求解资源约束项目调度问题的启发式算法综述

本文综述了求解RCPSP的启发式算法.首先在对各种优先权规则进行归纳的基础上,概述基于优先权规则的RCPSP启发式算法研究现状;其次,综述项目进度的表述方式及常用超启发式策略,汇总求解RCPSP的超启发式算法的研究成果.此外,简要介绍除上述两大类启发式算法之外的其他几种启发式算法;最后,对全文进行总结,并指出该领域几个有希望的研究方向.     

“中国家庭经济与生育研究”抽样调查方案及目标量估计方法

本文论述了“中国家庭经济与生育研究”全国抽样调查中用聚类方法对全国２５省（市、区）和农村发达与落后地区进行分层,并采用多阶多次分层抽样;给出了在此方案下各层次目标量的估计方法和估计公式的变换形式．     

二维平衡单水平轮换设计及其广义组合估计方法研究

针对国内外现行单水平轮换调查存在的一系列问题,本文提出二维平衡单水平轮换模式设计及其广义组合估计方法。在这套设计方法中,将轮换偏差和两类相关关系引入到广义组合估计量公式中,提高了估计量的准确性,同时在连续性的多目标调查下还应用最优化方法确定一套最优权重系数,使得抽样调查的整体精度达到最高,同时又能够调整权重,满足各类目标量精度高低的要求。这套系统化、理论化的设计方法将为我国今后更好地开展各类单水平轮换调查提供理论指导。     

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采用精密工程测量技术对EAST装置主机关键部件装配位置进行了装配过程检测，并建立了相应的测量控制网。通过利用合适的控制测量方案，使得EAST装置关键部件的装配位置精度达到了设计要求。     

The seminal literature of nanotechnology research

A generally weak area in research papers, reports, and reviews is the complete identification of seminal background documents that formed the building blocks for these papers. A method for systematically determining these seminal references is presented. Citation-assisted background (CAB) is based on the assumption that seminal documents tend to be highly cited. Application of CAB to the field of nanotechnology research is presented. While CAB is a highly systematic approach for identifying seminal references, it serves as a supplement and is not a substitute for the judgment of the authorsThe views in this paper are solely those of the authors, and do not represent the views of the Department of the Navy or any of its components, or the Institute for Defense Analyses     

基于社会敏感问题的问卷调查方案设计与分析

利用概率论与数理统计方法,以对酒后驾车现象为例,就社会敏感问题的问卷调查方案设计,建立数学模型,并对模型结果进行分析.     

Survey of Chalcogenide Superconductors

The thread that runs through all research in the field of superconductivity is new physics through discovery of new materials. The knowledge of superconducting materials has become voluminous and complex. The comprehensive review of the superconducting materials is of particular importance. The main purpose of this report is to present the results of classification for chalcogenide superconductors. Superconducting critical temperature T_c, crystal-structure type and the references proper to these compounds are summarized. Brief survey of the superconductivity in chalcogen elements is also given. Furthermore, as representative sulfide and selenide, superconducting characteristics of CuRh₂S₄ and CuRh₂Se₄ will be shown.This revised version was published online in November 2005 with corrections to the Cover Date.     

Study on the Methyl Migration of 10-Methoxy-5,10-dihydrophenophosphazine 10-oxide

The title compound (1) was treated with NaH at room temperature in anhydrous DMF to give a sodium salt (containing nitrogen anion)which could shift the methyl group from oxygen to nitrogen atom to form N-methyl phosphinic acid as the reaction temperature was increased to 120 ℃.Three nitro derivatives containing 5,10-dihydrophenophosphazine ring system were prepared for the investigation on the above reaction mechanism which would be possible regarded as a special inter-molecular substitution.viz.,the nucleophilic nitrogen anion from one molecule of 1 attacked the cabon atom of the O-methyl of another 1.In addition,the chemical structures of seven compounds containing 5,10-dihydrophenophosphazine ring system involved in the experiment were confirmed by IR,^1 H NMR,^31P NMR and mass spectroscopy.