The morphologies of one - dimensional gan nano structures were affected greatly by substrates . we can get different one - dimensional gan nano structures by choosing different substrates . among the products , smooth and straight gan nanowires on quartz substrates , long and transparent gan nanobelts on sapphire substrates , short gan nanorods on si substrates and gan nanopoles on gaas substrates were found , respectively 我们可以通过选择不同的衬底来分别合成形态不同的一维gan纳米结构，其中在石英衬底上合成的是平直的gan纳米线，在蓝宝石衬底上合成的是细长透明的gan纳米带，在gaas衬底上合成的是柱状的一维gan纳米结构，而在以衬底上合成的是粗短的gan纳米棒。
In order to facilitate the analysis of the minimum repeated unit cell , the following geometrical characteristics were assumed : ( a ) all the yarn segments parallel to a diagonal direction or braiding axis in all unit cells lying in the same layer of the perform are treated as forming inclined lamina or horizontal lamina after matrix impregnation , ( b ) fibers were considered to be straight and unidirectional 以精确的复合材料单胞模型为基础，从最小的可重复的单胞入手，对单胞的结构进行简化分析，认为纤维是平直的，将单胞中的四个不同方向的纤维束看成是空间四个不同方向的单向复合材料，纤维束的性能可以等价于单向复合材料的宏观性能。
The calculation results indicate that the starting performance of forebody / inlet with wedge - shaped lip is better than that with plane lip at low flight mach number . at high flight mach number , the performance of the forebody / inlets designed by the two methods is approximate . at low flight mach number , the starting performance of forebody / inlet designed by the method of constant shock wave intensity is better 结果表明：唇口带楔角的进气道在低飞行马赫数下的起动性能优于唇口平直的进气道；采用等激波强度和等激波角度方法设计的进气道在高飞行马赫数下的性能相近，在低飞行马赫数下，采用等激波强度方法设计的进气道起动性能较优。
The main crack of tiaohu formation are straight oblique - cracks and level crack , there are many scores in the crack . the length of cracks is long , and they cut across several layers . the average surface density of the cracks is 0 . 101 slips / m . the cracks in lucaogou formation is mostly net cracks , and there are solution on crack surface 条湖组的裂缝多为平直的斜交缝和水平缝，缝面多见擦痕，延伸长度大，切穿多套地层，裂缝面密度平均为0 . 101条米；芦草沟组裂缝多为网状裂缝，缝面有溶蚀现象，多存在于碳酸盐岩内，裂缝面密度平均为0 . 143条米。
The le - an oil field is located on the southern slope of dong - ying sag . there are two sets of ek basalt in its western block . depending on the drilling , the logging and the seismic date , tha ek basalt has the characteristics of high resistancs , the low sound wave defferance and faradic conductance , the smooth curve of self potential 乐安油田位于东营洼陷南斜坡上，其西区发育了两套孔店组玄武岩，根据钻井、测井、地震资料，孔店组玄武岩具有电阻率高、声波时差值和感应电导率值低、自然电位曲线平直的特点，地震波呈板状强反射；沉积期该区有有二次火山活动，玄武岩平面分布比较稳定，喷发方式为“裂隙式喷溢” ，火山口分别位于草12和草31井附近。
