Characterising bicycle types

This work proposes to differentiate bicycles to provide a clear language for further research. It introduces differentiation by wheel count as a distinguishing variable. The seven types of cycles aim to capture all cycles with 4 or fewer wheels, and further differentiation is provided especially in the crowded 2-wheeled category.本研究提出针对自行车开展分类细化研究，以期为后续相关研究提供清晰的学术表述体系。该研究引入以车轮数量作为区分变量的分类逻辑，设定的7类骑行载具旨在覆盖所有车轮数不超过4的各类骑行装置，并尤其针对品类繁杂的两轮车类别开展了进一步细分。