助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[408]条 当前为第61条到80条[由于搜索限制,当前仅支持显示前5页数据]
 

相关语句
methane
    Analysis on Abnormal Methane Emission in Tailgate of Coal Face in Kangjiatan Mine
    康家滩矿回采工作面尾巷瓦斯异常涌出分析
    Experiment study on synthetic cure of methane in II824~(-2) fully mechanized mining with top coal caving face
    Ⅱ824~(-2)综放工作面瓦斯综合治理试验研究
    Nonlinear correction of methane sensor based on improved BP neural network
    基于改进型BP神经网络的瓦斯传感器的非线性校正
    Study on Method of Measure Methane Pressure in Water-rich Coal and Rock Seams
    关于富水煤岩层瓦斯压力测定方法的研究
    Elementary Analysis of Surface Borehole Stability in Gob Area Methane Drainage
    地面采空区瓦斯抽放钻孔稳定性分析
    Application Study on Methane Predicting Technology for Fully Mechanized Winning Faces of Pingdingshan Coal Mining District
    综掘工作面瓦斯预测技术在平顶山矿区的应用研究
    Study on CDM Application in Ventilation Air Methane Generation of Chinese Coalmines
    我国煤矿风排瓦斯发电的CDM应用研究
    Study on the Distribution Law of Methane Concentration in Mining Fissure Elliptic Paraboloid Zone
    采动裂隙椭抛带中瓦斯浓度分布规律研究
    Enhance one-hole-many-using technology study and implement coal mine methane management safely and efficiently
    加强一井多用技术研究 实现瓦斯安全高效治理
    As can be seen from effects of gas drainage from surface gas drainage well, Methane pressure has dropped from 4.5MPa to 0.6MPa, and coefficient of penetrating 1820 times the primitive, methane can be drainaged from surface well for longe time efficiently on the condition of mining protecting strata.
    下保护层采动影响下,被保护层瓦斯压力由原始4.5MPa,降低到0.6MPa,煤层透气性系数变为采动前原始透气性系数的1820倍,被保护层得到了充分卸压。
    This paper gives an overview of current developments in the area of fiber optic methane sensors.
    本文综述了光纤瓦斯气体传感器领域的近期发展。
    with the increase of water content, the permeability of coal for methane is increasing.
    含水煤样的渗透率明显低于干煤样的渗透率,随着含水量的增加,煤样瓦斯的渗透率减小。
    with the increase of water content,the permeability of coal for methane is increasing.
    含水煤样的渗透率明显低于干煤样的渗透率,随着含水量的增加,煤样瓦斯的渗透率减小。
    Through analysis on subjects affecting stability and measuring accuracy of methane sensor, the author pointed out the approach to improve sensor stability and reliability from the point of view of instrument type selection, parameter debugging, maintenance and checking method.
    通过对影响瓦斯传感器稳定性及测量精度原因分析,提出了从仪器选型、参数调试、维护保养、校验方法等几个方面提高传感器的稳定性和安全可靠性的途径
    This paper analyses detection principle of mine methane by use of a variable current detector, a new variable current detector circuit is designed.
    分析了矿井瓦斯变流检测原理,设计出一种新型的瓦斯变流检测电路。
    Given the severe methane disaster situation in China' s coal mines, the reasons of the disasters are anaylzed with safety science & technology and management science, and the instancy and necessity of strengthening basie research on safety science is also put fonvard.
    结合我国煤矿瓦斯灾害的严峻现状,从安全科学技术与安全管理的角度分析了煤矿瓦斯灾害多发的原因,提出了今后加强安全科学基础研究的迫切性和必要性。
    Methane monitoring system is very important in gas management in which Xingtai Coal Mine has done a lot.
    瓦斯监测系统是煤矿瓦斯管理的重要手段 ,同时也可用于防治矿井胶带运输系统外因火灾 ,从而大大提高矿井的防灾抗灾水平。
    The CH 4 in methane is oxygenated to CO 2 and H 2O(no poison and no explosive danger) by heating in lab. The concentration of gas is under explosive concentration ( volume concentration of methane is between 1%~5%) and flux is about 30 L/min.
    在实验条件下通过绝热氧化使瓦斯气体中的CH4 在爆炸浓度以下 (体积浓度 1%~ 5 % ) ,流量在 2 5~ 90L/min时氧化成无毒、无爆炸危险的CO2 和H2 O ,净化了瓦斯气体 .
    Optic fiber methane gas sensors which are used to measure the concentration of methane have a wide application prospect in mining, chemical, oil and many other industries, especially in hazardous and hostile environments.
    用于检测瓦斯气体浓度的光纤瓦斯气体传感器在采矿、化工、石油等工业中 ,尤其在恶劣和危险的环境中 ,具有广阔的应用前景。
    For the methane problems of mining coal seams, this paper perfects the related theories through studying mining multiple upper protective layers.
    基于煤与瓦斯突出的煤层群开采所遇到的瓦斯问题,针对煤层群开采的特点,通过多参数的考察,对多重上保护层开采进行了试验研究,完善了保护层开采的基本理论;
 

首页上一页12345下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社