Ecological Water Requirement Estimates for Typical Areas in the Huaihe Basin

Aquatic ecosystems require ecological water allocation to prevent from being damaged by natural disasters and undue exploitation. This paper discusses and estimates the ecological water requirements （EWRs） of typical areas in the Huaihe Basin to determine rational allocations of water resources and pro- mote regional improvements of the ecological environment. The main river course, including Hongze Lake and Nansi Lake, was selected as the study subject. Calculational methods for the river and lake EWRs were based on the reasonableness of the results and data availability. The monthly guarantee rate method was used to calculate monthly, flood period, non-flood period, and annual EWRs for the main river course and the main tributaries at two different guarantee rates. The minimum water level method was used to calculate annual EWRs for Hongze Lake and the upper and lower Nansi Lake of 1.521×10^9 m^3, 0.637×10^9 m^3, and 0.306×10^9 m^3. The results were used to evaluate the rationality of the quantity of water resources allocated to ecological uses in the Huaihe Basin during 1998-2003. The result shows that the present water resource allocations in the Huaihe Basin cannot satisfy the basic ecological requirements for some years, especially years with less precipitation.     

术语的命名有损于汉语环境吗？

术语的命名应与汉语环境相适应乃国人之共识,原无可非议.但制定科技术语除应考虑其与汉语环境相适外,还应遵循科学性、系统性、单义性、国际性、简明性、习惯性(约定俗成)等多项原则,此外还应考虑到修辞、音节等各个方面,如果片面强调其中之一而不顾其他,必将局限于一隅而忽视全局,给科技术语工作带来不利.<术语命名须应对汉语环境>[1](以下简称<汉语环境>)一文中对防火墙、以太网等术语提出的异议恰好表明了该文中的众多论点是不够全面的.     

Application of rough graph in relationship mining

Based on the definition of class shortest path in weighted rough graph,class shortest path algorithm in weighted rough graph is presented,which extends classical shortest path algorithm.The application in relationship mining shows effectiveness of it.     

Primary Analysis of Development Approach to Chinese Satellite Mobile Communication

The paper describes the development of mobile communication first and then points out that it is necessary for China to develop satellite mobile communication after comparing the cellular mobile communication with the satellite mobile communication. After comparing the geostationary satellite system with the low earth orbit satellite mobile communication system, as well as the single beam with the multi-beams, both used in satellite mobile communication, we suggest that China, according to its economic status and level of satellite technology, should develop a geostationary multi-beams satellite for its domestic mobile communication.     

加强企业思想政治工作的思考

在我国企业改制和建立现代企业制度的不断深入下,笔者通过多年工作实践对思想政治工作中的问题进行思考。     

聚落演变中的社会心理研究

城市与乡村是聚落存在与发展的两种基本的模式.但是在乡村不断地消减,城市不断扩张的当下,城市化困境越发突出.城市人的困境并非只是经济问题、社会问题,更是自然问题与心理问题.因此,厘定聚落演变的社会心理特征,从人的主体性角度指导聚落发展的根本动力,为走出城市化困境提供哲学层面的指导.     

若干复杂性著作和emergence近期文献分析研究

主要讨论了几本复杂性著作和复杂性的《涌现》专业杂志1999-2005年各期文献表现出的研究趋势,基于文献,我们认为复杂性研究存在三个重要的趋势:(1)复杂性研究的形上形下两级化趋势明显;(2)复杂性研究的科学之维与人文之维扩展趋势明显,甚至出现了艺术学科和神学领域的复杂性问题研究;(3)复杂性研究隐喻与超越隐喻的方法论两级化趋势也很明显,希望超越隐喻的呼声渐高。     

对硝基偶氮苯胺的电化学研究

对硝基偶氮苯胺的电化学研究黎昱１）刘建平２）童叶翔２）梁兆熙１）刘冠昆２）（１）中山大学高分子研究所，广州５１０２７５；２）中山大学化学系）关键词对硝基偶氮苯胺，电化学分类号Ｏ６４６对硝基偶氮苯胺（ＤＯ３）是一种应用广泛的偶氮染料，具有非线性光学特...     

KINETICS AND MECHANISM RELATING ALKALINE HYDROLYSIS OF POLYESTER BLEND FIBER

Cation Dyeable Polyester(CDP)was made by copolymerizing dimethyl terephthalate(DMT),S-sodium sulfonate dimethyl isophthalate(SIPM) with a weight fraction of 4.5% and ethyleneglycol (EG).Blend of PET and CDP was spun into hollow fiber.The fiber was then treated withaqueous NaOH.In this paper,kinetics and mechanism of alkaline hydrolysis of PET,CDP andtheir blend PET/CDP fiber were studied by means of specific area measurement,scantling elec-tron microscopy and other chemical analyses.It was showed that the rate of alkaline hydrolysis isCDP>PET/CDP>PET.Because of blending effect,the alkaline hydrolysis of PET/CDP is dif-ferent from that of PET.CDP phase in the PET/CDP fiber is predominantly hydrolyzed,andhence some pieces of fiber(micro-fiber) fall off the fiber because of etching.