Abstract:This paper investigates the oscillatory and nonoscillatory behavior of second order neutral delay difference equations.The results obtained extend some known results given in the relative literature.
Abstract:An entropy in broad sense is suggested.The entropy equation is then deduced from a given model equation of advective diffusive problems.And it is displayed that the model equation has the non negative definite property of entropy production of dissipati
Abstract:According to the practical conditions in the research of automobile passive safety,a series of key problems which impair the reliability of research results and the progress of research work seriously are described,meanwhile,relevant measures to slove the
Abstract:探讨性地定义了广义熵的概念;对于给定的模型方程,建立了相应的熵方程,揭示了模型方程潜在固有的耗散熵产非负定性质;提出了以该非负定性为准则,对模型方程的一般化数据格式稳定性限制条件的分析方法.针对一些典型的数值格式导出了具体的限制性条件,归纳性地显示该方法的结果为稳定性的充分条件,为耗散与数值稳定性的内在联系提供了新的理解.
Wen Xianzhang , WangZhicheng , YuJianshe
Abstract:以b参数,讨论向日葵方程Hopf分枝存在的条件,并使用“规范型”方法,得到分枝周期解的渐近性表达式及其稳定性准则。
Abstract:We define the box dimension,study its properties,and obtain another expressions for Hausdorff dimension and Packing dimension.In the end,we calculate the fractal dimension of a kind of subsets.
Abstract:There is a large number of measurement data in physics experiment and measurement,which is from iso interval independent varibales.Because the simple arithmetic mean method and the usual subtracting one by one method are irrational in processing these
Abstract:The coordination status of the B 3+ ions in the PbO Bi 2O 3 B 2O 3 glasses was investigated by using the IR absorption and the Raman shift methods.The results show that,when the B 2O 3 content is lower than about 22.64 mol%,the B 3+ ions
Zhu Yuanbao , Yan Liushui , Cao Zhixiang , We Lingfei , Chen Zongzhang
Abstract:In this paper,the conductivity,pH,dissoived oxygen,density,evaporativity and IR,NMR,UV spectrum of magnetie water under various magnetized condition have been studied.It is found that pH,dissoived oxygen and evaporativity are increased,UV absorption peak
Abstract:An analytic method on micropore structure of activated carbon fibers by t plot was described and accurate nitrogen adsorption isotherm used as reference data of t plot was presented.The specific surface area of micropore wall,micropore volume an
Xia Jintong , Zheng Maoping , He Liping , Xiong Youyi , Zhou Shengmai , Chen Zongzhang
Abstract:A new,unsophisticated and safe methods of graphite fluoride preparationsolid phase method technology is presented in this paper,and the product is examined by IR and XRD,otherwise the factors on influence the preparation of graphite fluoride is discussed
Xu Dihong , Liu Zijian , Zong Zian
Abstract:When designing the deep pulling die of tube shaped parts with traditional method to determine many parameters and coefficicnts of the die,the cut and try method is used.This paper presents how to change the cut and try method to a computer application pr
Chen Geng , Zhou Jinming , Xiao Yanhong
Abstract:This paper presents a test system consisted of the tested synchronous generator and synchronous motor with the same type mounting in the same axis.The motor is not only the electric load but also the primary power machine of the generator,transferring ele
Abstract:A universal current mode integrator based CC(Current Conveyor)filter structure is presented.The filter architecture proposed is constructed using a canonical FLF(Follow the Leader Feedback)configuration with an input distribution CC network.They are c
Zhong Qingchang , Xie Jianying , Peng Chuwu
Abstract:This paper presents an External Model Controller(EMC) for process with time delay.The output error,between the external model and the actual system,is used to compensate the control signal directly through a filter.The dynamic characteristics,which is for
Abstract:对此类高大空间建筑的纵向隔断气流运动进行了数值仿真、分析了影响形成纵向隔期气流的各种因素,找到了形成纵向隔断气流各影响因素(参数)间相互关系,研究结果对指导该类建筑的气流污染控制、洁净及空调工程的模型度试验及工程设计有重要的指导意义。
Zhang Jingwen , Tang Haibing , Li Nianping , Zhao Juying
Abstract:According to the research on Coal Water Mixture (CWM) combustion.This paper analyzes the main characteristics of combustion process,amd presents a practical prediction model of energy saving and tests it by experiments.
Abstract:研究了滤池反冲洗水和原水混合一并处理时,反冲洗水的加入对水处理混凝沉淀的影响,对于中低浊度、中浊、高浊度原水,加入一定比例(5% ̄10%)的反冲洗水(浊度一般为1000 ̄1500NTU),即可回收利用反冲洗水,又可减少混凝剂的投加量。
Abstract:This paper presents a new theory and the models of its application on calculating general capacity in highway network planning,which is an extended application in highway network of the capacity of highway section and intersection in traffic engineering.T
Shang Yuanmin , Wu Yao , Wu Huimin
Abstract:This paper described the variations of ultrasonic pulse frequency spectrum when it transfer at the defective zone in concrete.In order to take into account frequency spectra variation,on the basis of the total energy of a spectra we get a distortion coeff
Abstract:This paper states the pile forming process and special advantages of the temped and enlarged pile without pile shoe,its appropriate conditions and the design calculating principle.Meanwhile the paper shows by practical example of engineering that the tem
Abstract:This paper discusses some relations between body real motion and its animation according to the speed and the accelerator.Some specific motions are simulated by 3DS software,and some important results are acquired.
Abstract:This paper describes in detail the significance and concept of ATM LAN Emulation as well as the network architecture and operating mechanism of LANE system model.The limitation of LANE and a new development of ATM LAN interconnection are also analysed.
Abstract:This paper discussed the basic principle of arbitrage pricing and basis of short term interest rate futures,compared the futures prices and FRAs (forward rate agreemeets) and analysed spread positions.