查询词典 methane

The effects of desorption time, permeability isothermal absorption curve shapes, pressure difference, oil and gas saturation on the degree of coalbed methane production are calculated and its producing mechanism is analyzed by simulation.

模拟计算了解吸时间、渗透率、等温吸附线形态、压差、含气饱和度等方面因素对煤层气产量高低的影响，分析了煤层气产出的机理。

Comparison between simulation results and experimental data shows that combination of simplified reaction dynamics and CFD can give an accurate simulation of traditional SNCR and SNCR process with methane additive.

模拟结果与实验结果的对比分析表明，采用简化的反应模型和CFD结合可以对常规SNCR反应和加入CH4的脱除NOx反应过程进行较为准确的模拟。

By analyzing and researching on methane concentration in the monitoring space of adjacent sensors, function relationship between interval, alert time, air flow velocity and section area of roadway is concluded while theory base and methods of sensor interval is put forward for relative safety criterion.

结果表明：巷道瓦斯平均浓度与风速、巷道截面积、瓦斯涌出强度、传感器间距之间存在一定的函数关系，矿井监控系统所需要的最短响应时间是目前迫切需要解决的问题。

The optimal coefficient of excess air was related to the mass flow rate of methane and wall temperature.

甲烷质量流量、壁面温度与最佳过量空气系数之间具有一定的变化关系。

But as industry booms on earth, greenhouse gases, like carbon dioxide and methane, are released into the air—and trap more and more of the sun's energy in, so the earth's temperature rises.

但是由于地球上工业的迅速发展，诸如二氧化碳和甲烷之类的温室气体被释放到空气中――从而又把越来越多的太阳能聚集回地球，地球温度因此而升高。

In the light of the complex, high-level and non-linear feature of the mathematical model which describe the transport of the coalbed methane, this paper study the fully-implicit solving method of the mathematical model in detail. Based on the complexity of the algebraic equations which are formed eventually, according to the alternating direction implicit difference pattern, this paper use the iterative method and the fully main element Gauss-Jordan eliminating method to solve equations, which is to use the iterative method to determine coefficient matrix and use the fully main element Gauss-Jordan method to solve th linear algebraic equation group, at the same time of studying the solving method of the mathematical model, according to the devising requirement of FORTRAN77 program structure, this paper draw up computer program and form the corresponding computer model, and verify the validity and reliability of the model in theory by operating the model.

重点研究了模型内、外边界及有关参数的处理，针对描述煤层甲烷运移的数学模型是一个复杂、高阶非线性数学模型的特点，详细研究了模型的全隐式求解方法，根据最后形成的代数方程组的复杂性，按交替方向隐式差分格式，采用迭代与全选主元高斯约当消去法相结合的方法求解方程：即确定系数矩阵采用迭代法，求解线性方程组时采用全选主元高斯约当消去法，在研究模型解法的同时按FORTRAN结构化程序设计的要求，编制计算机程序，形成相应的CBMRS计算机模型，并通过模型的运行从理论上证明了模型的正确性与可靠性。

Oxidation of methane increases the amount of OH and HO2 radicals which catalyse ammonia into amidogen and enhance the SNCR reaction at lower temperature.

在SNCR反应中加入CH4，其氧化反应使得OH和HO2等基元含量增加，激发了NH3形成NH2，在较低温度下促进了SNCR反应，减少了氨泄漏。

The composition of Jupiter is 75% hydrogen and 25% helium by mass, with traces of ammonia, water and methane.

木星的组成是75％，氢和氦25％的质量与氨，水和甲烷的痕迹。

The atmosphere they create has a combination of gases such as hydrogen, water, ammonia, methane, and carbon dioxide.

他们创造的大气是由诸如氢、水、氨、甲烷和二氧化碳混合而成的气体。

The droplet velocity and size distribution in the spray of diesel/dimethoxy methane blend was investigated using Phase Doppler Anemometry.

应用激光相位多普勒技术测量了含甲缩醛柴油喷雾的速度场和粒径场，在直喷式柴油机上研究了该含氧混合燃油的燃烧排放特性。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。