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Quickly obtaining densely dispersed coherent particles in steel matrix and its related mechanical property
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作者 xiaoxiao wang Qingsong Huang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2025年第1期111-118,共8页
Densely distributed coherent nanoparticles(DCN)in steel matrix can enhance the work-hardening ability and ductility of steel simultaneously.All the routes to this end can be generally classified into the liquid-solid ... Densely distributed coherent nanoparticles(DCN)in steel matrix can enhance the work-hardening ability and ductility of steel simultaneously.All the routes to this end can be generally classified into the liquid-solid route and the solid-solid route.However,the formation of DCN structures in steel requires long processes and complex steps.So far,obtaining steel with coherent particle enhancement in a short time remains a bottleneck,and some necessary steps remain unavoidable.Here,we show a high-efficiency liquid-phase refining process reinforced by a dynamic magnetic field.Ti-Y-Mn-O particles had an average size of around(3.53±1.21)nm and can be obtained in just around 180 s.These small nanoparticles were coherent with the matrix,implying no accumulated dislocations between the particles and the steel matrix.Our findings have a potential application for improving material machining capacity,creep resistance,and radiation resistance. 展开更多
关键词 ferritic steels coherent particles MICROSTRUCTURE compression test work hardening
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Graphene Nanoribbons Enhancing the Electronic Conductivity and Ionic Diffusion of Graphene Electrodes for High-Performance Microsupercapacitors
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作者 Yan Zhang Huandi Zhang +7 位作者 xiaoxiao wang Xiaowei Shi Zehua Zhao Yaling wang Jiamei Liu Cheng Tang Guolong wang Lei Li 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第4期285-294,共10页
The electrochemical performance of microsupercapacitors with graphene electrodes is reduced by the issue of graphene sheets aggregation,which limits electrolyte ions penetration into electrode.Increasing the space bet... The electrochemical performance of microsupercapacitors with graphene electrodes is reduced by the issue of graphene sheets aggregation,which limits electrolyte ions penetration into electrode.Increasing the space between graphene sheets in electrodes facilitates the electrolyte ions penetration,but sacrifices its electronic conductivity which also influences the charge storage ability.The challenging task is to improve the electrodes’electronic conductivity and ionic diffusion simultaneously,boosting the device’s electrochemical performance.Herein,we experimentally realize the enhancement of both electronic conductivity and ionic diffusion from 2D graphene nanoribbons assisted graphene electrode with porous layer-uponlayer structure,which is tailored by graphene nanoribbons and self-sacrificial templates ethyl cellulose.The designed electrode-based device delivers a high areal capacitance of 71 mF cm^(-2)and areal energy density of 9.83μWh cm^(-2),promising rate performance,outstanding cycling stability with 97%capacitance retention after 20000 cycles,and good mechanical properties.The strategy paves the way for fabricating high-performance graphene-based MSCs. 展开更多
关键词 areal energy density GRAPHENE graphene nanoribbons microsupercapacitors structure engineering
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A Distributed Photovoltaics Ordering Grid-Connected Method for Analyzing Voltage Impact in Radial Distribution Networks
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作者 Cuiping Li Kunqi Gao +4 位作者 Can Chen Junhui Li xiaoxiao wang Yinchi Shao Xingxu Zhu 《Energy Engineering》 EI 2024年第10期2937-2959,共23页
In recent years,distributed photovoltaics(DPV)has ushered in a good development situation due to the advantages of pollution-free power generation,full utilization of the ground or roof of the installation site,and ba... In recent years,distributed photovoltaics(DPV)has ushered in a good development situation due to the advantages of pollution-free power generation,full utilization of the ground or roof of the installation site,and balancing a large number of loads nearby.However,under the background of a large-scale DPV grid-connected to the county distribution network,an effective analysis method is needed to analyze its impact on the voltage of the distribution network in the early development stage of DPV.Therefore,a DPV orderly grid-connected method based on photovoltaics grid-connected order degree(PGOD)is proposed.This method aims to orderly analyze the change of voltage in the distribution network when large-scale DPV will be connected.Firstly,based on the voltagemagnitude sensitivity(VMS)index of the photovoltaics permitted grid-connected node and the acceptance of grid-connected node(AoGCN)index of other nodes in the network,thePGODindex is constructed to determine the photovoltaics permitted grid-connected node of the current photovoltaics grid-connected state network.Secondly,a photovoltaics orderly grid-connected model with a continuous updating state is constructed to obtain an orderly DPV grid-connected order.The simulation results illustrate that the photovoltaics grid-connected order determined by this method based on PGOD can effectively analyze the voltage impact of large-scale photovoltaics grid-connected,and explore the internal factors and characteristics of the impact. 展开更多
