关于时滞Volteraa型离散系统的稳定性

讨论Volterra型离散系统的稳定性.对于带有无限时滞的Volterra型离散系统,建立了某些有关稳定性的判定准则.     

概率树在电子商务交易诚信博弈分析中的应用

随着电子商务在我国的蓬勃发展,诚信问题变得越来越重要。立法可以解决安全问题,但电子商务的信用问题却依然存在。如何更好的让消费者了解网络购物存在的威胁,让消费者在购物过程中理智的选择商家,以及如何让双方都能在购物中受益。我们运用博弈和概率树建立模型来解答这些问题。     

改进的哈奇扬算法求解线性不等式组问题

本文研究了求解线性不等式组问题的哈奇扬算法, 发现算法中的不足, 并对其进行了改进; 运用改进后的算法求出了不等式组的解。     

Operation Performance of Central Solar Heating System with Seasonal Storage Water Tank in Harbin

This paper presented a preliminary research on the central solar heating system with seasonal stor-age(CSHSSS)used in cold climate in China.A mathematical model of the solar energy seasonal storage water tank used in the central solar heating system was firstly developed based on energy conservation.This was fol-lowed by the simulation of the CSHSSS used in a two-floor villa in Harbin,and analysis of the impacts on storage water temperature of tank volume,solar collector area,tank burial depth,insulation thickness around the tank,etc.The results show there is a relatively economical tank volume to optimize the system efficiency,which de-creases with increasing tank volume at the constant collector area,and increases with increasing collector area at the constant tank volume.Furthermore,the insulation thickness has obvious effect on avoiding heat loss,while the tank burial depth doesn't.In addition-the relationship between the solar collector efficiency and storage wa-ter temperature is also obtained,it decreases quickly with increasing storing water temperature,and then in-creases slowly after starting space heating system.These may be helpful for relevant design and optimization in cold climates in China and all over the world.     

Experimental study on load bearing behavior of large scaled caps with pile groups

The objective of this investigation was to study the behavior of deep pile caps and the ultimate load-carrying capacity. Four 1/10 scaled models of nine-pile caps were cast and tested on vertical loads to failure. The destruction shapes of pile caps,the correlation between load and displacement,and the internal stresses were analyzed systematically. The results demonstrated that the failures of all the four models are resulted from punching shear; the internal flow of the forces in nine-pile caps can be approximated by ＂strut-and-tie＂ model. Furthermore,the failure loads of these specimens were predicted by some of the present design methods and the calculated results were compared with the experimental loads. The comparative results also indicated that the ＂strut-and-tie＂ model is a more reasonable design method for deep pile caps design.     

一个具有任意阶非线性项演化方程的显式行波解

使用Mathematics 4.0软件、广义幂-指函数法研究了具有任意阶非线性项演化方程,得到了方程的扭状行波解和钟状行波解,这种方法也适合研究其它的非线性发展方程.     

扩展线性模型在家庭保险消费结构中的应用

本文以传统理论为基础,将扩展线性支出系统模型应用到家庭保险消费结构的分析中,通过实例,对家庭保险消费结构的现状进行分析讨论,对整体家庭保险消费市场进行预测,从而体现扩展线性支出系统模型的应用价值。     

自由么半群上的广义前缀关系与极大无关语言

研究了与L-前缀关系无关的语言,把码的完全化构造方法推广为一般L-无关语言的完全化构造方法,并反过来用这种一般构造方法审视码的完全化.由于在码的完全化过程中,所涉及的关系与完全化之后的结果相关,从而必须引入各种技巧,运用L-无关语言完全化的一般构造方法可以阐明这种技巧的切入点,从而对码的各种完全化方法有一个较清晰的认识.     

浅谈海南大学研究生学位论文数据库的建立

简述了海南大学研究生学住论文数据库的建立过程,介绍了回溯建库的具体方法,提出数据库建设中需要注意的一些问题.     

基于51系列单片机的车用数显报警系统

详细介绍了采用51系列单片机为主控芯片,红外线检测车轮运行情况,LED数码管显示车速,1602LCD显示总路程,通过密码来实现车辆启动的一种针对各种交通工具的数显报警系统设计,旨在提高交通工具停放的安全性.