With the reduction of sequencing costs,optimization of algorithms,and improvement of multi-omics integration capabilities,transcriptomics,as a core technology for analyzing gene expression dynamics and discovering key...With the reduction of sequencing costs,optimization of algorithms,and improvement of multi-omics integration capabilities,transcriptomics,as a core technology for analyzing gene expression dynamics and discovering key functional molecules,has shown great potential in the field of disease prevention and control[1,2].The multi-continental transcriptomics study of tick-borne poxvirus not only provides a new perspective for understanding the evolution and transmission of vector-mediated viruses,but also reflects the trend of transcriptomics research and highlights its key role in disease prevention and control[3].展开更多
Generally,the classic iterative learning control(ILC)methods focus on finding design conditions for repetitive systems to achieve the perfect tracking of any specified trajectory,whereas they ignore a fundamental prob...Generally,the classic iterative learning control(ILC)methods focus on finding design conditions for repetitive systems to achieve the perfect tracking of any specified trajectory,whereas they ignore a fundamental problem of ILC:whether the specified trajectory is trackable,or equivalently,whether there exist some inputs for the repetitive systems under consideration to generate the specified trajectory?The current paper contributes to dealing with this problem.Not only is a concept of trackability introduced formally for any specified trajectory in ILC,but also some related trackability criteria are established.Further,the relation between the trackability and the perfect tracking tasks for ILC is bridged,based on which a new convergence analysis approach is developed for ILC by leveraging properties of a functional Cauchy sequence(FCS).Simulation examples are given to verify the effectiveness of the presented trackability criteria and FCS-induced convergence analysis method for ILC.展开更多
Fault currents emanating from inverter-based resources(IBRs)are controlled to follow specific references to support the power grid during faults.However,these fault currents differ from the typical fault currents fed ...Fault currents emanating from inverter-based resources(IBRs)are controlled to follow specific references to support the power grid during faults.However,these fault currents differ from the typical fault currents fed by synchronous generators,resulting in an improper operation of conventional phase selection methods(PSMs).In this paper,the relative angles between sequence voltages measured at the relay location are determined analytically in two stages:(1)a short-circuit analysis is performed at the fault location to determine the relative angles between sequence voltages;and(2)an analysis of the impact of transmission line on the phase difference between the sequence voltages of relay and fault is conducted for different IBR controllers.Consequently,new PSM zones based on relative angles between sequence voltages are devised to facilitate accurate PSM regardless of the fault currents,resistances,or locations of IBR.Comprehensive time-domain simulations confirm the accuracy of the proposed PSM with different fault locations,resistances,types,and currents.展开更多
文摘With the reduction of sequencing costs,optimization of algorithms,and improvement of multi-omics integration capabilities,transcriptomics,as a core technology for analyzing gene expression dynamics and discovering key functional molecules,has shown great potential in the field of disease prevention and control[1,2].The multi-continental transcriptomics study of tick-borne poxvirus not only provides a new perspective for understanding the evolution and transmission of vector-mediated viruses,but also reflects the trend of transcriptomics research and highlights its key role in disease prevention and control[3].
基金supported in part by the National Natural Science Foundation of China (62273018)in part by the Science and Technology on Space Intelligent Control Laboratory (HTKJ2022KL502006)。
文摘Generally,the classic iterative learning control(ILC)methods focus on finding design conditions for repetitive systems to achieve the perfect tracking of any specified trajectory,whereas they ignore a fundamental problem of ILC:whether the specified trajectory is trackable,or equivalently,whether there exist some inputs for the repetitive systems under consideration to generate the specified trajectory?The current paper contributes to dealing with this problem.Not only is a concept of trackability introduced formally for any specified trajectory in ILC,but also some related trackability criteria are established.Further,the relation between the trackability and the perfect tracking tasks for ILC is bridged,based on which a new convergence analysis approach is developed for ILC by leveraging properties of a functional Cauchy sequence(FCS).Simulation examples are given to verify the effectiveness of the presented trackability criteria and FCS-induced convergence analysis method for ILC.
基金supported by the Natural Sciences and Engineering Research Council of Canada(NSERC)(No.RGPIN-2023-0368)Qatar University(No.QUCG-CENG-24/25-485)。
文摘Fault currents emanating from inverter-based resources(IBRs)are controlled to follow specific references to support the power grid during faults.However,these fault currents differ from the typical fault currents fed by synchronous generators,resulting in an improper operation of conventional phase selection methods(PSMs).In this paper,the relative angles between sequence voltages measured at the relay location are determined analytically in two stages:(1)a short-circuit analysis is performed at the fault location to determine the relative angles between sequence voltages;and(2)an analysis of the impact of transmission line on the phase difference between the sequence voltages of relay and fault is conducted for different IBR controllers.Consequently,new PSM zones based on relative angles between sequence voltages are devised to facilitate accurate PSM regardless of the fault currents,resistances,or locations of IBR.Comprehensive time-domain simulations confirm the accuracy of the proposed PSM with different fault locations,resistances,types,and currents.
