four-phase

This thesis is about the armorial inscription in four parts, including origin and nature, phase and dating, classification of character font, and the study of tribe relationship.

本文是对商周青铜器族徽文字的综合研究，内容主要包括族徽文字渊源与性质、族徽文字分期断代、族徽文字分类以及族氏关系研究等四个方面。

The self induced phase matching in four wave mixing in a nonbirefringent single mode optical fiber has been observed.

报道了无双折射单模光纤中四波混频的一种新型相位匹配方式。

In single drive, asymmetric two phase parallel mechanism or symmetric three or four phase mechanism.

单驱动工况下必须采用非对称两相机构并联或对称三、相机构并联等结构形式.

The Generation of Cosine Pulse Signal with Four Phase Codes

余弦脉冲四相码信号及其产生

Chapter Four summarizes and analyses aseries of design principals in the conceptual phase of life-cycle architectural design;

第四章具体分析面向寿命周期设计初期应遵循的设计原则；