For studying characteristics of urban vehicular pollution so as to suggest the optimal control target for policy making, a mathematical optimizing model was developed.

为研究城市机动车污染特征，实现污染物排放的最优控制，提出研究排放控制目标的数学优化模型。

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The dispersion characteristics of vehicular pollutant within street canyon were analyzed by using the method of numerical calculation.

通过数值计算的方法分析了城市街道峡谷内机动车排气污染物的扩散特性。

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A new measuring instrument used for detecting the photometric characteristics of motor vehicular lamp is introduced.

介绍一种能够对车灯光度、色度性能同时进行在组测试的计量仪器。

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