Lithium-sulfur(Li-S)chemistry reaction opens a new battery era with high energy density;meanwhile,multiple electrons migration leads to the complex phase transition of sulfur species.To manipulate the binding strength...Lithium-sulfur(Li-S)chemistry reaction opens a new battery era with high energy density;meanwhile,multiple electrons migration leads to the complex phase transition of sulfur species.To manipulate the binding strength of multiple key intermediates more efficiently,the bimetallic TiVC MXene is utilized to realize multi-dimensional catalysis.Based on the macroscopic three-dimensional(3D)structure using two-dimensional(2D)MXene architecture,electron conductivity and sulfur utilization are improved.Microscopically,Ti-V catalytic systems regulate multiple reaction intermediates through intermetallic synergies customized surface properties and atomic scale coordination,thereby improving electronic and ionic conductivity.In-situ Raman spectroscopy and electrochemical analysis show that the conversion rate of polysulfides was accelerated during the charge-discharge process.The Ti-V interaction exhibits unique catalytic activity and regulates multiple continuous processes of sulfur species phase transformation,which are essential for the excellent energy performance of Li-S batteries.This study not only clarifies the catalytic mechanism of Ti-V at different dimensions but also proposes a promising strategy for the design of advanced catalytic systems in energy storage technology.展开更多
With the advancement of agricultural modernization, agricultural machinery service organizations, as an important part of the rural operating entities, show an increasing trend year by year, and need new facilities la...With the advancement of agricultural modernization, agricultural machinery service organizations, as an important part of the rural operating entities, show an increasing trend year by year, and need new facilities land in the process of development and growth. Based on the written survey of 597 agricultural machinery service organizations in Guizhou Province, the demand and demand gap of various facilities land use in agricultural machinery service organizations were analyzed and compared. In addition, based on the field survey and policy background, the main practices and experiences of agricultural machinery service organizations in Guizhou Province in the approval and use of facility land were sorted out, and the problems and causes of large gap in facility agricultural land, lack of standards and difficulty in policy implementation were analyzed. Finally, it recommended that the site selection of agricultural machinery service organization facilities needs to be standardized, the land demand needs to be coordinated, the land scale needs to be scientifically demonstrated, and financial support should be sought to promote Guizhou agricultural machinery service organization to become bigger, better and stronger.展开更多
Integrating photocatalysis technology with peroxymonosulfate oxidation possesses huge potential for degrading stubborn pollutant.Herein,a porous ultra-thin carbon nitride with C-defect O-doping and advanced n-π^(∗)tr...Integrating photocatalysis technology with peroxymonosulfate oxidation possesses huge potential for degrading stubborn pollutant.Herein,a porous ultra-thin carbon nitride with C-defect O-doping and advanced n-π^(∗)transition was customized by one-pot thermalinduced polymerization of molten urea assisted with paraformaldehyde.Via visible-light coupling peroxymonosulfate activation,the DCN-100 can completely photodegrade 2,4-dichlorophenol,and rate constant is 136.6 and 37.9 times that of CN and DCN-100 without peroxymonosulfate.The light-absorption of DCN-100 surpasses 550 nm,specific surface area rises from 45.03 to 98.58m^(2)/g,and charge behaviors are significantly improved.The effects of paraformaldehyde amount,PMS dosage,pH,2,4-dichlorophenol concentration,different water-body,wavelength and recycling times on photodegradation performance were explored in detail.Via capture experiments,ESR,LC-MS,Fukui-function,TEXT toxicity assessment and DFT theoretical calculation,themain active substances,degradation pathway,intermediate toxicity and enhanced activity mechanism of DCN-100 were clarified.The research provides a cost-effective,high-efficiency and environmental-friendly photocatalysts to activate peroxymonosulfate for water remediating.展开更多
