placement

首先用雷克子波合成正演地震记录，得到较好的记录结果，然后用此结果进行F-K的波长延拓，得到偏移结果。(The first wave of synthetic forward with Leike Zi seismic records, the records get better results, then use the results of FK wavelength extension, to be offset results.)

《MATLAB神经网络30个案例分析》中的第7个例子，案例7 RBF网络的回归-非线性函数回归的实现。希望对大家有一定的帮助！ (The MATLAB neural network analysis of 30 cases of example, 7 cases of RBF network return- the return of nonlinear function implementation. Hope to have certain help to everybody! )

C实现应用程序框架的经典代码C application framework to achieve the classic code(C application framework to achieve the classic code)

Implementation of fuzzy system with matlab in case of "Choosing of Study".

Fourier basis expansion(Fourier basis expansion matlab)

说明：  matlab将STK中卫星轨道数据导出函数(interface for transforming STK data into Matlab)

用差分法解一类Bessel方程在不同边界条件下的离散解(difference method for solving a class of Bessel equation in different boundary conditions of the Discrete Solutions)

三维电磁场FDTD程序（3D-FDTD matlab）PEC边界( 3-D FDTD code with PEC boundaries )

sorce code for imageprooceesin with matlab code

DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)