first degree approximation

基本解釋

The first method is to subject the cell means to an analysis of variance, the second method uses the individual observations and KENWARDROGER approximation for calculation of degree of freedom.
前者以組平均數為基礎進行方差分析，后者以原單個數據為基礎并采用KENWARDROGER法確定自由度進行分析。
Based on principal state of polarization theory and first-order approximation, an analytical expression of signal degree of polarization(DOP) depending on polarization-mode dispersion(PMD) was given.
依據主偏振態(tài)理論和一階偏振模色散（PMD）近似，給出了信號偏振度（DOP）與PMD的解析關系式。