拉登逆变换 radon

艾特同学录配套留言本(accolades website supporting the message)

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.)

对电机进行基于spwm的变频调速系统，来实现对异步交流电动机的转速调整与三相电流调整(SPWM-based variable frequency speed regulation system for motor)

发动机的map图绘制，可用仿真分析，性能对比(Map drawing of engine)

说明：  PSCAD柔直输电模型，送端和受端各包含2台发电机，供学习参考(The flexible transmission model of PSCAD includes two generators at the sending end and the receiving end for reference.)

改进的内聚力模型，二维四节点模型，运用xu-neldman(cohesive element by xu-neeldman)

基于光纤传感器FBG测试信号的傅里叶变换，注意均值求解，方便使用。(Based on the Fourier transform of the optical fiber sensor FBG test signal, pay attention to the mean solution, easy to use.)

ATP-EMTP直流输电环形接地极等效电路法仿真计算接地电阻模型(Equivalent circuit method of ATP - EMTP DC transmission ring ground electrode simulation calculation of grounding resistance model)

说明：  dq坐标系恒定直流源并网逆变器控制，PSCAD仿真软件(inverter in dq frame)

主要用于振动信号的频谱分析，用于判断信号中的故障频率(the fft analysis of the vibration signal)