?????????????????? (2019)
Journal Article
Liu, F., Hu, Z., Tang, Y., & Xie, J. (2019). ??????????????????. Kexue Jishu yu Gongcheng, 19(33), 342-349

In order to solve the problem that the traditional method is very complex in safety assessment of primary and secondary school, which cannot get an objective result quickly. The method of calculating the natural visibility ratio within the students'... Read More about ??????????????????.