Lithium-sulfur(Li-S)system coupled with thin-film solid electrolyte as a novel high-energy micro-battery has enormous potential for complementing embedded energy harvesters to enable the autonomy of the Internet of Th...Lithium-sulfur(Li-S)system coupled with thin-film solid electrolyte as a novel high-energy micro-battery has enormous potential for complementing embedded energy harvesters to enable the autonomy of the Internet of Things microdevice.However,the volatility in high vacuum and intrinsic sluggish kinetics of S hinder researchers from empirically integrating it into allsolid-state thin-film batteries,leading to inexperience in fabricating all-solid-state thin-film Li-S batteries(TFLSBs).Herein,for the first time,TFLSBs have been successfully constructed by stacking vertical graphene nanosheets-Li2S(VGsLi2S)composite thin-film cathode,lithium-phosphorous-oxynitride(LiPON)thin-film solid electrolyte,and Li metal anode.Fundamentally eliminating Lipolysulfide shuttle effect and maintaining a stable VGs-Li2S/LiPON interface upon prolonged cycles have been well identified by employing the solid-state Li-S system with an“unlimited Li”reservoir,which exhibits excellent longterm cycling stability with a capacity retention of 81%for 3,000 cycles,and an exceptional high temperature tolerance up to 60℃.More impressively,VGs-Li2S-based TFLSBs with evaporated-Li thin-film anode also demonstrate outstanding cycling performance over 500 cycles with a high Coulombic efficiency of 99.71%.Collectively,this study presents a new development strategy for secure and high-performance rechargeable all-solid-state thin-film batteries.展开更多
Tobacco black shank is one of the devastating diseases of tobacco. In recent years, this disease widely occurred in most tobacco-growing areas, which caused disastrous losses and has severely threatened the sustainabl...Tobacco black shank is one of the devastating diseases of tobacco. In recent years, this disease widely occurred in most tobacco-growing areas, which caused disastrous losses and has severely threatened the sustainable development of flue-cured tobacco. In order to lay a theoretical foundation for the better control of tobacco black shank, the occurrence characteristics and integrated control strategis of this disease were systematically discussed according to the aspects of agricultural control, chemical control, biological control, etc.展开更多
The endogenous fluorophores such as reduced nicotinarmide adenine dinucleotide(phosphate)(NAD(P)H)and favin adenine dinucleotide(FAD)in cells and tissues can be imaged by fuo-rescence lifetime imaging microscopy(FLIM)...The endogenous fluorophores such as reduced nicotinarmide adenine dinucleotide(phosphate)(NAD(P)H)and favin adenine dinucleotide(FAD)in cells and tissues can be imaged by fuo-rescence lifetime imaging microscopy(FLIM)to show the tisute morphology features,as well as the biomolecular changes in microenvironment.The two important coenzymes in cellular metabolism,NAD(P)H and FAD,can be used to monitor the cellular metabolic status.This work proposed a novel method to study the uterine metabolism at the adjacent site of healthy cervix.It was found that the benign uterine tumors such as leiomyomas and adenomyosis with abnormal cell growth can be detected by measuring the fluorescence lifetime of NAD(P)H and FAD in adjacent healthy cervical tisues.This method opened a novel strategy for alicted women to undergo the cervical biopsies instead of hysterectomies for detecting tumors,which can preserve the fertility of patients.The FLIM studying on NAD(P)H and FAD indicated the correlation between metabolism and some diseases,including diabetes,hyperthyroidism and obesity.It was also suggested that the metabolic level might be quite different for a patient with a malignant tumnor history.展开更多
In this paper, the genus Amomothrips Bhatti, 1978 is firstly recorded from China and A. associatus is described from the flower of Alpinia zerumbet. This genus is distinguished by ocellar setae Ⅰ present and ocellar ...In this paper, the genus Amomothrips Bhatti, 1978 is firstly recorded from China and A. associatus is described from the flower of Alpinia zerumbet. This genus is distinguished by ocellar setae Ⅰ present and ocellar setae pair Ⅱduplicated. Slide-mounted specimens are deposited in Yunnan Agricultural University, Kunming, China and Australian National Insect Collection, Canberra, Australia, respectively.展开更多
