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Uncovering the urban-rural integration of China over the past 40 years:Measurement framework and spatial-temporal evolution 认领 引用 被引量：1
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作者 Chuanglin Fang Kewen Wang +6 位作者 Zehui Chen Zhitao Liu Menghang Liu Biao Sun Xia Liao Lingyu Meng Zhiying Yang 《Geography and Sustainability》 CSCD 2026年第3期51-62,共12页
Alleviating the imbalance between urban and rural areas for regional coordinated development is an imperative response to the Sustainable Development Goal 10 of the United Nations.To track China’s urban-rural integra... Alleviating the imbalance between urban and rural areas for regional coordinated development is an imperative response to the Sustainable Development Goal 10 of the United Nations.To track China’s urban-rural integration progress and address the uneven issues in specific fields,this study constructed a novel seven-dimension index system of urban-rural integration,comprising free population mobility,efficient land transfer,interactive economic growth,highly-linked transportation,equal public services,joint environmental governance and unimpeded informatization between urban and rural areas.Based on a comprehensive measurement framework and multi-source panel data,we uncovered the spatial-temporal evolution of urban-rural integration in China’s 367 prefecture-level administrative units from 1980 to 2022.The results demonstrated that China’s urban-rural integration steadily increased from 27.51 to 57.35 with an average annual growth rate of 3.40%.Whereas,the overall urban-rural integration was relatively inferior in 2022,at the level of moderate integration whose proportion of China’s land area was 88.08%.The urban-rural integration level in eastern region and urban agglomerations was higher than that in mid-west and non-urban agglomerations.From the perspective of seven dimensions,interactive economic growth,joint environmental governance and unimpeded informatization made an obvious improvement and reached higher integration,while free population mobility,efficient land transfer,highly-linked transportation and equal public services maintained the stage of moderate integration in 2022.In the future,China should make targeted efforts for urban-rural integration in terms of population,land use,transportation and public services,and accelerate urban-rural common prosperity in the mid-west and economically underdeveloped areas. 展开更多
关键词 Urban-rural integration Measurement framework Spatial-temporal evolution Heterogeneity China
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Spatial-temporal evolution of vegetation evapotranspiration in Hebei Province,China 认领 引用 被引量：5
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作者 WANG Qian-feng TANG Jia +6 位作者 ZENG Jing-yu QU Yan-ping ZHANG Qing SHUI Wei WANG Wu-lin YI Lin LENG Song 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第9期2107-2117,共11页
Evapotranspiration （ET） is the sum of soil or water body evaporation and plant transpiration from the earth surface and ocean to the atmosphere, and thus plays a significant role in regulating carbon and water resou... Evapotranspiration （ET） is the sum of soil or water body evaporation and plant transpiration from the earth surface and ocean to the atmosphere, and thus plays a significant role in regulating carbon and water resource cycles. The time-series data set from the remote sensing MOLDS product （MOD16） was used to study the spatial-temporal evolution of vegetation evapotranspiration in salinized areas during 2000-2014 by analyzing the variability, spatial patterns and Mann-Kendall （MK） nonparametric trends for the time series. The results indicate that inter-annual and intra-annual variations of ET across various vegetated areas show seasonal changes, with the abnormal months identified. The Cultivated land displays a greater degree of spatial heterogeneity and the spatial pattern of ET in the area covered by broadleaved deciduous forests corresponds to a higher ET rate and increased water consumption. Awidespread decline of ET is observed only in cultivated areas. However, agricultural cultivation doesn＇t worsen water shortage and soil salinization problems in the region, and water shortage problems are worsening for other vegetated areas. This research provides a basis of reference for the reasonable allocation of water resources and restructuring of vegetation patterns in salinized areas. 展开更多
关键词 evapotranspiration Hebei Province MODIS spatial pattern vegetation spatial-temporal evolution
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Spatial-temporal Evolution of the Urban-rural Coordination Relationship in Northeast China in 1990-2018 认领 引用 被引量：6
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作者 WANG Ying CHEN Xiaohong +2 位作者 SUN Pingjun LIU Hang HE Jiaxin 《Chinese Geographical Science》 SCIE CSCD 2021年第3期429-443,共15页
To comprehensively understand the law of urban-rural relationship and propose scientific measures of urban-rural coordinated development in Northeast China,this study uses the coupling coordination degree model and ge... To comprehensively understand the law of urban-rural relationship and propose scientific measures of urban-rural coordinated development in Northeast China,this study uses the coupling coordination degree model and geographically and temporally weighted regression(GTWR)model to analyze the spatial-temporal patterns and the corresponding driving mechanisms of its urban-rural coordination since 1990.The results are as follows.First,the urban-rural coupling coordination degree in Northeast China was very low and improved slowly,but its stages of evolution is a good interpretation of the strategic arrangements of China's urbanization.Second,the urban-rural coupling coordination degree in Northeast China had spatial differences and was characterized by central