说明:双击或选中下面任意单词,将显示该词的音标、读音、翻译等;选中中文或多个词,将显示翻译。
您的位置:首页 -> 词典 -> 热束源
1)  beam source
热束源
2)  beam source
束源
3)  heat sources
热源
1.
Through discussing and studying the cause and heat sources of thermal deformation of machine tool,further analysis the effects on machining accuracy from thermal deformation of machine tool with theory analysis and experiments,and points out corresponding methods to control and prevent the thermal deformation,finally,guards against the machine tool thermal deformation effectively.
通过对机床的热变形产生和热源探讨与研究,用理论分析和实验2种方法进而分析机床热变形对于加工精度的影响,从而提出相应的控制与防止热变形的具体措施,对于机床热变形取得了良好的防范效果。
2.
Based on the characteristic of refriger- ant mixtures and variable-temperature heat sources, the matching performance criterion between them was renamed, the mathematical formula C(Ni,Tr) have been obtained.
在分析制冷工质与变温热源传热特性的基础上,对工质与热源匹配性能指标C进行重新定义,并结合不可逆损失Ni与匹配性能指标C和最小传热温差△Tmin之间的关系,通过实例计算,得到了提高循环效率的有效方法。
3.
Analysis of problems in the temperature field of 2D quasi-steady-state by BEM is made A specific expression about point heat sources in boundary integral equation is derived and the matters needing attention in solving such problems are also discussed.
用边界单元法分析二维准稳态温度场,给出点热源项在边界积分方程中的具体表达式,讨论了解决这一问题需要注意的事项,最后给出一个算
4)  heat source
热源
1.
Finite element analysis of the point heat source heating a sheet metal;
薄板点热源加热的有限元分析
2.
The heat source question of household heating;
住宅分户供暖的热源问题
3.
On heat source of central heat supply in main city zone of Jincheng;
浅议晋城市主城区集中供热热源问题
5)  heating source
热源
1.
In this paper,the heating source of large vaporizer of LNG terminal in our country is ascertained from the comparison between air-heating vaporizer and liquid-heating vaporizer on the basis of design data.
基于中国某LNG接收站内大型汽化器的设计参数,从液体加热型汽化器和空气加热型汽化器的对比入手,确定了大型LNG汽化器的热源。
2.
This paper made a synthetic comparison in the initial investment and operating cost aspect for the civil building of envelope heat preservation,passive solar energy technology and three possible kinds of heating source systems——solar energy hot water,coal-burning center heating and electricity-regeneration boiler in Lhasa.
从初投资和运行费用方面,对拉萨市民用建筑的外围护结构保温、被动太阳能和民用采暖可能采用的三种热源系统——太阳能热水、燃煤集中供热和电蓄热锅炉供热进行了综合比较。
6)  thermal source
热源
1.
About the thermal source of hot springs in Fujian Province,there are many genetic hypothesis.
主要介绍了福建温泉的水温、水量、水质、水热异常区大小、空间分布以及产出的地质、地貌的特点,对福建温泉的主要热源观点进行讨论,并对福建温泉的热源、成因和温泉的构造意义提出初步的想法。
2.
Furthermore,the influences of three different electromagnetic field models on the thermal sources and temperature distribution are analysed by 3D temperature field calculation.
在此基础上,结合三维温度场计算,分析了3种不同电磁场模型对转子热源和温度分布的影响,并与试验数据进行了比较。
补充资料:热束源
分子式:
CAS号:

性质:产生分子束的装置。可分为隙流束源和超声分子束源。隙流束源(effusive beam source)是采用加热的方法使分子(如钠)蒸发,从狭缝中射出,经一准直孔把发散的分子挡掉,可得一束较窄而直的分子束射向反应室。束源出口小孔的尺寸要小于束源内分子热运动的平均自由程,束源内分子速度是按玻尔兹曼分布,分子速度分布相对较宽,发散角大,因而束强较小。隙流束源又称热束源、扩散束源、炉束源等。超声分子束源(supersonic molecular beam)气体分子从喷嘴射出,经出口孔、准直器进入真空室。其特点是束源强度大,沿轴线方向流动使束的发散性得到抑制;由于向真空绝热膨胀,温度可降低到小于20K;速度分布窄。由于马赫数M(=束流速度/声速)可达几十(超音速),故又称超声分子速。分子束的强度即束强(beam intensity),是单位时间通过与入射束运动方向相垂直的单位面积的粒子数。束流(beam flux)是单位时间内射到检测器上的粒子数,也称通量。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条