用光化学方法去除废水中的有害有机物和金属

研究了一些有机物，如丙酮，酚，染料和茶皂角甙的光催化降解，结果表明：酚的降解与文献报导的情况基本相同，在催化剂TiO2的作用下，紫外光能有效降解纺织厂的印染废水中的染料；金属化合物对光降解反应具有很大影响；还首次试验了用光催化原理消除茶皂甙中有毒溶血素的方法。     

再生核空间中时间分数阶扩散方程的数值解法

提出一种简单的求解时间分数阶扩散方程的新方法,数值结果表明该方法是有效的.     

THE TRANSITION PROBABILITY MATRIX OF A MARKOV CHAIN MODEL IN AN ATM NETWORK

In this paper we consider a Markov chain model in an ATM network, which has been studied by Dag and Stavrakakis. On the basis of the iterative formulas obtained by Dag and Stavrakakis, we obtain the explicit analytical expression of the transition probability matrix. It is very simple to calculate the transition probabilities of the Markov chain by these expressions. In addition, we obtain some results about the structure of the transition probability matrix, which are helpful in numerical calculation and theoretical analysis.     

等待空间有限的第三类可修排队系统

本文研究了等待空间有限的第三类可修排队系统．假定服务台的寿命在忙期和闲期服从不同的指数分布，修理时间服从不同的一般分布．利用向量马氏过程的方法，不仅求出了系统的队长和忙期分布等排队论指标，而且还求出了服务台的可靠度和可用度等可靠性指标．     

Study on the Reliability Evaluation of Qualitative Indices in Multi-Objective Decision

Qualitative indices in multi-objective decision can usually be evaluated and measured by mathematical methods or models, but the obtained results are sometimes inaccurate because of fuzziness of indices. To improve the accuracy and reliability of the evaluation results, set-value statistic principle is applied, and accordingly four evaluation methods are obtained. Meanwhile, these methods are compared briefly.     

状态空间模型、协调积分与股票价格预测

应用向量值状态空间模型的两步建模方法分析了深圳五种股票价格的动态行为,样本选在１９９６年下半年这一股市波动较为剧烈的时期．研究结果表明：在趋势模型中五种股票的价格序列构成了带有一个共同趋势（根的估计值为０．９９）的协调积分过程．此外在周期模型中还发现了一个较弱的趋势和两个复数根．最后通过有关统计量和２０天的样本外预测以及Ｈｅｎｒｉｋｓｓｏｎ与Ｍｅｒｔｏｎ提出的非参数检验方法验正了分析和预测结果的有效性.     

The Ordering and Replacement Policy for the System with Two Types of Failures

In this paper, the optimal maintenance policy is investigated for a system with stochastic lead time and two types of failures. The system has two types of failures, one type is repairable, when the repairable failure occurs, the system will be repaired by repairman, and the system after repair is not "as good as new". The other type of failure is unrepairable, and when the unrepairable failure occurs the system must be replaced by a new and identical one. The spare system for replacement is available only by order, and the lead time for delivering the spare system is stochastic. The successive survival times of the system form a stochastically decreasing geometric process, the consecutive repair times after failures of the system form a renewal process. By using the renewal process theory and geometric process theory, the explicit expression of the long-run average cost per unit time under ordering policy(N-1) is derived, and the corresponding optimal can be found analytically. Finally,the numerical analyses are given.     

解决线性规划系统识别问题的新方法

对一类特殊的逆线性规划问题———线性规划系统识别———进行研究,即试图通过给定的输入-输出数据来估计线性规划模型的技术系数矩阵以及目标函数系数.构建了估计技术系数矩阵的行估计模型,并对该模型进行改进得到更好的估计模型;基于Troutt提出的最大决策效率方法,构建了估计标准化目标函数系数的模型;通过两个数值算例说明该估计方法具有良好的表面有效性,且符合提出的后续验证准则.     

马铃薯淀粉渣制取草酸的研究

研究了以马铃薯淀粉渣为原料,采用水解一氧化的方法制取草酸的最佳反应条件：当用硫酸浸泡４ｈ,硝酸／淀粉渣质量比为２．３７—２．４５,氧化反应温度６５－７５℃,反应时间５—６ｈ,草酸二水合物收率＞６５％。该法工艺简单,成本低廉,有较高的经济和社会效益。     

多连通域粘性流动的边界元分析

本文采用计算流体的边界元方法,对多连通域内的粘性流动进行了研究,并与其他方法［１］进行了比较,结果表明本文方法是有效的。