一种新型直流混合型HTSCFCL的研究

在研究混合型高温超导限流器和失超桥式整流型高温超导限流器原理的基础上,提出了一种新型单相混合型高温超导限流器,利用MATLAB进行仿真研究,结果表明该限流器设计参数准确,限流效果明显.新型直流混合型HTSCFCL的研究对限制短路电流和提高系统稳定运行具有十分重要的意义.     

Protein analysis based on molecular beacon probes and biofunctionalized nanoparticles

With the completion of the human genome-sequencing project, there has been a resulting change in the focus of studies from genomics to proteomics. By utilizing the inherent advantages of molecular beacon probes and biofunctionalized nanoparticles, a series of novel principles, methods and techniques have been exploited for bioanalytical and biomedical studies. This review mainly discusses the applications of molecular beacon probes and biofunctionalized nanoparticles-based technologies for realtime, in-situ...     

A Novel Biomolecular Immobilization Matrix Based on Nanoporous ZnO／Chitosan Composite Film for Amperometric Hydrogen Peroxide Biosensor

The performance of an enzyme electrode often depends on the method of enzyme immobilization when fabricating biosensors1. Therefore, the technique used to immobilize the enzyme is one of the key factors in developing a reliable biosensor. Organic-inorganic composite (or hybrid) materials have emerged in recent years. It combines the physicochemical attributes of components and improves their features. Organic components benefit the formation of defect-free inorganic membranes and make it less …     

Structural Characterization of a Polyaluminosilazane Precursor Prepared by Polymerizing Hexamethylcyclotrisilazane with Aluminum Acetylacetonate

A new polyaluminosilazane precursor was prepared by polymerizing hexamethylcydotrisilazane (HMCTS) with aluminum acetylacetonate and the structure of the precursor was characterized by FF-IR and XPS analysis. Result shows that aluminum was incorporated mainly in form of Al--N bond. Oxygen was also detected and found that it was mainly bonded to silicon.     

火焰原子吸收法连续测定氧化锑中铅、铜、铁含量

确立了火焰原子吸收测定氧化锑中铅、铜、铁含量的方法,探讨了样品的前处理、酸度、及共存元素的干扰情况,确定了各元素测定的最佳条件,回收率在95.4％-112.1％之间,精密度RSD%不大于5.9％,该方法能满足氧化锑中铅、铜、铁元素的测定。     

由主子阵和特殊次序缺损特征对构造Jacobi矩阵

In this paper,an inverse eigenvalue problem of constructing a Jacobian matrix from its prescribed specially ordered defective eigenpairs and a principal subma-trix is considered.The necessary and sufficient conditions for the existence and uniqueness of the solution are derived.Two numerical algorithms and two numer-ical examples are given.     

Weighted composition operators between μ-Bloch spaces on the unit ball

In this paper,necessary and sufficient conditions are given for the weighted composition operator T_(ψ,ψ) to be bounded or compact from the space β_μto β_ν(or β_(μ,0) to β_(ν,0) ) on the unit ball of C~n.At the same time,a series of corollaries are also obtained.     

Bernfeld-Haddock猜想的推广形式及其证明

本文研究一类时滞微分方程解的收敛性,这类方程是Bernfeld和Haddock所提出的关于一个非线性时滞微分方程的每个解收敛于常数的一个猜想中的方程的推广形式,并具有重要的实际应用背景．首先给出例子说明几篇现有文献关于此类方程及其它的几种推广形式的解的收敛性证明中存在的错误．然后对这类方程解的收敛性在更弱的条件下给出了一个新的论证,修正并改进了已有的相应结论,也肯定了Bernfeld和Haddock猜想中结论的正确性．最后,由丁同仁教授撰写了一个附录,修正了在原有文献中对Bernfeld和Haddock猜想的证明中所出现的错误．     

SUPERCONVERGENCE FOR L~2-PROJECTION IN FINITE ELEMENTS

Consider L~2-projection u_h of u to n-degree finite element space on one-dimensional uniform grids. Two different classes of the orthogonal expansion in an element for constructing a superclose to function u_h are proposed and then superconvergence for both u_h and Du_h are proved. When n is odd and no boundary conditions are prescribed, then u_h is of superconvergence at n+1 order Gauss points G_(n+1) in each element. When n is even and function values on the boundary are prescribed, then u_h is of superconvergence at n+1 order points Z_(n+1) in each element. If the other boundary conditions are given, then the conclusions are valid in all elements that its distance from the boundary≥ch|lnh|. The above conclusions are also valid. for n-dergree rectangular element Q_1 (n).     

ON GUNDERSEN''''S QUESTION FOR THE UNICITY OF MEROMORPHIC FUNCTIONS

The uniqueness of meromorphic functions that share four values are investigated, some results are obtained to show that if two nonconstant entire functions share three finite values IM, then the functions necessarily share all three values CM.