composite_streng_compute

belief propagation algrithm

说明：  使用fortran编写的无网格（光滑质点流体动力学）SPH算法(using FORTRAN prepared by the non-grid (smooth particle hydrodynamics) SPH algorithm)

FFT+FT连续细化傅立叶变换分析校正法 还请各位多多指教。 参考自丁康老师《离散频谱校正技术》 (FFT+ FT for Fourier transform analysis of detailed correction method is also called upon the exhibitions. Ding Kang reference from the teacher, " Discrete Spectrum Correction" )

很好的最小二乘求解工具，经典算法的c语言版本实现(A MINPACK-1 Least Squares Fitting Library in C)

带LASSO修正的LARS算法 稀疏表示(LARS with LASSO modification Sparse Representation)

高分辨率要求系统具有大的带宽，瞬时带宽的增加必将提高系统对硬件的要求，本文采用方便灵活的步进频率波形信号。脉间频率步进波形通过子脉冲载频的步进变化来获得大的有效带宽，使成像具有高分辨率，采用加窗和补零方法提高信噪比，但该信号对目标径向速度非常敏感。采用补零方法提高距离取样分辨率，使距离像细化，并用公式说明了补零只能提高距离取样分辨率，并不能改变频率步进信号的距离分辨能力。该信号波形对目标径向速度的敏感，使目标能量分散到邻近的距离单元造成距离分辨率下降，如果不事先进行速度补偿，直接对回波信号进行逆傅立叶变换，将使所成一维距离像发生频谱展宽，并伴有距离像发生平移。本文证明了当目标有径向速度时仍采用对回波信号直接进行逆傅立叶变换的方法将使一维距离像发生频谱展宽并伴有距离像发生频移，从而严重影响了一维距离像的质量。(high-resolution requirements of the system with large bandwidth, the increased instantaneous bandwidth will improve the system of hardware, In this paper, a flexible and convenient step frequency signals. Pulse frequency step-pulse waveform through the carrier frequency step to achieve great changes in the effective bandwidth. make imaging with high resolution, increasing the window and fill methods to improve signal-to-noise ratio is, However, the signal on the target radial velocity is very sensitive. Using zero-distance sampling method to improve resolution, so that distance as refinement, and formulates a zero-distance sampling can improve resolution, does not alter the frequency of the signal from stepping resolution capabilities. The signal waveform on the target radial velocity sens)

说明：  用四阶Runge-Kutta法解延迟微分方程组，用到的朋友看一下啊(Using fourth-order Runge-Kutta method for delay differential equations, a friend used to look at ah)

波面的zernike多项式拟合，在光学测试领域应用相当广泛(Wave surface zernike polynomial fitting, in the field of application of a wide range of optical test)

说明：  金属断裂的数值计算提供理论依据及实际详例解读(The numerical calculation of metal fracture provides theoretical basis and interpretation of practical examples)

多元数据分析的主分量分析投影，LZ复杂度反映的是一个时间序列中，用MATLAB编写的遗传算法路径规划。( Principal component analysis of multivariate data analysis projection, LZ complexity is reflected in a time sequence, Genetic algorithms using MATLAB path planning.)