发现经济发展水平、教育和卫生资源对男性和女性预期寿命会产生不同的影响,其中经济发展水平会显著影响女性预期寿命,而教育对男性预期寿命的影响更显著。由此,经济发展水平的提高会导致两性预期寿命差距的增加,而教育水平的提高和卫生资源投入的增加则可能会降低两性预期寿命的差距。     

中国利率调整对消费作用的实证分析

研究表明,中国利率的变化与国民消费水平增长呈现出一种反向变化的趋势,这一结果与传统的凯恩斯理论、永久性收入假说理论和随机游走理论等相悖,其主要原因是中国的城市消费和农村消费的异质性和“二元结构”特点,不具备上述理论的假设条件。利率机制目前还不是中国调解消费的理想工具,应考虑更多地使用非利率的其他金融手段。     

Design and implementation of an integrated production planning system for a pharmaceutical manufacturing concern in India

SmithKline Beecham (SBPI) is a major player in the Indian pharmaceutical industry. Though relatively small in terms of turnover, it has performed Pharmaceuticals (India) exceptionally well in terms ofprofitability and growth rate. The firm has substantial cash reserves. However, the firm operates in 'mass production' mode at present, with the established finished goods inventory norms being in the range of 1 to 1.5 months. Competitive pressure on the firm is now forcing it to move towards world class manufacturing and the application of concepts from MRP II, JIT and OPT is under consideration. This paper describes the considerations that went into the justification, design and implementation of an integrated production planning and control system in this situaion.     

The health consequences of trafficking in women in Mexico: findings from Monterrey city

There has been little research on the health consequences of trafficking in women in Mexico and this study examines the effects of trafficking in women. Twenty internally trafficked women were interviewed in Monterrey city, Mexico, during the years 2007 and 2008. Although the study found that trafficking of women in Mexico results from multi-causal factors, we found that in general trafficked women suffer a wide range of physical and sexual violence. This has direct consequences on their physical and mental health and in particular their sexual health.     

On the total sojourn time of particles in semi-markov compartmental system with branching particles

We consider a semi-Markov compartroental system with branching particles, Me study the total sojourn time of all the particles and obtain the asymptotic behaviour of its mean. We also discuss some special systems.     

Inference on unknown parameters of a Burr distribution under hybrid censoring

Based on hybrid censored data, the problem of making statistical inference on parameters of a two parameter Burr Type XII distribution is taken up. The maximum likelihood estimates are developed for the unknown parameters using the EM algorithm. Fisher information matrix is obtained by applying missing value principle and is further utilized for constructing the approximate confidence intervals. Some Bayes estimates and the corresponding highest posterior density intervals of the unknown parameters are also obtained. Lindley’s approximation method and a Markov Chain Monte Carlo (MCMC) technique have been applied to evaluate these Bayes estimates. Further, MCMC samples are utilized to construct the highest posterior density intervals as well. A numerical comparison is made between proposed estimates in terms of their mean square error values and comments are given. Finally, two data sets are analyzed using proposed methods.