This essay introduces the theory and method of helium mass-spectrum leak detection for vacuum system of condenser.
本文系统地介绍了凝汽器真空系统氦质谱检漏原理和方法。
Gas phase chromatography, mass spectrum and infrared spectrum are used to characterize the novel silanes structures.
应用气相色谱质谱和红外光谱表征了它们的分子结构。
Accurate position of mass spectrum peak was ascertained through mass calibration for instrument.
对仪器进行质量校正，以确定正确的质谱峰位置。
The compound structure is verified by melting point, IR, NMR, element analysis, mass spectrum and optical rotation.
所得最终产品经熔点、核磁、红外、元素分析、质谱和旋光度分析，证明与预期结构相符。
Second, aimed at the ionization and dissociation mass spectrum of trimethylamine.
针对三甲胺的电离解离质谱。
The results of mass spectrum analysis are discussed.
讨论了质谱分析结果。
METHODS Gas chromatography mass spectrum(GC MS) was employed to detect the concentration of 3 MCPD in the blood after ig.
方法采用毛细管气相色谱质谱（GCMS）联用法测定大鼠血液中3MCPD的含量。
IR spectra, mass spectrum and 1H NMR characterize it. Its surface tension, cmc, emulsification, moistening property, froth property and complex property are tested.
采用红外、质谱、核磁氢谱对正辛基聚葡萄糖苷进行了表征，并对其表面张力、临界胶束浓度、乳化性能、润湿性能、泡沫性能和复配性能进行了测试。
The method including the process of extraction chromatography and the mass spectrum measurement for the exact analysis of micro neptunium in the existence of large quantity of uranium is established.
建立了准确测定常量铀中微量镎的方法。方法包括萃取色层法分离和质谱法测量。
And if you have a liquid hot mass, it will produce something which we call a continuous spectrum.
如果是热的液态物质，将产生所谓的连续光谱。
Based on the sensing mechanism of Coriolis mass flowmeter and analyzing signal spectrum in actual working, the novel applied method is devised for phase difference detection.
基于科氏质量流量计的工作机理和实际工作情况下的信号频谱分析，提出了切实可行的相位差检测新方法。
The structure of objective product was confirmed by characterization with Fourier transform infrared spectrum (FTIR), nuclear magnetic resonance (1H NMR) and mass spectrometer (MS).
并通过傅里叶变换红外光谱（FTIR）、核磁共振谱图（1HNMR）以及质谱（MS）对产物进行了表征，确定了目标产物的结构。
The structure of the a-long-chain alkylbetaines was characterized by chemical analysis, element analysis, infrared spectrum, nuclear magnetic resonance and mass spectrometry.
采用化学分析、元素分析、红外光谱、核磁共振及质谱等方法对产品进行了表征。
There are obvious difference between the two 2D gels, but the different protein spots are not identified by mass spectrum, so the tumor special protein is not found.
肿瘤患者脑脊液和正常对照脑脊液双向电泳图谱有明显差别，但是本实验尚未对这些差异蛋白进行质谱鉴定，所以未找出肿瘤特异蛋白。
Constant conductance method USES partial pressure measurement technology, which has no strict request to outgassing rate of mass spectrum analysis chamber.
固定流导法采用的是分压力测量技术，对质谱分析室的漏放气率的指标要求不高。
Phase distributions of heavy metals in pyrite were analyzed by inductively coupled plasma mass spectrum with sequential extraction procedure.
以分级提取-电感耦合等离子体质谱考察了黄铁矿中重金属的相态分布。
The probability mass function of queueing delay, the autocorrelation and power spectrum of delay jitter for this periodic cell stream are derived.
得出了该路周期性信元流的排队时延分布、时延抖动的自相关函数和功率谱。
Thermal degradation of polystyrene was investigated with thermogravimetry-mass spectrum analysis (TG-MS).
采用热重质谱法研究了聚苯乙烯的热降解过程。
The highest concentration of mercury was found in the antennal glands by mass spectrum analysis.
质谱分析表明，触角腺中汞的含量最高。
By means of gas chromatography, mass spectrometry and IR spectrum, the product was confirmed to be trimethyl borate.
结果利用气相色谱、色谱-质谱联用、红外光谱等分析表征手段，鉴定反应产物确实是硼酸三甲酯。
A primary measurement of mass spectrum on Tokamak KT-5 is presented.
本文介绍了KT—5托卡马克装置质谱测量的初步结果。
With gas chromatographic and mass spectrum (GC-MS) analysis technology, the chemical composition of biomass tar and its distillations were analyzed.
主要采用色谱-质谱联机(GC - MS)成分分析法对生物质焦油及其馏分试样进行成分分析。
A number of data show that the he mass spectrum detection technique is the only way to meet the requirements of "no-stop" of the thermal power plants.
大量数据证明，氦质谱检漏技术是满足火力发电厂“不停机”的真空系统检测的唯一方法。
The fracture manner of PPO was obtained through analysing some fragment peaks of compounds in the second - order mass spectrum.
并在二级质谱中通过对一些化合物碎片峰的解析，得到了PPO的裂解方式。
We also present theexpressions for the excitation spectrum, lifetime, and effective mass of quasi-particles.
又根据量子多体理论，计算了准粒子的激发谱、寿命和有效质量。
Modern FH communication system need transmit a mass of data, traditional modulations are no longer suitable for high-speed data transmitting in FH system due to low spectrum efficiency.
现代跳频系统需要传输大量数据信息，传统调制方式由于频谱利用率低而不适合跳频系统的高速数据传输。
The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum, nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum.
通过红外光谱、核磁共振和负离子电喷雾质谱三种表征技术鉴定了原油中的石油酸结构和组成。
In the course of analyzing the full-scan mass spectrum, the compounds with molecular weight 548 and 396 are founded to be never reported.
在质谱全扫描图的分析过程中，发现了分子量分别为548和396的尚未见报道的成分。
In the course of analyzing the full-scan mass spectrum, the compounds with molecular weight 548 and 396 are founded to be never reported.
在质谱全扫描图的分析过程中，发现了分子量分别为548和396的尚未见报道的成分。
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