The baseline signal in structural inspection based on guided waves is difficult to be obtained under varying environmental conditions.To guarantee the precision of damage identification, developing baseline-free damage detection methods is significant in practical crb concept structural monitoring work.Conventional instantaneous baseline measuremen
Association between cerebral electric swingarm lenses blood flow and higher nervous activity in people at different stages of adaptation to the midlands was studied.Investigation were performed before, during and after a three-week stay in the mountains at an altitude of 2100 m, as well as during short-term ups without the physical load on the heig
Diffraction methods are commonly used for the determination of the elastic lattice deformation and distortion from the displacement and broadening of gummy alligators the diffraction peak.These methods enable researchers to measure stresses and elastic properties of polycrystalline materials.The main advantages of diffraction methods are their non-
This paper derives the statistical properties of a two-step approach to estimating multivariate rotated GARCH-BEKK (RBEKK) models.From the definition of RBEKK, the unconditional covariance matrix is estimated in the first step to rotate the observed electric swingarm lenses variables in order to have the identity matrix for its sample covariance ma
With the development of commodity economy, the emergence of fake and shoddy products has seriously harmed the interests of consumers and enterprises.To tackle this challenge, customized 2D barcode is proposed to satisfy the requirements of the enterprise anti-counterfeiting certification.Based on information hiding technology, the proposed approach