Abstract:通过对一维无限深势阱的量子运动严格的解析计算表明,经典极限下,量子力学中的物理量在等权波包下的期望值,趋于经典力学量的傅立叶级数的Fejér平均值,而不是傅立叶级数本身.而且,当等权波包中叠加的本征态的数目N等于量子数n的平方根时,等权波包的不确定性最小.
Abstract:研究了蛋白质与偶氮胂Ⅰ的显色反应.在pH3.2的Britton-Robinson缓冲溶液中,偶氮胂Ⅰ与蛋白质形成红色复合物,λmax为551 nm,ε为2.5×105 L@mo1-1@cm-1,蛋白质含量在13.2~231 mg/L范围内服从Beer定律.所提出的方法可直接用于血清、花生等生物样品中蛋白质的测定.
YANG Ping hua , ZOU Min fen , ZHANG Zheng qi
Abstract:研究了蛋白质与偶氮胂 的显色反应 .在 p H3 .2的 Britton-Robinson缓冲溶液中 ,偶氮胂 I与蛋白质形成红色复合物 ,λmax为 551 nm,ε为 2 .5× 1 0 5 L· mol- 1· cm- 1 ,蛋白质含量在 1 3 .2~ 2 3 1 mg/L范围内服从Beer定律 .所提出的方法可直接用于血清、花生等生物样品中蛋白质的测定 .
Abstract:Upper(lower) sublattices are used as a tool to establish structure theorems of generalized continuous lattices.They lay the foundation of representation of such lattices in terms of complete chains.
Abstract:Three mathematical models for seats distribution problem are presented,all of which are solved by the grid search algorithm,and are due to using appropriately the least squares idea in order to describe the fairness associated with the seats distribution
Abstract:The Self conjugate matrices and the strongly general self conjugate matrices are discussed.Some properties of these matrices are obtained.
Abstract:On the basis of Efficient Market Hypothesis and its general test model,introducing Hurst Exponent & R/S Analysis Model,the positive research of Chinese securities market is presented.
Abstract:The critical speed and dynamic stabilities for a rotor system of flexible shaft and elastic disk with viscous supported is discussed.Shaft and bearing may have damping and asymmetric/anisotropic stiffness.Using the energy method and the Lagrange equation
Abstract:A optimal model is developed to reduce the range of fluctuation stress in pressure vessel and cut down the time consumed in the start up and shutdown process,by setting the time interval of each pressure variation stage as optimal variable.The reasonable
WANG Yu zhi , LUO Ming hui , LI Qing hong , XIONG Jin fang , ZHU Shu ming
Abstract:研究了HCl溶液中KBrO3-KBr紫外分光光度法测定苯酚的条件.建立了测定痕量苯酚的新方法.结果表明,在0.6 mol/L HCl,4.6×10-5 mol/L KBrO3,5.1×10-4mol/L KBr,5.7×10-4mol/L KI溶液中测定苯酚,其线性范围为0~120 mg/L,表观摩尔吸光系数为4.58×104L@mo1-1@cm-1,Sandell灵敏度为0.001 9μg/cm2.本法用于废水中苯酚的测定,结果满意.
WANG Ling ling , ZHAO Li hua , HUANG Wei qing , HUANG Gui fang , ZHANG Jian yong
Abstract:利用X射线衍射方法研究了不同Na2H2PO2的质量浓度以及热处理温度条件下化学镀三元Ni-Fe-P和四元Ni-P-B镀层的结构,在温度为200-700℃范围内加热镀层产生结构变化,当热处理温度等于或低于400℃时,镀层的显微硬度随温度增加,这与从Ni-P-B镀层非晶基底中析出(Fe,Ni)固溶体,Ni3P相以及从Ni-P-B镀层(Fe,Ni)固溶体基底中析出Fe2B等相有关,热处理温度大于或等于500℃时,NiP,Fe3P,Fe2B等相析出,同时随温度增加颗粒逐渐粗化,引起镀层软化,在Ni-Fe-P镀层中加入KBH4,经300℃热处理引起镀层显微硬度增加,低于300℃热处理对镀层硬度影响不明显,该现象可由B与Ni-Fe固溶体基底形成了晶化相加以证实。
XIE Zhong , ZHAO Li hua , ZHAO Bai ru , WANG Zhu ying , HUANG Gui fang
Abstract:A systematic experimental study is presented on the capacitance abnormal jump of the PZT/YBCO heterostructures at YBCO superconductor critical temperature by using the HP4284A precise LCR meter.A simple equivalent physical parameters model is proposed to
Abstract:A formula of critical safety distance between two vehicles moving on the same trace of highway is built up by theoretical deduction,which is useful to the practice of vehicle's use.
