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A dynamic friction model which can be used in the aircraft anti-skid braking system is introduced. On one hand, this model has similiar steady-state characteristics compared with the static friction model, on the other hand, it captures transient characteristics of the tire and the runway in emergency braking control. Dynamics and characteristics of the tire and the runway are analyzed, the PID+PBM...
The paper applies Grey correlation to analyze the correlation of the factors and the logistics of Qinhuangdao port through selecting the influencing factors in Qinhuangdao port, and then sequences the factors and finds the main factor to provide further guidelines for the sustainable development of Qinhuangdao Port.
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