High-speed railway catenaries are vital components in traction power supply systems. To ensure stable contact between the pantograph and catenary, droppers positioned messenger wire line. The failure of one or more will affect catenary operation railway. In this paper, we modify You Only Look Once version five (YOLOv5) model several ways propose a method for improving identification dropper sta...

Defect extremal surface is defined by extremizing the Ryu-Takayanagi formula corrected quantum defect theory. This interesting when AdS bulk contains a brane (or string). We introduce for reflected entropy, which mixed state generalization of entanglement entropy measure. Based on decomposition procedure an with brane, we demonstrate equivalence between and island in AdS$_3$/BCFT$_2$. also comp...

To explore the possibility of using graphene based biosensor, adsorption of hydrogen peroxide on graphene has been investigated using density functional theory. The electronic properties of defect free and defective graphene in the presence of different number of hydrogen peroxide have been studied. The graphene with the most stable configuration defect named as SW defect is considered. The hig...

The control of defects, particularly impurities, to tune the concentrations of electrons and holes is of utmost importance in the use of semiconductor materials. To estimate the amount of dopant that can be added to a semiconductor without precipitating secondary phases, a detailed phase diagram is needed. The ability of ab initio computational methods to predict defect stability can greatly ac...

The second-order topological photonic crystal with 0D corner state provides a new way to investigate cavity quantum electrodynamics and develop nanophotonic devices diverse functionalities. Here, we report on the optimization robustness of in both theory experiment. nanocavity is formed based 2D generalized Su-Schrieffer-Heeger model. quality factor optimized theoretically experimentally by cha...

bifid cardiac apex is a rare anomaly of human hearts. we report of the case of a 34-year-old man with a previous history of ventricular septal defect (vsd) and subvalvular pulmonary stenosis. he had undergone pulmonary commissurotomy and vsd closure 22 years before he was referred to our center for evaluation of progressive dyspnea. transthoracic echocardiography revealed atrial septal defect (...