The integrated degree is not high. The database conformability is bad, coefficientofutilization is low .
但是，系统往往单项开发比较多，集成化程度不高；
2
The computation of oxygen transfer rate and the coefficientofutilization of oxygen and respiratory quotient is given.
给出氧传递速率、氧利用率、呼吸商等参数的计算式。
3
With the tested result of natural ventilation system in an office building in Shanghai, analyses the irrationality of using the energy utilizationcoefficient to evaluate natural ventilation.