Based on the uniform geometrical theory of diffraction, the equivalent current is used to calculate the back scattering field for the finite cone.
在一致性几何绕射理论基础上，采用等效电流的方法给出了有限锥体在完全极化平面波照射下后向散射场的散射极化矩阵表示式。
Nanocrystalline nickel was synthesized by direct current electrodeposition. The microstructure of nanocrystalline nickel was studied by TEM and X-ray diffraction.
采用直流电沉积法制备了纳米晶体镍，用TEM和X -射线衍射等方法研究镀镍层的微观结构。
The far field diffractive pattern calculating formula for diffraction antenna with continuous phase structure is derived by current distribution method in antenna theory for the first time.
应用天线理论中的电流分布法，首次推导了具有连续位相结构的反射式毫米波衍射天线的远场衍射图计算公式。
By this way we can design high diffraction efficiency, as well as lager numerical aperture diffractive lens under current machine fabrication condition.
该方法在现有衍射透镜加工设备分辨率条件下，可提高衍射透镜的衍射效率，增大衍射透镜的数值孔径。
The structural change of PAN based carbon fibre by an electric current pulse was studied by means of X-ray diffraction(XRD) and transmission electron microscopy(TEM).
用X射线衍射（XRD）、透射电子显微镜（TEM）等技术研究了PAN基碳纤维在单电流脉冲作用下的结构变化。
Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction pattern and constant-current charge-discharge properties of pyrolysis carbon were studied.
元素分析、氮气物理吸附和X射线衍射分别考察了裂解炭的元素组成、BET比表面积以及微晶结构变化；
Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction pattern and constant-current charge-discharge properties of pyrolysis carbon were studied.
元素分析、氮气物理吸附和X射线衍射分别考察了裂解炭的元素组成、BET比表面积以及微晶结构变化；
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