Constructing heterostructures to regulate the electronic structure is an effective strategy for enhancing the oxygen evolution reaction(OER)electrocatalytic activity.Herein,we prepared heterostructured Co_(4)S_(3)/CoP...Constructing heterostructures to regulate the electronic structure is an effective strategy for enhancing the oxygen evolution reaction(OER)electrocatalytic activity.Herein,we prepared heterostructured Co_(4)S_(3)/CoP3(CoPS/NFF)electrocatalysts through a one-step phosphorization and sulfuration process.The synthesized electrode drives an overpotential of 190,272 and 331 mV at 20,50 and 100 mA cm^(−2) for OER in 1 M KOH alkaline media,respectively.These values outperformed those of monophase Co_(4)S_(3) and CoP3 as well as the majority of transition metal-based catalysts previously reported.Furthermore,the Density Functional Theory(DFT)calculation results show that charge redistribution occurs at CoPS/NFF heterogeneous interfaces,which facilitates charge transfer and improves catalytic activity.The CoPS/NFF with heterostructure optimizes the adsorption strength of oxygen-containing intermediates(*O,*OH and*OOH)by appropriately adjusting the d-band center energy level,thereby reducing the energy barrier of OER.This work provides a new perspective on rational design strategies for efficient transition metal-based electrocatalysts by inducing d-band center regulation through the construction of heterostructures.展开更多
Thermal barrier coatings （TBCs） have successfully been used in gas turbine engines for increasing operation temperature and improving engine efficiency. Over the past thirty years, a variety of TBC materials and TBC...Thermal barrier coatings （TBCs） have successfully been used in gas turbine engines for increasing operation temperature and improving engine efficiency. Over the past thirty years, a variety of TBC materials and TBC deposition techniques have been developed. Recently, nanostructured TBCs emerge with the potential of commercial applications in various industries. In this paper, TBC materials and TBC deposition techniques such as air plasma spray （APS）, electron beam physical vapor deposition （EB-PVD）, laser assisted chemical vapor deposition （LACVD） are briefly reviewed. Nanostructured 7-8 wt pct yttria stabilized zirconia （7-8YSZ）TBC by air plasma spraying of powder and new TBC with novel structure deposited by solution precursor plasma spray （SPPS） are compared. Plasma spray conditions, coating forming mechanisms, microstructures,phase compositions, thermal conductivities, and thermal cycling lives of the APS nanostructured TBC and the SPPS nanostructured TBC are discussed. Research opportunities and challenges of nanostructured TBCs deposited by air plasma spray are prospected.展开更多
目的:探讨定岗定编的护理绩效分配方案在护理绩效管理中的应用效果。方法:选取宁波大学医学院附属医院护理人员126例为观察对象,基于原护理绩效考核方案上,增加定岗定编。通过向6个护理单元护士长发放各科室定岗定编问卷调查表,了解科...目的:探讨定岗定编的护理绩效分配方案在护理绩效管理中的应用效果。方法:选取宁波大学医学院附属医院护理人员126例为观察对象,基于原护理绩效考核方案上,增加定岗定编。通过向6个护理单元护士长发放各科室定岗定编问卷调查表,了解科室岗位需求,护士长用人需求,初步拟定护理绩效薪酬改革方案,将各单元定岗定编、工作量、工作质量三方面进行综合效绩考核,运用历史数据和调查访谈对改革方案中各项指标和权重进行测算和调整,开发信息系统实现数据可视化,实践护理人员绩效薪酬改革。结果:该方法应用前后,护理人员辞职率[1.78%(1/126)]和调岗率[1.58%(2/126)]均显著低于改革前[2.59%(3/120)、3.33%(4/120)](χ^(2)=3.75、4.21.均 P < 0.05),护理人员对工作满意度[99.21%(125/126)]显著高于改革前[95.83%(115/120)](χ^(2)=4.52,均 P < 0.05)。 结论:该次绩效考核改革,实现了多劳多得、优劳优酬,在收益分配上向护理岗位倾斜,进而稳定护理队伍,保证护理创效的积极性,为护理绩效考核方案的顺利实施提供有力保障。该研究具备显著创新性和科学性。展开更多
The sudden outbreak of the Coronavirus disease(COVID-19)swept across the world in early 2020,triggering the lockdowns of several billion people across many countries,including China,Spain,India,the U.K.,Italy,France,G...The sudden outbreak of the Coronavirus disease(COVID-19)swept across the world in early 2020,triggering the lockdowns of several billion people across many countries,including China,Spain,India,the U.K.,Italy,France,Germany,Brazil,Russia,and the U.S.The transmission of the virus accelerated rapidly with the most confirmed cases in the U.S.,India,Russia,and Brazil.In response to this national and global emergency,the NSF Spatiotemporal Innovation Center brought together a taskforce of international researchers and assembled implementation strategies to rapidly respond to this crisis,for supporting research,saving lives,and protecting the health of global citizens.This perspective paper presents our collective view on the global health emergency and our effort in collecting,analyzing,and sharing relevant data on global policy and government responses,human mobility,environmental impact,socioeconomical impact;in developing research capabilities and mitigation measures with global scientists,promoting collaborative research on outbreak dynamics,and reflecting on the dynamic responses from human societies.展开更多