Compressed CO_(2)energy storage(CCES)system has received widespread attention due to its superior performance.This paper proposes a novel CCES concept based on gas-liquid phase change and cold-electricity cogeneration...Compressed CO_(2)energy storage(CCES)system has received widespread attention due to its superior performance.This paper proposes a novel CCES concept based on gas-liquid phase change and cold-electricity cogeneration.Thermodynamic and exergoeconomic analyses are performed under simulation conditions,followed by an investigation of the impacts of various decision parameters on the proposed system.Next,a multi-objective optimization is conducted with the total energy efficiency and total product unit cost as the objective functions.Finally,brief comparisons are made between the proposed system and existing systems.The results indicate that the total energy efficiency of the proposed system reaches 79.21%under the given simulation conditions,outperforming the electrical efficiency of 61.27%.Additionally,the total product unit cost of the system is 25.61$/GJ.A key component,T1,plays an important role due to its large exergy destruction rate(1.0591 MW)and total investment cost rate(154.85$/h).Despite this,the exergoeconomic factors of T1 is only 41.08%,indicating that investing in T1 to improve the efficiency is practicable.The analysis shows that a lower CO_(2)condensation temperature benefits the proposed system performance.While improving the isentropic efficiencies of the compressors and turbines enhances total energy efficiency,excessive isentropic efficiencies can lead to a significant increase in total product unit cost.Through multi-objective optimization,an optimal favorable operating condition is identified,yielding a compromise result with a total energy efficiency of 111.91%and a total product unit cost of 28.35$/GJ.The proposed CCES system efficiently delivers both power and cooling energy,demonstrating clear superiorities over previous systems.展开更多
The development of sulfur host materials with high catalytic activity to tackle the shuttling effect of polysulfides and their slow conversion kinetics is a prospective strategy for improving the performance of lithiu...The development of sulfur host materials with high catalytic activity to tackle the shuttling effect of polysulfides and their slow conversion kinetics is a prospective strategy for improving the performance of lithium-sulfur batteries.However,it may result in excessively thick Li_(2)S films that cover the entire electrode structure,consequently weakening the functionalization effect of the sulfur host.Herein,we developed a hierarchical structured sulfur host material composed of a three-dimensional composite conductive network of carbon nanotubes and Ni nanoparticles,along with Ni_(0.85)Se nanosheets grown on its surface.The synergistic effects of hierarchical structure and conductive network accelerate the electron and ion transport,mitigate the volume expansion during lithiation,enhance the conversion kinetics of polysulfides,and importantly prevent the agglomeration of thick Li_(2)S films,which results in a significant improvement in the electrochemical performance of the sulfur cathode.The developed CC@CNT/Ni-Ni_(0.85)Se-S exhibits excellent rate performance and long-term stability,achieving a discharge-specific capacity of 965 mA h g^(-1) at 3 C and maintaining a discharge-specific capacity of 789 mA h g^(-1) even after 300 cycles at 1 C.Notably,the capacity retention rate is as high as 92.9%for 100 cycles at 0.1 C,even with a high sulfur loading of 4.0 mg mg^(-2).This work not only effectively mitigates the agglomeration of Li_(2)S film but also offers a novel design approach for the practical application of high-energy-density lithium-sulfur batteries.展开更多
