On July 6,2009,Qualcomm Incorporated,a leading developer and innovator of advanced wireless technologies,products and services,and ZTE Corporation,a leading global provider of telecommunications equipment and network
Transition metal chalcogenides(TMCs)are extensively employed as cathode materials for rechargeable aluminum batteries(RABs)due to their high theoretical specific capacity and voltage plateau.Although promising,practic...Transition metal chalcogenides(TMCs)are extensively employed as cathode materials for rechargeable aluminum batteries(RABs)due to their high theoretical specific capacity and voltage plateau.Although promising,practical applications are hindered by challenges such as inferior structural stability,slow reaction kinetics,and inadequate electronic conductivity.Herein,Mn-ion doping engineering and g-C_(3)N_(4) etched porous carbon frameworks(Mn-ZnSe@CNPC)were integrated to synergistically enhance the electrochemical properties of ZnSe.Through modulating the d-and p-band centers and regulating electronic interactions,Mn-ion doping enhances adsorption for solvent groups and reduces electron transfer energy barriers,resulting in Mn-ZnSe@CNPC cathodes with high redox activity and fast reaction kinetics.In addition,the porous carbon nanocages act as support frameworks,preventing the agglomeration of ZnSe nanoparticles and providing ample ion transport channels,thus addressing issues related to poor cyclability and slow electrochemical kinetics in RABs.Benefiting from the d–p orbital modulation strategy and structural advantages,the tailored Mn-ZnSe@CNPC cathode exhibits boosted electrochemical performance and excellent stability.展开更多
Achieving faster performance without increasing power and energy consumption for computing systems is an outstanding challenge.This paper develops a novel resource allocation scheme for memory-bound applications runni...Achieving faster performance without increasing power and energy consumption for computing systems is an outstanding challenge.This paper develops a novel resource allocation scheme for memory-bound applications running on High-Performance Computing(HPC)clusters,aiming to improve application performance without breaching peak power constraints and total energy consumption.Our scheme estimates how the number of processor cores and CPU frequency setting affects the application performance.It then uses the estimate to provide additional compute nodes to memory-bound applications if it is profitable to do so.We implement and apply our algorithm to 12 representative benchmarks from the NAS parallel benchmark and HPC Challenge(HPCC)benchmark suites and evaluate it on a representative HPC cluster.Experimental results show that our approach can effectively mitigate memory contention to improve application performance,and it achieves this without significantly increasing the peak power and overall energy consumption.Our approach obtains on average 12.69%performance improvement over the default resource allocation strategy,but uses 7.06%less total power,which translates into 17.77%energy savings.展开更多
The undesirable shuttling of lithium polysulfides(LiPSs)and sluggish redo_(x)kinetics lead to the serious reduction in cycle life and sulfur utilization.Herein,to tackle these problems simultaneously,a strategy is dem...The undesirable shuttling of lithium polysulfides(LiPSs)and sluggish redo_(x)kinetics lead to the serious reduction in cycle life and sulfur utilization.Herein,to tackle these problems simultaneously,a strategy is demonstrated for preparing defective Mo_(x)C@NC with rich incorporated Mo vacancies,additional active sites and nitrogen-doped carbon(NC)coating for boosting the performance of Li–S batteries.展开更多
文摘On July 6,2009,Qualcomm Incorporated,a leading developer and innovator of advanced wireless technologies,products and services,and ZTE Corporation,a leading global provider of telecommunications equipment and network
基金supported by the National Natural Science Foundation of China(No.51971118,51771102 and 52371114).
文摘Transition metal chalcogenides(TMCs)are extensively employed as cathode materials for rechargeable aluminum batteries(RABs)due to their high theoretical specific capacity and voltage plateau.Although promising,practical applications are hindered by challenges such as inferior structural stability,slow reaction kinetics,and inadequate electronic conductivity.Herein,Mn-ion doping engineering and g-C_(3)N_(4) etched porous carbon frameworks(Mn-ZnSe@CNPC)were integrated to synergistically enhance the electrochemical properties of ZnSe.Through modulating the d-and p-band centers and regulating electronic interactions,Mn-ion doping enhances adsorption for solvent groups and reduces electron transfer energy barriers,resulting in Mn-ZnSe@CNPC cathodes with high redox activity and fast reaction kinetics.In addition,the porous carbon nanocages act as support frameworks,preventing the agglomeration of ZnSe nanoparticles and providing ample ion transport channels,thus addressing issues related to poor cyclability and slow electrochemical kinetics in RABs.Benefiting from the d–p orbital modulation strategy and structural advantages,the tailored Mn-ZnSe@CNPC cathode exhibits boosted electrochemical performance and excellent stability.
基金supported in part by the Advanced Research Project of China(No.31511010203)the Research Program of NUDT(No.ZK18-03-10)。
文摘Achieving faster performance without increasing power and energy consumption for computing systems is an outstanding challenge.This paper develops a novel resource allocation scheme for memory-bound applications running on High-Performance Computing(HPC)clusters,aiming to improve application performance without breaching peak power constraints and total energy consumption.Our scheme estimates how the number of processor cores and CPU frequency setting affects the application performance.It then uses the estimate to provide additional compute nodes to memory-bound applications if it is profitable to do so.We implement and apply our algorithm to 12 representative benchmarks from the NAS parallel benchmark and HPC Challenge(HPCC)benchmark suites and evaluate it on a representative HPC cluster.Experimental results show that our approach can effectively mitigate memory contention to improve application performance,and it achieves this without significantly increasing the peak power and overall energy consumption.Our approach obtains on average 12.69%performance improvement over the default resource allocation strategy,but uses 7.06%less total power,which translates into 17.77%energy savings.
基金financial support from the National Key Research and Development Program of China(2018YFB0104200)the National Natural Science Foundation of China(5210011286)+1 种基金the Hebei Provincial Natural Science Foundation(E2021208031,B2021208069)the Fundamental Research Funds for the Hebei University(2021YWF11).
文摘The undesirable shuttling of lithium polysulfides(LiPSs)and sluggish redo_(x)kinetics lead to the serious reduction in cycle life and sulfur utilization.Herein,to tackle these problems simultaneously,a strategy is demonstrated for preparing defective Mo_(x)C@NC with rich incorporated Mo vacancies,additional active sites and nitrogen-doped carbon(NC)coating for boosting the performance of Li–S batteries.
