Methane concentration measurement is the paper’s purpose. Fiber methane gas sensing technique is studied based on the principle of near infrared absorption.
论文以甲烷浓度检测为目的,进行基于近红外吸收原理的光纤甲烷气体传感技术的研究。
参考来源 - 基于近红外吸收原理的甲烷浓度检测研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The methane concentration nearly doubled, for example, between the peak of the penultimate glacial period and the following interglacial period.
例如，在倒数第二个冰期的高峰和接下来的间冰期之间，甲烷浓度几乎增加了一倍。
The variation of methane concentration gradient was greater.
甲烷浓度的梯度变化比较大。
The tendency of diamond texture change was studied on the condition of various methane concentration.
研究了不同的甲烷浓度对金刚石织构变化趋势的影响。
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