随机调制信号下的模拟ppm，利用最小二乘法进行拟合多元非线性方程，基于掌纹识别的在线身份验证 识别算法本科毕设。- Random ppm modulated analog signal under Multivariate least squares fitting method of nonlinear equations, Verify recognition algorithm based on palmprint recognition undergraduate complete set of online identity.