关键词 Radial distribution network distributed photovoltaics photovoltaics grid-connected order degree electrical distance photovoltaics action area
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Two-Stage Planning of Distributed Power Supply and Energy Storage Capacity Considering Hierarchical Partition Control of Distribution Network with Source-Load-Storage
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作者 Junhui Li Yuqing Zhang +4 位作者 Can Chen xiaoxiao wang Yinchi Shao Xingxu Zhu Cuiping Li 《Energy Engineering》 EI 2024年第9期2389-2408,共20页
Aiming at the consumption problems caused by the high proportion of renewable energy being connected to the distribution network,it also aims to improve the power supply reliability of the power system and reduce the ... Aiming at the consumption problems caused by the high proportion of renewable energy being connected to the distribution network,it also aims to improve the power supply reliability of the power system and reduce the operating costs of the power system.This paper proposes a two-stage planning method for distributed generation and energy storage systems that considers the hierarchical partitioning of source-storage-load.Firstly,an electrical distance structural index that comprehensively considers active power output and reactive power output is proposed to divide the distributed generation voltage regulation domain and determine the access location and number of distributed power sources.Secondly,a two-stage planning is carried out based on the zoning results.In the phase 1 distribution network-zoning optimization layer,the network loss is minimized so that the node voltage in the area does not exceed the limit,and the distributed generation configuration results are initially determined;in phase 2,the partition-node optimization layer is planned with the goal of economic optimization,and the distance-based improved ant lion algorithm is used to solve the problem to obtain the optimal distributed generation and energy storage systemconfiguration.Finally,the IEEE33 node systemwas used for simulation.The results showed that the voltage quality was significantly improved after optimization,and the overall revenue increased by about 20.6%,verifying the effectiveness of the two-stage planning. 展开更多
关键词 Zoning control two-stage planning site selection and capacity determination optimized scheduling improved ant lion algorithm
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Influences of air CO2 on hydrochemistry of drip water and implications for paleoclimate study in a stream-developed cave, SW China 被引量:4
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作者 xiaoxiao wang Yanhong Wu Licheng Shen 《Acta Geochimica》 EI CAS CSCD 2016年第2期172-183,共12页
Cave air CO_2 is a vital part of the cave environment. Most studies about cave air CO_2 variations are performed in caves with no streams; there are few studies to date regarding the relationship of cave air CO_2 vari... Cave air CO_2 is a vital part of the cave environment. Most studies about cave air CO_2 variations are performed in caves with no streams; there are few studies to date regarding the relationship of cave air CO_2 variations and drip water hydrochemistry in underground stream–developed caves. To study the relationship of underground stream, drip water, and cave air CO_2, monthly and daily monitoring of air CO_2 and of underground stream and drip water was performed in Xueyu Cave from 2012 to 2013.The results revealed that there was marked seasonal variation of air CO_2 and stream hydrochemistry in the cave. Daily variations of cave air CO_2, and of stream and drip water hydrochemistry, were notable during continuous monitoring.A dilution effect was observed by analyzing hydrochemical variations in underground stream and drip water after rainfall. High cave air CO_2 along with low p H and low δ^(13)C DIC in stream and drip water indicated that air CO_2 was one of the dominant factors controlling stream and drip water hydrochemistry on a daily scale. On a seasonal scale, stream flows may promote increased cave air CO_2 in summer; in turn, the higher cave air CO_2 could inhibit degassing of drip water and make calcite δ^(13)C more negative. Variation of calcite δ^(13)C(precipitated from drip water) was in reverse of monthly temperature, soil CO_2, and cave air CO_2. Therefore,calcite δ^(13)C in Xueyu Cave could be used to determine monthly changes outside the cave. However, considering the different precipitation rate of sediment in different seasons,it was difficult to use stalagmites to reconstruct environmental change on a seasonal scale. 展开更多