polarization,converging on urban agglomeration,which was high in the south and low in the north.Moreover,the gap between the north and south weakened.Third,the spatial-temporal evolution of the urban-rural coordination relationship in Northeast China was influenced by pulling from the central cities,pushing from rural transformation,and government regulations.The influence intensity of the three mechanisms was weak,but the pulling from the central cities was stronger than that of the other two mechanisms.Furthermore,the spatial difference between the three mechanisms determines the spatial pattern and its evolution of the urban-rural coordination relationship in Northeast China.Fourth,to promote the development of urban-rural coordination in Northeast China,it is essential to advance urban-rural economic correlation,enhance the government^role in regulating and guiding,and adopt different policies for each region in Northeast China. 展开更多
关键词 urban-rural coordination relationship spatial-temporal evolution coupling coordination degree model geographically and temporally weighted regression(GTWR) Northeast China
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Spatial-temporal Evolution Pattern of Agricultural Productivity in Northwestern Sichuan Plateau 认领 引用 被引量：4
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作者 PENG Li SU Chun-jiang +4 位作者 SUN Lian LI Ping FANG Yan LIU Wei WANG Xiao-lan 《Journal of Mountain Science》 SCIE CSCD 2013年第3期418-427,共10页
Currently, the agricultural growth in developed countries mainly relies on the improvement of productivity, which is also the target for China. Accordingly, the purpose of this study was to describe the spatial-tempor... Currently, the agricultural growth in developed countries mainly relies on the improvement of productivity, which is also the target for China. Accordingly, the purpose of this study was to describe the spatial-temporal evolution pattern of agricultural productivity, to reveal changes in total factor productivity in 2ooo-2olo, and analyze the impact of these changes in northwestern Sichuan plateau, China. Using data envelopment analysis （DEA） and the Malmquist Index, an in-depth study was conducted on agricultural productivity and changes in total factor productivity of 31 counties in northwestern Sichuan plateau. Results indicated that： （1） geographically, counties with optimal efficiency were mainly located in the north of northwestern Sichuan plateau and those with the lowest efficiency, in the south; （2） relative to pure technical efficiency, scale efficiency was the dominant factor in determining agricultural productivity; （3） the redundancy rate of input factors in zolo was slightly lower than that in zooo, thereby indicating an improved utilization of input factors to a certain extent and a great potential for further improving such utilization; （4） during the 2ooo-2olo period, the agricultural total factor productivity had an average annual growth rate of 8.3%, but the growth rates in various regions differed widely; （5） technical progress was the dominant factor promoting the improvement of total factor oroductivitv inagriculture. The disparities in spatial distribution may be due to the differences of natural conditions, former level agricultural productivity between counties. The findings are valuable for the government to make sustainable development policies for agriculture and improving agricultural development in northwestern Sichuan plateau. 展开更多
关键词 Agricultural Productivity Spatial-temporal evolution DEA Malmquist Sichuanplateau
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Spatial-temporal Evolution Analysis on Land Use Multifunctionality in the China-Vietnam Border Area 认领 引用 被引量：4
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作者 HUANG Tianneng WANG Nian 《Chinese Geographical Science》 SCIE CSCD 2022年第6期995-1012,共18页
Exploring the spatial and temporal evolution characteristics of the border land use multifunctionality(LUMF)provides insights for taking advantage of border land use and optimizing border land use policies.Based on th... Exploring the spatial and temporal evolution characteristics of the border land use multifunctionality(LUMF)provides insights for taking advantage of border land use and optimizing border land use policies.Based on the improved Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS)mode,this study identifies and evaluates the LUMFs in the China-Vietnam border area between 2000 and 2018 from the perspectives of agricultural production,social security,ecological service,landscape recreation,and national security.The results show that:1)The comprehensive land use functions in most counties and cities continued to be improved.2)The comprehensive land use function exhibits remarkable spatial divergence and aggregation characteristics.The high-value area of the agricultural production function and social security function evolves from the east to the west.In addition,the spatial evolution of ecological service function is complicated,without an obvious spatial divergence and aggregation pattern.The landscape recreation function shows different spatial differentiation characteristics in the early and middle stage,and forms a large cluster in the later stage.Finally,the spatial evolution pattern of the national security function is significant.3)Designing differentiated border land policies,improving border land use security,and establishing a long-term mechanism for ecological protection and ecological compensation can aid in optimizing the LUMF level in the border area. 展开更多
关键词 land use multifunctionality spatial-temporal evolution characteristics improved Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS) spatial analysis China-Vietnam border area
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The Analysis of Spatial-Temporal Evolution of City Accessibility Based on Highway Network in Henan Province in China 认领 引用 被引量：1
