nonlinear

用于SHPB冲击动力学数值仿真的APDL建模后的KEY文件(KEY file after APDL modeling for numerical simulation of SHPB impact dynamics)

大坝变形的精确预测对其安全评价方面发挥着重要作用。为了进一步提高大坝变形预测精度，提出了一种改进的灰狼算法优化支持向量机的预测模型。通过引入非线性收敛因子和采用动态加权策略，提升灰狼算法优化支持向量机惩罚因子和核函数参数的能力，并以优化的参数来建立支持向量机大坝变形预测模型。选取实例数据，在与布谷鸟算法、差分进化算法、粒子群算法、基本灰狼算法优化的支持向量机预测比较中，实验结果表明，改进的灰狼算法对支持向量机参数的优化是有效的，可以提高大坝变形预测精度。(Accurate prediction of dam deformation plays an important role in its safety evaluation. In order to further improve the prediction accuracy of dam deformation, an improved grey Wolf algorithm is proposed to optimize the prediction model of support vector machine. By introducing the nonlinear convergence factor and using the dynamic weighting strategy, the gray wolf algorithm is improved to optimize the capacity of the support vector machine penalty factor and the kernel parameter, and the support vector machine dam deformation prediction model is established with the optimized parameters. The experimental results show that the Improved Grey Wolf algorithm is effective for the optimization of support vector machine parameters, and it can improve the accuracy of the deformation prediction of the dam.)

说明：  对于非线性模型的跟踪预估问题，摒弃额对非线性函数进行线性化的做法，采用无迹变换处理均值和方差的非线性传递问题。(For the tracking and prediction problem of the nonlinear model, the linearization of the non-linear function is abandoned, and the traceless transformation is used to deal with the non-linear transfer of mean and variance.)

说明：  本模型采用abaqus自带的connector连接单元建模，实现了钉节点的模拟(In this model, the connector unit of ABAQUS is used to simulate the nail node)

说明：  利用遗传算法求解TSP问题，具有比较实际的应用价值(It has practical application value to solve TSP problem by genetic algorithm)

说明：  通过对导热方程的推导，利用有限体积法，在matlab进行编程模拟，阐述对流传热的机理。(Based on the derivation of heat conduction equation, the finite volume method is used to simulate in MATLAB, and the mechanism of convective heat transfer is described.)

fluent教程（中文帮助+UDF完全使用手册）个人由英文文档翻译，仅供参考(Fluent tutorial (Chinese help +UDF complete manual) personal English translation of the document, for reference only.)

单相半桥式跟踪PWM逆变器仿真，电流滞环跟踪控制(Single phase half bridge tracking PWM inverter simulation, current hysteresis tracking control.)

matlab仿真程序，可以直接运行，是分数阶混沌研究的有效资料(Matlab simulation program, which can run directly, is an effective data of fractional chaos research)

说明：  MATLAB实现二级倒立摆稳摆过程，用MATLAB进行仿真建模，并做角度位置分析(MATLAB realizes the stabilization process of double inverted pendulum)