气体浓度检测是在燃气、石油、化工、冶金等存在易燃、易爆、毒性气体的危险场所中广泛运用。用每立方米大气中污染物的质量数来表示的浓度叫质量-体积浓度，单位是毫克/立方米或克/立方米。
流程变量，例如流动率（flow rate）或是气体浓度（gas concentration）是透过输入模块进行监测。信息是由中央控制单元予以处理；而部份的动作则是由输出模块负责，例如驱动致动器等。
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红外线气体浓度感测器 infrared gas density meters
气体浓度鉴定器 gas tester
气体浓度测量仪 gas concentration measurement instrument
可燃气体浓度测定仪 explosimeter
气体浓度梯度 gas concentration gradient
温室气体浓度 Greenhouse Gas Concentration
气体浓度分数 [内科] fraction concentration of gas
有害气体浓度上限 allowable conecntration
气体浓度稀释器 Aerosol Diluters
The effects of testing temperature, gas concentration, doping and film thickness to the properties of MFeO3 thin films were deeply studied.
深入研究了测试温度、气体浓度、掺杂和膜厚对材料性能的影响。
参考来源 - MFeOThis algorithm could map gas concentration effectively in a two-dimensional plane.
2、利用双三次B样条曲面重构技术发展了一种快速算法,有效地重构出丙酮气体浓度在测量平面上的空间分布。
参考来源 - 大气环境中气体污染物空间浓度分布的重构The essential measurement formula and error formula of the technology are deduced and the application fields of this method are also discussed. Applying this technology, an CPLD-based SF6 gas thickness detector is invented.
从理论上对适于微量二元混合气体浓度的测量公式和误差公式进行了推导，讨论了此方法的适用范围；从工程上基于CPLD完成了SF_6气体浓度超标报警器的设计。
参考来源 - 基于超声技术的气体浓度检测仪设计·2,447,543篇论文数据，部分数据来源于NoteExpress
随着温室气体浓度的下降，地球开始再次变冷，最终又将回到冰河时代。
Gradually as the concentration of greenhouse gases goes down, Earth starts to cool again, and eventually you slip back into an Ice Age.
全球气候变暖是由于大气中吸热气体浓度增加所引起的；
The planet is warming due to increased concentrations of heat-trapping gases in our atmosphere;
这代表着大气的变暖，会比人们根据温室气体浓度水平去推想的速度要慢。
This means that the atmosphere will warm more slowly than a given level of greenhouse gas would lead you to expect.
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