Phase derivation

相导───Phase derivation

From the derivation of the Gibbs phase rule. its expression is studied.───从相律推导出发，考察了如何正确表达相律。

methods of extraction, purification and derivation of food samples, the selection of phase and determination of the biogenic amines in different foods are discussed.───样品生物胺的提取、净化、衍生方法、流动相的选择以及不同食品中的生物胺种类及含量做了深入的探讨。

Theoretical derivation indicates that time averaged three-order cumulant of signals, which are from(random) phase harmonic processes, is nonzero and its one-dimension slice is also a harmonic process.───理论推导表明，随机相位谐波过程时间平均三阶累积量为非零值，而且其一维切片仍然是谐波过程。