principal phase

Since trigonometric functions are continuous at all points including the boundary of the principal value region, this technique naturally solves the problem of the break of phase differences and eliminates the data match error.

由于三角函数在主值区间内及边界处都是连续的，因此该方法解决了相位差在主值区间边界处的跳变问题，从而完全消除了相位差跳变引起的数据拟合错误。

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The generalized J-M sets for decimal index number have discontinuity and collapse, and their evolutions depend on the choice of the principal range of the phase angle.

小数阶广义M-J集出现了错动和断裂，且其演化过程依赖于相角主值范围的选取。

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As the principal drug, by a reverse-phase high-performance liquid chromatographic method ( RP-HPLC). Methods The extract of Qing ′ e Pill was refluxed with 75% ethanol, purified on an AB-8 macroporous adsorption resin column and then injected into HPLC system.

方法青娥丸提取物用75%乙醇提取，经AB8大孔吸附树脂纯化后，注入高效液相色谱仪。

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Study on Principal Crystalline Phase of Mullite Ceramics with Low Cost

低成本莫来石主晶相陶瓷的研究

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Conclusion: The axons in hippocampus were eugonic in the newly born rats. However, duration of embryo and adulthood may be the principal phase of the synaptic formation.

结论：大鼠海马在新生期处在轴突生长旺盛的时期，而在胚胎期和成年期是突触形成和建立的主要阶段。

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