凸包最常用的凸包算法是Graham扫描法和Jarvis步进法.本程序用Graham扫描法实现凸包的绘制-convex hull of the most commonly used convex hull algorithm is scanning and Graham Jarvis stepping law. The procedures used G raham scanning method to achieve the convex hull mapping

分析交流系统串补引起的次同步谐振问题时，为实现频率扫描法与特征值法的优势互补， 提出结合2种算法进行分析的混合方法-Analysis of series compensation AC system subsynchronous resonance caused problems for the realization of the frequency scanning method with complementary strengths eigenvalue method proposed

频域波束成形算法，适用于所有一维和二维阵列的波束成形计算。对于采样时间较短的信号，采用了2次分段，对于采样时间足够的信号则只需要1次分段计算。计算结果包含成像图结果和各扫描点处的频谱结果-Frequency domain beamforming algorithm, applicable to all one-dimensional and two-dimensional array beam forming calculations. For shorter sampling signal,