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Matlab中进行二维离散傅立叶变换,并显示频谱图的方法。(two version discreate Forier Transemation baced on MATLAB)

PIT AMRITSAR IS A NEW RESEARCH GROUP IN MATLAB AND NS2 FOR BETTER CODES

这个算子算是图像历史上第一个特征点提取算法了，1977年提出的，很简单，拿来练手很合适。(This operator is the first feature point extraction algorithm in the history of the image. It was proposed in 1977. It is very simple and suitable for hand training.)

某石油公司计划建造一条由东向西的主输油管道。该管道要穿过一个有n 口油井的油田。从每口油井都要有一条输油管道沿最短路经(或南或北)与主管道相连。如果给定n 口油井的位置,即它们的x 坐标（东西向）和y 坐标（南北向）,应如何确定主管道的最优位置, 即使各油井到主管道之间的输油管道长度总和最小的位置?证明可在线性时间内确定主管道的最优位置。(An oil company plans to construct a east to west from the main pipeline. The pipeline to pass through an oil field n wells. Wells from each must have a pipeline along the shortest path (or South or North) connected with the competent Road. If given the location of oil wells in n, that is, their x coordinates (east-west) and y coordinates (north-south), should be how to determine the optimal position in charge of Road, even if the wells to the pipeline in charge of Road between the sum of the smallest length location? proved to be linear time to determine the optimal position in charge of Road.)

说明：  matlab版本的标准互信息函数，用于聚类指标的计算，可直接使用(normalized mutual information function for clusering performance evaluation (MATLAB version))

说明：  人工免疫算法的matlab实现，可直接运行(Artificial immune algorithm matlab to achieve, can be directly run)

[Numerical analysis]_ This algorithm computes the root of a function by the Pegaso method.

分析了电压型控制模式下的逆变器并网的电路结构和数学模型，提出了基于重复控制技术的光伏逆变器并网控制策略，仿真和实验结果表明方案满足逆变器并网要求。(Voltage control mode inverter grid circuit structure and mathematical model is proposed based on repetitive control technology photovoltaic inverter grid control strategy, simulation and experimental results show that the program inverter to meet and network requirements.)

针对于三维物体的曲线信息，对曲线进行5*5拟合，能够直接得到曲面的参数方程(For the curve in three-dimensional object information, the 5* 5 curve fitting, be able to direct surface parameter equation)

Butterworth high/low and band pass filters are applied to image...