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secondary diffraction
相关语句
  二次衍射
     Studies by means of convergent-beam electron diffraction show that the space group of spinel MgAl_2O_4 is Fdm and that h+k=4n+2 weak diffraction spots are the result of high-order secondary diffraction.
     m。 同时确认其h+k=4n+2的弱衍射斑的出现是高阶二次衍射所致。
短句来源
     modulation technique is an ingenious application of Abel secondary diffraction image formation.
     θ调制技术是阿贝二次衍射成像原理的一种巧妙应用 .
短句来源
  “secondary diffraction”译为未确定词的双语例句
     2) the secondary diffraction and drag loading being in direction opposite to that of incident shock wave as a result of plate reflection;
     (2)由挡板反射回来产生的二次绕流、拖曳荷载,方向与入射激波方向相反;
短句来源
  相似匹配句对
     Study of grating diffraction stripe secondary maximum
     光栅衍射条纹次极大强度研究
短句来源
     Study of grating diffraction stripe minimal secondary maximum
     光栅衍射条纹的最小次极大强度研究
短句来源
     On the secondary spectrum
     关于二级光谱问题的探讨
短句来源
     The X-Ray diffraction and
     利用全港X射线衍射分析提取微结构参数如球镍的层错缺陷结构参数和储氢合金的微结构信息以及利用织构分析探讨电极材料的织构生长特性。
     Secondary cut
     二次掏槽
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查询“secondary diffraction”译词为用户自定义的双语例句

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Since the 7O′s many overseas scholars have cast doubt on the validity of crystal structure of spinel and thought its space group should be F3m. Studies by means of convergent-beam electron diffraction show that the space group of spinel MgAl_2O_4 is Fdm and that h+k=4n+2 weak diffraction spots are the result of high-order secondary diffraction.

70年代以来,国外一些学者发表文章对尖晶石的晶体结构提出质疑,认为其空间群有可能是F(?)3m。我们应用会聚束电子衍射对其研究,结果测定尖晶石的空间群应是Fd(?)m。同时确认其h+k=4n+2的弱衍射斑的出现是高阶二次衍射所致。

The [100] electron diffraction patterns have been taken for four orthopyroxenes collected from four types of rocks.(The composition of the end members ranges from En_(96.6) Fs_(3.4) Wo_0 to En_(47.6( Fs_(53.1) Wo_(1.1). ) The k odd diffractions themselves are completely present on these patterns. Based on the experimental observation and theoretical analysis, the authors believe that these k odd diffractions are caused neither by the overlap of certain diffractions from higher levels of orthopyroxene itself...

The [100] electron diffraction patterns have been taken for four orthopyroxenes collected from four types of rocks.(The composition of the end members ranges from En_(96.6) Fs_(3.4) Wo_0 to En_(47.6( Fs_(53.1) Wo_(1.1). ) The k odd diffractions themselves are completely present on these patterns. Based on the experimental observation and theoretical analysis, the authors believe that these k odd diffractions are caused neither by the overlap of certain diffractions from higher levels of orthopyroxene itself or clinopyroxene-C2/c exsolution Iamellae nor by the diffuse streaks along the a~* axis or the secondary diffraction effect. It is implied that there is no b-glide plane in the space group of orthopyroxene. As the four samples are of wide representation in composition and occu- rrence, the authors come to a conciusion that the space group oforthopyroxene should be P2_1ca, but not Pbca under normal pressure and temperature conditions.

作者选择成分不同、产状各异的四个斜方辉石样品,分别沿其[100]方向进行了电子衍射分析。通过对实验结果的认真分析和充分论证,作者断定它们的空间群均为P2_1ca,而非Pbca。由于实验样品在成分和产状上均具有广泛的代表性,因此可以推断,在常温常压下,自然界的斜方辉石之空间群均为P2_1ca。

Radar scattering characteristic of the aircraft is an important factor for its survivability.Wing is the important scattering source on the aircraft, when direct reflection is controlled.Physical optics and physical theory of diffraction are used to calculate radar cross section of the wing in this paper. Not only the scatter of the face and trailing edge, but olso the scatter resulting from wedge by dissecting wing into discontinuos face is considered in the calculation. It is shown that using this method satisfactory...

Radar scattering characteristic of the aircraft is an important factor for its survivability.Wing is the important scattering source on the aircraft, when direct reflection is controlled.Physical optics and physical theory of diffraction are used to calculate radar cross section of the wing in this paper. Not only the scatter of the face and trailing edge, but olso the scatter resulting from wedge by dissecting wing into discontinuos face is considered in the calculation. It is shown that using this method satisfactory precision can be obtained, through compared calculating results with experiment. Radar scattering characteristic is analysised and some conclusions about the scattering peaks of leading edge and trailing edge are obtained.The effect of secondary diffraction should be further considered for perpendicular,polarization.

飞机雷达散射特性是影响飞机生存力的重要因素之一.在镜面反射得到控制后,机翼成为影响飞机雷达散射特性的重要散射源.利用物理光学和物理绕射理论计算机翼的雷达散射截面(RCS).在计算中不仅考虑了机翼表面和后缘尖劈的散射,而且也考虑了由于翼面分块造成翼面不连续而形成的尖劈散射。将理论计算结果与实验进行比较,证明计算方法是相当精确的.对机翼的散射特性进行分析,得到一些有关前缘散射波峰和后缘散射波峰的重要结论.指出对于垂直极化还需进一步考虑二次绕射的影响.

 
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