Each relationship phrase and role pair must belong to a relationship type. Each relationship type can have one or more relationship phrase and role pairs.For example, the pair is defined so that Organization is the subject type, Employer Of is the subject phrase, Employer is the subject role,...
Engineering, Xinjiang University, Urumqi 830017, China * Correspondence: wangxiaojing345@163.com Abstract: With the realization of the "dual carbon" goal, urban public transport with an increasing proportion of new energy vehicles will become the key subject to achieve the carbon emission reduction ...