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ISOGEOMETRICAL SOLUTION OF LAPLACE EQUATION

介绍了 Cohen类双线性时频分布并针对交叉干扰项影响无法完全消除的问题进行了重排时频变换以提取及分辨 含有白噪声和窄带周期干扰的局部放电信号。处理仿真和现场检测到的局部放电超声信号时根据白噪声和窄带 周期干扰信号在时域上的平稳性特性发现重排 Cohen类时频变换方法不仅可以很好地将局放信号和背景噪声以 及窄带周期干扰信号分辨开来,而且大大减弱并抑制了交叉干扰项的影响,保持了更高的时频分辨率和时频聚集 性,从而验证了重排 Cohen类时频变换方法的有效性。 (In order to express the partial discharge ( PD) information of gas insulated switchgear ( GIS) in time-frequency domain, weintroduced theCohen? s class bilinear time-frequency distribution and its reassigned time-frequency transform method to pick up and distinguish theultrasonic signals in field from the whitenoises and narrow band periodic interference signals using the acousticemission ( AE) technology. After the processing of the simulated and PD ultrasonic signals in field, and according to the stationary feature of white noises and narrow band interference signals, wedraw a conclusion that the reassigned time-frequency distribution method can not only distinguish thePD signal from back ground noises and narrow band interference signals, but also decrease and restrain the influenceof cross-items, and acquire better time )

说明：  滑动DFT实现短时傅里叶变换的matlab代码，包括正变换和逆变换，可极大提高时频分析的计算效率(Sliding DFT to realize short-time Fourier transform matlab code, including positive and inverse transforms, can greatly improve the efficiency of time-frequency analysis.)

RFC1662 CRC-16 table generation and CRC checking. Implemented in embedded matlab with script to test and enable c/c++ code generation. Useful fo check against VHDL/Verilog and other embedded systems to help generate test vectors.

非对称的树形结构滤波器设计 并MATLAB仿真出图 显示一次二次等分解合成的误差值分析(The asymmetric tree structure filter design and MATLAB simulation diagram shows a two second decomposition synthesis error value analysis )

说明：  matlab中的二维布朗随机运动模型的算法代码(matlab in two dimensional Brownian motion model stochastic algorithm code)

通信系统的4qam盲均衡程序，希望对大家有点帮助(Communication systems 4qam equalization program, we hope to be helpful)

认知无线电中的频谱感知技术 包含单节点的检测和多点的写作检测(Spectrum-aware Detection of single-node Collaborative detection)

说明：  在matlab环境下仿真随机信号，括号内为内容（正弦信号、白噪声信号、正弦信号附加白噪声三种信号形式） 的代码，计算该随机信号的相关函数和功率谱(In the matlab simulation environment, random signals, the contents of brackets (sinusoidal signal, white noise signal, sine wave signal form of three additional white noise) code, the calculation of the random signal correlation function and power spectrum)

此列程序产生31位gold码，平衡gold码，是由m序列优选对生成(This column procedure produced 31 gold code, balancing the gold code is generated by the m sequence)