Abstract:Some sufficient conditions are obtained for the continuability of solutions in the future for a generalized Liénard system.Some known results are generalized and improved.

Abstract:综合论述了影响涡流室式柴油机冷起动性的结构和运行方面的因素;对变起动孔倾角和孔径对起动性能的影响进行了试验研究,成功地解决了165 F柴油机的冷起动问题.

Abstract:根据OSI安全体系结构,应用各种安全机制,提出了一个基于防火墙的分布系统安全体系结构,并在此安全体系结构上,设计了一个远程端-端安全通信协议.协议采用分层机制,应用非对称公钥体制对远程通信进行验证和密钥分配,提高了网络的安全性,有利于网络的安全管理.

Abstract:A kind of impulsive delay difference equation is studied and the sufficient conditions are obtained for the oscillation or nonoscillation of the solutions,and the conclusion is suitable also for the difference equation without impulsion.

Abstract:A method to prepare one dimensional nanoscale composite based on coating of carbon nanotube with metal is proposed.It is found that the complete and satisfactory silver coating on carbon nanotube is achieved by electroless plating.It is also found that th

Abstract:Polymer light emitting diodes,is a kind of devices for charge transport and light emission.The research progress in this aspect is reviewed.

Abstract:The combined deformation due to torsion and tension of incompressible rigid viscoplastic circular shafts is analyzed.As a special case,how a shaft only subjected to torsion,or only subjected to tension are discussed respectively.

Abstract:The influences of the heat treatment temperature,the boric acid solution concentration and the soaked time in boric acid solution on the mechanical and electrical properties of PAN based carbon fiber(CF) have been studied.The CF samples were prepared by

Abstract:The preparation and electrochemical characteristics of poly(1 naphthylaimine) film incorporate with P 2Mo 18 anion was described.The effect of acid concentration and rang of scan potential on the behivor of the film electrode was studied.It was fou

Abstract:This paper presents a control method for generator outputing constant frequency and constant voltage in its stator side when prime mover's speed changes,and establizhes a vector control medel oriented by generator's stator voltage space vocters.And then t

Abstract:A design method of new variable structure robust controller based on the expected characteristic is introduced.The technique fuses the merits of state feedback control and variable structure control.A control system so designed has the full response total

Abstract:Pricing becomes the basic means of market regulation as the establishment of electricity market.In consideration of the status of Chinese power industry and the characteristics of the transitional period of power system,a dual goal decision model based o

Abstract:This paper discusses the influence factors on the construction and runmingof the cold starting of swirl chamber diesel engine.The influence on cold starting performance of swirl chamber diesel engine by changing the agradient and diameter of starting hole

Abstract:通过用钨渣合金铸铁生产磨机的衬板、齿板、锤头，渣浆泵叶轮、等耐磨件的生产试验表明，该材质比传统的高锰钢效果好，耐麻约提高１．５－２．０倍，成本低３０％，且工艺简单。

Abstract:Solution of pressure correction equation plays a key role in SIMPLE algorithm for Navier Stokes equations.But for the equation is not one of the basic governing equations,its boundary conditions(BCs) cannot be determined by the problem itself,which makes

Abstract:There are coupling phenomenon which are correlation of momentum,energy and mass transfer in field of flows,heat transfer,mass transfer and combustion.Based on higher order fluctuating correlation of turbulence and Reynolds averaged equations,this paper

Abstract:According to the characteristics of R/C frame structures,the hypothesis of rigid floor in plane is used for construcing 3 D non classical super element that is adapted to the mechanics analysis of frame structures.The results of numerical examples demon

Abstract:Nowadays projects suffer from high uncertainty,the traditional methods are out of date day by day.Comparing with the available articles,this paper presents a project netowrk analysis method based on fuzzy sets theory.A network example is worked out to il

Abstract:Applying all kinds of security mechanism,a security architecture for distributed system based on firewall has been proposed according to the OSI security architecture.A remote end to end security communication protocol has also been presented based on t

Abstract:A Gain Greedy Admission Control for Multicast with Multiple Streams is proposed and compared with Bandwidth Greedy Admission Control.The simulation shows that Gain Greedy Admission Control gains same with Bandwidth Greedy Admission Control when the nu

Abstract:The evaluation problem of engineering qualities has been studied based on the theory of fuzzy mathematies,and a practical evaluation model has been worked out.