关键词 Carbon dioxide - Underground stream Dripwater Paleoclimate reconstruction Xueyu Cave
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A review on electronically conducting polymers for lithium-sulfur battery and lithium-selenium battery:Progress and prospects 被引量:3
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作者 Hengying Xiang Nanping Deng +5 位作者 Huijuan Zhao xiaoxiao wang Liying Wei Meng wang Bowen Cheng Weimin Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第7期523-556,共34页
Lithium-sulfur(Li-S) batteries and lithium-selenium(Li-Se) batteries,as environmental protection energy storage systems with outstanding theoretical specific capacities and high energy densities,have become the hotspo... Lithium-sulfur(Li-S) batteries and lithium-selenium(Li-Se) batteries,as environmental protection energy storage systems with outstanding theoretical specific capacities and high energy densities,have become the hotspots of current researches.Besides,elemental S(Se) raw materials are widely sourced and their production costs are both low,which make them considered one of the new generations of high energy density electrochemical energy storage systems with the most potential for development.However,poor conductivity of elemental S/Se and the notorious "shuttle effect" of lithium polysulfides(polyselenides) severely hinder the commercialization of Li-S/Se batteries.Thanks to the excellent electrical conductivity and strong absorption of lithium polysulfide(polyselenide) about electronically conducting polymer,some of the above thorny problems have been effectively alleviated.The review presents the fundamental studies and current development trends of common electronically conducting polymers in various components of Li-S/Se batteries,which involves polyaniline(PANI) polypyrrole(PPy),and polythiophene(PTh) with its derivatives,e.g.polyethoxythiophene(PEDOT) and poly(3,4-ethylene dioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS).Finally,the review not only summarizes the research directions and challenges facing the application of electronically conducting polymers,but also looks forward to the development prospects of them,which will provide a way for the practical use of electronically conducting polymers in Li-S/Se batteries with outstanding electrochemical properties in the short run. 展开更多
关键词 Li-S/Se batteries Electronically conducting polymer Various battery components Suppressed"shuttle effect" Outstanding electrochemical properties
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Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii 被引量:3
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作者 xiaoxiao wang Ziwen Fang +1 位作者 Daqiu Zhao Jun Tao 《Phyton-International Journal of Experimental Botany》 SCIE 2022年第3期599-615,共17页
Paeonia ostii is an economically important oil crop,which has been widely cultivated in the middle and lower reaches of the Yangtze River in China in recent years.Although P.ostii is highly adaptable to the environmen... Paeonia ostii is an economically important oil crop,which has been widely cultivated in the middle and lower reaches of the Yangtze River in China in recent years.Although P.ostii is highly adaptable to the environment,the prolonged high summer temperature in this region severely inhibits its growth,which adversely affects seed yield and quality.In this study,P.ostii plants were subjected to 20℃/15℃(day/night)and 40℃/35℃(day/night)temperatures for 15 days.The changes in physiological and biochemical indicators of P.ostii under high-temperature stress were initially investigated.The results showed that with the deepening of leaf etiolation,chlorophyll a and chlorophyll b concentration,carotenoid concentration,Soil Plant Analysis Development(SPAD)values and leaf relative water content decreased significantly,while both relative electrical conductivity(REC)and free proline concentration showed an upward trend.Meanwhile,the continuous accumulation of reactive oxygen species(ROS)in P.ostii plants,led to an increased activity of antioxidant enzymes including superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)and ascorbate peroxidase(APX).Moreover,with the extension of the high-temperature treatment,the anatomical structures of P.ostii were destroyed,resulting in a decreased photochemical efficiency of the photosystem II(PSII)reaction center and photosynthesis was inhibited.Taken together,these results provide reference values for understanding the physiological response of P.ostii to hightemperature stress and establish a foundation for further research on the relevant underlying molecular mechanisms. 展开更多
关键词 Antioxidant enzymes membrane damage PHOTOSYNTHESIS reactive oxygen species
