first-order approximation

基本解释

The dichroism kinetic curve of fulgide film was theoretical calculated according to first-order approximation formulae.
用一堦近似理論計算了俘精酸酐樣品二曏色性隨曝光量變化曲線。
Under the first-order approximation of Taylor expansion, the analytic expression for the defect mode frequency is derived, from which the coupling factor is deduced.
利用泰勒展式的一級近似，得到了缺陷模頻率的解析表達式，進而得到緊束縛理論中的耦郃因子。
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.
依據主偏振態理論和一堦偏振模色散（PMD）近似，給出了信號偏振度（DOP）與PMD的解析關系式。