Ito 5阶和7阶mKdV方程新的周期解

§ 1　IntroductionIn recent years,a research of direct seeking for exactly solutions of nonlinear waveequations (NL WEs) has attracted much attention because of the availability of symboliccom- putation.Many methods,such as the homogeneous balance method[1 ] ,extended tanh-function method[2 ] ,Jocobi elliptic function expansion m ethod[3] ,are developed for thepurpose.In [4 ]the cn- function method,dn- function method and cs- function method wereproposed and applied to some NL WEs.It is sh…     

THE APPROXIMATION PROBLEM ON THE CLOSED CONVEX CONE AND ITS NUMERICAL SOLUTION

In this paper, we study the approximation problem on the closed convexcone, and prove that there exists a unique solution of the approximation problem, thengive the algorithm to compute the unique solution.     

基于氰化物对辣根过氧化物酶的抑制作用测定氰化物的研究

基于氰化物对辣根过氧化物酶(HRP)的抑制作用,将辣根过氧化物酶电极用于水中的微量氰化物的测定。酶电极制作中,先在金电极表面自组装一层半胱胺单层膜,再用戊二醛交联HRP。采用这种酶固定化方法,电极在6.0×10-5～4×10-3mol/LH2O2的浓度范围呈线性关系。探讨了工作电位、介体浓度、pH值、底物浓度等实验条件对酶电极性能及抑制过程中响应电流的影响,考察了电极的重现性、干扰及使用寿命。电极检测氰化物的线性范围为0.3～20μg/mL,检出限为100ng/mL,将电极用于水中CN-回收率的测定,结果良好。     

EXTREMAL SOLUTIONS OF TERMINAL VALUE PROBLEMS FOR NONLINEAR IMPULSIVE INTEGRO-DIFFERENTIAL EQUATIONS IN BANACH SPACES

§１　ＩｎｔｒｏｄｕｃｔｉｏｎａｎｄＰｒｅｌｉｍｉｎａｒｉｅｓＡｓｅａｒｌｙａｓｉｎ１９８１,ＡｆｔａｂｉｚａｄｅｈａｎｄＬａｋｓｈｍｉｋａｎｔｈａｍ［１］ｂｅｇａｎｔｏｉｎｖｅｓｔｉｇａｔｅｔｅｒｍｉｎａｌｖａｌｕｅｐｒｏｂｌｅｍｓ（ＴＶＰｓ,ｉｎｓｈｏｒｔ）ｆｏｒｔｈｅｆｉｒｓｔｏｒｄｅｒｏｒｄｉｎａｒｙｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓ．Ｈｏｗｅｖ－ｅｒ,ｔｈｅｒｅｓｅａｒｃｈｉｎＴＶＰｓｆｏｒｉｍｐｕｌｓｉｖｅｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓｈａｓｍａｄｅｌｉｔｔｌｅｐ…     

聚合物驱蚊剂的慢释放研究

本文研究了丙烯酸酯共聚物载体对驱蚊剂N,N-二乙基间甲苯酰胺(DETA)慢释放行为的控制,探讨了单体配比、共聚物分子量以及DETA含量对释放速率的影响。结果表明。增加亲水性单体丙烯酸(AA),可提高DETA的释放速率;降低共聚物数均分子量,会减少DETA的释放量;剂型中DETA含量与释放量存在线性正比关系,但DETA的含量增加并不导致释放有效时间的线性增加。本文还就共聚物膜的透湿性和碱溶性作了研究,亲水性单体AA的增加同样导致透湿性和碱溶性的增加。制备的聚合物驱蚊剂经现场应用试验,表明具有良好的长效驱蚊特性。     

Exact Fixed-node Quantum Monte Carlo： Self-optimizing Procedure

In this paper, a novel exact fixed-node quantum Monte Carlo (EFNQMC) algorithm was proposed, which is a self-optimizing and self-improving procedure. In contrast to the previous EFN-QMC method, the importance function of this method is optimized synchronistically in the diffusion procedure, but not be-fore beginning the EFNQMC computation. In order to optimize the importance function, the improved steepest descent tech-nique is used, in which the step size is automatically adjustable.The procedure is quasi-Newton type and converges super linear-ly. The present method also uses a novel trial function, which has correct electron-electron and electron-nucleus cusp condi-tious. The novel EFNQMC algorithm and the novel trial func-tion are employed to calculate the energies of 1 ^1A1 state of CH2, ^1Ag state of Cs and the ground-states of H2, LiH, Li2 and H2O.     

Microwave Synthesis, Characterization and DNA-binding Properties of a New Cobalt（ Ⅱ ） Complex with 2,6-Bis（benzimidazol-2-yl）pyridine

A new cobalt(Ⅱ) complex with tridentate ligand 2, 6-bis (benzimidazol-2-yl)pyridine has been synthesized by microwave irradiation method and characterized by elemental analysis,electrochemical and spectral methods. The binding of the complex with calf thymus DNA has also been investigated by absorption and fluorescence spectra.     

β方石英的振动光谱和方石英的相变

利用价力场模型计算了β方石英振动光谱横模的全部基频和简正模式。基频的计算值与β方石英的喇曼和红外光谱的观测值符合得很好。由此提供了一组甚好的β方石英的力常数。讨论了方石英αβ相变，并提出α方石英的软模Ｂ２６ｃｍ－１在此相变中起着基本作用     

核磁共振碳谱的研究:烷烃分子的化学位移δ与原子距边矢量μ

系统研究了核磁共振碳谱及其化学位移规律性。并提出了一种新的分子图论参数：原子距离－边数矢量（μ矢量），并发现它与烷烃的１３－ＣＮＭＲ有良好的相关性。     

时滞格微分方程组的行波解

本文利用Schauder不动点定理的方法和上、下解技巧,研究了时滞格微分方程组的行波解,给出了当系统的非线性项满足“拟单调条件”和“指数拟单调条件”时行波解的存在性.