The Lunar Orbital VLB I Experiment(LOVEX)is a scientific component of the Chinese Lunar Exploration Project(CLEP)Chang'E-7.The spaceborne component of LOVEX is implemented onboard the relay satellite QueQiao-2,whi...The Lunar Orbital VLB I Experiment(LOVEX)is a scientific component of the Chinese Lunar Exploration Project(CLEP)Chang'E-7.The spaceborne component of LOVEX is implemented onboard the relay satellite QueQiao-2,which was launched on 20 March 2024,and later placed into an elliptical selenocentric orbit.The LOVEX-specific payload consists of an X-band cryogenic receiver,a hydrogen maser frequency standard,and VLB I data formatting and acquisition electronics.Several components of the QueQiao-2 nominal onboard instrumentation,such as the 4.2-m antenna,the data storage device,and the downlink communication system,contribute to the overall spaceborne VLBI instrumentation.This allows us to form a space radio telescope capable of co-observing with Earth-based radio telescopes in VLB I mode.In this space VLB I system,the length of the baseline extends up to approximately 380000 km.This paper presents the LOVEX scientific objectives,architecture,instrumentation,prelaunch tests,in-flight verification and calibration,and the first in-flight detections of interferometric response("fringes")achieved through observations of the quasar AO 0235+164 and the Chang'E-6 orbital module,positioned at the Sun-Earth Lagrange point L2.These initial results demonstrate the successful performance of LOVEX,verifying its capability for both astronomical and spacecraft tracking observations at ultra-long VLBI baselines.展开更多
具有高理论容量和高能量密度的锂硫电池被认为是最具前景的储能器件,但其实用化进程受到了多硫化物穿梭效应和氧化还原动力学缓慢等问题的影响.本文将CoSe_(2)纳米颗粒修饰的碳纳米纤维/碳纳米管(CoSe_(2)@CNF/CNT)自支撑膜作为高性能...具有高理论容量和高能量密度的锂硫电池被认为是最具前景的储能器件,但其实用化进程受到了多硫化物穿梭效应和氧化还原动力学缓慢等问题的影响.本文将CoSe_(2)纳米颗粒修饰的碳纳米纤维/碳纳米管(CoSe_(2)@CNF/CNT)自支撑膜作为高性能锂硫电池硫宿主电极.其中,由氮掺杂多孔碳和CNF/CNT组成的导电碳网络能够促进电荷传输,并缓解硫在循环过程中的体积膨胀.CoSe_(2)纳米颗粒兼具化学吸附位点和电催化剂的功能,通过化学吸附锚定多硫化物并加速其氧化还原转换,从而抑制穿梭效应和提高性能.因此CoSe_(2)@CNF/CNT-S电极具有优异的电化学性能,1 C下能提供1098.8 mA h g^(−1)的放电比容量,循环500圈中每圈容量衰减率低至0.06%.这项工作为高能量密度锂硫电池的开发提供了一种新方案.展开更多
基金supported by National Natural Science Foundation of China(No.U22A20118)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(No.2021ZR146,2021ZZ122)Award Program for Fujian Minjiang Scholar Professorship。
文摘Lithium-sulfur(Li-S)system coupled with thin-film solid electrolyte as a novel high-energy micro-battery has enormous potential for complementing embedded energy harvesters to enable the autonomy of the Internet of Things microdevice.However,the volatility in high vacuum and intrinsic sluggish kinetics of S hinder researchers from empirically integrating it into allsolid-state thin-film batteries,leading to inexperience in fabricating all-solid-state thin-film Li-S batteries(TFLSBs).Herein,for the first time,TFLSBs have been successfully constructed by stacking vertical graphene nanosheets-Li2S(VGsLi2S)composite thin-film cathode,lithium-phosphorous-oxynitride(LiPON)thin-film solid electrolyte,and Li metal anode.Fundamentally eliminating Lipolysulfide shuttle effect and maintaining a stable VGs-Li2S/LiPON interface upon prolonged cycles have been well identified by employing the solid-state Li-S system with an“unlimited Li”reservoir,which exhibits excellent longterm cycling stability with a capacity retention of 81%for 3,000 cycles,and an exceptional high temperature tolerance up to 60℃.More impressively,VGs-Li2S-based TFLSBs with evaporated-Li thin-film anode also demonstrate outstanding cycling performance over 500 cycles with a high Coulombic efficiency of 99.71%.Collectively,this study presents a new development strategy for secure and high-performance rechargeable all-solid-state thin-film batteries.
基金Supported by Project of Yunnan Tobacco Company of Science and Technology(2014YN20)
文摘Tobacco black shank is one of the devastating diseases of tobacco. In recent years, this disease widely occurred in most tobacco-growing areas, which caused disastrous losses and has severely threatened the sustainable development of flue-cured tobacco. In order to lay a theoretical foundation for the better control of tobacco black shank, the occurrence characteristics and integrated control strategis of this disease were systematically discussed according to the aspects of agricultural control, chemical control, biological control, etc.
