Abstract:The linear gradient loaded column of gas chromatography has been designed. The chromatographic performance of these columns has been evaluated with respect to column efficiency,resolution and analytical time. Both the case of a linear increase in k' and t

Abstract:Using EDX,SEM, XPS, etc. the surface ingredients, the valence and the morphology of activated-flyash-packed rub are studied. The results show that,on the transverse section of the rub,the content of St and Al is higher,while S content is lower,than that o

Abstract:The systemtical research on the effects of the inertia relaxaiton factor upon the convergent performance of the SIMPLE algorithm is given. By example, the optimum inertia relaxation factor which determines the convergent performance of the SIMPLE algorith

Abstract:By the example of treatment of the flue gas of the aluminium-alloy tail remelting, the means of design and calculation of the exhausted enclosure, and the priniciples and the equipments of elimination of dust,black smoke and harmful gas are descussed.

Abstract:A skinning method of constructing by Nurbs sectional curve is presented. The skinning surface method for constructing free-form surface in enginnering by serveral Nurbs cross-sectional curves is studied emphaticaly.This method is suitable for the free-for

Abstract:A finite element method is used for solving the two-dimensional Renolds Equation of a hydrodynamic journal bearing. The oil stiffness and damping coefficients of elliptical, three-lobe and four-lobe are calculated. A matrix method is used for solving the

Abstract:By mean of tests on drilling with CMFD, the influence of the drill diameter, feed and the speed on the hole oversize, circularity, perpendicularity and straightness have been obtained.

Abstract:Using the comprehensive diagnosis technique for the knowledge base and utilizing fuzzy mathematics in the knowledge representation and the inference tactic, a comprechensive diagnosis expert system is presented for realizing the fault diagnosis of the pow

Abstract:A simple current-mode universal biquadratic configuration with one input and three outputs is presented, which is possible to realize lowpass. highpass.bandpass. allpass and notch filtering characteristics. No strict copsponent matching condition is neede

Abstract:Measurement results of soil-foundation contact reaction and settlements of the cantilever box-Fundation with prestressed reinforced concrete are compared with results of theory analysis. The contact reactions, settlements and dip of the box foundation wit

Abstract:Compairing with the test of concrete beam containing high-fiber steel,the affecting factors on fiber bridge action are studied by the interface approach. Using the fracture mechanics the check method for fiber bridge action is proposed.

Abstract:A general approach for imformation system development that completely covers the system' S life cycle is proposed. The extra attention is brought to the beginning of project when the information system development policy and problom situation context shou

Abstract:The logarithm algorithm for circular interpolation is put forward, the error analysis is also given. The software is programmed with MCS--51 assambly laguage.

Abstract:The localization theorem of Weyl-Heisenberg frame expansion formula on Sobolev spaces is established. Thus a Daubechies theorem is generalized.

Abstract:By measuring the variation curves of the resistance with tensile strain in amorphous Ni72-x Si15B13+x(x=0, 2, 4, 6, 8) alloys, the effect of B content on the sensitive coefficients of resistance with strain K. of these specimens is investigated. Using the

Abstract:报道了瓦特型镍－碳化硅复合电沉积过程，研究了ＳｉＣ微粒的表面活性剂处理、粒子浓度、阴极电流密度、搅拌和ｐＨ值等因素对镀层硬度和耐磨性的影响．结果表明：在最佳的工艺条件下，可制备出性能优良的复合镀层（９％～１０％ＳｉＣ含量），其硬度是纯Ｎｉ的４～５倍，耐磨性是纯Ｎｉ的５～６倍．

Abstract:A line search technique for nonlinear equations which is a modification of the so called "derivative free line search"given by Griewank (1986) is proposed. By means of this technique, quasi-Newton method is well defined. Under suitable conditions,the glob

Abstract:The sufficient conditions for the global attractivity of the nonnegative equilibrium of generalized Nicholson' s blowfly model are obtained. The results extend some conclusions given in the relative literature.

Abstract:The surface kinetics was studied based on the simple diamond surface chemistry. It revealed effects of various factors on deposition processes and led to formula of deposition rate of diamond thin films. The mechanism and the rule of the diamond thin film

Abstract:A linear conductive rubber with carbon black fillers was prepared. The dependence of the resistance on the content of carbon black and the Linear Characteristic of the conductive rubber with carbon black fillers were studied in detail. The best content of

Abstract:A concrete discussion about the chemical equilibrium constant is completed. It shows that the value of hp has nothing to do with the intensity of pressure but has something to do with the selection of pressure unit. Thus some inaccurate or incorrect viewp

Abstract:The elasto-plastic and geometrical nonlinear anisotropic plates and shells are analysed using three dimensional degenerate shell element and layered model. The shear and membrance locking phenomenon can be effectively overcome using 9-node Heterosis eleme

Abstract:A section of box girder with a cable anchorage in the cable-stayed bridge is computed using the spatial finite element method. The diagrams of the stress components in the box girder are plotted. The dangerous regions of the stress components are analyzed

Abstract:以γ－Ａｌ２Ｏ３活性碳，刚玉砂和石墨粉为埋粉，在由液ＮＨ３分解产生的Ｎ２和Ｈ２气氛中，采用无压烧结方法制备了氧化铝／碳化钛复合材料，研究了埋粉成分，升温速度等烧结性能的影响，实验结果表明，无压烧结产品的显微结构和机械性能上与热压产品比较没有明显的差异。