1)helium[英]['hi:li?m][美]['hil??m]氦
1.Analytical method of helium in liquid hydrogen;火箭推进剂液氢中氦的分析方法
2.Implanting Helium into Nanocrystalline Hydrogen Storage Alloy (In Chinese);纳米贮氢材料充氦技术研究
3.Gas Chromatographic Analysis of Helium, Neon and Hydrogen in Natural Gas;气相色谱法分析天然气中氦氖氢
英文短句/例句
1.The antimatter equivalent of helium.反氦与氦等价的反物质
2.Continuously tunable helium replenisher for long lifetime He-Cd laser长寿命氦-镉激光器连续可调氦补充器
3.Preparation of Helium-charaged Nanocrystalline Film and Study of Its Helium Storage Characteristic;含氦纳米膜的制备及其固氦特性研究
4.Thermodynamic Property of Helium-3 and Pulse Tube Refrigeration with Helium-3 and Helium-4 Mixtures;氦-3热力学性质和氦-3/氦-4混合工质脉管制冷性质研究
5.He-Ne laser accupuncture therapy氦氖激光针灸理疗仪
6.high pressure helium gas scintillation counter高压氦气闪烁计数器
7.Helium was discovered on the sun.氦是在太阳上发现的。
8.low voltage He filled proportional counter低压充填氦正比计数器
9.Examination for helium leak detectingGB/T15823-1995氦泄漏检验
10.emissive helium-plasma detector放射氦等离子体检测器
11.helium-mercury direct nuclear laser氦汞直接核抽运激光器
12.Helium and neon are inert gases.氦和氖为惰性气体。
13.helium mass spectrometer leak detectorGB/T13979-1992氦质谱检漏仪
14.Unlike helium-4, it cannot be produced by radioactive decay.与氦－4不同之处是，氦－3不能由放射性衰变产生。
15.Study on ~3He-~4He Mixture Model and Thermophysical Properties;氦-3/氦-4混合物模型及热物理性质研究
16.Phase equilibrium diagram of the liquid helium isotopes mixtures at extremely low temperatures低温下氦-3/氦-4液态混合物相平衡关系
17.Calculating Ground State Energys of Helium Atom and Quasi-heliumion by Use of Approximation Model用近似模型计算氦原子和类氦离子的基态能量
18.Effect of Carbon Doping on Helium Behavior in Aluminum Studied by Thermal Helium Desorption Spectrometry氦热脱附谱研究碳掺杂对铝中氦行为的影响
相关短句/例句
He氦
1.The effect of He-Ne laser intravascular irradiation therapy on the hemorrheology and anti-oxidizing power in severe traumatic brain injury;氦氖激光血管内照射对重型颅脑损伤患者血液流变学及抗氧化能力的影响
2.Effects of He-Ne laser repeated irradiation on expression of gene-associated with apoptosis in scar fibroblasts in vitro;氦氖激光重复照射对培养瘢痕成纤维细胞凋亡相关基因表达的影响
3.The thermal desorption was used to investigate the He release from titanium tritide films with He and Ti atom ratio n(He)/n(Ti) from 0.在低于1 300 K范围内,氚化钛膜共有4种氦的热释放峰,分别对应于贯穿至表面的氦泡、近表面的氦、体相中的氦泡和氦的小团簇。
3)He bubbles氦泡
1.Below 1 300 K in helium desorption spectra there are four kinds of peaks that account for He bubbles punching up to the surface,the helium near the surface,He bubbles and He cluster.在低于1 300 K范围内,氚化钛膜共有4种氦的热释放峰,分别对应于贯穿至表面的氦泡、近表面的氦、体相中的氦泡和氦的小团簇。
4)Helium-3氦-3
1.Vaporization heat and melting heat of helium-3;氦-3的汽化热和熔解热
2.Equation of State and Thermophysical Properties of Helium-3;氦-3状态方程及热物理性质研究
3.Survey on Thermodynamic and Transport Properties of Helium-3;氦-3热力学性质和传输性质研究
5)helium[英]['hi:li?m][美]['hil??m]氦气
1.The preliminary study of small centrifugal compressor compressing helium in a closed cycle;小型离心式压气机压缩氦气闭式循环的初步研究
2.Design and study of a reciprocating helium compressor;大功率活塞式氦气压缩机的研制
3.Solid Lubrication Technology of HTG R under Helium;高温气冷堆氦气气氛下的固体润滑技术
6)Liquid helium液氦
1.Theoretical research on shock compression properties of liquid helium at high temperature and density;高温高密度液氦冲击压缩特性理论研究
2.Influence factors on separate two-stage pulse tube cooler working at liquid helium temperature;液氦温区分离型脉管制冷机性能影响因素
3.Comparison of calculation methods of limit of superheat temperature of liquid helium;液氦极限过热度计算方法比较
延伸阅读
氦氦helium一种化学元素，化学符号He，原子序数2，原子量4.002602，属周期系零族，为稀有气体的成员之一。元素的英文名称来源于希腊文hlios，含义是太阳。1868年法国P.-J.-C.让桑和英国J.N.洛克耶两位天文学家在利用分光镜观测太阳光谱时，发现一条不属于当时已知元素的黄线，他们肯定这是一种新元素。1888～1895年美国W.F.希尔布兰德和英国W.拉姆齐用硫酸处理沥青铀矿时，得到一种气体，用光谱分析证实它就是让桑和洛克耶发现的元素。氦在地壳中的含量极少，仅6.9×10-5％（重量百分），但在整个宇宙中则仅次于氢，占23％。氦在空气中的含量为0.0005％，在天然气中则高达1％～2％。在沥青铀矿、独居石、钇铀矿、褐钇钽矿中也含氦。氦有两种同位素，氦4是主要存在形式，氦3是氚的放射性产物。氦氦是无色、无臭、无味的气体，熔点－272.2℃(2.5×106帕），沸点－268.9℃，气体密度0.1785克／升（0℃，1×105），帕界温度－267.8℃，临界压力2.26×105帕，在水中的溶解度8.61厘米3／千克水。氦有两种液相：He（I）为高温液相，是一种普通液体，当温度下降至2.18K时，He（I）变为He（Ⅱ），后者是一种超流体，具有气体性质。氦主要从天然气中获得或从以天然气为原料的工业生产中得到，例如以天然气为原料合成氨时，，可从尾气中回收氦。氦用于充填高空气球和飞艇，不会发生燃烧或爆炸。在焊接和熔炼稀有金属时用作保护气体。按一定比例配成的氦-氧混合气是供潜水员呼吸用的气体。还可做温度低于14K的超低温制冷剂和气相色谱法中用的载气。
