They come in many sizes - shapes - colors - and types of crystal 它们以不同体积大小、样式、多种颜色和水晶的多个类型流传于世。
Based on the reliability , stability and the ratio between performance and price when drivers works , theoretical evidences have been supplied to choose which type of crystals as tripling ones 在考虑驱动器运行的可靠性、稳定性及性价比的基础上,为工cf驱动器选择何种晶体( kdp还是kd , p晶体)作为三倍频晶体提供了理论依据。
The optimal length of crystal was achieved for the characteristics of quasi - three - level . three types of crystal were compared , we select lbo as the main frequency doubler . meanwhile , the other strong spectrum were restrained by suitable coating 从激光晶体的准三能级特性出发,充分考虑增益与损耗之间的矛盾,选择出最佳晶体长度;对三种倍频晶体进行了比较,选择出lbo作为主要倍频晶体;对膜系进行了必要的分析,在维持946nm谱线振荡的同时,充分考虑了其它激光谱线的抑制。
Abstract : the crystal structures obtained by static solidification and vibration solidification were compared . it was showed that , in the case of vibration solidification , the orientation growth of the columnar crystal was not obvious , the equiaxial crystal appeared more early . the grains of both types of crystals were quite fine , hardness in the full section was relatively high , and the hardness distribution was uniform . in the former case , the solute segregation in dendritical austenite more severe , and there were lumps of distortion inclusion 文摘:对球铁金属型静凝固与振动凝固的结晶组织对比表明:后者柱状晶方向性生长较弱,等轴晶出现较早,且两者的晶粒均较细,全断面硬度较高且分布均匀;前者枝晶奥氏体内溶质偏析大,有畸变夹杂团块。