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Thermo‐driven photocatalytic CO reduction and H_(2) oxidation over ZnO via regulation of reactant gas adsorption electron transfer behavior 被引量:1
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作者 Zhongming wang Hong wang +4 位作者 xiaoxiao wang Xun Chen Yan Yu Wenxin Dai Xianzhi Fu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第9期1538-1552,共15页
Photothermal catalysis is a widely researched field in which the reaction mechanism is usually investigated based on the photochemical behavior of the catalytic material.Considering that the adsorption of reactants is... Photothermal catalysis is a widely researched field in which the reaction mechanism is usually investigated based on the photochemical behavior of the catalytic material.Considering that the adsorption of reactants is essential for catalytic reactions to occur,in this study,the synergistic effect of photothermal catalysis is innovatively elucidated in terms of the electron transfer behavior of reactant adsorption.For the H_(2)+O2 or CO+H_(2)reaction systems over a ZnO catalyst,UV irradiation at 25°C or heat without UV irradiation did not cause H_(2)oxidation or CO reduction;only photothermal conditions(100 or 150°C+UV light)initiated the two reactions.This result is related to the electron transfer behavior associated with the adsorption of CO or H_(2)on ZnO,in which H_(2)or CO that lost an electron could be oxidized by O2 or hydroxyls.However,the electron‐accepting CO could be reduced by the electron‐donating H_(2)into CH4 under photothermal conditions.Based on the in‐situ characterization and theoretical calculation results,it was established that the synergistic effect of the photothermal conditions acted on the(002)crystal surface of ZnO to stimulate the growth of zinc vacancies,which resulted in the formation of defect energy levels,adsorption sites,and an adjusted Fermi level.As a result,the electron transfer behavior between adsorbed CO or H_(2)and the crystal surface varied,which further affected the photocatalytic behavior.The results show that the effect of photothermal synergy may not only produce the expected kinetic energy,but more importantly,produce energy that can change the activation mode of the reactant gas.This study provides a new understanding of the CO catalytic oxidation and reduction processes over semiconductor materials. 展开更多
关键词 Photothermal synergy Electron transfer behavior Adsorption kinetic control In‐situ characterization Fermi level
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Use of near-infrared reflectance spectroscopy for the rapid determination of the digestible energy and metabolizable energy content of corn fed to growing pigs 被引量:4
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作者 Juntao Li Quanfeng Li +4 位作者 Defa Li Yiqiang Chen xiaoxiao wang Wenjun Yang Liying Zhang 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2017年第1期161-169,共9页
Background: The ability of near-infrared reflectance spectroscopy(NIRS) to determine the digestible energy(DE)and metabolizable energy(ME) content of corn fed to growing pigs was tested. One hundred and sevente... Background: The ability of near-infrared reflectance spectroscopy(NIRS) to determine the digestible energy(DE)and metabolizable energy(ME) content of corn fed to growing pigs was tested. One hundred and seventeen corn samples, comprising different planting regions and varieties were collected from all over China in a three-year period. The samples were randomly split into a calibration set(n = 88) and a validation set(n = 29). The actual and calculated DE and ME content of the corn samples was determined by digestion-metabolism experiments and the prediction equations of Noblet and Perez(J Anim Sci. 71:3389–98,1993). The samples were then subjected to NIRS scanning and calibrations were performed by the modified partial least square(MPLS) regression method based on77 different spectral pre-treatments. The NIRS equations based on the actually determined and calculated DE and ME were built separately and then validated using validation samples.Results: The NIRS equations obtained from actually determined DE, the coefficient of determination for calibration(RSQcal), cross-validation(R^2CV), and validation(RSQv) were 0.89, 0.87 and 0.86, and these values for determined ME were 0.87, 0.86 and 0.86. For the NIRS equations built from calculated DE, the RSQcal, R^2CV, and RSQvvalues were 0.88, 0.85 and 0.84, and these values for calculated ME were 0.86, 0.84 and 0.82. Except for the equation based on calculated ME(RPD_v= 2.38, 〈 2.50), the other three equations built from actually determined energy and calculated DE produced good prediction performance(RPD_vranging from 2.53 to 2.69, 〉 2.50) when applied to validation samples.Conclusion: These results indicate that NIRS can be used as a quantitative method for the rapid determination of the available energy in corn fed to growing pigs, and the NIRS equations based on the actually determined energy produced better predictive performance than those built from calculated energy values. 展开更多