Building pattern recognition is important for understanding urban forms,automating map generalization,and visualizing 3D city models.However,current approaches based on object-independent methods have limitations in c...Building pattern recognition is important for understanding urban forms,automating map generalization,and visualizing 3D city models.However,current approaches based on object-independent methods have limitations in capturing all visually aware patterns due to the part-based nature of human vision.Moreover,these approaches also suffer from inefficiencies when applying proximity graph models.To address these limitations,we propose a framework that leverages multi-scale data and a knowledge graph,focusing on recognizing C-shaped building patterns.We first employ a specialized knowledge graph to represent the relationships between buildings within and across various scales.Subsequently,we convert the rules for C-shaped pattern recognition and enhancement into query conditions,where the enhancement refers to using patterns recognized at one scale to enhance pattern recognition at other scales.Finally,rule-based reasoning is applied within the constructed knowledge graph to recognize and enrich C-shaped building patterns.We verify the effectiveness of our method using multi-scale data with three levels of detail(LODs)collected from AMap,and our method achieves a higher recall rate of 26.4%for LOD1,20.0%for LOD2,and 9.1%for LOD3 compared to existing methods with similar precisionrates.We,also achieve recognition efficiency improvements of 0.91,1.37,and 9.35 times,respectively.展开更多
基金the financial support provided by the National Natural Science Foundation of China(No.51932005)the Liaoning Revitalization Talents Program(No.XLYC1807175)+1 种基金the Development Plan of Science and Technology of Jilin Province,China(YDZJ202301ZYTS280)the Natural Science Foundation of Jilin Province(YDZJ202401316ZYTS)。
文摘Lithium-sulfur(Li-S)chemistry reaction opens a new battery era with high energy density;meanwhile,multiple electrons migration leads to the complex phase transition of sulfur species.To manipulate the binding strength of multiple key intermediates more efficiently,the bimetallic TiVC MXene is utilized to realize multi-dimensional catalysis.Based on the macroscopic three-dimensional(3D)structure using two-dimensional(2D)MXene architecture,electron conductivity and sulfur utilization are improved.Microscopically,Ti-V catalytic systems regulate multiple reaction intermediates through intermetallic synergies customized surface properties and atomic scale coordination,thereby improving electronic and ionic conductivity.In-situ Raman spectroscopy and electrochemical analysis show that the conversion rate of polysulfides was accelerated during the charge-discharge process.The Ti-V interaction exhibits unique catalytic activity and regulates multiple continuous processes of sulfur species phase transformation,which are essential for the excellent energy performance of Li-S batteries.This study not only clarifies the catalytic mechanism of Ti-V at different dimensions but also proposes a promising strategy for the design of advanced catalytic systems in energy storage technology.
文摘With the advancement of agricultural modernization, agricultural machinery service organizations, as an important part of the rural operating entities, show an increasing trend year by year, and need new facilities land in the process of development and growth. Based on the written survey of 597 agricultural machinery service organizations in Guizhou Province, the demand and demand gap of various facilities land use in agricultural machinery service organizations were analyzed and compared. In addition, based on the field survey and policy background, the main practices and experiences of agricultural machinery service organizations in Guizhou Province in the approval and use of facility land were sorted out, and the problems and causes of large gap in facility agricultural land, lack of standards and difficulty in policy implementation were analyzed. Finally, it recommended that the site selection of agricultural machinery service organization facilities needs to be standardized, the land demand needs to be coordinated, the land scale needs to be scientifically demonstrated, and financial support should be sought to promote Guizhou agricultural machinery service organization to become bigger, better and stronger.
