peak line meaning in English

波峰线
桅顶至斜桁间短索
斜桁帆桁张索
斜桁后端收放索

Consequently , a synthesized method is presented in this thesis , which includes time - domain shifting , window - length changing and window - type changing ( the second time - domain sequence lags behind the first one with l points , performing n - point fft analysis on the first sequence and m - point fft analysis on the second one with different windows , and finally correcting peak lines )
利用这一原理提出通用的离散频谱相位差校正方法：时域平移+改变窗长+改变窗函数，即第二段时域序列比第一段滞后l点，采用不同窗函数对这两段时域分别作n点和m点的fft分析。
Study shows that the basic principles of three existed methods for phase difference correction on discrete spectrum are identical , by which the twice fft analysis through time - domain shifting time series or changing window ' s length is performed , and the spectrum by making use of the phase difference of two corresponding peak lines are finally corrected
在研究时域平移的离散频谱相位差校正方法和改变窗长离散频谱相位差校正方法的基础上，发现这几种离散频谱相位差校正法的基本原理是一致的，就是通过时移和加不同的对称窗进行两次fft分析，并利用离散频谱对应峰值谱线的相位差以求得频率和相位校正量。