Firstly, market structure analysis is made on the degree of market concentration, produce difference and barriers to entry and exit of Pengzhou garlic industry.
主要从市场集中度、产品差别化和进入壁垒三个方面对大蒜产业的市场结构进行了分析，认为彭州大蒜产业是垄断竞争的市场。
The influence of inlet area and diameter of exit tube on particle concentration distribution is also investigated.
改变分离器入口面积及排气管下口直径对分离空间内颗粒浓度分布的影响规律是不同的。
The results illustrate that primary air ratio has a major effect on pulverized coal ignition and minor effects on gas temperature, oxygen concentration and unburned carbon at furnace exit.
结果表明：一次风率对煤粉气流的着火影响较大，而对出口处烟气温度、氧量以及飞灰含碳量影响较小。
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