基金supported by the Natural Science Foundation Project of Jilin Province(Nos.20230101297JC,YDZJ202201ZYTS347,YDZJ202101ZYTS073,20210101117JC,YDZJ202201ZYTS349,YDZJ202102CXJD049)the National Natural Science Foundation(22004047)+4 种基金China Postdoctoral Science Foundation(No.2023M731299)the Project of Jilin Province Development and Reform Commission(Nos.2023C032-5,2023C032-4,2023C032-2)the Project of Human Resources and Social Security Department of Jilin Province(No.2023337)the National College students’innovation and entrepreneurship training program(No.202310203008)the Project of Education Department of Jilin Province(Nos.JJKH20220429KJ,JJKH20210460KJ).
文摘Integrating photocatalysis technology with peroxymonosulfate oxidation possesses huge potential for degrading stubborn pollutant.Herein,a porous ultra-thin carbon nitride with C-defect O-doping and advanced n-π^(∗)transition was customized by one-pot thermalinduced polymerization of molten urea assisted with paraformaldehyde.Via visible-light coupling peroxymonosulfate activation,the DCN-100 can completely photodegrade 2,4-dichlorophenol,and rate constant is 136.6 and 37.9 times that of CN and DCN-100 without peroxymonosulfate.The light-absorption of DCN-100 surpasses 550 nm,specific surface area rises from 45.03 to 98.58m^(2)/g,and charge behaviors are significantly improved.The effects of paraformaldehyde amount,PMS dosage,pH,2,4-dichlorophenol concentration,different water-body,wavelength and recycling times on photodegradation performance were explored in detail.Via capture experiments,ESR,LC-MS,Fukui-function,TEXT toxicity assessment and DFT theoretical calculation,themain active substances,degradation pathway,intermediate toxicity and enhanced activity mechanism of DCN-100 were clarified.The research provides a cost-effective,high-efficiency and environmental-friendly photocatalysts to activate peroxymonosulfate for water remediating.
基金supported by the Natural Science Foundation Project of Jilin Province(Nos.YDZJ202401471ZYTS,YDZJ202301ZYTS255,YDZJ202102CXJD049,and 20220201125GX)the Project of Jilin Province Development and Reform Commission(No.2023C032-2).
文摘Constructing heterostructures to regulate the electronic structure is an effective strategy for enhancing the oxygen evolution reaction(OER)electrocatalytic activity.Herein,we prepared heterostructured Co_(4)S_(3)/CoP3(CoPS/NFF)electrocatalysts through a one-step phosphorization and sulfuration process.The synthesized electrode drives an overpotential of 190,272 and 331 mV at 20,50 and 100 mA cm^(−2) for OER in 1 M KOH alkaline media,respectively.These values outperformed those of monophase Co_(4)S_(3) and CoP3 as well as the majority of transition metal-based catalysts previously reported.Furthermore,the Density Functional Theory(DFT)calculation results show that charge redistribution occurs at CoPS/NFF heterogeneous interfaces,which facilitates charge transfer and improves catalytic activity.The CoPS/NFF with heterostructure optimizes the adsorption strength of oxygen-containing intermediates(*O,*OH and*OOH)by appropriately adjusting the d-band center energy level,thereby reducing the energy barrier of OER.This work provides a new perspective on rational design strategies for efficient transition metal-based electrocatalysts by inducing d-band center regulation through the construction of heterostructures.
文摘Thermal barrier coatings （TBCs） have successfully been used in gas turbine engines for increasing operation temperature and improving engine efficiency. Over the past thirty years, a variety of TBC materials and TBC deposition techniques have been developed. Recently, nanostructured TBCs emerge with the potential of commercial applications in various industries. In this paper, TBC materials and TBC deposition techniques such as air plasma spray （APS）, electron beam physical vapor deposition （EB-PVD）, laser assisted chemical vapor deposition （LACVD） are briefly reviewed. Nanostructured 7-8 wt pct yttria stabilized zirconia （7-8YSZ）TBC by air plasma spraying of powder and new TBC with novel structure deposited by solution precursor plasma spray （SPPS） are compared. Plasma spray conditions, coating forming mechanisms, microstructures,phase compositions, thermal conductivities, and thermal cycling lives of the APS nanostructured TBC and the SPPS nanostructured TBC are discussed. Research opportunities and challenges of nanostructured TBCs deposited by air plasma spray are prospected.
