Piezocatalysis and pyrocatalysis can achieve catalytic action with the application of external mechanical energy and varying temperatures.These catalytic processes have been widely applied in various fields,providing ...Piezocatalysis and pyrocatalysis can achieve catalytic action with the application of external mechanical energy and varying temperatures.These catalytic processes have been widely applied in various fields,providing innovative solutions to issues such as water pollution,energy shortages,and global warming.Despite the continuous breakthroughs in the catalytic performance of piezocatalysts and pyrocatalysts,powder-based catalysts face significant limitations due to their inability to be retrieved and the risk of secondary pollution,severely restricting their application.Methods such as compression molding,3 D printing,and the preparation of ceramic-polymer bulk composites can effectively address the issue of catalyst retrievability.However,bulk catalysts,which lose a significant amount of surface area,still need their catalytic performance further enhanced.Therefore,achieving piezocatalysts and pyrocatalysts with excellent catalytic performance and retrievability is of increasing importance.展开更多
The dual active bridge(DAB)is a widely used DC-DC topology owing to its ease of control and ability to achieve various control objectives.When designing a DAB-based system under broadband perturbations,one must model ...The dual active bridge(DAB)is a widely used DC-DC topology owing to its ease of control and ability to achieve various control objectives.When designing a DAB-based system under broadband perturbations,one must model the DAB,calculate its input impedance,and analyze the system stability.In this study,two continuous-time impedance models of the DAB,i.e.,a reduced-order model named the power-based impedance model(PBIM)and a full-order model named the generalized state-space average impedance model(GSSAM),are proposed and used to calculate the input impedance in a single-phase modulation mode.The modeling errors are analyzed,the participation factors and residuals are calculated,and a Bode diagram is constructed to illustrate the change in the input impedance with increasing leakage inductance.Simulations are conducted using various circuit parameters to verify the results.The results show that the PBIM exhibits simplicity and accuracy in the low-frequency domain,whereas the GSSAM performs better in the high-frequency domain.展开更多
基金Project(2022YFB3807404)supported by the National Key Research and Development Program of ChinaProject(52302158)supported by the National Natural Science Foundation of China。
文摘Piezocatalysis and pyrocatalysis can achieve catalytic action with the application of external mechanical energy and varying temperatures.These catalytic processes have been widely applied in various fields,providing innovative solutions to issues such as water pollution,energy shortages,and global warming.Despite the continuous breakthroughs in the catalytic performance of piezocatalysts and pyrocatalysts,powder-based catalysts face significant limitations due to their inability to be retrieved and the risk of secondary pollution,severely restricting their application.Methods such as compression molding,3 D printing,and the preparation of ceramic-polymer bulk composites can effectively address the issue of catalyst retrievability.However,bulk catalysts,which lose a significant amount of surface area,still need their catalytic performance further enhanced.Therefore,achieving piezocatalysts and pyrocatalysts with excellent catalytic performance and retrievability is of increasing importance.
基金Supported by the National Natural Science Foundation of China(52005436).
文摘The dual active bridge(DAB)is a widely used DC-DC topology owing to its ease of control and ability to achieve various control objectives.When designing a DAB-based system under broadband perturbations,one must model the DAB,calculate its input impedance,and analyze the system stability.In this study,two continuous-time impedance models of the DAB,i.e.,a reduced-order model named the power-based impedance model(PBIM)and a full-order model named the generalized state-space average impedance model(GSSAM),are proposed and used to calculate the input impedance in a single-phase modulation mode.The modeling errors are analyzed,the participation factors and residuals are calculated,and a Bode diagram is constructed to illustrate the change in the input impedance with increasing leakage inductance.Simulations are conducted using various circuit parameters to verify the results.The results show that the PBIM exhibits simplicity and accuracy in the low-frequency domain,whereas the GSSAM performs better in the high-frequency domain.
