依据相关理论，对国内铁路车辆行业的特征、营销环境、市场需求、购买者行为以及行业内竞争态势进行了分析。
Basing on these theory, the paper analyses characteristic, marketing environment, market demand, buyer behavior, and competition situation of domestic railway rolling-stock manufacture industry.
依据认知心理学的有关理论，顺应短时记忆的特点，并运用与此相关的教学策略，可以有效提高课堂信息加工的效率。
According to the theory of cognition psychology and the characteristics of short-time memory, we can use some teaching tactics to improve the efficiency of classroom information process.
主要依据负压波方法，应用相关分析法理论对输油管道进行泄漏检测和定位。
This paper USES theory of correlation analytic method to detect and locate the leakage of oil conveying according to the negative press wave method.
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