Finally, based on the result of the feature select, gray ratio, Fourier descriptor and circularity were input to a three-layer Back Propagation ( BP) artificial neural network to distinguish the benign and malignant cases. 最后,在特征选择的基础上,先采用灰度比、似圆度和付里叶描述子作为BP人工神经网络的输入,进行良、恶性肿瘤的识别。
Based on the eigenstructure assignment result for descriptor linear systems, the parametric expression of the optimization index is obtained. 根据广义线性系统状态反馈特征结构配置结果,给出了优化指标的完全参数表示。