说明：  汽车滚动阻力系数f值的大小，标志着汽车行驶中滚动阻力的大小。基于试车道路滑行试验数据，采用滑行试验法计算汽车的滚动阻力系数。分析过程通过matlab编程实现。
(the size of Car rolling resistance coefficient f value marks the size of the car driving rolling resistance. Based on the test data of the car road gliding, the rolling resistance coefficient of the vehicle was calculated by gliding test. The analysis is pocessed by matlab programming.)