关键词 Corn Digestible energy Growing pigs Metabolizable energy Near-infrared reflectance spectroscopy
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3D spiny AlF_(3)/Mullite heterostructure nanofiber as solid-state polymer electrolyte fillers with enhanced ionic conductivity and improved interfacial compatibility 被引量:1
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作者 Weicui Liu Lingshuai Meng +7 位作者 Xueqiang Liu Lu Gao xiaoxiao wang Junbao Kang Jingge Ju Nanping Deng Bowen Cheng Weimin Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第1期503-515,I0013,共14页
Lithium metal batteries assembled with solid-state electrolyte can offer high safety and volumetric energy density compared to liquid electrolyte.The polymer solid-state electrolytes of poly(ethylene oxide)(PEO)are wi... Lithium metal batteries assembled with solid-state electrolyte can offer high safety and volumetric energy density compared to liquid electrolyte.The polymer solid-state electrolytes of poly(ethylene oxide)(PEO)are widely used in lithium metal solid-state batteries due to their unique properties.However,there are still some defects such as low ionic conductivity at room temperature and weak inhibition of lithium dendrite growth.Herein,the spiny inorganic nanofibers heterostructure with mullite whiskers grown on the surface of aluminum fluoride(AlF_(3))nanofibers are introduced into the PEOLi TFSI electrolytes for the first time to prepare composite solid-state electrolytes.The AlF_(3)as a strong Lewis acid can adsorb anions and promote the dissociation of Li salts.Besides,the specially threedimensional(3D)structure enlarges the effective contacting interface with the PEO polymer,which allows the lithium ions to be transported not only along the large aspect ratio of AlF3nanofibers,but also along the mullite phase in the transmembrane direction rapidly.Thereby,the transport channel of lithium ions at the spiny inorganic nanofibers-polymer interface is further improved.Benefiting from these advantages,the obtained composite solid-state electrolyte has a high ionic conductivity of 1.58×10^(-4)S cm^(-1)at 30℃and the lithium ions transfer number of 0.53.In addition,the AlF3has strong binding energy with anions,low electronic conductivity and wide electrochemical stability window,and reduced nucleation overpotential of lithium during cycling,which is positive for lithium dendrite suppression in solid-state electrolytes.Thus,the assembled symmetric Li/Li symmetric batteries exhibit stable cycling performance at different area capacities of 0.15,0.2,0.3 and 0.4 m A h cm^(-2).More importantly,the LiFePO_(4)(LFP)/Li battery still has 113.5 m A h g-1remaining after 400 cycles at 50℃and the Coulomb efficiency is nearly 100%during the long cycle.Overall,the interconnected structure of 3D spiny inorganic heterostructure nanofiber constitutes fast and uninterrupted lithium ions transport channels,maximizing the synergistic effect of interfacial transport of inorganic fillers and reducing PEO crystallinity,thus providing a novel approach to high performance solid-state electrolytes. 展开更多
关键词 3D spiny inorganic nanofibers HETEROSTRUCTURES Composite solid-state electrolytes Ionic conductivity
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工业机器人的空间运行轨迹规划研究
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作者 王肖潇 李连进 +3 位作者 郭珉 李珍 刘晓丽 赵静静 《机械工程与技术》 2017年第1期11-16,共6页
针对国内企业目前主要依靠技术人员进行机器人运行轨迹规划时,常出现效率低和容易发生干涉而影响生产的问题,提出了一种优化计算方法。在对机器人的结构特点和工艺分析的基础上,运用有限元方法建立机器人的虚拟样机模型,仿真计算出模型... 针对国内企业目前主要依靠技术人员进行机器人运行轨迹规划时,常出现效率低和容易发生干涉而影响生产的问题,提出了一种优化计算方法。在对机器人的结构特点和工艺分析的基础上,运用有限元方法建立机器人的虚拟样机模型,仿真计算出模型的末端和各关节的运行轨迹,并与特殊点的数学求解结果进行对比,验证了虚拟样机模型的可靠性,确定机器人的最优运行轨迹,为机器人的设计制造及使用提供依据。 展开更多
关键词 机器人 路径规划 运动仿真 计算模型
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Enhanced ionic conductivity in a novel composite electrolyte based on Gd-doped SnO_(2) nanotubes for ultra-long-life all-solid-state lithium metal batteries
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作者 Lugang Zhang Nanping Deng +7 位作者 Junbao Kang xiaoxiao wang Hongjing Gao Yarong Liu Hao wang Gang wang Bowen Cheng Weimin Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第2期326-337,I0009,共13页
