3

raytracing program for seismic forward modeling

小型车载雷达的原理仿真。使用线性调频连续波（LFMCW）波形，探测公路环境下的周围车辆目标，使用距离多普勒方法显示目标的距离和速度信息，并对LFMCW的探测原理做了演示。(Principle small car radar simulation. Using a linear frequency modulated continuous wave (LFMCW) waveform, vehicle detection highway around the target environment, using the Doppler method to display the distance and speed information the target, and the detection principle LFMCW made a presentation.)

我们提出了一种新的方法来实现全光 微波使用光纤布拉格光栅阵列滤波 相同的反射率。确定了过滤器攻丝系数 通过一个宽带光源的光谱分布和 光栅的中心波长。由于光纤布拉格 光栅有相同的反射率，其特征 高均匀度的光栅是可能的，从而简化了 光纤布拉格光栅的制作，降低了实现 错误。此外，该宽带光的光谱分布 源可以控制使用的光学过滤器，可用于 控制滤波器系数的滤波器的旁瓣抑制。一个 微波滤波器采用四个光纤布拉格光栅的实验 实施。 (We propose a novel approach to realizing all-optical microwave filtering using an array of fiber Bragg gratings with identical reflectivities. The filter tapping coefficients are determined by the spectrum profile of a broadband light source and the central wavelengths of the gratings. Since the fiber Bragg gratings have identical reflectivities, the characteristics of the gratings with high uniformity are possible, which simplifies the fiber Bragg grating fabrication and reduces the implementation error. In addition, the spectrum profile of the broadband light source can be controlled using an optical filter, which could be used to control the filter coefficients to suppress the filter sidelobes. A microwave filter using four fiber Bragg gratings is experimentally implemented.)

truss solver with bridge

偏振复用正交相移监控通信系统信噪比理论值计算(Polarization multiplexed quadrature phase shift monitoring communication system signal-to-noise ratio theoretical value)

说明：  聚类分析的matlab源代码，文件中5种方法方法，每种方法都有测试数据(Cluster analysis matlab source code, documentation methods, 5 methods, each method has the test data)

钻井问题 可以在准备数学建模的时候作为练习资料(mathmodeling)

惯性导航研究中的轨迹发生器，用于模拟载体的机动运动(inertial navigation study the trajectory generator to simulate carrier mobile campaign)

Many synthetic aperture radar (SAR) image formation algorithms require the computation of a multidimensional Fourier transform of irregularly-sampled or unequally-spaced data samples. We apply a recently developed algorithm, the unequally-spaced FFT (USFFT),2 to SAR image formation and compare its accuracy and complexity to a conventional algorithm. We find that the USFFT algorithm allows comparable accuracy to traditional approaches at a slightly reduced computational cost. We briefly discuss extensions of the USFFT algorithm to multiresolution SAR imaging

good matlab files for rolling mill type models.............