Principal Component Analysis is used for damage detection in structures excited by harmonic forces.Time responses are directly analysed by Singular Value Decomposition to deduct two dominant Proper Orthogonal Values corresponding to two Proper Orthogonal Modes.Damage index is defined by the USB Adaptor Kit concept of subspace angle that a subspace
The percentage of shear fracture largely determines the service performance of 9Ni steel used in low-temperature pressure vessels.Through elemental analysis, microstructural characterization, and mechanical property tests, this study investigates why the percentage of shear fractures is low in 9Ni steel and clarifies the mechanism by which the micr
The Upper Maastrichtian fluvial Hell Creek Formation of the Fort Peck Lake area, Montana (and regional equivalents) is notable for its vertebrate fossils and for the K-Pg mass extinction at or near its upper contact.Despite intense study, internal stratigraphy of the Hell Creek Formation is still poorly constrained, hindering study.This work review
The habit of Muslims to pray in congregation in mosques has a great potential in transmitting the virus because many people gather in one place.There have been calls from the government and MUI as well as several mass organizations to regulate congregational activities at mosques.The public response in responding to this appeal certainly has signif