NB-IoT downlink simulator

hht1.介绍2.非平稳数据处理方法回顾（声谱图、小波分析、WVD、改进谱、经验正交函数展开、其他各类方法）3.瞬时频率4.固有模态函数5.经验模式分解方法：过滤方法6.完整性和正交性7.希尔伯特谱8.确认和校准希尔伯特谱9.应用（经典非线性系统大量的结论、试验中得到的观测数据）10.讨论11.结论(1. Introduction 2. Non-stationary data processing methods Review (spectrogram, wavelet analysis, WVD, improving the spectrum, empirical orthogonal function expansion, other types of methods) 3. Instantaneous frequency of 4. Intrinsic mode function 5. Empirical Mode Decomposition Methods: filtering methods 6. completeness and orthogonality 7. Hilbert spectrum of 8. to identify and calibrate Hilbert spectrum 9. Applications (classical nonlinear systems a lot of conclusions, the trial in the observational data) 10. discussion 11. Conclusions)

关于MATLAB实现智能算法的书籍，以案例为基础，容易理解(The realization of MATLAB intelligent algorithm books, based on a case, easy to understand)

相控阵雷达及其仿真技术：蔡庆宇著，包括最优估计，非线性滤波，机动目标跟踪，系统仿真技术等内容，是学习相控阵雷达技术的一本重要参考书(phased array radar and simulation technologies : a Qingyu, including optimal estimation, non-linear filtering, mobile target tracking, System simulation technology, learning phased array radar technology an important reference books)

几篇关于机器学习的PPT课件。A few PPT coursewares about machine learning.(A few PPT coursewares about machine learning.)

北航弹道学ppt，其中包含几种典型弹道说明，典型防空阵地布置和放空区介绍，可用于仿真(Northern ballistics ppt, several typical trajectory shows typical anti-aircraft positions and vent area, it is used to simulate)

说明：  SLAM 例子2维激光雷达建图、包含路径、当前位姿、栅格地图(SLAM example 2D laser radar mapping, including path, current pose, raster map)

Git中文版介绍，新手必备，老手参考。 目前所知的最好的中文Git介绍。(Git Chinese version of introduction, novice, veteran reference. Currently the best known Chinese Git introduction.)

BOSCH汽车电气与电子，汽车电子电气行业专业书籍，是入门的必备书籍(BOSCH automotive electrical and electronic, automotive electronic and electrical industry professional books, is a necessary entry book)

专门用来识别红色的aruco码，区分blob(Special recognition of red aruco codes)

AuloCAD2000_ARx二次开发实例精粹[老大中](The Essence of AuloCAD2000_ARx Secondary Development Example)