Mine water disaster is one of the main factors which affects and threatens the safety and high-activity yield of coal mine in China.

矿井水害是影响和威胁中国煤矿安全、高效生产的主要因素之一。

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The algorithm was applied to estimating the model parameters of coal yield prediction by using its global optimization performance, and a high precision model was founded.

利用遗传算法的全局寻优特点，将它应用于模型参数估计，建立了精度更高的煤炭产量预测模型。

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The varying law of the final volatile yield of 18 different coal types was studied at different heating rates by thermobalance.

采用热天平在不同的升温速率下对18种煤的最终挥发分产量的变化规律进行了研究。

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The dividend yield of Arch Coal Inc stocks is 3.42%.

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Shell's gasification technique consists of partially combusting pulverized coal to yield carbon monoxide and hydrogen gas, which combine to form synthetic natural gas.

FORBES: Companies, People, Ideas

There is the further issue of the quality of coal, since the majority of the world reserve is of lower thermal quality than the top-grade anthracitic coal, and will yield less energy per tonne either burned directly or in the form of syngas in ICGC plants.

FORBES: 'Clean Coal' Project Falters In U.K.