索塔台座大体积混凝土斜面裂纹探讨

本文以威海市环海公路工程项目,靖海湾斜拉桥索塔台座的大体积钢筋混凝土浇注施工工序实践为实例,对斜表面的保护层收缩裂纹进行探索。     

用系统分析法研究江西省能源科技发展战略和措施

本文用层次分析法(AHP)研讨了江西省能源科技发展战略和措施,并根据模型的计算结果,提出了一些建议。     

Linear constraints and the efficiency of combined forecasts

Studies of combined forecasts have typically constrained the combining weights to sum to one and have not included a constant term in the combination. In a recent paper, Granger and Ramanathan (1984) have argued in favour of an unrestricted linear combination, including a constant term. This paper shows that for the purpose of prediction it may make sense to impose restrictions on the combining model because of potential increases in forecasting efficiency. Empirical results show that small gains in forecasting efficiency can be obtained by restricting the linear combination of GNP forecasts from four econometric models.     

一个修正的循环Arnoldi方法

本文给出一个修正的循环Arnoldi方法,并讨论了它的收敛性。     

拟线性反应扩散方程的数值解

处理了一类拟线性反应扩散程的数值解,得到了隐式差分格式的解收敛到连续问题的解的证明,并从减少计算时间的角度出发,给出了一个收敛的改型差分方程.     

洱海湖区人口发展的预测与分析

本文科学地预测了洱海湖区人口发展的趋势,在原始数据和人口迁移方面提出了一些新的处理方法,揭示了这一地区人口自然增长率与人均国民收入之间的内在联系。     

Disaster Management Systems——A Placeholder for Decision Support Sub-Systems

Aspects of techniques for understanding and developing a system which is useful in the context of Disaster Management are outlined in the paper. The emphasis is on techniques for the development of requirements and software-specifically here for the basic, underlying computing system whose application packages (amongst others: Decision Support Sub-Systems) shall support Disaster Prediction, Relief (Damage Assessment & Mitigation) and Recovery. Throughout the body of the paper we shall be making frequent references to Decision Support Sub-Systems. As acronym for the subject domain the author has chosen: DiMaCS: Disaster Manegement Computing Systems.     

关于单纯形算法的一点改进

本文就单纯形算法选取入基变量的准则进行改进,给出一种新的选取入基变量的准则。按该准则进行的枢轴运算,能使单纯形算法的迭代次数减到最少,尤其对大规划线性规划问题而言,该方法能节省相当可观的CPU计算时间。     

正线性泛函的自动连续性

本文给出了Frechet-代数上正线性泛函自动连续的充分条件,并且得到了P-可换Banach-代数上正线性泛函连续的一些结果。     

Application of the linear partial information model to forecasting the Swiss timber market

Most often, statistical analyses only provide partial information about the appropriateness of different models, structures and parameters which may underlie the dynamic process that has generated a time series. Linear partial information (LPI), in particular, consists of linear restrictions such as LPI: p_a> p_b, p_a> p_c where p_a denotes the probability that structure a holds. Fuzzy information of this type can be put to use for decision-making by LPI analysis. In this paper, LPI analysis is applied to answer the question of whether subsidizing price, given an abnormal disturbance on the timber market, would contribute to continuous forest management, a stated goal of Swiss environmental policy.