The applicationofindustrialultrasonicphasedarraydetectionis still in the introductory stage in China. Thekeytechnologyis researchedandresolvingscheme is put forward in the paper.
This sets the stage for overpaying for college because while you may have an introductory rate of 0%, that will quickly come to an end, and you may well end up spending a lot more than if you had used other options like student loans, Pell grants or TAP.