Abstract:The use of low pressure technique for gas chromatograph results greater gas flow through column and detection.Moreover,the sensitivity of detection and the column efficiency are developed.At the same column temperature,low pr

Abstract:The valence bond structure,crystal structure and symmetry of C 60 ,the crystal structure of carbon atom cluster and the relation between Bucky Tube and Bucky Ball are discussed.

Abstract:通过对当代世界经济形势的剖析，从以快制胜占领市场、设计面向制造和组装、新材料及废车材料回收、电子技术、汽车安全性以及汽车工业全球化等几个方面，论述了世界汽车的发展动向。

Abstract:The heat transfer characteristics and the ability of anti corrosion of low temperature and preventing dust collection of heat pipe air preheater(HPAP)are analysed.The effective measures of controlling the low temperature corrosion and decreasing the dus

Abstract:A brief review on genetic algorithms is presented.The problems about traditional methods in optimization design of electrical machines and equipment have been pointed out.Writers belive that genetic algorithms will be a better method for optimization des

Abstract:Based on MCS 51 single chip processor(SCP),a new device which measures power harmonics on line is introduced.Its hardware structure is simple,and it provides high performance at a low price.The software is designed precisely and skillfully in accorda

Abstract:The fault-tolerant semiconductor menory is descussed. First we in troduce the fault -tolerant technique of memory ,then present the system design of a kind of fault-tolerant memory on-chip and the system reliability analysis.

Abstract:Using strain model for structural damage diagnosis is one of new research topics.Authers studied the principle and method of strain model measurement theoretically.From the test and analysis of concrete frames,it is proved that strain model is more sensit

Abstract:The calculation principles and the calculation steps of nonlinear seismic response analysis of tall building structures by using the modified Ritz vectors superposition method have been set up,the comparsion between the proposed method and the common dire

Abstract:A new method is used to calculate the natural vibration period of masonry building with frame structure in first and second floors on deformable foundation.A numerical example is given which indicates that the method presented in this paper is effective.

Abstract:CAPP plays a bridging function in CIMS information integrated,we can establish a practical CAPP system with broad coverage,with the help of rapid prototyping in the data base development enviroment for object oriented powerbuilder.

Abstract:The problems brought to multiagent cooperation in distributed open environments by the dynamic and unpredictable properties are analysed.The paper presents a general purpose multiagent cooperation model that solves these problems .The model specif

Abstract:Based on the examples of multimedia CAI in the external device lesson ,the relations between the class teaching and CAI system is discussed. Some rules and conceptions for design are given.

Abstract:The quantitative analysis of the factor productivity of Hunan's automobile industry is carried out by means of Cobb Douglas Function.Some phenomena of the factor combinations and their causes are also discussed.Based on the results obtained,some helpful

Abstract:The method of determination of corrosion parameters on the base of polarization curves measurement was studied by using the optimization method. Three of non linear fitting methods were selected for this topic.The numerical

Abstract:We offer some sufficient conditions for the asymptotic behavior and oscillation of a type of neutral delay difference equation with variable coefficients,which improve and extend some results obtained in the literature.

Abstract:We investigate the oscillation of solutions of delay difference equations with continous variables and variant coefficients.Some new criteria have been established.

Abstract:通过对红外搪瓷配方和组成的设计，获得了在２．５￣２５μｍ红外波段内具有稳定的高红外吸收率、法向全发射率为０．８６的搪瓷材料。用该红外搪瓷制成的搪瓷铸铁锅，其传热效率比不涂搪瓷的铸铁锅提高２０％，且抗冲击韧性和耐温急变性分别达到０．４５Ｊ和５００￣２０℃，是普通搪瓷标准的２倍，在红外搪瓷中形成的ＺｒＳｉＯ４和（Ｃｕ，Ｃｏ，Ｍｎ，Ｆｅ）３Ｏ４等微晶是使该搪瓷获得高红外辐射率、优良的抗冲击韧性和耐温急变