摘要用氧气体积分数法划分低瓦斯采空区自燃“三带”是目前在工程实践中应用最为广泛，也是最有效的方法。
Abstract: the oxygen concentration method is the most effective and most commonly used method in dividing spontaneous combustion "three zone" in low-gas goaf in engineering practice at present.
测试表明，甲醇体积分数10％-15％的甲醇汽油各项性能与一般车用无铅汽油相当，可使汽油研究法辛烷值提高1．5-3．5个单位；
Most of the performances of methanol gasoline of 10%-15% ( volume fraction) methanol are nearly the same as those of unleaded motor gasoline and the RON is 1.5-3.5 higher.
基于小角X射线散射理论，利用逐级切线法和材料分形理论中的散射强度法，分别计算PAN基炭纤维内微孔大小、体积分数及微孔表面分形维数。
Based on SAXS theory and fractal theory, we obtain the calculating method and calculating formulas of the pore size, pore volume percentage and the fractal of pore surface in PAN - based carbon fiber.
通过正交试验法探讨了提取工艺的最佳条件，分别考察了乙醇体积分数、超声时间和固液比3个因素对槲寄生中总黄酮提取率的影响。
Orthogonal test was used to evaluate the influence of the 3 factors, including the concentration of ethanol, the extracting time by ultrasonic, and the rate of solid and liquid.
随固相体积分数的增加，水基凝胶注模法坯体密度逐渐增加，但强度逐渐降低。
With increasing solid loading, density of AGC green body increases gradually, but strength decreases gradually.
随固相体积分数的增加，水基凝胶注模法坯体密度逐渐增加，但强度逐渐降低。
With increasing solid loading, density of AGC green body increases gradually, but strength decreases gradually.
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