The time-varying and incommutable character of the coefficient matrix of periodically time-varying linear systems are the bottleneck of the design for high precision direct integration methods.
Suffer the effect of the element such as relation of ground fringe politics, undercapitalize problem is the " bottleneck " of economy of Russia far east all the time.
For the plate tower, in revamp for capacity increase the downpipe of the plates generally becomes the bottleneck, and flooding of the downpipe is liable to occur.The DJ type plates h...