Materials featuring topological energy bands and nontrivial surface states hold significant promise in unlocking unprecedented opportunities for innovating electrocatalytic mechanism.However,it remains a challenge to ...Materials featuring topological energy bands and nontrivial surface states hold significant promise in unlocking unprecedented opportunities for innovating electrocatalytic mechanism.However,it remains a challenge to realize superior topological catalysts which can carry both high catalytic activity and excellent catalytic stability.Here,we propose that a family of Ni-based binary materials hosting fantasying topological conjunct-nodalpoint state and a large nontrivial energy window(NEWD)represents an ideal choice for such superior topological catalysts in hydrogen evolution reaction.The presence of conjunct-nodal-points ensures long Fermi arcs on the surface,thereby enabling an extremely high catalytic activity.The NEWD plays a crucial role in stabilizing the high catalytic activity against external perturbations,such as strain and electron/hole injection.The roles for conjunctnodal-points and NEWD are substantiated by the observable weakening of catalytic performance during topological phase transitions,which result in the removal of the conjunct-nodal-points,NEWD and their corresponding long Fermi arcs.Our work unveils a hidden mechanism and opens a feasible route for developing superior quantum catalysts from novel topology point of view.展开更多
New production line management technologiesare required and adopted recently with the development ofmodern manufacturing industry. In this study, a productionline three-dimensional （3D） visualization monitoring sys-...New production line management technologiesare required and adopted recently with the development ofmodern manufacturing industry. In this study, a productionline three-dimensional （3D） visualization monitoring sys-tem based on OpenGL modeling, open database connec-tivity （ODBC）, and database management technology isestablished on a VC＋＋6.0 platform to satisfy effectiveproduction. A client/server model is adopted in the system,and data on processing information, interactive operation,and failure process are stored in the server side database. Aclient reads the workpiece process information from theserver, and the machining process of every workpiece isvisually represented in the form of 3D visualization. Pro-duction line 3D visualization provides production capacitysimulation to optimize the parameter settings. Whencompared with the analysis results of production linecapacity, the key parameters possess the same optimalvalues, and this proves the accuracy of production line 3Dvisualization monitoring system. The system provideseffective data support for production line monitoring andmanagement in enterprises.展开更多
基金financially supported by the National Natural Science Foundation of China(No.12274112)funded by the Overseas Scientists Sponsorship Program of Hebei Province(No.C20210330)+1 种基金the State Key Laboratory of Reliability and Intelligence of Electrical Equipment of Hebei University of Technology(No.EERI_PI2020009)S&T Program of Hebei(No.225676163GH)。
文摘Materials featuring topological energy bands and nontrivial surface states hold significant promise in unlocking unprecedented opportunities for innovating electrocatalytic mechanism.However,it remains a challenge to realize superior topological catalysts which can carry both high catalytic activity and excellent catalytic stability.Here,we propose that a family of Ni-based binary materials hosting fantasying topological conjunct-nodalpoint state and a large nontrivial energy window(NEWD)represents an ideal choice for such superior topological catalysts in hydrogen evolution reaction.The presence of conjunct-nodal-points ensures long Fermi arcs on the surface,thereby enabling an extremely high catalytic activity.The NEWD plays a crucial role in stabilizing the high catalytic activity against external perturbations,such as strain and electron/hole injection.The roles for conjunctnodal-points and NEWD are substantiated by the observable weakening of catalytic performance during topological phase transitions,which result in the removal of the conjunct-nodal-points,NEWD and their corresponding long Fermi arcs.Our work unveils a hidden mechanism and opens a feasible route for developing superior quantum catalysts from novel topology point of view.
文摘New production line management technologiesare required and adopted recently with the development ofmodern manufacturing industry. In this study, a productionline three-dimensional （3D） visualization monitoring sys-tem based on OpenGL modeling, open database connec-tivity （ODBC）, and database management technology isestablished on a VC＋＋6.0 platform to satisfy effectiveproduction. A client/server model is adopted in the system,and data on processing information, interactive operation,and failure process are stored in the server side database. Aclient reads the workpiece process information from theserver, and the machining process of every workpiece isvisually represented in the form of 3D visualization. Pro-duction line 3D visualization provides production capacitysimulation to optimize the parameter settings. Whencompared with the analysis results of production linecapacity, the key parameters possess the same optimalvalues, and this proves the accuracy of production line 3Dvisualization monitoring system. The system provideseffective data support for production line monitoring andmanagement in enterprises.
