Comparing search and estimation performances of designs based on a compound criterion

Since the introduction of the search design by Srivastava [Designs for searching non-negligible effects. In: Srivastava, editor. A survey of statistical design and linear models. Amsterdam: North-Holland, Elsevier; 1975. p. 507–519], construction of such designs has been considered by many researchers. The efficient performances of constructed search designs in terms of parameter estimation and search ability of parameters have also been investigated by several authors. They have proposed suitable optimality measures such as DD- and AD-optimality for estimation in the early stage of search design construction. Moreover, since 1990s, some criteria have been developed to evaluate search performance of a design. Although these criteria are useful none of them is able to evaluate both estimation and search efficiency of a design simultaneously. In this paper, we propose dual-task criteria to deal with searching and estimating performances of search designs. These compound criteria are weighted multiplication of estimation and search suitable criteria. They will be used for design comparison and the results will be presented.     

凌濛初的尚奇观与"二拍"之奇

从“二拍”的书名、序言、小引以及小说中的议论可以看出,尚奇是凌初小说理论的核心内容,凌初主张小说写耳目之内、日用起居中的新奇之事,反对写耳目之外的荒诞不经之事,凌濛初的尚奇观在小说批评史上极富理论价值和创新意义。凌濛初认为“二拍”是一部奇书,“二拍”的新奇主要表现在三个方面,首先是题材的新奇,其次是情节的新奇,再次是观念的新奇。     

试论市场经济条件下农业科技成果档案的开发与利用

加速农业科技档案成果转化是世界各国发展农业的共同目标与追求 ,根据农业科技成果档案的五大特点 ,农业科技档案在农业产业化中有四大作用。科技档案信息是农业科研决策的依据 ,加强其开发利用是促进科技成果转化为生产力的手段 ,是推动社会经济飞速发展的强大动力。应通过工作实践找到并总结出一条开发利用农业科技成果档案、推动社会经济发展进程的有效途径     

浅谈创造的心理深度

创造是一种人工性的从无到有的实现过程，是人类特有的社会活动，具有明显的新颖性和独特性。动机与兴趣、想象与直觉、感觉与思维、灵感与哲学、胆识与情结等人的思维感情心理因素是激发个人创造力的重要内容。     

新时期思想政治工作的社会适应性

面对新时期思想政治工作中出现的新情况新问题 ,思想政治工作必须增强社会适应性 ,即需实现科技化 ,主体化 ,实现观念、内容、方法的创新     

人类智力与科技进步的关系初探

人类智力是推动科技进步的内在动力 ,科技进步是决定人类智力发展的外部条件。人类智力是现代社会科技进步最根本的生长点 ,知识传播和知识创新活动是人类智力推动科技进步的根本途径     

浅谈科技服务中介与知识共享

本文以科技中介机构为研究对象，主要从科技中介机构内部，科技中介机构与同行业组织之间，科技中介机构与企业、大学和科研机构之间三方面来分析与探讨知识共享。     

支持多关键字的P2P搜索研究

传统的P2P系统是基于单特征词搜索的，且不支持语义，存在一定的局限性。提出了可变长数组模型，解决了P2P系统中多特征词搜索的问题；标识符空间的分割，使相同领域的文档在邻近的节点聚集，提高了搜索速度；本体技术的应用，使P2P系统能够理解搜索请求，有利于查全率的提高。     

Using adaptive weighted least squares to reduce the lengths of confidence intervals

The author proposes an adaptive method which produces confidence intervals that are often narrower than those obtained by the traditional procedures. The proposed methods use both a weighted least squares approach to reduce the length of the confidence interval and a permutation technique to insure that its coverage probability is near the nominal level. The author reports simulations comparing the adaptive intervals to the traditional ones for the difference between two population means, for the slope in a simple linear regression, and for the slope in a multiple linear regression having two correlated exogenous variables. He is led to recommend adaptive intervals for sample sizes superior to 40 when the error distribution is not known to be Gaussian.     

科技论文评价不宜“以刊论文”

分析了目前科技论文的评价现状,指出了其中存在以刊论文,用核心期刊、期刊影响因子来简单判断科技论文的学术质量这一弊端,提出应尊重同行专家的意见,以实事求是的态度对科技论文作出客观和公正的评价。