瓦斯

A new dynamic model for simulation of gas flow in fissured coal is established based on lattice Boltzmann method, and is used to simulate two-dimensional gas flow in fissured coal.

基于Lattice Boltzmann方法建立一个新的模拟裂隙煤体内瓦斯渗流的动力学模型，并利用该模型模拟二维裂隙煤体内瓦斯流动。

The third is how the emission amount is foreknown under the neural network and Genetic Algorithms. The data management of Gas and prediction system will be discussed.

论文在简单介绍神经网络和遗传算法的基本原理后，提出了神经网络和遗传算法的瓦斯涌出量预测方法，将神经网络和遗传算法应用于瓦斯涌出量预测问题。

This thesis keens on the DM utilizing research in coal mine gas forecasting. It is explained about domestic and outboard researching present conditions of time series data mining, time series analysis, formalized expression and model establishment of time series. Through analysising the features of coal mine gas observing data and several species of model. This thesis declares a suitable data and model ARMA.

本文的主要研究方向是时间序列数据建模及其在煤矿瓦斯预测中的应用研究，文中就时间序列数据建模的国内外研究现状、时间序列分析、形式化表示和时间序列的建模等进行了详细的论述，在分析了煤矿瓦斯监测数据的特点和多种模型的特征基础上，提出了本文所适用的数据模型为ARMA，同时，对特定的数据进行了数据建模，并对结果进行了分析和验证。

This device can simulate five kinds of coal and gas outburst experiments on coal beds with different obliquities, which are under the different gas pressures and geostresses.

2可实现5种不同倾角煤层在不同地应力、不同瓦斯压力下的煤与瓦斯突出模拟试验。

At present, most large mechanical-electric facilities of gas deflation and facilities of gas storage are overwatched by labor in our country. A little carelessness will lead to accidents; and the important parameters such as the gas thickness in the deflation pipeline and deflation flow capacity must be calculated termly by labor, which results in the inconvenience in administration.

我国目前大多数瓦斯抽放或加压泵房的大型机电设备和储气设施，都是靠人工昼夜看守，稍有疏忽，就会发生事故；抽放管道的瓦斯浓度，抽放流量等重要参数也只能定期进行人工测算，不便于管理。

According to the need for study on methane movement law in fully mechanizedsublevl caving stopes,the methane rising and pressure diffusion theory is put forward.

依研究综放采场瓦斯运移规律的需要，提出矿井瓦斯气体浮升与压强扩散理论。

In the paper,the alternative characters of current electric conduction of rock-coal porous medium with gas are studied.

开展煤岩多孔介质及其充瓦斯后电性质的研究，对煤与瓦斯动力灾害的有效预防及煤层气的勘探开发具有重要的意义。

In the process of draining gas in gob area of a coal mine, the stability of surface drilling well and gas drainage effect were improved by studying different factors affecting the drainage effect and the term of service with the method of numerical simulation of computational fluid dynamics and field test.

在应用地面钻井抽采矿井采空区瓦斯的过程中，为了提高地面钻孔的稳定性及瓦斯抽采效果，采用CFD数值模拟和考察试验的方法研究了影响地面钻孔抽采效果和服务期限的不同因素。

Mixed. On the pipeline to setting the wet water level controlled automatic fire barrier and the special

低浓度瓦斯输送工艺流程为抽放瓦斯与细水雾混合，在输送管路上

Purpose gas pipeline with metal ripple belt fire barrier. After dehydration, the gas enters the gas power

设置湿式水位自控阻火器和金属波纹带瓦斯管道专用阻火器，瓦斯脱水后

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。