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1)  Correlation between CH4 and CO concentrations
CH4/CO相关性
2)  CO/CH4 gas sensors
CO/CH4气敏元件
3)  CH_4
CH4
1.
Batch incubation experiments in aid of anaerobic incubation flask were conducted to study the anaerobic degradation and volatilization of hexachlorobenzene(HCB),the change of pH in soil,the emission of CH_4 and CO_2,and the volatilization of HCB in the Hydragric Acrisol and Gleyi-Stagnic Anthrosol added with acetic acid,glucose and citric acid.
结果表明,8周内红壤性水稻土中HCB减少了约20%~44%,加入乙酸抑制HCB的降解,表明低pH条件不利于脱氯反应,加入葡萄糖和柠檬酸在前期抑制后期则促进HCB的降解;乌栅土中HCB减少了约21%~23%,加入小分子有机质对其降解没有明显的效果;六氯苯降解的主要产物为五氯苯(PCB),最终检测到红壤性水稻土中PCB为23~96μg/kg,乌栅土中为64~92μg/kg;HCB的降解与CH4和CO2的释放量在统计学上没有显著的相关性;2种土壤中,外加小分子有机碳均减少了HCB的挥发作用,且红壤性水稻土中HCB的挥发比乌栅土中更强,表明土壤有机质是影响HCB挥发的重要因子。
2.
The effects of the oxides of Mg and Ce on the CO_2 reforming of CH_4 over Ni/nano-Al_2O_3 catalysts were investigated.
考察了助剂Mg、Ce修饰的纳米A l2O3负载N i催化剂对CH4、CO2重整反应制合成气的反应性能影响,采用正交实验筛选催化剂。
4)  methane [英]['mi:θeɪn]  [美]['mɛθen]
CH4
1.
Coal mine gas at the ventilation outlet of coal mines can hardly be made use due to its low concentration of methane,which is usually emitted to the atmosphere and cause pollution and loss of energy.
煤矿通风口处瓦斯气的CH4浓度太低无法回收利用,只能排往大气中,既浪费能源,又污染环境。
2.
Utilizing the data of the greenhouse gases(GHGs) of atmosphere from 1991 to 2004 provided by NOAA Earth System Research Laboratory,including carbon dioxide and methane data at Korea of Tae-ahn Peninsula,Mongolia of Ulaan Uul and China of Waliguan stations,the atmospheric concentrations and their trends of GHGs in East Asia in 14 years were analyzed.
利用NOAA Earth System Research Laboratory提供的1991─2004年Tae-ahn(韩国),Ulaan Uul(蒙古)以及瓦里关(中国)的大气温室气体CO2和CH4的数据,对东亚地区大气温室气体的浓度特征及变化趋势进行研究。
3.
The diffusion of methane and carbon dioxide in a-MCMB prepared by the authors, was investigated by using the intelligent gravimetric analyzer apparatus (IGA-003, HIDEN) at 298 K and 258 K.
采用高精度的重力分析仪(IGA003,HIDEN)对天然气主要成分CH4和CO2杂质在活性炭微球材料内的扩散性质进行了研究。
5)  CH 4
CH4
1.
The mechanisms of the reaction NH 2+CH 4NH 3+CH 3, NH 2+CH 4CH 3NH 2+H have been studied at B3LYP/6-311G * level of density functional theory.
在密度泛函理论 B3LYP/6 -31 1 G*水平下 ,研究了 NH2 与 CH4的反应机理 。
2.
The reaction of CH 4+MgO→Mg+CH 3OH has been studied on a singlet state potential energy curve at B3LYP/6-311+G (2d,2p) level.
在B3LYP/ 6 311+G(2d ,2p)水平上计算了MgO +CH4 →Mg +CH3 OH反应的单态势能曲线 。
3.
The separation of CH 4 /N 2 gas mixture for improve the concentration of CH 4 by pressure swing adsorption (PSA) is studied.
采用变压吸附技术进行CH4 /N2 气体混合物的分离研究 ,以提高混合气中CH4 的浓度 。
6)  dependence relationship
相关性关系
补充资料:相关成本与非相关成本(relevantcostandirrelevantcost)
  成本按其发生是否与决策项目相关的分类。相关成本是指与制定决策方案有关的联影响的成本,例如当期是否接受一批订货,生产该批订货需要花费的各种成本,即为相关成本。如该批订货是一种特殊订货,即其价格低于以前生产这种产品的完全成本时,其相关成本就是生产该批产品的变动成本。如果生产该批订货需扩大生产能力时,相关成本就既包括生产的变动成本,还包括添置设备等所需的其他成本。机会成本、差量成本、现金支出成本、可避免成本等均属相关成本。

  非相关成本是指与制定决策方案并无影响的成本,因而在决策时可不予考虑。命名如接受特殊订货时,原有固定成本就属于非相关成本,因为即使不接受这批特殊订货,这些固定成本也会照样发生,当有几种方案可供选择时,各种方案都需发生的成本就是非相关成本,如采用不同的生产工艺组织生产时,构成产品实体的原材料在各种生产工艺过程中都要发生,所以这些原材料成本便是非相关成本。不可避免成本、沉落成本等属于不相关成本。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条