关于呼延水厂绿化的思考

结合绿化建设工作实际,提出应当通过大树移植,大面积种植草坪,爬山虎、合欢、火炬等苗木的选择,苗木名称细化,经济林木的选取等措施对呼延水厂园林进行绿化。     

利用增益率构建混合型选择性不完整数据分类器

鉴于已有的绝大多数选择性分类算法主要用于完整数据,而现实中的数据通常是不完整的并且包含许多冗余属性或无关属性,本文在已有工作基础上利用信息增益率构建了一种用于不完整数据的混合型的选择性贝叶斯分类器:GBSD.在12个标准的不完整数据集上的实验结果表明,GBSD不仅能大幅度减少属性数目,而且比已有工作更能有效改善分类准确率和效率.     

A Procedure for Estimating the Number of Clusters in Logistic Regression Clustering

This paper studies the problem of estimating the number of clusters in the context of logistic regression clustering. The classification likelihood approach is employed to tackle this problem. A model-selection based criterion for selecting the number of logistic curves is proposed and its asymptotic property is also considered. The small sample performance of the proposed criterion is studied by Monto Carlo simulation. In addition, a real data example is presented. The authors would like to thank the editor, Prof. Willem J. Heiser, and the anonymous referees for the valuable comments and suggestions, which have led to the improvement of this paper.     

职业教育的社会化趋势和职技高师的战略选择

本文从21世纪我国师范教育和技术教育发展趋势的基本判断和分析评价着手，在阐释职业技术教育社会化趋势的基本内涵和表现特征的基础上，提出“以本科为主，注重发展产业型专业，形成多学科，多层次，多形式的办学格局”总体战略思路及措施。     

鹰瑞高速公路环保选线研究

通过对鹰瑞高速公路从环境要素进行的比选，并从环保角度提出路线推荐方案，使鹰瑞高速公路建设对环境的影响降到最低程度。     

曝气装置选用多目标专家系统

介绍一个曝气装置选用多目标专家系统，该系统的数据库用Access构造，储存有国内外172种曝气器的各项参数，以及若干IF－THEN型规则，推理机为正向推理与反向推理相结合方式，使用了多目标规划方法，用户通过本专家系统可以迅速选择到兼顾购买费用，使用费用，占地面积和处理效率等目标的暴气器，实例证明，本专家系统是有效的。     

Forecasting the Yield Curve in a Data‐Rich Environment Using the Factor‐Augmented Nelson–Siegel Model

This paper compares various ways of extracting macroeconomic information from a data‐rich environment for forecasting the yield curve using the Nelson–Siegel model. Five issues in extracting factors from a large panel of macro variables are addressed; namely, selection of a subset of the available information, incorporation of the forecast objective in constructing factors, specification of a multivariate forecast objective, data grouping before constructing factors, and selection of the number of factors in a data‐driven way. Our empirical results show that each of these features helps to improve forecast accuracy, especially for the shortest and longest maturities. Factor‐augmented methods perform well in relatively volatile periods, including the crisis period in 2008–9, when simpler models do not suffice. The macroeconomic information is exploited best by partial least squares methods, with principal component methods ranking second best. Reductions of mean squared prediction errors of 20–30% are attained, compared to the Nelson–Siegel model without macro factors. Copyright © 2011 John Wiley & Sons, Ltd.     

水泥稳定碎石施工中应注意的问题

介绍了水泥稳定碎石施工中应注意的几个问题,包括拌和场地的选择、施工设备的选配、材料及材料级配范围的选择、拌和时含水量的控制、碾压段落长度及碾压时间的掌握等。     

硫代双烯型螯合物溶剂效应的定量研究

用分子力学方法研究了硫代双烯型过渡金属螯合物溶剂效应的分子模型及定量性能关系。得到了该类结构染料最大吸收波长与其在溶液中构象能的半定量关系，为快速预测该类结构染料最大吸收波长提供了一个新的方法。     

可能性构造空间理论中选择模型的研究

在创造性思维过程中的可能性构造空间理论（PCST）和选择机理分析的基础上，对人类在创造性思维中选择的各个阶段作了深入详细的分析，提出了PCST中的TAKE，TEST和JUDGE等选择算子集的基本概念，并给出了主要算子的计算模型．