Dataset CARS

The emissions (16 chemicals, columns, C1 to C16) of 10 cars (Rows, 5 cars non catalyzed, R1 to R5, 5 catalyzed, R6 to R10) were measured in the three cycles (urban, extra-urban, combined, U E M). Repetitions were made with two different gasolines, U1 E1 M1 and U2 E2 M2, so that there are actually four ways, but cycles and gasolines have been joined in the tube factor.本数据集针对10辆汽车开展排放检测，共测定16种化学物质的排放水平，对应16个数据列，记为C1至C16。样本共10行，其中5行对应无催化转化器车辆（编号R1至R5），剩余5行对应装有催化转化器的车辆（编号R6至R10）。检测在三类驾驶工况循环下进行：城市工况（urban，缩写U）、市郊工况（extra-urban，缩写E）与综合工况（combined，缩写M）。本次试验采用两种不同汽油（分别标记为U1 E1 M1与U2 E2 M2）开展重复测试，理论上可形成四组测试组合，但研究中将工况循环与汽油因子合并至管因子（tube factor）中。