Abstract:The effect of the bridged ligand on electronic properties in mixed-valence complexes is investigated. Based on analyzing the structure of bridged ligand, a six-mode model which includes the Interaction between electron-lattice vibration is presented. Afte

Abstract:The mean field approximation method is used to derive the equation which defines a phase diagram of the chemisorbed layer on a metal surface. The adsorbate coverage and the temperature dependence of the displaeement probability for atoms on the metal surf

Abstract:The interference of light can not be explained by the viewpoint that the light beam is interpreted as a photon current. Nor can the inter ference of electrons be explained by the viewpoint that the electron beam is interpreted as an electronic current.Sin

Abstract:The subharmonics of order n may appear in a vibrating system with a nonlinear restoring force proportional to nth power of its displacement. But this phenomenon is found only in some special systems, for instance, in the Duffing equation, and the general

Abstract:A set of approximate linearized yield-functions is presented for metal materials. It is a set of polygons with twelve edges which locates between the Tresca's hexagon and the twin shear-stress-hexagon. Using this yield-function in the limit analysis of co

Abstract:In this Paper, the general solutions are obtained for the bending problem of beams with nonhomogeneity and variable cross secton including the effect of transverse shear deformation under the arbitrary loads and ordinary boundaries by using the step reduc

Abstract:In this paper, the principles of building model by using time series analysis is used to analyse the system of the microcomputer-based dynamic track scale. In this case, it is possible to study the parts individually which comprise the whole weighing syst

Abstract:Petri nets, especially the extended Petri nets, have a great capacity of modeling communication protocols and can support the verification techniques very efficiently. After a discussion of various properties of the protocols to be verified, this paper pr

Abstract:This paper discusses the perfomance of the integrated communi cation on an Ethernet-like local area network supported by a priority protocol. Based on the protocol model, the voice and data load, voice quality and cother performance parameters are analyse

Abstract:This paper deals with the ladder-netork consisting of LC elements. The realizability conditions are proposed for a singly loaded two port LC ladder-network. It is proved that the zero shifting is completely effective in the development of the LC ladder-ne

Abstract:This paper discusses the existence and uniqueness of the polygon tostar transformation. The formulas are presented for calculating the parameters of the equivalent star-connected circuit.

Abstract:In this Paper, PVC membrane Selective clectrodes are prepared for theophylline which are based on its ion-pair complexes with hexadecylt- rioctylammonium iodide (HTOA) , hexadecyltributyl-ammonium iodide (HTBA), hexadeeyltriophenylphosphonium iodide(HTPP), triphenyloctylphosphonium leoide(TPOP) and tri(p-tolyl) butylphosphonium iodide(TPTBP).The effects of the nature of associate counterions, the plastieizers and their concentrations in the membrane phase have been studied. The electrode based on theophylline-HTOA membrane has a sub-Nernstian response range from 2.0×10~2—6.3×10~(-5)mol/L,with an average slope of 48.0mV/pC. The limit of detection is 8.7×10~(-6)mol/L. The electrode responses were not affected by pH in the range 10-12. The potentiometric selectivity coefficients of various common inorganic and organic ions including those which are similar to theophylline in structure were determined. The Na_2CO_3-Na_2B_4O_7 buffer of pH 11 is selected as the background solution for potentiometric measurements. The electrode was used for determining the theophylline in pharmaceutical preparations with satisfactory results.

Abstract:本文介绍以PC-05为催化剂的催化合成氯化石蜡-70的新方法.着重讨论催化氯化反应机理,催化反应速度和各因素对氯化过程的影响规律,并探讨催化法的优化条件.反应条件:氯化温度50～60℃,反应时间70～90分钟,氯气流速18～20〔克/公斤·分〕,催化剂浓度0.03～0.05%(重量).研究工作表明,催化氯化法具有反应速度快,生产周期短,产品质量好和工艺先进等优点.

Abstract:The feature selection is very important for the pattern recognition as wll as for the optimal combination of spectal channels or chromatographic columns. Based on the multiple correlation coefficients, a new method for feature selection is developed in th

Abstract:本文研究了cd(11)-3.5一二溴-PADAP-SDS-OP.显色反应条件.在pH8.60的硼砂-硼酸-氯化钠缓冲溶液中,橙红色配合物的最大吸收在575nm处,表观摩尔吸光系数为1.44×10~5.镉量在0～16ug/25ml范围内符合比尔定律,用于地面水中痕量镉的测定,结果满意.

Abstract:本文证明:对于任意连续的晶硅(α-S1)隙态密度分布g(E),非晶硅肖特基势垒(M/α-Si)的剖面是V(x)=A(x)(V_(bi)-u)exp(-Lx)+uA(x)=(exp(-2L(x_n-x))+1)/(exp(-2Lx_n)+1)这里u=r/L~2, r=en_e/kk_0, L~2=α~2g(Ei)/kk_0,x_n是势垒宽度.n_0是导带过剩电子密度,k和k_0分别是α-Si的介电常数和真空电容率.如果隙态过剩电子密度N_t>>n_e,则有V(x)=V_(bi)·exp(-Lx)这里V_(bi)是M/a-Si的内建势,而N_t=g(Ei)(E_(fn)-E(fi), N_1+n_e=N?这里E(fn)和E(fi)分别是n型α-Si和本征α-Si的费米能级,N?是电离施主浓度,g(E_i)是E=E_i时g(E)的值,并且在本文中称它为"α-Si有效隙态密度”.

Abstract:Based on the comparison of the relay and the electronic controllers with the microcomputer controller used for shift-hood filters, the opeating principle and the dharacteristics of the shift-hood filters with a microcomputer are analysed. The interface ci