Lyapunov exponent (2)

这是matlab的代码，用于lfmsk雷达波形和比相法测角的仿真代码，望有用的人自取(this is used to simulate the lfmsk and angle figuring)

提取中尺度WRF模式指定高度处的风向时程(To extract time series of wind direction at specific height)

一个简单的排队系统仿真应用，可用于理发店等单队列的场合。(A simple queuing system simulation application, can be used for a single queue barber shop and other occasions.)

说明：  基于光混频器和锁相环的零差相干通信仿真模块，可观察锁相动态过程(Simulation of Homodyne Coherent Communication Based on Optical Mixer and PLL)

说明：  利用netcd库 python语言读取nc气象文件(Using Python language of netcd library to read NC meteorological files)

说明：  为了感谢惠俊英老师的谆谆教诲，特为好奇诸君再奉上水声物理--海洋传播声场模拟的一份武林秘籍！ 当好奇诸君阅毕此卷，又轻松跑完9份作业（9路招式），即悟简正波海洋声场传播模型之能耐！ KRAKEN与AcousticsToolbox遵照GNU公共许可证进行分发。感谢Michael B. Porter对KRAKEN的原创。也感谢由Free Software凝聚起来的自由科学家社区。 本秘籍适合大三以上和非水声物理专业同志们的快速参学。 吴开明 2018.12(The KRAKEN model was initially developed as a research code to evaluate new algorithms. As such it required numerous modifications to be usable as a production code. This work was begun at the Naval Ocean Systems Center and continued at the Naval Research Laboratory in support of the research on matched-field processing.)

主要功能：1.利用油水井井位坐标绘制井位图；2.利用油水井注采液量数据绘制动态曲线图；3.利用油水井注采液量数据，根据容阻模型对井间连通性进行反演，求取注水井注水量平面分配系数，并进行可视化展示。 技术特点：软件自动读取井位信息及油水井注采液量数据，根据改进的容阻模型，利用基于遗传算法的混合优化算法来对模型进行求解，确定表征注采对应关系的参数——连通系数和时间常数，量化表征了注采对应关系，从而指导油田生产为油田开发管理者提供了科学的决策工具。(Main function: 1. wells wells wells by using the coordinate drawing graph; 2. the use of water injection wells drawing dynamic curve of fluid data; 3. the use of oil and water wells injection fluid volume data, according to the volume resistance model of inter well connectivity inversion for the water injection volume plane distribution coefficient, and visual display. Technical features: the software automatically reads the information and the oil injection wells fluid volume data, according to the volume resistance model improved by genetic algorithm, the hybrid optimization algorithm to solve the model based on the determined parameters correlation characterization of injection - connectivity coefficient and time constant, the quantitative characterization of the injection production relationship, so as to guide the oil field the production provides a scientific decision-making tool for oilfield development management.)

说明：  DTU控件实例，供DTU爱好者学习。。。(dtu activety,good for new learner.)

ABAQUS材料本构的二次开发讲解，详细说明。(Introduction to the secondary development of ABAQUS material constitutions.)

Abaqus子程序，GTN孔洞损伤模型， 用于材料的损伤模拟(Abaqus subroutine, GTN hole damage model)