This paper introduces and compares several typical restoration methods for cable in the cable accidents, and considers that the signal-adding method, which is simple, feasible and effective, can be used as the rapid restoration method after the burnout or group-fracture of signal cable.

A derivative method combined with Fourier least square fitting was designed to process noised overlapped peaks.

In this paper,the authors study estimation of regressional coefficient in longitude data,Using information iteration in seemingly unrelated regression model,the authors give a new estimator which improves the least square estimator(LSE).