sin(x)

说明：  关于J2塑性流动理论的金属3的材料本构隐式子程序umat(Implicit Subprogram UMAT for Material Constitutive of Metal 3 in J2 Plastic Flow Theory)

说明：  该蠕变子程序能够进行高温长时间应力下的应力应变分析以及松弛行为(The creep subroutine can be used for stress-strain analysis and relaxation behavior under high temperature and long time stress)

本代码为解决平面刚架问题，TXT文件为读入数据的格式

uel 开发的八节点单元，没有完全测试好，希望对开发者有所帮助(unit of the the uel development of eight-node, there is no fully tested, I hope to be helpful for developers)

粘塑性 晶体塑性有限元 基于abaqus平台 fortran 语言 有实列 亲测可用(Viscoplastic crystal plasticity finite element method based on real abaqus platform fortran language column pro-test available)

土木工程中适用于金属结构的John-cook模型，ABAQUS子程序umat。包含屈服准则，流动法则。完整描述了弹塑性应力应变关系。通过牛拉法迭代求解应力，并包含应变率相关信息。

此程序是用多重散射理论计算二维声子晶体的结构的Fortran代码。(This program is multi-dimensional phonon scattering calculated crystal structure Fortran code.)

利用简正波理论来计算声场，其中用到的思想可以在《计算海洋声学》中找到(using the nomal mode theary to compute the sound field)

线性相关 求逐月异常序列x(n,12)和y(n,12)(n是年)的相关系数r(24)，其中j=1～12是1～12个月的情形，13～22是冬、春、夏、秋、冬季逐月、春季逐月、夏季逐月、秋季逐月、逐月、年、冬半年逐月（NDJFMA）、夏半年逐月（MJJASO）的序列的情形。(Linearly related to demand monthly abnormal sequence x (n, 12) and y (n, 12) (n is the year) the correlation coefficient r (24), where j = 1 ~ 12 1 ~ 12 months is the case, 13 22 is a winter, spring, summer, autumn and winter month by month, month by month in spring, summer, month by month, the monthly fall, month by month, year, month by month in winter (NDJFMA), summer half year monthly (MJJASO) the sequence circumstances.)

美国牛人编写的以平面框架结构为基础的桥梁设计与校核软件，fortran90格式，已经调通，完全可以运行。(U.S. cattle were written in a flat frame-based bridge design and calibration software, fortran90 format, has been transferred through, can run.)