瓦斯

Designs one kind of mine shaft portable gas detector in view of the present situation, when the gas gas density approaches the dangerous value, automatically sends out reports to the police, the reminder mine shaft personnel leaves immediately.

针对目前情况设计一种井下便携式瓦斯探测器，当瓦斯气体浓度接近危险值时，自动发出报警，提醒井下人员立刻离开。

Finally, it makes a discussion and draws a conclusion that the multiple regression model which is set up through selecting the complications of influencing gas emission with partial regression square sum parameter is feasible , at the same time, it plays a role in improving the accuracy of fitting prediction ,and it could be better for forecasting and controlling the gas emission in the coal mine.

最后，通过分析，得出结论：采用偏回归平方和参数对该矿瓦斯涌出量影响因素进行优选建立回归模型是可行的，同时有利于提高拟合精度，可以更好地对该矿瓦斯涌出量进行预报与控制。

A Piecewise Polynomial Representation based similarity search approach for time series data in coal well gas monitoring was proposed.

研究基于时间序列相似搜索技术的煤矿瓦斯涌出分析新途径，提出基于PPR的煤矿瓦斯监测数据相似搜索方法。

The coal and gas outburst conditions are mainly determined by gas pressure gradient and coal shear stress.

煤与瓦斯突出的条件是由煤基多孔介质中瓦斯压力梯度的大小和煤体固体骨架的抗剪强度大小所决定。

Produce the BF gas mud 100, OOOt every year. The raw mineral of puddling is the magnetite containing vanadium and titanium. The grade of iron is only 53%. The grade of sinter mineral is only 47-48%. So the percentage composition of iron is relatively low, only 29.70%. The grade of zinc is relatively high, reach 9.92%. And the percentage composition of carbon is relatively high, reach 16. 80%. In the next place, the BF gas mud is the production through sinter in high temperature.

攀钢炼铁的原矿物为钒钛磁铁矿，铁品位仅为53％，烧结矿品位为47％～48％，所以攀钢高炉瓦斯泥的铁品位也相对较低，仅为29.70％，并且含锌量高，达到了9.92％，含碳则高达16.80％；其次高炉瓦斯泥是高炉冶炼过程中的产物，SiO_2、Al_2O_3和铁部分熔融在一起，选矿难度增加。

Sludge of Pan Steel were firstly disposed by mineral seperation and then the mill tailings of sludge were reduced by pyrometallurgy process to reclaim zinc, and iron in the slag tails were reclaimed by magnetic seperation.

采用选-冶流程处理攀钢瓦斯泥，经选矿后的瓦斯泥尾矿采用火法冶炼回收其中的锌，火法处理后的尾渣经磁选回收铁。

Research and development of this project is a new quick-setting polymer drilling expansion agent, mainly used for determination of gas pressure sealing sealing boreholes, the quality can also be used for different conditions of pressure measurement of the coal seam gas drilling sealed.

本项目研发的是一种新型高分子速凝钻孔膨胀剂，主要用于封孔测定瓦斯压力钻孔的封孔，也可用于不同质条件下的煤层瓦斯压力测量钻孔密封。

The Russian troops fell back to Sevastopol, which marked the start of the siege.

苏联军队不得不退到塞瓦斯托波尔，这标志着围攻塞瓦斯托波尔要塞的开始。

The unique geographic location and navigation conditions of the city's harbors make Sevastopol a strategic important naval points.

塞瓦斯托波尔是始建于1783年（当时俄国吞并克里米亚半岛）根据皇后凯瑟琳二世于6月14日发出的法令，它独特的地理位置和优良的港口城市的通航条件，使塞瓦斯托波尔成为重要的战略军事重地。

The damage effects of gas explosion on the structures in excavation roadway is to study some factors such as the overpressure in the shock wave front, the action time of shock time, the position of structures, the shape and so on. Through the discussion above, the study about the damage mechanism and damage effects on ventilation system can be put into theory research and practice.

瓦斯爆炸对构筑物的破坏效应是通过对冲击波阵面上超压、冲击波的作用时间及构筑物所处的位置、构筑物的形状等因素的研究进行的，而瓦斯爆炸的破坏机理和对通风系统破坏效应方面的研究不但可以加深理论而且还可以应用于实践。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。