All-solid-state electrolytes are exceedingly attractive because of the outstanding inherent safety and energy density compared to liquid electrolytes.Whereas,it is still formidable to simultaneously design solid elect... All-solid-state electrolytes are exceedingly attractive because of the outstanding inherent safety and energy density compared to liquid electrolytes.Whereas,it is still formidable to simultaneously design solid electrolytes with favorable electrode/electrolyte interface compatibility and high ionic conductivity in a simple and scalable manner.Hence,the oxygen-vacancy-rich Gd-doped SnO_(2) nanotubes(GDS NTs)are innovatively prepared and applied to the electrolyte of all-solid-state lithium metal batteries for the first time.The addition of GDS NTs can validly construct long-range co ntinuous ion transport networks in the poly(ethylene oxide)(PEO)-based system and greatly improve the mechanical properties of the electrolyte.Compared to the PEO-based electrolyte,the composite electrolyte displays a higher lithium ion conductivity of 2.41×10^(-4) S cm^(-1) at 30℃,a higher lithium ion transference number up to 0.62 and a wider electrochemical window of 5 V at 50℃.In addition,the composite electrolyte manifests outstanding compatibility with high-voltage LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811)cathode,LiFePO4 cathode and lithium metal anode.The assembled Li/Li symmetric battery exhibits stable Li plating/stripping cycling performance,which can cycle steadily for 1500 h at a capacity of 0.3 mA h cm^(-2).And Li/LiFePO4 battery still maintains a high capacity of 131.54 mA h g^(-1) at 0.5C after 800 cycles,which has a superior capacity retention rate of 93.2%.The obtained novel composite electrolyte has promising application prospects in the field of all-solid-state lithium metal cells. 展开更多
关键词 All-solid-state lithium metal batteries Gd-doped SnO2 nanotubes Interfacial stability Oxygen vacancies Solid-state composite electrolytes
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Fluoridation routes,function mechanism and application of fluorinated/fluorine-doped nanocarbon-based materials for various batteries:A review
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作者 Weicui Liu Nanping Deng +5 位作者 Gang wang Ruru Yu xiaoxiao wang Bowen Cheng Jingge Ju Weimin Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第10期363-393,I0011,共32页
With the popularity and widespread applications of electronics,higher demands are being placed on the performance of battery materials.Due to the large difference in electronegativity between fluorine and carbon atoms... With the popularity and widespread applications of electronics,higher demands are being placed on the performance of battery materials.Due to the large difference in electronegativity between fluorine and carbon atoms,doping fluorine atoms in nanocarbon-based materials is considered an effective way to improve the performance of used battery.However,there is still a blank in the systematic review of the mechanism and research progress of fluorine-doped nanostructured carbon materials in various batteries.In this review,the synthetic routes of fluorinated/fluorine-doped nanocarbon-based(CF_x)materials under different fluorine sources and the function mechanism of CF_x in various batteries are reviewed in detail.Subsequently,judging from the dependence between the structure and electrochemical performance of nanocarbon sources,the progress of CF_x based on different dimensions(0D–3D)for primary battery applications is reviewed and the balance between energy density and power density is critically discussed.In addition,the roles of CF_x materials in secondary batteries and their current applications in recent years are summarized in detail to illustrate the effect of introducing F atoms.Finally,we envisage the prospect of CF_x materials and offer some insights and recommendations to facilitate the further exploration of CF_x materials for various high-performance battery applications. 展开更多
关键词 Nanocarbon materials Fluorinated/fluorine-doped effect Function mechanism Various batteries
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Selection of Stable Reference Genes for Quantitative Real-Time PCR on Paeonia ostii T.Hong et J.X.Zhang Leaves Exposed to Different Drought Stress Conditions
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作者 Yuting Luan Cong Xu +2 位作者 xiaoxiao wang Daqiu Zhao Jun Tao 《Phyton-International Journal of Experimental Botany》 SCIE 2022年第5期1045-1059,共15页
The definition of relatively stable expressed internal reference genes is essential in both traditional blotting quantification and as a modern data quantitative strategy.Appropriate internal reference genes can accur... The definition of relatively stable expressed internal reference genes is essential in both traditional blotting quantification and as a modern data quantitative strategy.Appropriate internal reference genes can accurately standardize the expression abundance of target genes to avoid serious experimental errors.In this study,the expression profiles of ten candidate genes,ACT1,ACT2,GAPDH,eIF1,eIF2,α-TUB,β-TUB,TBP,RNA Pol II and RP II,were calculated for a suitable reference gene selection in Paeonia ostii T.Hong et J.X.Zhang leaves under various drought stress conditions.Data were processed by the four regularly used evaluation software.A comprehensive analysis revealed that RNA Pol II was the most stable gene and eIF2 was the least stable one.In addition,the geNorm program provided the optimal choice of two reference gene combination,RNA Pol II andβ-TUB,for qRT-PCR normalization in P.ostii subjected to different drought stress levels.Our research provided convenience for gene expression analysis in P.ostii under drought stress and promoted research of effective methods to alleviate P.ostii drought stress in the future. 展开更多
