The shaft crack is tonic shower cap one of the main serious malfunctions that often occur in rotating machinery.However, it is difficult to locate the crack and determine the depth of the crack.In this paper, the acoustic emission (AE) signal and vibration response are used to diagnose the crack.The wavelet transform is applied to AE signal to deco
The purpose of this paper is two-fold.One is to clarify the concept of gravity in international trade flows.The other is to measure the strength of gravity in international trade flows in a way that is consistent with a well-defined concept of gravity.This paper shows that the widely accepted belief that specialization is the source of gravity is n
We tonic shower cap propose and theoretically investigate an all-dielectric bowtie whisperinggallery-mode (WGM) resonator which consists of two tip-to-tip coupled semiconductor nanorings with triangular cross section separated by low refractive index material gap.Mode splitting of symmetric WGM and antisymmetric WGM is observed and analyzed.Due to