文摘目的:探讨定岗定编的护理绩效分配方案在护理绩效管理中的应用效果。方法:选取宁波大学医学院附属医院护理人员126例为观察对象,基于原护理绩效考核方案上,增加定岗定编。通过向6个护理单元护士长发放各科室定岗定编问卷调查表,了解科室岗位需求,护士长用人需求,初步拟定护理绩效薪酬改革方案,将各单元定岗定编、工作量、工作质量三方面进行综合效绩考核,运用历史数据和调查访谈对改革方案中各项指标和权重进行测算和调整,开发信息系统实现数据可视化,实践护理人员绩效薪酬改革。结果:该方法应用前后,护理人员辞职率[1.78%(1/126)]和调岗率[1.58%(2/126)]均显著低于改革前[2.59%(3/120)、3.33%(4/120)](χ^(2)=3.75、4.21.均 P < 0.05),护理人员对工作满意度[99.21%(125/126)]显著高于改革前[95.83%(115/120)](χ^(2)=4.52,均 P < 0.05)。 结论:该次绩效考核改革,实现了多劳多得、优劳优酬,在收益分配上向护理岗位倾斜,进而稳定护理队伍,保证护理创效的积极性,为护理绩效考核方案的顺利实施提供有力保障。该研究具备显著创新性和科学性。
基金NSF(1841520,1835507,1832465,2028791 and 2025783)the NSF Spatiotemporal Innovation Center members.
文摘The sudden outbreak of the Coronavirus disease(COVID-19)swept across the world in early 2020,triggering the lockdowns of several billion people across many countries,including China,Spain,India,the U.K.,Italy,France,Germany,Brazil,Russia,and the U.S.The transmission of the virus accelerated rapidly with the most confirmed cases in the U.S.,India,Russia,and Brazil.In response to this national and global emergency,the NSF Spatiotemporal Innovation Center brought together a taskforce of international researchers and assembled implementation strategies to rapidly respond to this crisis,for supporting research,saving lives,and protecting the health of global citizens.This perspective paper presents our collective view on the global health emergency and our effort in collecting,analyzing,and sharing relevant data on global policy and government responses,human mobility,environmental impact,socioeconomical impact;in developing research capabilities and mitigation measures with global scientists,promoting collaborative research on outbreak dynamics,and reflecting on the dynamic responses from human societies.
基金supported by The National Natural Science Foundation of China(No.41871378)The Youth Inno-vation Promotion Association Foundation of Chinese Academic of Sciences(No.Y9C0060)+1 种基金Fundamental Research Funds for the Central Universities(No.070323006)State Key Laboratory of Networking and Switching Tech-nology(No.600123442).
文摘Building pattern recognition is important for understanding urban forms,automating map generalization,and visualizing 3D city models.However,current approaches based on object-independent methods have limitations in capturing all visually aware patterns due to the part-based nature of human vision.Moreover,these approaches also suffer from inefficiencies when applying proximity graph models.To address these limitations,we propose a framework that leverages multi-scale data and a knowledge graph,focusing on recognizing C-shaped building patterns.We first employ a specialized knowledge graph to represent the relationships between buildings within and across various scales.Subsequently,we convert the rules for C-shaped pattern recognition and enhancement into query conditions,where the enhancement refers to using patterns recognized at one scale to enhance pattern recognition at other scales.Finally,rule-based reasoning is applied within the constructed knowledge graph to recognize and enrich C-shaped building patterns.We verify the effectiveness of our method using multi-scale data with three levels of detail(LODs)collected from AMap,and our method achieves a higher recall rate of 26.4%for LOD1,20.0%for LOD2,and 9.1%for LOD3 compared to existing methods with similar precisionrates.We,also achieve recognition efficiency improvements of 0.91,1.37,and 9.35 times,respectively.