关键词 Paeonia ostii T.Hong et J.X.Zhang reference gene qRT-PCR drought stress
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Construction of senior service system in the context of a healthy China
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作者 Sensen Bian Qing Guo xiaoxiao wang 《Global Health Journal》 2018年第4期28-34,共7页
Entering the new era,the healthy senior service cause in China has achieved great development.However,due to regional differences,there are still certain gaps between the actual demands of ageing service in China and ... Entering the new era,the healthy senior service cause in China has achieved great development.However,due to regional differences,there are still certain gaps between the actual demands of ageing service in China and the policies on senior service.Besides,there are some other problems to be solved,such as unimplemented associated systems and policies,insufficiency of social awareness and participation,ineffective supply and high vacancy of beds in nursing homes,the shortage and low quality of industry personnel.The development of the healthy endowment service industry needs further follow-up according to the actual situation.To solve the problems of insufficient supply of senior service resources,it is necessary to use social funds to encourage interested and capable social organizations and individuals to participate,and to form a system of senior services with Chinese characteristics with multi-disciplinary cooperation of government,industry,universities and institutes. 展开更多
关键词 HEALTHY China SENIOR SERVICE multiple COOPERATION
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Mortality Burden of Liver Cancer in China: An Observational Study From 2008 to 2020 被引量:2
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作者 Huixin Liu xiaoxiao wang +7 位作者 Lijun wang Peng Yin Feng Liu Lai Wei Yu wang Maigeng Zhou Jinlei Qi Huiying Rao 《Journal of Clinical and Translational Hepatology》 SCIE 2024年第4期371-380,共10页
Background and Aims:China accounts for nearly half of liver cancer deaths globally.A better understanding of the current liver cancer mortality will be helpful to establishing priorities for intervention and to decrea... Background and Aims:China accounts for nearly half of liver cancer deaths globally.A better understanding of the current liver cancer mortality will be helpful to establishing priorities for intervention and to decreasing the disease burden of liver cancer.The study aimed to explore and predict the mortality burden of liver cancer in China.Methods:Data were extracted from the Disease Surveillance Point system of the Chinese Center for Disease Control and Prevention from 2008 to 2020.Crude and age-standardized liver cancer mortality rates were reported by sex,urban or rural residence,and region.Trends in liver cancer mortality rates from 2008 to 2020 were estimated as average annual percentage change(AAPC).The changing trend of live cancer mortality in the future is also predicted.Results:In 2020,the crude mortality of liver cancer was 25.57/100,000,and males and people lived in rural areas had higher age-standardized liver cancer mortality rates than females and people lived in people in urban areas.Crude mortality and age-standardized mortality rates in southwest provinces(Guangxi,Sichuan,Tibet)and in a northeast province(Heilongjiang)were higher than that in other provinces,and age-specific mortality rates increased with age.From 2008 to 2020,liver cancer mortality rates decreased,but people under 50 years of age had a higher AAPC than those over 50 years of age,possibly because of the adoption of hepatitis B virus vaccination in newborns and children.Furthermore,the mortality of liver cancer in 2021–2030 is predicted to have a downward trend.Conclusions:Liver cancer mortality rates declined in China from 2008 to 2020.Future interventions to control liver cancer mortality need to focus on people of male sex,older age,and living in rural areas or less developed provinces. 展开更多
关键词 Liver cancer MORTALITY BURDEN TREND China PREDICTION
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双裂纹裂尖拘束效应的表征研究
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作者 宋理想 崔元元 +2 位作者 王骁晓 刘芳 杨杰 《固体力学学报》 CAS CSCD 北大核心 2024年第5期595-609,共15页
为了更清晰地理解双裂纹裂尖的拘束效应,并对双裂纹裂尖拘束进行表征,本文以均质平板中非共线平行双裂纹为研究对象,对双裂纹在不同水平距离s和垂直距离h下的裂尖应力应变场进行了考察.进一步,基于统一拘束参数A_(p),通过和合并后单裂... 为了更清晰地理解双裂纹裂尖的拘束效应,并对双裂纹裂尖拘束进行表征,本文以均质平板中非共线平行双裂纹为研究对象,对双裂纹在不同水平距离s和垂直距离h下的裂尖应力应变场进行了考察.进一步,基于统一拘束参数A_(p),通过和合并后单裂纹裂尖拘束的对比,对双裂纹裂尖拘束进行了表征.结果表明:双裂纹与合并后单裂纹裂尖的应力应变无论从分布还是大小均呈现较大的不同,若还是按照之前计算单裂纹裂尖拘束的办法仅基于双裂纹某个裂尖的应力或应变场计算双裂纹的拘束,将会得到不准确的结果.合并后单裂纹的拘束为0.10~0.30 A_总.该研究有助于理解双裂纹裂尖的拘束效应,为双裂纹裂尖拘束的表征提供了新的思路. 展开更多
关键词 拘束效应 双裂纹 表征
