模上线性方程组的相容性

对交换环上线性方程组的相容性的研究,获得的主要结果有:若方程组AX=b在系数环中有解,则矩阵A的各阶行列式理想与增广阵(A|b)的同阶行列式理想相等。可惜,对一般交换环,此条件并不充分。但文献[1]证明,对所谓prüfen环,上述条件亦是充分的。本文对模上线性方程组作了类似的推广,并修正了文献[1]的主要结论证明的疏漏。     

System Dynamics Model of Financial and Monetary Mechanism

System dynamics model of financial and monetary mechanism are established on thebasic of qualitative research in financial and monetary theory,by applying system dynamics to finan-cial and monetary law of movement,development and change in economic system and simulating thislaw.With it,we can analyse the interrelations between finance and banking;analyse the quantityof money demanded by the economic system,determine the most desirable quantity of money de-     

Orlicz教授和他创造性的工作

本文介绍了著名数学家和教育家Oricz教授和他创造性的工作,以及他对中国数学研究工作的重大影响     

发汗控制方程差分解法的并行化

本文给出固定边界发汗控制方程显式与隐式差分解法的并行化方法.数值试验表明隐式差分格式的数值稳定性的条件比显式差分格式的条件要宽松得多,这与理论分析的结果是一致的;数值试验还表明显式方法的加速比及效率均高于隐式方法,但隐式方法的时间步长可以放大,从整体上更节省CPU时间.本文给出固定边界发汗控制方程显式与隐式差分解法的并行化方法.数值试验表明隐式差分格式的数值稳定性的条件比显式差分格式的条件要宽松得多,这与理论分析的结果是一致的;数值试验还表明显式方法的加速比及效率均高于隐式方法,但隐式方法的时间步长可以放大,从整体上更节省CPU时间.     

中国城市生活废弃物处理方法的优序决策

在分析影响城市生活废弃物处理方法的自然、经济及环境因素的基础上, 利用层次分析法(AHP)构造城市生活废弃物处理方法的决策模型。卫生填埋法和高温堆肥法联用, 是适合我国国情的最佳处理方法。     

Study on the Medical Image Distributed Dynamic Processing Method

To meet the challenge of implementing rapidly advanced, time-consuming medical image processing algorithms, it is necessary to develop a medical image processing technology to process a 2D or 3D medical image dynamically on the web. But in a premier system, only static image processing can be provided with the limitation of web technology. The development of Java and CORBA (common object request broker architecture) overcomes the shortcoming of the web static application and makes the dynamic processing of medical images on the web available. To develop an open solution of distributed computing, we integrate the Java, and web with the CORBA and present a web-based medical image dynamic processing methed, which adopts Java technology as the language to program application and components of the web and utilies the CORBA architecture to cope with heterogeneous property of a complex distributed system. The method also provides a platform-independent, transparent processing architecture to implement the adva     

An Evolutionary Real-Time 3D Route Planner for Aircraft

Abstract: A novel evolutionary route planner for aircraft is proposed in this paper. In the new planner, individual candi-dates are evaluated with respect to the workspace, thus the computation of the configuration space is not required. By usingproblem-specific chromosome structure and genetic operators, the routes are generated in real time, with different missionconstraints such as minimum route leg length and flying altitude, maximum turning angle, maximum climbing/diving an-gle and route distance constraint taken into account.     

Performance Analysis of the Dynamic CSMA/CD Protocol in a Wireless Channel

In wireless networks, packet access is a popular mode, and the key problem is how to improve throughput and access delay performance, especially the throughput for wireless channels. These results will be a reference for not only a wireless channel but also a common MAC protocol.     

高教运行机制的微观结构体系——再论社会主义市场经济条件下高教运行机制

构建社会主义市场经济体制下高教运行机制应由3个层次65种机制组成其微观结构体系。第一层次由目标、决策、动力、调控反馈、投入等5个机制组成。这5个机制分别派生出3个机制组成第二层次。第二层次又派生出45个机制构成第三层次。