查询词典 noble gas

Some experiments have been done by simulating in-situ hydrate formation system by gas migrating in seepage system in a glass bubble cell.The phenomena in experiments indicate that gas migration can change the quality of mass and heat transfer of the interface between gas and liguid when hydrate is forming,and it's a moving process of equilibrium curve.There wil...

在鼓泡透明玻璃反应釜里模拟渗漏系统气体穿越多孔隙砂层形成水合物的过程实验，分析了气体迁移对气体水合物形成时气液界面的传质传热性质影响，表明实验中气体迁移形成水合物的过程是一种相平衡曲线动态移动的过程；在形成水合物的气—液界面存在具有一定厚度的过渡层，只要过渡层内气体达到饱和即可形成水合物；气体在迁移中不断形成水合物并在孔隙中形成过压，导致地层骨架的力学破裂和失稳；必须建立一个新的水合物相图以适应气体迁移形成水合物过程的这种新特性。

Gas flow from borehole directly relates to the gas emission from drill drainage coal bed and judging the initial velocity of gas emission from the borehole .

钻孔瓦斯流量直接关系着钻孔抽放煤层瓦斯涌出量及钻孔瓦斯涌出初速度的判定，因此研究钻孔瓦斯流量的变化及发展趋势具有较大实用价值。

The method of drilling by the wind coal drill ,the coal body produces the crack and releases gas under the conditions of the dynamic pressure function of mining field,then draining gas with drainage facility to govern the local high gas region at working surface are introduced.

介绍了利用风煤钻施工钻孔，在采场动压作用下煤体产生裂隙释放瓦斯，然后利用抽排设施抽放瓦斯，治理采面局部高瓦斯区域的方法。

The computational results indicate that surface catalytic combustion restrains gas phase combustion. Inlet velocity and tube diameters have important influence on catalytic combustion of hydrogen. For smaller inlet velocities,reaction is dominated by gas phase combustion. As the inlet velocity increases,there exist both surface catalytic combustion and gas phase combustion. For bigger inlet velocities,reaction is dominated by surface catalytic combustion. The temperature of flame core decreases with the decrease of tube diameter.

计算结果表明，表面催化反应对空间气相反应有抑制作用；入口速度和管径对氢气的催化燃烧过程有重要的影响，在入口速度较小时，燃烧主要是空间气相化学反应，随着入口速度的增大，燃烧过程同时存在着表面催化反应和空间气相反应两种控制因素，在入口速度较大时，燃烧主要是表面催化燃烧过程；随着管径的减小，微型管道内反应的最高温度降低。

Research on water hammer with gas in pressure conduit system Through physical experiments, researches on pressure conduit system with gas releasing and liquid column separating, which consist of observing flow patterns, testing the conditions under which liquid column separation brings into existence and the water hammer in water interception collision, and studying effects resulting from gas content and different water velocities in pipeline, was done.

输水管道系统中含气水锤研究通过物理试验，对有压输水管道系统中的气体释放与液柱分离进行了研究，观察其流态、测试液柱分离发生的条件及断流弥合水锤压力，研究了含气量、流速等参数对液柱分离的影响。

Here's the basic difference: when the planets in our solar system first formed, they were swimming through a disk-shaped cloud of gas. Their passage roiled and compressed the gas, and the gravity of the compressed gas in turn pulled on the proto-planets.

根本的差别在于：当行星在太阳系中首次形成时，它们正漂浮着通过一片圆盘状的气体云，于是它们前进的道路受到波动同时也压缩了气体，被压缩气体的引力反过来拉住了这些初生的行星。

On water drainage technology, the paper has analysed the mechanism and gas process; introduced the gas theory of gas apparatus; raised the critical condition of water drainage and liquid level calculation of wellbore;the paper alse raised the sand control technology and parameter calculation.

在排水采气工艺方面，对排水采气机理以及采气过程进行分析；简单介绍了几种常见采气设备的采气原理；提出了排水采气工艺连续性的临界条件的合理的计算方法；为了取得最佳的排水采气量，提出了井筒液面的计算方法；提出了气井的防砂工艺、工艺参数设计方法以及相应的计算框图。

Reduction in the amount of flue gas and fuel due to higher boiler thermal efficiency under oxygen-rich atmosphere results in dust decrease in the exhaust gas, which makes it possible to improve flue gas velocity for utility boilers.

富氧气氛下由于烟气量的减少以及锅炉热效率提高所带来的燃料量的减少使得烟气中的粉尘量得到一定的降低，为电站锅炉水平烟道烟气流速的提高带来了可能。

The experiments for determining the reaction kinetics of Daqing atmospheric residue were performed in a continuous flow, expanded bed rector. Four-lumped reaction kinetic model was developed to account for various feed and product fractions of Daqing atmospheric residue (gases, gas oil, residue and coke). The amounts of olefins and alkyls in the gas products were further analyzed to determine reaction kinetics of gas product distributions. Hence, a combined five-lumped reaction kinetic model was obtained for catalytic pyrolysis of Daqing atmospheric residue. The kinetic constants both in four-lump model and five-lump model were evaluated. A simulator for catalytic pyrolysis process was developed by incorporating the five-lumped kinetic model into the hydrodynamic flow model.

其次利用改进的固定流化床装置考察大庆常压渣油催化裂解反应规律，筛选反应工艺参数；分析了催化裂解工艺存在的主要化学反应类型，提出了渣油一次反应和二次反应网络图；将反应原料油作为单独集总组分，而将产品中的轻质油、气体、焦炭分别作为集总，从而建立了四集总动力学模型；在此基础上，把气体产物中的目的产物低碳烯烃独立划分，得到五集总动力学模型；采用最小二乘法分析实验数据，分别得到四集总动力学模型和五集总动力学模型中各集总间相互反应转化的反应速率常数。

Based on the briquets of the outburst coal seam of typical coal and gas outburst mine of Datong in Songzao Coal and Electricity Company, by means of self-developed triaxial gas-seepage experimental device, the experimental research of permeability of gas-bearing briquets in the complete stress-strain process is performed.

利用典型煤与瓦斯突出矿井松藻煤电集团打通一矿突出煤层原煤制备型煤试件，应用自行研制的含瓦斯煤样三轴瓦斯渗流试验装置，进行含瓦斯型煤试件的全应力－应变过程瓦斯渗透特性变化规律的试验研究。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。