Accelerating the development of lithium resources has attracted a great deal of attention with the explosive growth of new energy vehicles.As a new technology,electrochemical lithium ion pumping(ELIP)is featured by en...Accelerating the development of lithium resources has attracted a great deal of attention with the explosive growth of new energy vehicles.As a new technology,electrochemical lithium ion pumping(ELIP)is featured by environment-friendly,low energy consumption and high efficiency.This review summarizes the research progress in ELIP,and focuses on the evaluation methods,electrode materials and electrochemical systems of ELIP.It can be concluded that ELIP is expected to achieve an industrial application and has a promising prospect.In addition,challenges and perspective of electrochemical lithium extraction are also highlighted.展开更多
Biology systems harvest solar energy to regulate ions and molecules precisely across cell membrane that is essential to maintain their life sustainability.Recently,artificial light-driven directional ion transport thr...Biology systems harvest solar energy to regulate ions and molecules precisely across cell membrane that is essential to maintain their life sustainability.Recently,artificial light-driven directional ion transport through graphene oxide membranes has been established,where the membrane converts light power into a transmembrane motive force.Herein,we report a silver nanoparticles decorated graphene oxide membranes for enhanced photo-driven ionic transport.Asymmetric light stimulated charge carrier dynamics,such as advanced light absorption efficiency,extended lifetime and efficient separation of photo-excited charge carriers,are account for the ion-driven force enhancement.Based on metal nanoparticles decoration,the concept of the guest-interactions of plasmon-enhanced photo-driven ion transport in two-dimentional layered membranes will stimulate broad researches in sensing,energy storage and conversion and water treatment.展开更多
Background Ion pump control system of HIRFL is designed based on the real-time distributed control software,EPICS.The hardware architecture,communication principle,database design and interlock design are introduced a...Background Ion pump control system of HIRFL is designed based on the real-time distributed control software,EPICS.The hardware architecture,communication principle,database design and interlock design are introduced and elaborated in the paper.Methods PLC has been adopted to realize functions such as control monitoring and data communication.Interlock protect ion has been designed for ion pump control system to prevent damaging from high voltage.Results The test results show that the system has fast response function and high-speed data processing during the beam running and tuning.The response time of the system could reach 100 ms,the rate of data acquisition reaches to 10 time/s and the interlock protection time less than 40 ms.Conclusion The reliable and stable long-term operation of the vacuum system indicates that the performance has been constantly improved with the continuous optimization of the ion pump control system.展开更多
We study the absorption-dispersion process and group index of weak probe field in a four-level Er^3＋：YAG crystal.We find that the Er^3＋ion concentration and incoherent pumping field can influence the absorption-dis...We study the absorption-dispersion process and group index of weak probe field in a four-level Er^3＋：YAG crystal.We find that the Er^3＋ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field. Moreover, our results show that Er^3＋ion concentration plays a major role in lasing without inversion and absorption with inversion.展开更多
Resonance lines are extensively used to diagnose electronic temperature Te and ions distribution. However, the analysis of the x-ray spectroscopy emitted from plasmas produced by a ns laser Jsually needs the help of a...Resonance lines are extensively used to diagnose electronic temperature Te and ions distribution. However, the analysis of the x-ray spectroscopy emitted from plasmas produced by a ns laser Jsually needs the help of a code or some assumptions. In this paper, a diagnostic idea of using line-pairs emitted from a doubly-excited state is proposed. By using the method presented in this paper, Te and the fractional population ratio of bare nuclei and H-like ions are directly obtained from the emission intensity ratios.展开更多
A fundamental problem for cells with their fragile membranes is the control of their volume.The primordial solution to this problem is the active transport of ions across the cell membrane to modulate the intracellula...A fundamental problem for cells with their fragile membranes is the control of their volume.The primordial solution to this problem is the active transport of ions across the cell membrane to modulate the intracellular osmotic pressure.In this work,a theoretical model of the cellular pump-leak mechanism is proposed within the general framework of linear nonequilibrium thermodynamics.The model is expressed with phenomenological equations that describe passive and active ionic transport across cell membranes,supplemented by an equation for the membrane potential that accounts for the electrogenicity of the ionic pumps.For active ionic transport,the model predicts that the intracellular fluid pressure will be balanced by the osmotic pressure and a new pressure component that arises from the active ionic fluxes.A model for the pump-leak mechanism in an idealized human cell is introduced to demonstrate the applicability of the proposed theory.展开更多
A series of optical thin films for LD pumped all- solid- state laser are discussed. Because of the difference between the pumped wavelength and the output wavelength, various kinds of pumping ways, resonator structure...A series of optical thin films for LD pumped all- solid- state laser are discussed. Because of the difference between the pumped wavelength and the output wavelength, various kinds of pumping ways, resonator structures and laser crystals, there are so many new kinds of optical thin films, including novel edge filters ,high reflection and an- tireflection coatings. The key problems in designing and coating are analyzed, and the researches carried out world- wide in this field are also given.展开更多
基金supported by the National Natural Science Foundation of China(grant numbers 21878133,21908082 and 21722604)the Natural Science Foundation of Jiangsu Province(BK20190854)+2 种基金the China Postdoctoral Science Foundation(2020M671364)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX191622)the Science&Technology Foundation of Zhenjiang(GY2020027)。
文摘Accelerating the development of lithium resources has attracted a great deal of attention with the explosive growth of new energy vehicles.As a new technology,electrochemical lithium ion pumping(ELIP)is featured by environment-friendly,low energy consumption and high efficiency.This review summarizes the research progress in ELIP,and focuses on the evaluation methods,electrode materials and electrochemical systems of ELIP.It can be concluded that ELIP is expected to achieve an industrial application and has a promising prospect.In addition,challenges and perspective of electrochemical lithium extraction are also highlighted.
