This essay discusses the pencils of lines resolution and the trajectory of what the projective pencils of lines composes, and tries to find a method for the point intersection between conic section and straight line .
本文从射影观点出发讨论圆锥曲线的线束分解和此射影线束构成的轨迹,并提出求圆锥曲线与直线交点的一种方法。
X-ray diffraction microbeam camera
X射线衍射微光束摄影机
XRP (X-Ray Photofluorography)
x射线荧光屏图象摄影
multi-exposure X-ray powder camera
多次曝光X射线粉末摄影机
x ray photoemission diffraction
x射线光电发射衍射
ultrasonic tomograph
超声层析X射线摄影机
scanning X-ray diffraction micrographic camera
扫描式X射线衍射显微照相机
nondiffraction X-ray spectrometer
非衍射x射线光谱仪
X-ray diffraction pattern computer
X射线衍射图谱计算机
circular X-ray diffraction camera
圆形X射线衍射照相机
x ray computed tomography
x射线计算机断层摄影法
computer-axial tomography
计算机化轴向层析 x射线摄影法
microbeam X-ray analyzer
微束X-射线分析器
Performance of a soft x-ray splitter grating parallelism measuring system by diffraction method
衍射法X射线激光分束光栅平行度测量系统(英文)
Differentiation of Laser Printer Toners by μ-XRF;
微束X射线荧光分析法鉴别激光打印机墨粉的研究
Closely related to PET is single- photon emission computed tomography, or SPECT.
与正电子发射X射线摄影技术密切相关的是单光子发射计算机化成像（SPECT）。
PET and SPECT images could be sharper, for example.
例如正电子发射X射线摄影技术和单光子发射计算机化成像都可更清晰一些。
a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays).
一摄影图像由对辐射表面敏感的以辐射线而非可见的光（特别以X射线或者γ射线）拍摄生产。
