安德森第七章喷管计算

transformer protection

HYPO71 is A Computer Program for Determining Local Earthquake Hypocentral Parameters, Magnitude, and First-Motion

基于abaqus编辑的用户自定义单元，二维四节点单元(the uel for 2d ELEMENT based on abaqus)

适合与岩土工程的摩尔—库伦的UMAT子程序，引用自陈卫忠老师的书中(Mohr- Coulomb and geotechnical UMAT subroutine reference book from Chen Weizhong teacher)

MATLAB GUI 的一些源代码！非常适合初学者！(MATLAB GUI source code! Very suitable for beginners!)

说明：  基于mises屈服准则的随动强化模型的umat子程序(Follow up reinforcement UMAT)

Compaq Visual Fortran Error Messages，对于利用CVF编程的programmer是本很好的对照手册。(Compaq Visual Fortran Error Messages, programming, programmer for the use of CVF is a very good control of the manual.)

此程序用于sgy地震数据添加噪声，输入文件名为pp.sgy，输出文件名为ppwithnoise0.8.sgy（可修改），参数d为添加的随机噪声系数（一般取0~1.0）。

说明：  一种优化算法， 帝王蝶优化算法,一种新的元启发式优化算法！((In nature, the eastern North American monarch population is known for its southward migration during the late summer/autumn the northern United States and southern Canada to Mexico, covering thousands of miles. By simplifying and idealizing the migration of monarch butterflies, a new kind of nature-inspired metaheuristic algorithm, called Monarch Butterfly Optimization (MBO), a first of its kind, is proposed in this paper. In MBO, all the monarch butterfly individuals are located in two distinct lands viz. Southern Canada & northern United States (Land 1) and Mexico (Land 2). Accordingly, the positions of the monarch butterflies are updated in two ways. Firstly, the offsprings are generated (position updating) by migration operator, which can be adjusted by the migration ratio.)

用于有限元软件Abaqus分析材料断裂的粘结区模型（CZM）子程序，由著名学者高彦飞编程，具有很高的参考价值。(ABAQUS allows the addition of a variety of user subroutines. We define a user element by UEL. Information of element and nodal displacements can be obtained from ABAQUS, and we update the stiffness matrix and the residual vector following the cohesive zone law. More coding details can be found in ABAQUS manual.)