二维XY模型动力学平均相距〈D（t〉与时间t关系的计算和分析

考察了二维XY模型的两种组态按Metropolis动力学随时间的演化，教育处得到了其在平方点阵上的动力学平均相距＜D（t）＞随时间t的变化关系，该＜D（t）＞－t图作了分析。     

中国古代均平文化论纲

在中国古代社会,平均观念渗透在中国传统文化的各个思想领域,是各种政治思想、社会思想、伦理思想乃至经济思想的重要文化支点。均平文化的基本内涵,包括政治平均、社会平均、经济平均、均平之德等几个最基本的方面。均平作为一种文化,它的思想价值在于追求社会的和谐与均衡。这种文化,还被赋予了天地自然之德的自然属性,是人对自然德性的效法,因此有着天经地义的正当性。     

我国“刘易斯转折点”的测定及其对策研究

“刘易斯转折点”是我国社会经济发展的重要时点。这里通过估算得出．我国将在2013年左右越过了“刘易斯第一转折点”,在2026年左右迎来“刘易斯第二转折点”。而要顺利地跨越“刘易斯转折点”．转变我国经济发展方式才是惟一出路。     

Reducing sample size needed for cox-proportional hazards model analysis using more efficient sampling method

Abstract

In general, survival data are time-to-event data, such as time to death, time to appearance of a tumor, or time to recurrence of a disease. Models for survival data have frequently been based on the proportional hazards model, proposed by Cox. The Cox model has intensive application in the field of social, medical, behavioral and public health sciences. In this paper we propose a more efficient sampling method of recruiting subjects for survival analysis. We propose using a Moving Extreme Ranked Set Sampling (MERSS) scheme with ranking based on an easy-to-evaluate baseline auxiliary variable known to be associated with survival time. This paper demonstrates that this approach provides a more powerful testing procedure as well as a more efficient estimate of hazard ratio than that based on simple random sampling (SRS). Theoretical derivation and simulation studies are provided. The Iowa 65+ Rural study data are used to illustrate the methods developed in this paper.     

农村专业技术协会的组织制度与运行机制

介绍了农村专业技术协会的组建原则与方法、民主管理制度、利润分配制度及其产权结构安排,并从决策机制、激励机制、积累与发展机制、约束机制等方面介绍协会的运行机制,探讨其存在的主要问题,并提出进一步发展的政策建议     

红皮洋葱新品种“昌激99-3“的一道清高效栽培技术

本试验用"一道清"的高产长效施肥技术,在激光诱变选育出的红皮洋葱新品种"昌激99-3"上施用,通过与常规施肥试验的对比,得出使用这种施肥技术可显著提高肥料利用率25％左右,能满足洋葱生长全过程的需要;还能降低洋葱早期抽苔率13％左右,改善洋葱品质,产量提高10％以上,施肥上用工减少3/4以上。在生产应用上有极好的前景。     

Estimation of the means of the bivariate normal using moving extreme ranked set sampling with concomitant variable

The estimation of the means of the bivariate normal distribution, based on a sample obtained using a modification of the moving extreme ranked set sampling technique (MERSS) is considered. The modification involves using a concomitant random variable. Nonparametric-type methods as well as the maximum likelihood estimation are considered. The estimators obtained are compared to their counterparts based on simple random sampling (SRS). It appears that the suggested estimators are more efficient. Also, MERSS with concomitant variable is easier to use in practice than the usual ranked set sampling (RSS) with concomitant variable. The issue of robustness of the procedure is addressed. Real trees data set is used for illustration.     

《微机接口技术》实验教学的改革与探索

针对《微机接口技术》课程特点,介绍了对其实验教学在内容、方法、考核上进行的一些改革与探索,旨在提高实践教学效果、加强对学生实践能力和创新能力的培养。     

中美高校知识产业化影响因素的比较和启示

对中美大学知识产业化的现状和知识产业化的法律环境、技术转让机构和从业人员、技术信息服务等方面的因素进行了比较,并提出我国高校科研成果转化中应注意的几点启示。     

等热流热绕流运动密度场的加权残数解

本文给出了等热流条件下热绕流运动密度场的加权残数解，并且在一给定的工况下计算了相应的密度场，所得结果与数值解及实验情况相吻合．该解法具有解析结构清楚、计算工作量小的特点．