BEBO改良法计算甲基自由基攫氢反应的活化能

有机化合物与甲基自由基之间许多反应的氢迁移活化能至今未曾计算,本文采用经下列改良的原始BEBO法作了计算:(1)用现在测得的稀有气体分子间势能代替Lennard-Jones势能;(2)采用改良的Pauling键长-键级关系式;(3)计及了经两种不同方法完成的隧道效应校正.计算结果与实验甚为吻合.     

A CLASSICAL TRAJECTORY STUDY BASED ON MBE POTENTIAL ENERGY FUNCTIONS—REACTIVE COLLISIONS OF C＋CH

Classical trajectories have been calculated for the reaction C CH→C2 H using many-body expansion(MBE) potential energy function of C2H.The present work gives the reactive cross sections at relative kinetic energy of 1.0,7.5,13.0,20.0and 30.0 kcal,From which it is found that this is a reaction without energy thres-hold.     

NONLINEAR OPERATOR APPROXIMATION THEORY BASED ON DEMI-REGULAR CONVERGENCE

§1.Introduction Regular operator approximation therory,developed in[3]and[4],pertains to nonlinear operators with certain inverse compactness ptoperties The results give the seistence of solutions of equations and the convergence of approximate     

利用测磁结果求得等时垫补线圈的效率函数

为了避免分离扇迴旋加速器磁场等时化过程中出现的非线性现象所引起的不方便, 我们已利用测磁结果求得了GANIL研究所SSC2等时垫补线圈的效率函数.     

芳基硅烷、锗烷、锡烷的合成与表征

有机金属聚合物的研究近几年得到了很大的发展,含金属Ｓｉ、Ｇｅ、Ｓｎ的有机聚合物表现出特殊的导电性、非线性光学性等。我们合成了含Ｓｉ、Ｇｅ、Ｓｎ的有机金属聚合物的中间体芳基硅烷、锗烷、锡烷。合成路线如下:ａ:Ｒ=Ｍｅ,Ｍ=Ｓｉ;ｂ:Ｒ=Ｐｈ,Ｍ=Ｓｉ;ｃ:Ｒ=Ｐｈ,Ｍ=Ｇｅ;ｄ:Ｒ=Ｐｈ,Ｍ=Ｓｎ1　实验部分1 1　仪器和试剂原料均为化学纯,所有溶剂都经过严格的无水、无氧处理,所有反应均与Ｓｃｈｌｅｎｋ操作线连接;质谱:ＨＥＮＬＥＴＴＰＡＣＫＡＲＤＭＳ5989;1ＨＮＭＲ:ＢＲＵＫＥＲＡＣ80ＭＨｚ;熔点测量:ＬＥＩＴＺＢＩＯＭＥＤ…     

Resonant two-photon ionization with high-order continuum states

In this paper,the resonant two-photon ionization of atoms with high-order con-tinuum state is studied.It's found that the C-C coupling among the continuum states enhancesthe two-level atomic Rabi oscillation,and the direct transition from the intermidiate excitedstate to the continuum weakens the Rabi oscillation.Therefore the photoelectron energy spec-tra and the population are changed.     

FINITELY GENERATED COMMUTATIVE ARCHIMEDEAN SEMIGROUPS

In this work commutative Archimedean finitely generated semigroups are characterized in terms of ideal extensions.     

DRAG ON SUBMICRON NANOPARTICLE AGGREGATES

A new procedure was developed for estimating the effective collision diameter of an aggregate composed of primary particles of any size. The coagulation coefficient of two oppositely charged particles was measured experimentally and compared with classic Fuchs theory, including a new method to account for particle non-sphericity. A second set of experiments were performed on well-defined nanoparticle aggregates at different stages of sintering, i.e. from the aggregate to the fully sintered stage. Here, electrical mobility was used to characterize the particle drag. The aggregates are being built from two different size-fractionated nanoparticle aerosols, the non-aggregated particles are discarded by an electrofilter and then they are passed through a furnace at concentrations low enough not to induce coagulation.     

ON THE EXISTENCE OF POSITIVE ENTIRE SOLUTIONS FOR SINGULAR p-LAPLACE EQUATIONS

In this paper N-dimensional singular, p-Laplace equations of the following form are considered, where p ≥N, β > 0, and f : [0,∞)×(0,∞)×[0, ∞)→[0,∞) is a continuous function. Some sufficient conditions are obtained for the existence of infinitely many radially positive entire solutions of the equation which are asymptotic to positive constant multiples of |x|(p-N)/(p-1) for p > N or log|x| for N = p as |x|→∞.     

The PC—Based ATLAS Event Filter Prototype：Supervision Design,Implementation and Tests

The studies undertaken to prepare the Technical Design Report of the ATLAS 3^rd Level Trigger(Event Filter)are performed on different prototypes based on different technologies.we present here the most recent results obtained for the supervision of the prototype based on conventional,off-the-shelf PC machines and Java Moblie agent technology.