单个圆形活塞换能器指向性

说明：  Matlab 有限元的分析全过程 ，包括前期建模，后处理(Matlab finite element analysis of the whole process, including pre modeling, post-processing)

汽车动力模型，包括：整车模型，发动机模型，ECU模型，变速器模型等。(Basic example : Gasoline vehicle)

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.)

高频高压开关电源，采用LLC软开关技术，多用于静电除尘领域(high frequency high voltage switch power supply)

机器人MATLAB m语言，实现关节机器人的运动学正解运算。算(Robot MATLAB M language, realize kinematic joint robot forward kinematics, inverse operation.)

分别对matlab和ansys两种平台的拓扑优化结果分析比较，为学习者提供了两种不同优化设计思路，过程详细清晰，易于学习理解(The analysis and comparison of topology optimization results between MATLAB and ANSYS two platforms provide two different optimization design ideas for learners. The process is clear and clear, and easy to learn and understand.)

说明：  在abaqus中可以实现零厚度的cohesive插入(Implementing cohesive insertion with zero thickness)

说明：  对事件触发控制进行仿真，并使其最终结果达到稳定(The event trigger control is simulated and the final result is stable)

阵元间频率增量按对数增加，发射波束不再按距离周期性出现，发射波束图最大值只有一个。相较于阵元间频率增量固定的传统频率分集阵列，log-FDA能够抗距离相关的干扰，而且发射能量不泄露，具有一定的低截获性能。(FDA with logarithmically increasing frequency offset to achieve a beampattern with a single maximum at the target location. FDA radar with uniform interelement frequency offset, its beampattern exhibits maxima at multiple range values. doe tu the multiple maxima, a number of reflectors located at any of the maxima can interfere the target-return, thus deteriorating SINR.)

采用simulink搭建IEEE标准33节点仿真模型及.m程序(IEEE standard 33 node simulation model)