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Enhancing electrolyte ion diffusion via direct ink writing pillar array structure of graphene electrodes for high-performance microsupercapacitors
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作者 Yan Zhang Huandi Zhang +7 位作者 xiaoxiao wang Cheng Tang Xiaowei Shi Zehua Zhao Jiamei Liu Guolong wang Jianfeng Shen Lei Li 《Nano Research》 SCIE EI CSCD 2024年第7期6203-6211,共9页
The graphene-based microsupercapacitors(MSCs)suffer from graphene aggregation issue in electrodes.It reduces the electrolyte ions transportation in the electrodes to degrade the charge storage ability of MSCs,hamperin... The graphene-based microsupercapacitors(MSCs)suffer from graphene aggregation issue in electrodes.It reduces the electrolyte ions transportation in the electrodes to degrade the charge storage ability of MSCs,hampering their practical application.Increasing the electrolyte ions transportation in the electrodes can boost the charge storage ability of MSCs.Herein,we design and experimentally realize pillar array structure of graphene electrodes for MSCs by direct ink writing technology.The graphene electrodes with pillar array structure increase the contact area with electrolyte and short the electrolyte ions transport path,facilitating electrolyte ions transport in electrodes.The MSCs exhibit high areal capacitance of 25.67 mF·cm^(−2),high areal energy density of 20.54μWh·cm^(−2),and high power density of 1.45 mW·cm^(−2).One single MSCs can power timer for 10 min and pressure sensor more than 160 min,showing high practical application possibility.This work provides a new avenue for developing high performance MSCs. 展开更多
关键词 microsupercapacitors pillar array structure direct ink writing areal energy density ion transport
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含裂纹结构拘束相关断裂韧性预测程序研究
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作者 张应华 刘芳 +2 位作者 崔元元 王骁晓 杨杰 《建模与仿真》 2024年第4期4498-4506,共9页
基于统一拘束参数Ap及拘束相关断裂韧性确定方法,采用Matlab软件编写了包含Python脚本的拘束相关断裂韧性预测程序,并借助Matlab App Designer功能完成了对预测程序主界面的设计。预测程序包括3个模块:ODB&MAT模块,Auto Monitor模块... 基于统一拘束参数Ap及拘束相关断裂韧性确定方法,采用Matlab软件编写了包含Python脚本的拘束相关断裂韧性预测程序,并借助Matlab App Designer功能完成了对预测程序主界面的设计。预测程序包括3个模块:ODB&MAT模块,Auto Monitor模块和Manu Monitor模块,预测流程主要包括5个步骤。基于编写好的程序,以单边缺口弯曲(SENB)试样和紧凑拉伸(CT)试样为研究对象,对不同拘束下各试样拘束相关的断裂韧性进行了预测。预测结果显示:预测程序所得开动力曲线与文献中所得具有很好的一致性,对J积分和等值线所围区域面积捕捉正确,对拘束参数Ap的计算及对开动力曲线的绘制准确。通过预测程序所确定的拘束相关断裂韧性与文献中所确定的在10%误差带内,可以较好地对不同拘束下含裂纹结构的拘束相关断裂韧性进行预测。 展开更多
关键词 拘束 断裂韧性 预测程序
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Effect of different operation conditions on PCDD/F inhibition by ammonium dihydrogen phosphate:concentrations,distributions and mechanisms
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作者 Jiayao Wu Weican Xiang +4 位作者 xiaoxiao wang Wenlong Song Yuxuan Ying Xiaoqing Lin Xiaodong Li 《Waste Disposal and Sustainable Energy》 EI CSCD 2024年第1期11-23,共13页
Phosphorus-containing compounds are considered as the potential alternatives of traditional inhibitors for suppressing the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs),but the suppression ... Phosphorus-containing compounds are considered as the potential alternatives of traditional inhibitors for suppressing the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs),but the suppression characteristics are scarcely studied.In this study,ammonium dihydrogen phosphate(ADP)was selected as the inhibitor to inhibit the PCDD/F formation via de novo synthesis at 350℃.The influence of oxygen content and addition method on PCDD/F inhibition was systematically investigated by means of statistical analysis and morphological characterization.The results showed that oxygen enhanced the formation of PCDD/Fs from 1470 ng g^(−1)(9.78 ng I-TEQ g^(−1))to 2110 ng g^(−1)(14.8 ng I-TEQ g^(−1)).ADP significantly inhibited the PCDD/F formation,with inhibition efficiencies ranging from 82.0%to 97.7%.Herein,a higher oxygen content and the premixed way intensified the suppression effect.Dibenzo-p-dioxin(DD)/dibenzofuran(DF)chlorination was proven to be effectively suppressed while chlorophenol(CP)route was not obviously influenced.With the addition of ADP,Cl source was significantly reduced and the formation of organic Cl was effectively inhibited.Also,it decreased the proportion of C–O/C=N and C=O,revealing the efficient inhibition of carbon oxidation.Meanwhile,the formation of copper phosphate and copper pyrophosphate was observed in XPS(X-ray photoelectron spectroscopy)spectra,indicating that the catalytic metal Cu was chelated and passivated by ADP.The premixed way had a better effect on reducing Cl resources,inhibiting oxidation and chelating metals,due to the direct contact with inhibitor.However,the separation method could only depend on the decomposed gases,resulting in a lower inhibition efficiency. 展开更多
关键词 Ammonium dihydrogen phosphate Polychlorinated dibenzo-p-dioxins and dibenzofuran inhibition Oxygen content Adding way MECHANISMS
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