"过客 "与 "独语者 "--鲁迅《野草》和何其芳《画梦录》比较研究

《野草》和《画梦录》分别是鲁迅和何其芳具有重要意义的散文诗作品。他们在思想上具有相同的精神特质 ,就是知识分子在革命低潮期找不到出路的孤独和彷徨。但是二者又有着本质的不同。同时 ,二者在艺术表现和艺术渊源以及艺术影响方面有相似和相异之处     

Certain Inverse Multivariate Hypergeometric and Multinomial Distributions

A sample is drawn from a population in such a way that it contains at least certain numbers from certain of its subpopulations. This paper obtains the frequency function of the number of units in the sample and its distribution over the subpopulations, and suggests some applications.     

英语写作中应用正交实验进行偏误分析的研究

运用正交实验对英语专业学生进行了英语写作偏误分析的研究.结果表明各种偏误的出现频率是有一定顺序的.有针对性地加强对出现频率较高的偏误的练习,可以减少偏误的发生,提高学习者的英语写作水平.     

粉防己多糖的提取工艺优选

目的:利用正交试验,研究粉防己多糖的最佳提取条件。方法:首先采用L8(4×24)正交试验研究单糖和寡糖的最佳提取条件。其次用提尽单糖和寡糖的残渣以水作溶剂提取多糖。按L9(34)正交试验表安排研究多糖的提取条件。结果:多糖的最佳提取条件为:提尽单糖和寡糖的残渣用20倍溶媒(水)浸泡24h后,于100℃提取3h,重复提取一次。方差分析显示,4个因素均有显著性差异(p<0.01)。结论:利用提尽单糖和寡糖的残渣研究多糖的提取条件,具有药材用量少、操作简单、节省时间和试剂的优点。     

安徽省老年人非正式照顾城乡对比研究

人口老龄化是当今中国人口发展的主要问题之一,安徽省也不例外.安徽省在2000年就成为典型的老年型省份,人口老龄化问题突出.人口老龄化发展的趋势促使学术界开始重视老年人非正式照顾研究.结合"安徽省城乡老年人非正式照顾状况调查"的相关数据分析老年人非正式照顾的城乡差异,提出安徽省城乡老年人非正式照顾的建议.     

Asymptotic Results for the MPL Estimators of the Contact Process of Order p

Let X be a discrete time contact process (CP) of order p on Z ² as defined by Durrett and Levin (1994 Durrett , R. , Levin , S. A. ( 1994 ). Stochastic spatial models: a user's guide to ecological applications . Phil. Trans. Roy. Soc. Lond. B 343 : 329 – 350 .[Crossref], [Web of Science ®] , [Google Scholar]), that is a CP where the function of birth takes p different values. We study the maximum marginal pseudo-likelihood (MPL) estimator of the model based on space-time evolution of X, that is, T + 1 successive observations of X on a finite subset S of sites. When T → ∞, this estimator is consistent and asymptotically normal for a non vanishing supercritical CP. We also propose a statistical test for the parameters of the model and verify the asymptotic results by some simulation studies.     

On the Estimation of the Probability Density by Trigonometric Series

We present in this article an estimator based on a new orthogonal trigonometric series. We give its statistical properties (bias, variance, mean square error, and mean integrated square error) and the asymptotic properties (convergence of variance, convergence of the mean square error, convergence of the mean integrated square error, uniform convergence in probability, and the rate of convergence of the mean integrated square error). The comparison by simulation on a test density between the estimator obtained from a new trigonometric series with Fejer estimator also based on orthogonal trigonometric series, shows that our estimator is more performant in the sense of the mean integrated square error.     

On Stein Identity,Chernoff Inequality,and Orthogonal Polynomials

In this article, we present a general method for deriving Stein-like identity and Chernoff-like inequality based on orthogonal polynomials. In order to illustrate our method, some applications are given with respect to normal, Gamma, Beta, Poisson, binomial, and negative binomial distribution, not only for random variables but also for random vectors, resulting corresponding Stein-like identity and Chernoff-like inequality are obtained consequently. Within our best knowledge, some of our matrix version results are new in the literature. In addition, forward difference formulae of Charlier polynomials, Krawtchouk polynomials and Meixner polynomials, Stein-like identity, and Chernoff-like inequality with respect to Beta distribution, as well as Rodrigues formula of Meixner polynomials are also prepared in the first time within our limited information. Interestingly, as far as normal, Gamma, Beta, Poisson, binomial, and negative binomial distribution are concerned, we found that their Stein-like identity and corresponding Chernoff-like inequality are related closely, by examining their Rodrigues formula.     

A Simple Method for Obtaining Minimum Aberration Designs

Minimum aberration designs are preferred in practice, especially when it is desired to carry out a multi-factor experiment using less number of runs. Several authors considered constructions of minimum aberration designs. Some used computer algorithms and some listed good designs from the exhausted search. We propose a simple method to obtain minimum aberration designs for experiments of size less than or equal to thirty-two. Here, we use an ordered sequence of columns from an orthogonal array to design experiments and blocked experiments. When the method is implemented in MS Excel, minimum aberration designs can be easily achieved.