基金supported by the National Natural Science Foundation of China(NSFC)(Grant Nos.11574056,61575046 and 11804350)Ministry of science and technology of the People's Republic of China(China-Serbia bilateral project SINO-SERBIA2018002)+2 种基金the Shanghai Sailing Program(Grant No.17YF1421300)Fudan University-CIOMP Joint Fund(FC2017-007,FC2018-001)Pioneering Project of Academy for Engineering and Technology,Fudan University(gyy2018-001,gyy2018-002).
文摘The endogenous fluorophores such as reduced nicotinarmide adenine dinucleotide(phosphate)(NAD(P)H)and favin adenine dinucleotide(FAD)in cells and tissues can be imaged by fuo-rescence lifetime imaging microscopy(FLIM)to show the tisute morphology features,as well as the biomolecular changes in microenvironment.The two important coenzymes in cellular metabolism,NAD(P)H and FAD,can be used to monitor the cellular metabolic status.This work proposed a novel method to study the uterine metabolism at the adjacent site of healthy cervix.It was found that the benign uterine tumors such as leiomyomas and adenomyosis with abnormal cell growth can be detected by measuring the fluorescence lifetime of NAD(P)H and FAD in adjacent healthy cervical tisues.This method opened a novel strategy for alicted women to undergo the cervical biopsies instead of hysterectomies for detecting tumors,which can preserve the fertility of patients.The FLIM studying on NAD(P)H and FAD indicated the correlation between metabolism and some diseases,including diabetes,hyperthyroidism and obesity.It was also suggested that the metabolic level might be quite different for a patient with a malignant tumnor history.
基金supported by the National Natural Science Foundation of China(31460574)Personnel Training Program of Academic and Technical Leaders of Yunnan Province(2015HB036)Yunnan Agricultural University Innovation Foundation for Postgraduate(2016ykc15)
文摘In this paper, the genus Amomothrips Bhatti, 1978 is firstly recorded from China and A. associatus is described from the flower of Alpinia zerumbet. This genus is distinguished by ocellar setae Ⅰ present and ocellar setae pair Ⅱduplicated. Slide-mounted specimens are deposited in Yunnan Agricultural University, Kunming, China and Australian National Insect Collection, Canberra, Australia, respectively.
基金supported by University Joint Program of Shaanxi Province Key Research Project—Major Project,China(2022GXLH-01-17)Major Project of Shaanxi Province Key Research Project,China(2024PT-ZCK-47).
文摘Compressed CO_(2)energy storage(CCES)system has received widespread attention due to its superior performance.This paper proposes a novel CCES concept based on gas-liquid phase change and cold-electricity cogeneration.Thermodynamic and exergoeconomic analyses are performed under simulation conditions,followed by an investigation of the impacts of various decision parameters on the proposed system.Next,a multi-objective optimization is conducted with the total energy efficiency and total product unit cost as the objective functions.Finally,brief comparisons are made between the proposed system and existing systems.The results indicate that the total energy efficiency of the proposed system reaches 79.21%under the given simulation conditions,outperforming the electrical efficiency of 61.27%.Additionally,the total product unit cost of the system is 25.61$/GJ.A key component,T1,plays an important role due to its large exergy destruction rate(1.0591 MW)and total investment cost rate(154.85$/h).Despite this,the exergoeconomic factors of T1 is only 41.08%,indicating that investing in T1 to improve the efficiency is practicable.The analysis shows that a lower CO_(2)condensation temperature benefits the proposed system performance.While improving the isentropic efficiencies of the compressors and turbines enhances total energy efficiency,excessive isentropic efficiencies can lead to a significant increase in total product unit cost.Through multi-objective optimization,an optimal favorable operating condition is identified,yielding a compromise result with a total energy efficiency of 111.91%and a total product unit cost of 28.35$/GJ.The proposed CCES system efficiently delivers both power and cooling energy,demonstrating clear superiorities over previous systems.
