A microelectromechanical resonator with a vacuum-cavity is fabricated using polysilicon-enabled release methods. For any two words, a concept similarity computation unit obtains a concept similarity, which is an index indicating how close the concepts represented by the two words are. The invention also concerns a multivitamin-mineral drink containing an energy supplement of the composition described, dissolved in water. At least one front first fastening, one rear second fastening and one diagonal fastening are provided to fasten the seat part to the lower seat structure. The use of SPVS result allows back-end systems to distinguish which clock is the exact clock to sample the analog signal, and make the back-end convert quality is almost the same as the front-end.