High entropy materials(HEMs)show great potential as electrocatalysts for oxygen evolution reaction(OER)thanks to their interesting four-core effect.This paper presents the first systematic summary of the key factors i...High entropy materials(HEMs)show great potential as electrocatalysts for oxygen evolution reaction(OER)thanks to their interesting four-core effect.This paper presents the first systematic summary of the key factors in the synthetic methods and their influence on the structure and OER properties of HEMs(including complexing agent,synthetic temperature,and calcination atmosphere).Optimizing the components of high entropy alloys and compounds by introducing heteroatoms(such as O,S,P,N,C,and B)can enhance the chemical configurations of active sites and thus enhance the intrinsic OER kinetics.In addition,this paper emphasizes the importance of the electrocatalytic influence mechanism of the four-core effects(including the high entropy effect,lattice distortion effect,cocktail effect and sluggish diffusion effect)on catalyst structure and their OER performance.Finally,we outline the current challenges and future development directions,aiming to offer crucial insights for creating economical and efficient HEM-based electrocatalysts in the OER field.展开更多
合成孔径雷达(Synthetic Aperture Radar,SAR)成像技术在数字信号处理(Digitial Signal Processor,DSP)芯片上的应用具备实时性好、精度高的优点。为实现SAR成像技术在国产DSP上的应用,本文在分析了SAR成像算法原理和四核HXDSP2441硬件...合成孔径雷达(Synthetic Aperture Radar,SAR)成像技术在数字信号处理(Digitial Signal Processor,DSP)芯片上的应用具备实时性好、精度高的优点。为实现SAR成像技术在国产DSP上的应用,本文在分析了SAR成像算法原理和四核HXDSP2441硬件架构的基础上,提出了一种基于国产HXDSP2441的SAR成像算法的实现和优化方法。该方法运用HXDSP2441四核资源以及并行汇编指令进行SAR成像算法的实现和优化。实验结果表明,该方法实现了1536★2048点数据在国产HXDSP2441上的SAR高分辨率成像,以及通过该优化方法实现了系统运算时间由4.77s缩短至了0.32s,运算时间缩短了15倍,充分的发挥了DSP高实时性的优点,为成像技术在国产DSP上的应用提供了很好的借鉴意义。展开更多
基金supported by the National Natural Science Foundation of China(52103342 and 22209032)the Scientific Research Fund of Zhejiang Provincial Education Department(Y202456353)。
文摘High entropy materials(HEMs)show great potential as electrocatalysts for oxygen evolution reaction(OER)thanks to their interesting four-core effect.This paper presents the first systematic summary of the key factors in the synthetic methods and their influence on the structure and OER properties of HEMs(including complexing agent,synthetic temperature,and calcination atmosphere).Optimizing the components of high entropy alloys and compounds by introducing heteroatoms(such as O,S,P,N,C,and B)can enhance the chemical configurations of active sites and thus enhance the intrinsic OER kinetics.In addition,this paper emphasizes the importance of the electrocatalytic influence mechanism of the four-core effects(including the high entropy effect,lattice distortion effect,cocktail effect and sluggish diffusion effect)on catalyst structure and their OER performance.Finally,we outline the current challenges and future development directions,aiming to offer crucial insights for creating economical and efficient HEM-based electrocatalysts in the OER field.
文摘合成孔径雷达(Synthetic Aperture Radar,SAR)成像技术在数字信号处理(Digitial Signal Processor,DSP)芯片上的应用具备实时性好、精度高的优点。为实现SAR成像技术在国产DSP上的应用,本文在分析了SAR成像算法原理和四核HXDSP2441硬件架构的基础上,提出了一种基于国产HXDSP2441的SAR成像算法的实现和优化方法。该方法运用HXDSP2441四核资源以及并行汇编指令进行SAR成像算法的实现和优化。实验结果表明,该方法实现了1536★2048点数据在国产HXDSP2441上的SAR高分辨率成像,以及通过该优化方法实现了系统运算时间由4.77s缩短至了0.32s,运算时间缩短了15倍,充分的发挥了DSP高实时性的优点,为成像技术在国产DSP上的应用提供了很好的借鉴意义。