基金supported by the National Natural Science Foundation of China(U22A20118)the Natural Science Foundation of Fujian Province(2023J01400)。
文摘The development of sulfur host materials with high catalytic activity to tackle the shuttling effect of polysulfides and their slow conversion kinetics is a prospective strategy for improving the performance of lithium-sulfur batteries.However,it may result in excessively thick Li_(2)S films that cover the entire electrode structure,consequently weakening the functionalization effect of the sulfur host.Herein,we developed a hierarchical structured sulfur host material composed of a three-dimensional composite conductive network of carbon nanotubes and Ni nanoparticles,along with Ni_(0.85)Se nanosheets grown on its surface.The synergistic effects of hierarchical structure and conductive network accelerate the electron and ion transport,mitigate the volume expansion during lithiation,enhance the conversion kinetics of polysulfides,and importantly prevent the agglomeration of thick Li_(2)S films,which results in a significant improvement in the electrochemical performance of the sulfur cathode.The developed CC@CNT/Ni-Ni_(0.85)Se-S exhibits excellent rate performance and long-term stability,achieving a discharge-specific capacity of 965 mA h g^(-1) at 3 C and maintaining a discharge-specific capacity of 789 mA h g^(-1) even after 300 cycles at 1 C.Notably,the capacity retention rate is as high as 92.9%for 100 cycles at 0.1 C,even with a high sulfur loading of 4.0 mg mg^(-2).This work not only effectively mitigates the agglomeration of Li_(2)S film but also offers a novel design approach for the practical application of high-energy-density lithium-sulfur batteries.
基金supported by the Lunar Orbital VLBI Experiment of the Chang’E-7 Mission in the Chinese Lunar Exploration Programsupport by the International Talent Program of the Chinese Academy of Sciences(Grant No.2024PVA0008)。
文摘The Lunar Orbital VLB I Experiment(LOVEX)is a scientific component of the Chinese Lunar Exploration Project(CLEP)Chang'E-7.The spaceborne component of LOVEX is implemented onboard the relay satellite QueQiao-2,which was launched on 20 March 2024,and later placed into an elliptical selenocentric orbit.The LOVEX-specific payload consists of an X-band cryogenic receiver,a hydrogen maser frequency standard,and VLB I data formatting and acquisition electronics.Several components of the QueQiao-2 nominal onboard instrumentation,such as the 4.2-m antenna,the data storage device,and the downlink communication system,contribute to the overall spaceborne VLBI instrumentation.This allows us to form a space radio telescope capable of co-observing with Earth-based radio telescopes in VLB I mode.In this space VLB I system,the length of the baseline extends up to approximately 380000 km.This paper presents the LOVEX scientific objectives,architecture,instrumentation,prelaunch tests,in-flight verification and calibration,and the first in-flight detections of interferometric response("fringes")achieved through observations of the quasar AO 0235+164 and the Chang'E-6 orbital module,positioned at the Sun-Earth Lagrange point L2.These initial results demonstrate the successful performance of LOVEX,verifying its capability for both astronomical and spacecraft tracking observations at ultra-long VLBI baselines.
基金supported by the National Natural Science Foundation of China(U22A20118)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZR146 and 2021ZZ122)the Award Program for Fujian Minjiang Scholar Professorship.
文摘具有高理论容量和高能量密度的锂硫电池被认为是最具前景的储能器件,但其实用化进程受到了多硫化物穿梭效应和氧化还原动力学缓慢等问题的影响.本文将CoSe_(2)纳米颗粒修饰的碳纳米纤维/碳纳米管(CoSe_(2)@CNF/CNT)自支撑膜作为高性能锂硫电池硫宿主电极.其中,由氮掺杂多孔碳和CNF/CNT组成的导电碳网络能够促进电荷传输,并缓解硫在循环过程中的体积膨胀.CoSe_(2)纳米颗粒兼具化学吸附位点和电催化剂的功能,通过化学吸附锚定多硫化物并加速其氧化还原转换,从而抑制穿梭效应和提高性能.因此CoSe_(2)@CNF/CNT-S电极具有优异的电化学性能,1 C下能提供1098.8 mA h g^(−1)的放电比容量,循环500圈中每圈容量衰减率低至0.06%.这项工作为高能量密度锂硫电池的开发提供了一种新方案.