HE Yi gang , CHEN Hong yun , XIE Hong
Abstract:提出了一种利用第三代电流传送器设计电流模式有源滤波器二阶节的方法,用该法能生成诸如低通、高通、带通、带阻、全通等各种标准电流模式二阶节,这些滤波器具有低元件参数灵敏度和高输出阻抗,级联可实现高阶电流模式滤波器。
LIU Hong li , TONG Tiao sheng , DUAN Zheng hua
Abstract:CSMA/CD protocol with dynamic allocation retransmission function is presented,and the performance and characteristic of this buffered protocol is analyzed with a two dimensional Markov chain.The simulation results show that the CSMA/CD/RR protocol is bet
XIE Hong , HE Yi gang , WU Jie
Abstract:Acorrding to the composition of the electronical control system of high cannon and the structure and futures of the electronical control system's circuit,this paper presents the design of the automatic fault diagnosis system based on neural networks,the h
YUAN Xing zhong , LI Fa hong , CHEN Xiao qing , ZENG Guang ming
Abstract:The catalytic reaction of several catalysts on pyrolysis production of polyethene and its wastes is studied.The influences of pyrolysis temperature on the production rate of liqiuld oil and its constituent was investigated.The influences of catalytic temp
Abstract:Combining the finite analytic numerical method and the compact scheme,a new modification method is presented for the pressure equation,a new method of computional fluild dynamic is developed.The three dimensional Navier Stokes equation is solved by this
Abstract:In order to analyze the influence of soil and pile stiffness on the foundation beam internal force,the layered load transfer method is suggested to calculate the pile stiffness and the horizontal secant method is used to adjust the foundation base reactio
Abstract:利用二次多项式位移函数导出了一个桁架结构的三节点截面桁段单元,提出了桁梁空间计算的三节点截面桁段有限元法,该方法适当地考虑了主桁弦杆节点刚性,桥面系横梁局部弯曲,斜桥门架及横联横梁局部弯曲的影响.算例表明,计算结果可靠、自由度较少,比较适用于大跨度桁梁桥的空间结构计算分析.
QIU Bo , WANG Rong hui , LIU Guang dong
Abstract:By use of the displacement function of quadratic polynomial,the three nodal section truss segment element is formulated,and the three nodal section truss segment finite element of spatial calculation for truss girder strcture is proposed.The effects of ma
DUAN Shao wei , SHEN Pu sheng , JIANG Jian guo
Abstract:Fuzzy random theory is used for calculating fuzzy random reliability of deep excavtion braced structures.A practical case is given which shows the application of fuzzy random reliability to selecting the deep excavation braced structures.
XIE Dong qing , XIONG Zhen guang , LI Chao
Abstract:A new key escrow scheme is proposed on the basis of digital certificate,in which only trust certificate authority (CA)is need for user and legal executive department,therefore the management is greatly simplified.In addition,our scheme has advantage that
YOU Zhi qiang , CAI Hong bo , ZHANG Da fang , XIE Bing
Abstract:A subsection insertion sorting algorithm with equal probability data segmentation is presented.The algorithm conbines traditional sorting algorithms with some knowledge and skill of modem statistics to sort data with general distribution.So the complexity
Abstract:Based upon the study of characters of Network Economy,an inexorable trend of rising abruptly of the enterprise collaboration depending on network technology is analysed.By discussing the profit and the stability of the collaboration for small and medium
Abstract:Based on the current situation of Chinese telecommunication industry and using the number of regular telephone users as an example,the application of qualitative and quantitative prediction technology to the decisionmaking of Chinese telecommunication ser
WEN Feng hua , MA Chao qun , CHAO Jian xiong
Abstract:In this paper we study some faults of VaR and exemplify that VaR is not able to distinguish portfolios which bear different levels of risk and that VaR is not subadditive in some cases.We put up a new risk measurement Expected Shortfall which is nearer