查询词典 gamma ray

The VLA has been used to discover water on planet Mercury, radio-bright coronae around ordinary stars, micro-quasars in our Galaxy, gravitationally-induced Einstein rings around distant galaxies, and radio counterparts to cosmologically distant gamma-ray bursts.

科学家已藉由VLA发现水星上的水、正常恒星周围会辐射出明亮电波的日冕、银河系中的微类星体、遥远星系周围经重力作用产生的爱因斯坦环、以及遥远伽玛线爆发的电波同位对照影像。

The contribution of LAT blazars to the total extragalactic gamma-ray intensity is estimated.

最后我们估计了LAT blazars对河外伽玛射线背景辐射的贡献。

Methods In52patients to work out radiotherapeutic plan and set dosage distribu-tion on the basis of the carcinoma position,clinical target volume,patients health condition,and therapeutic aimwith stereotactic gamma ray body therapeutic system.

根据肿瘤的位置、临床靶体积、患者的身体状况与治疗目的，制定放射治疗计划及调整剂量分布。

Natural gamma-ray curves that include great amount of geological information can well reflect stratigraphic cycles caused by climate changes.

自然伽马曲线包含丰富的地质信息，能够很好地反映由气候变化引起的地层旋回。

The spectral shape of 47 Tucanae is consistent with gamma-ray emission from a population of millisecond pulsars.

观测到的47 Tucanae的辐射能谱和一族毫秒脉冲星的期望辐射相一致。

The observed gamma-ray luminosity implies an upper limit of 60 millisecond pulsars present in 47 Tucanae.

根据测量的伽玛射线光度我们得到47 Tucanae中毫秒脉冲星的数量上限为60个。

Take the glutenite reservoir in south slope of Chenjiazhuang Rize as a case, introduced are the applications of Natural gamma ray spectrometry logging data, such as zonation of reservoir, unpermeable layer and fracture discrimination, analysis of forma...

以陈家庄凸起南斜坡带砂砾岩油藏为例，介绍了自然伽马能谱测井在储层划分、隔层和裂缝的识别、储层敏感性分析以及油层识别等方面的应用。

Natural gamma ray spectrometry log ; glutenite reservoir ; unpermeable layer ; reservoir sensitivity ; oil layer

自然伽马能谱测井；砂砾岩储层；隔层；储层敏感性；油层

The process of the invention mainly comprises disintegrating substrate material of waste printing wiring board into particle material whose particle size is 0.5-3.5 micron, the mixing with double bond reactant, adding with phenyl ethene, conducting reaction under gamma ray irradiation condition, modifying substrate material particles, then commixing material which is treated with acrylonitrile-butadiene-styrene, wherein the adding quantity of substrate material particle is 35%-35%, conducting extrusion pelleting for commixing material on a plastic extruder, wherein extruding temperature is 200-250 DEG C, and finally obtaining plasticity plastic particles with excellent property.

本发明方法主要是：先将废旧印刷线路板基板材料粉碎成为粒径为0.5～3.5微米的颗粒料，然后与具有双键的反应物混合，再加入苯乙烯，并在γ射线的辐照条件下进行反应，将基板材料颗粒进行改性处理。

The films are developed and the degree of fogging observed is a measure of the gamma-ray exposure .

经显影之后，可以根据观察到的模糊发黑程度来确定r射线的照射程度。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。