查询词典 methane

Based on data gained from in- site, ANSYS finite element analysis software is used, numerical value simulation was carried out in stress distribution、 mechanics property、 methane removal of coal body which is located in front of drivage face before and after taking hydraulic pressing measures.

以现场实测数据为基础，利用ANSYS有限元分析软件，对水力挤出措施实施前后的掘进工作面前方煤体应力分布、学性质、斯运移进行数值模拟，研究了水力挤出措施的消突机理。

This design on the main Nanshan coal mine methane drainage occurrence, the necessity and feasibility, drainage methods to determine the expected effect, as well as drainage, etc; and the elaboration of natsun mines in accordance with specific parameters on mine, some of the roadway and workface, drivage workface for gas drainage.

本设计主要对南山煤矿矿井瓦斯赋存情况、抽采的必要性及可行性、抽采方法的确定以及抽采效果的预计等进行相应的阐述；并根据南山煤矿的具体参数，对矿井的一些巷道及采煤工作面、掘进工作面进行瓦斯抽采。

The thermodynamic functions of NO removal by low carbon hydrocarbons such as methane, ethane, ethene, ethine, propane and propene are calculated,and enthalpy changes of reaction producing activated particles from low carbon hydrocarbons in electric field are calculated to find out the appropriate low carbon hydrocarbons for removing NO.

通过计算甲烷、乙烷、乙烯、乙炔、丙烷和丙烯等低碳烃与NO反应的热力学函数和低碳烃在电场作用下产生活性粒子的反应焓变，找出合适的低碳烃作为脱除NO的添加剂。

Artist's impression of the extrasolar planet HD 189733b, now known to have methane and water.

艺术家想象中的系外行星HD189733b，现在了解到，存在甲烷和水。

Ammonia and nitrate, ferrous ion, sulfide, various gases and organic acids are sequentially formed, corresponding to the activities of aerobic and facultatively anaerobic bacteria, sulfate-reducing bacteria, and methane-producing bacteria with the development of reduction reactions.

在还原过程中，随着好氧细菌、兼性厌氧细菌、硫酸还原菌和甲烷菌的活动，相继形成氨、硝酸根离子、亚铁离子、硫化物、气体物质及有机酸。

Deep coal mines are under the complex mining environment conditions of high in-situ pressure and geotherm, as well as high methane content in coalbed and pore pressure dissipation.

根据我国煤炭资源勘探开发中存在的问题与现状，在深层煤矿床赋存规律、开采地质条件及综合探测研究方面，急待解决的关键科学问题是：a。

Luliang Basin is of a series of good conditions of forming commercial biogenic methane gas reservoirs,such as the excellent type of kerogen,high organic matter abundance,low-salinity hydrochemical property,suit a ble geotherm,immature hydrocarbon source rocks and fair structural-lithological traps,etc.

极佳的生气母质类型与丰富的有机质、低矿化度水化学特征、地温适中、未成熟的烃源岩及良好的构造—岩性圈闭等因素，是形成陆良盆地工业性生物甲烷气藏的良好条件。

The alternative method of O-demethylation,methane sulfonic acid/DL-methionine and hydrobromic acid were investigated.

方法在以蒂巴因为原料，经氧化、氢化、酰化、氰化、去氧甲基、水解、N-烯丙基化得到纳洛酮的合成路线中，分别采用甲磺酸/DL-甲硫氨酸和氢溴酸代替三溴化硼进行去氧甲基化和后续水解反应。

Results The synthesis condition was improved. The method of methane sulfonic acid/DL-methionine was found an ideal substitute of BBr3 for less cost. While using hydrobromic acid, the O-demethylation and hydrolyzation could be combined in one stage.

结果 优化了纳洛酮的合成工艺，甲磺酸／DL-甲硫氨酸法试剂价格低廉，可降低生产成本；而氢溴酸法不但试剂价格更低，还可将去氧甲基化和水解合并为一步反应，使新工艺的总收率提高到59.90%，产品质量符合中国药典。

Research on hydrogeological conditions is relatively poor at present, though it is one of the critical factors influencing the accumulation of coalbed methane.

水文地质条件是影响煤层气富集成藏的重要因素之一，但是目前与之相关的研究却比较薄弱。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。