GL method for solving equations in math-physics and engineering

In this paper, we propose a GL method for solving the ordinary and the partial differential equation in mathematical physics and chemics and engineering. These equations govern the acustic, heat, electromagnetic, elastic, plastic, flow, and quantum etc. macro and micro wave field in time domain and frequency domain. The space domain of the differential equation is infinite domain which includes a finite inhomogeneous domain. The inhomogeneous domain is divided into finite sub domains. We present the solution of the differential equation as an explicit recursive sum of the integrals in the inhomogeneous sub domains. Actualy, we propose an explicit representation of the inhomogeneous parameter nonlinear inversion. The analytical solution of the equation in the infinite homogeneous domain is called as an initial global field. The global field is updated by local scattering field successively subdomaln by subdomain. Once all subdomains are scattered and the updating process is finished in all the sub domains, the solution of the equation is obtained. We call our method as Global and Local field method, in short , GL method. It is different from FEM method, the GL method directly assemble inverse matrix and gets solution. There is no big matrix equation needs to solve in the GL method. There is no needed artificial boundary and no absorption boundary condition for infinite domain in the GL method. We proved several theorems on relationships between the field solution and Green＇s function that is the theoretical base of our GL method. The numerical discretization of the GL method is presented. We proved that the numerical solution of the GL method convergence to the exact solution when the size of the sub domain is going to zero. The error estimation of the GL method for solving wave equation is presented. The simulations show that the GL method is accurate, fast, and stable for solving elliptic, parabolic, and hyperbolic equations. The GL method has advantages and wide applications in the 3D electromagnetic （EM）     

3.7A GeV16O-Em作用α射弹碎片多重数分布

对3.7 A GeV16O-Em作用产生的α射弹碎片多重数分布进行了研究,得出电磁离解作用和核作用下α射弹碎片的分布服从不同的函数,说明在两种作用下碎片的产生机制不同.     

高临界温度超导材料超导性能的检测

高温超导体临界温度Ｔｃ的高低是超导材料性能良好与否的重要判据。本文根据超导体的基本特性（零电阻现象和完全抗磁性）讨论了临界温度Ｔｃ的两种测量方法：电阻法（即四引线法）和电磁感应法，并介绍了获得低于正常液氮沸点温度（７７Ｋ）的减压降温技术。文中给出了对ＹＢａ＿２Ｃｕ＿３Ｏ＿（７－δ）的两种测量方法的条件利结果。     

电磁场强化采油新技术

介绍了地层加热、清除油井结蜡和地层堵塞，提高注水能力，强化液流能力的电磁场强化采油技术，探讨了技术机理和在我国应用的前景。     

超强磁场的发生技术

磁场强度达到１００Ｔ时，在通电线圈中产生的电磁力接近４００ｋｇ／ｍｍ＾２，这是目前产用导体材料都无法承受的。超强磁场的发生技术是基于通电线圈被破坏之前的瞬间发生百特斯拉领域的高强度磁场的技术。     

Interpretation of Plateau in High-Harmonic Generation

The plateau in high-harmonic generation is investigated in the frequency domain. Probability density of an electron in an electromagnetic field is obtained through analysing the quantlzed-field Volkov state. The plateau of hlgh-harmonic generation reflects the spectral density of the electron at the location of nucleus after above-thre shold ionization.     

地震电磁信号接收方法探讨

本文提出一套有效接收地震电磁信号的方案,并介绍根据这一方案研制的接收机的性能。