For those who spend most of their time working indoors, the indoor air quality (IAQ) could affect their working efficiency and health. This paper presents an intelligent proportional-integral-derivative (PID) controller for IAQ control. Different the

室内定位信号传播模型的对比，比较各模型在拟合信号传播过程的优劣。已验证，很实用。-Indoor positioning signal propagation model, the model of the pros and cons and the degree of fitting contrast. Verified, very useful.