基金the National Natural Science Foundation of China(No.51603211)the 111 Project(No.B14009).
文摘Biology systems harvest solar energy to regulate ions and molecules precisely across cell membrane that is essential to maintain their life sustainability.Recently,artificial light-driven directional ion transport through graphene oxide membranes has been established,where the membrane converts light power into a transmembrane motive force.Herein,we report a silver nanoparticles decorated graphene oxide membranes for enhanced photo-driven ionic transport.Asymmetric light stimulated charge carrier dynamics,such as advanced light absorption efficiency,extended lifetime and efficient separation of photo-excited charge carriers,are account for the ion-driven force enhancement.Based on metal nanoparticles decoration,the concept of the guest-interactions of plasmon-enhanced photo-driven ion transport in two-dimentional layered membranes will stimulate broad researches in sensing,energy storage and conversion and water treatment.
基金National Nature Science Foundation of China under Grant No.U1632141 and Western Light Foundation of Chinese Academy of Science under Grant No.29Y926040.
文摘Background Ion pump control system of HIRFL is designed based on the real-time distributed control software,EPICS.The hardware architecture,communication principle,database design and interlock design are introduced and elaborated in the paper.Methods PLC has been adopted to realize functions such as control monitoring and data communication.Interlock protect ion has been designed for ion pump control system to prevent damaging from high voltage.Results The test results show that the system has fast response function and high-speed data processing during the beam running and tuning.The response time of the system could reach 100 ms,the rate of data acquisition reaches to 10 time/s and the interlock protection time less than 40 ms.Conclusion The reliable and stable long-term operation of the vacuum system indicates that the performance has been constantly improved with the continuous optimization of the ion pump control system.
文摘We study the absorption-dispersion process and group index of weak probe field in a four-level Er^3＋：YAG crystal.We find that the Er^3＋ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field. Moreover, our results show that Er^3＋ion concentration plays a major role in lasing without inversion and absorption with inversion.
文摘Resonance lines are extensively used to diagnose electronic temperature Te and ions distribution. However, the analysis of the x-ray spectroscopy emitted from plasmas produced by a ns laser Jsually needs the help of a code or some assumptions. In this paper, a diagnostic idea of using line-pairs emitted from a doubly-excited state is proposed. By using the method presented in this paper, Te and the fractional population ratio of bare nuclei and H-like ions are directly obtained from the emission intensity ratios.
文摘A fundamental problem for cells with their fragile membranes is the control of their volume.The primordial solution to this problem is the active transport of ions across the cell membrane to modulate the intracellular osmotic pressure.In this work,a theoretical model of the cellular pump-leak mechanism is proposed within the general framework of linear nonequilibrium thermodynamics.The model is expressed with phenomenological equations that describe passive and active ionic transport across cell membranes,supplemented by an equation for the membrane potential that accounts for the electrogenicity of the ionic pumps.For active ionic transport,the model predicts that the intracellular fluid pressure will be balanced by the osmotic pressure and a new pressure component that arises from the active ionic fluxes.A model for the pump-leak mechanism in an idealized human cell is introduced to demonstrate the applicability of the proposed theory.
文摘A series of optical thin films for LD pumped all- solid- state laser are discussed. Because of the difference between the pumped wavelength and the output wavelength, various kinds of pumping ways, resonator structures and laser crystals, there are so many new kinds of optical thin films, including novel edge filters ,high reflection and an- tireflection coatings. The key problems in designing and coating are analyzed, and the researches carried out world- wide in this field are also given.
