A novel type of aromatic poly(ether ether ketone)s with carboxyl groups were prepared by polycondensation of 4,4-bis(4-hydroxyphenyl)pentanoic acid with difluor
A tightly-coupled GPS(global positioning system)/SINS(strap-down inertial navigation system)based on a GMDH(group method of data handling)neural network was presented to solve the problem of degraded
Constructing a qualitative model for discrete rods warhead,the kinematics analysis and dynamics analysis of the rods are completed.On the basis of the qualitati