The failure of the powder metallurgy valve seat was analyzed by optical microscopy, scanning electronic microscopy, X-ray energy spectrum and X-ray diffraction.

采用力学、物理性能测试，金相、扫描电镜、能谱和X衍射分析研究了气门座圈产品失效的主要原因。

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Two difference deviations, random fluctuation and system linear deviation have been imitated, their influences on X-ray energy distinguish power have been compared.

本文还比较了膜厚无规涨落与系统线性偏差这两种偏差对单色器能量分辨率的影响，计算的结果表明后者的危害较大。

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The quantity and the speed of creating image of the industrial CT closely relate to the accelerator's focus, the highest X-ray energy, X rays dose and dose uniformity.

加速器电子束的焦点、X射线的最高能量、X射线剂量及均匀性与工业CT成像的质量和速度密切相关；

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The National Osteoporosis Foundation says a test called Dual-energy X-ray absorptiometry,or DXA, is the best test for osteoporosis.

VOA: special.2010.08.31

The LEXID (Lobster Eye X-ray Imaging Device) functions by "radiating objects with tiny amounts of X-ray energy, " subsequently allowing its user to see behind steel, wood or concrete.

ENGADGET: LEXID prototype gun can peek through walls

Those studies have until now focused on a fairly low-energy X-ray range.

BBC: First glimpse of a black hole's spin

"Wise is finding them across the full sky, while Nustar is giving us an entirely new look at their high-energy X-ray light and learning what makes them tick, " he said.

BBC: Supermassive black holes and hot galaxies in giant haul