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 methane concentration has less effect on pressure loss.
乏风甲烷浓度对压强损失影响较小；
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。
The mathematical model of gas concentration harmonic measurement is built up. The result of methane concentration is also shown.
建立了谐波检测的数学模型，给出了甲烷气体的测量结果。
The methane concentration is increasing at 1% per year, which affects not only climate change but OH, O_3 concentration change in atmosphere.
甲烷在大气中的浓度以每年1%的速度增长，其不仅影响气候的变化，而且引起大气中OH，O_3等浓度的变化，是非常重要的化学物种。
The software is not only used to detect the methane concentration, but also to detect other gas concentration under a little parameter change.
软件不仅运用于甲烷气体浓度的检测，稍加修改各参数，也可以检测其它气体的浓度。
The internal stress in diamond thin films deposited by DC plasma CVD was studied as a function of methane concentration and deposited temperature.
研究了直流等离子体化学汽相沉积（CVD）法合成的金刚石膜内应力随甲烷浓度、沉积温度的变化关系。
Therefore, it is very important to measure the distribution of methane concentration during construction and operation of subway tunnel in real-time.
实时准确地检测地铁隧道施工及运营期间的瓦斯浓度对保障安全生产具有十分重要的意义。
Methane concentration measurement is the paper's purpose. Fiber methane gas sensing technique is studied based on the principle of spectrum absorption.
论文以甲烷气体检测为目的，进行基于光谱吸收原理的光纤甲烷气体传感技术的研究。
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。
The relations between the maximum explosion pressure, the maximum quantity of draw-off heat and coal dust concentration, methane concentration were calculated.
分别推导出粉尘爆炸放热量和最大爆炸压力与煤尘浓度、甲烷浓度等影响因素的关系。
By enhancing the wind speed, the higher concentration methane can move to deeper goaf, which can reduce the methane concentration in working face and top corner.
增加风速，可以使采空区内高浓度瓦斯向深部推移，从而降低工作面及上隅角瓦斯浓度。
It was shown that, internal stress of nano-diamond films increased with increasing methane concentration, higher substrate temperature and longer deposition time.
结果表明，随着甲烷浓度的升高、衬底温度的升高以及沉积时间的延长，金刚石涂层中的压应力增大。
The result shows that the buoyant law of methane close to coal wall and the distributions of methane concentration by calculating are in accordance with that from experiment.
通过数值计算得出的煤壁瓦斯上浮和浓度趋势与实验结果一致。
For instance in one study, the technique was used to take repeated measurements of methane concentration every 10 minutes directly above the height of the 18 cattle in the paddock.
例如，其中一项研究就是应用新技术每10分钟测一次小牧场里的18头牛头顶的甲烷浓度。
However, the final nucleus density obtained on gradually increasing the methane concentration from 0.6% to 1.2% is smaller than that deposited at a methane concentration of 1.2%.
但是甲烷浓度由0.6%逐渐增加到1.2%时，所得最终形核密度比一开始就将甲烷浓度设为1.2%的形核密度低。
Methane explosion accidents occur frequently, and accurate and real-time detection and early warning of methane concentration are the effective means of preventing these accidents.
瓦斯爆炸事故频繁发生，对瓦斯浓度进行准确、实时检测和预警是治理瓦斯危害的有效手段。
Now, the typical pattern for an interglacial period—and we've studied several—is that the concentration of carbon dioxide and methane gas actually reaches its peak.
现在，我们已经研究过几个间冰期的典型模式，其中一种是大气中二氧化碳和甲烷含量达到峰值的情况。
As for WASP-12b, however, there was more than twice the concentration of carbon as usual and almost 100 times more methane than expected.
不过，WASP - 12b的碳浓度要比通常情况高出一倍多，而且甲烷的浓度几乎是预计的100倍。
Methane as an important green house gas, its concentration in the global troposphere is increasing.
甲烷作为重要的温室气体，它在大气中的浓度正在增加。
This instrument is used with the principle of catalytic incineration to measure the concentration of methane in coal mine.
该仪器主要用于检测煤矿井下环境气体中的甲烷浓度，运用了热催化原理。
The IR-absorbing methane detecting instrument is designed by converting IR radiation to voltage signal, so the gas concentration is calculated.
该检测仪将红外辐射强度转化为电压信号，实现对甲烷浓度的测量。
The optical measurement method can not only be used to accurately measure the concentration of methane gas, but also be safe and reliable.
采用光学测量方法，不仅能精确测量甲烷气体浓度，而且安全可靠。
The system can simultaneously monitor the concentration of methane, carbon monoxide and other dangerous gases and temperature and humidity in the coal mine.
系统能够同时对井下气体中甲烷、一氧化碳等多种危险气体的浓度和井下的温度、湿度等进行检测。
IR technique is one of the most active areas that researches into the real-time detection of the concentration of Methane.
利用红外技术实现煤矿瓦斯浓度的实时检测是目前比较活跃的研究领域之一。
This paper introduces a method of measure analysis of methane-air premixed combustion flame component and concentration, and divides reactive, productive and environmental areas of flame.
本文介绍一种测量分析甲烷-空气预混燃烧火焰成份及其浓度的方法，并划分出火焰的反应区、产物区和环境区。
Sihe mine is endowed with rich coal bed methane resources. The concentration of recovered underground gas is high, and the gas can be utilized for many purposes.
晋城寺河煤矿煤层气资源丰富，井下抽采煤层气的浓度高，可作为多种用途。
These measures include improvement of oxidation ceramics and heat insulator, mixing high concentration methane and controlling air input.
具体措施包括：氧化陶瓷的改进、保温材料的改进、掺混高浓度瓦斯、控制进气量。
It considers that the main factor which influences high concentration of methane in this area is the tectonic controlling effect.
认为造成本区甲烷含量高的主要因素是构造控气作用。
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