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作者 Mingting Ba Hongling Meng +1 位作者 Kaiguang Zhang Yanmin Sun 《Journal of Transportation Technologies》 2021年第2期296-310,共15页
Accessibility is an important tool to evaluate the maturity of a regional traffic network structure which describes the traffic convenience in the traffic network. The paper defines a new accessibility index by using ... Accessibility is an important tool to evaluate the maturity of a regional traffic network structure which describes the traffic convenience in the traffic network. The paper defines a new accessibility index by using the resident population weighted average value of the sum of inverse of the traveling time distance and time threshold coming from ordinary traffic network, and then uses this accessibility index to analyze the spatial-temporal characteristics of Henan highway network, as well as its evolution patterns from 2005 to 2020. The results show that with the expansion and improvement of Henan highway network, city accessibility level has been significantly improved, spatial convergence is obvious, the cities in the north central are always High-High aggregation area, the cities in the south are always Low-Low aggregation area, gradually forming the characteristics of Northwest high and Southeast low, relative balance between East and West. There is some non-conforming phenomenon in highway mileage growth and improvement of the city accessibility levels, but this situation is being weakened, the highway network layout is gradually rationalized, the spatial distribution of city accessibility and that of population are beginning to converge. 展开更多
关键词 Highway Network Accessibility Inverse of Time Distance Spatial Distribution Spatial-Temporal Evolution Spatial Aggregation Henan Province
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Spatial-temporal Evolution and Driving Force of Cultivated Land Quality in Henan Province 认领 引用
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作者 宋艳华 《Agricultural Science & Technology》 CAS 2017年第11期2106-2112,2126,共7页
The purpose of this study was to find out the spatial-temporal rules and driving force of cultivated land quality in Henan Province in the last ten years. Agricultural land grading factor evaluation was used to evalua... The purpose of this study was to find out the spatial-temporal rules and driving force of cultivated land quality in Henan Province in the last ten years. Agricultural land grading factor evaluation was used to evaluate the cultivated land quality of 2002 and 2012 in Henan Province, and to research the change laws. Method of correlation coefficient was employed to select the driving forces affecting cultivated land quality evolution. The results indicated that the cultivated land quality in Henan Province increased slightly in the last ten years in general, and in spatial there were unchanged regions, increased regions and decreased regions. The cultivated land quality in spatial presented the trend of good becoming better, bad becoming worse, which should be highly valued in cultivated land quality protection and management. Land development and consolidation projects had significant contributions to increasing the cultivated land quality. Driving forces between the sudden change regions and gradual change regions were significantly different. The paper concluded that the research on the spatial-temporal evolution and driving force of cultivated land quality based on cultivated land quality evolution had important academic significance and practical value. 展开更多
关键词 Cultivated land quality Spatial-temporal evolution Driving force Sudden change region Gradual change region Henan Province
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Comprehensive evaluation and spatial-temporal evolution characteristics of urban resilience in Chengdu-Chongqing Economic Circle 认领 引用 被引量：2
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作者 Xin Li Shuyi Zhang +1 位作者 Rongxi Ren Yafei Wang 《Chinese Journal of Population,Resources and Environment》 2024年第1期58-67,共10页
To clarify the connotations and extensions of urban resilience,this study focuses on the Chengdu-Chongqing Economic Circle with 16 cities as research subjects.A comprehensive evaluation index system was constructed to... To clarify the connotations and extensions of urban resilience,this study focuses on the Chengdu-Chongqing Economic Circle with 16 cities as research subjects.A comprehensive evaluation index system was constructed to measure the resilience of each city from 2003 to 2020.The spatial-temporal evolution characteristics were analyzed using Kernel density estimation,standard deviation ellipse,and spatial Markov chain analysis,and the spatial Tobit model was introduced to discover the influencing factors.The results indicate the following:①Urban resilience in the Chengdu-Chongqing Economic Circle displays an upward trend,with the center of gravity moving to the southwest,and the polarization phenomenon intensifying.②The urban resilience level in a region has certain spatial and geographical dependence,while the probability of urban resilience transfer differs in adjacent cities with different resilience levels.③Urban centrality,economic scale,openness level,and financial development promote urban resilience,whereas government scale significantly inhibits it.Finally,this paper proposes countermeasures and suggestions to improve the urban resilience of the Chengdu-Chongqing Economic Circle. 展开更多
关键词 Chengdu-chongqing Economic Circle Urban resilience Spatial-temporal evolution Driving factor
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Spatial-temporal evolution of gas migration pathways in coal during shear loading 认领 引用 被引量：2
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作者 Peng Shoujian Xu Jiang +2 位作者 Yin Guangzhi Liu Dong Wang Weizhong 《International Journal of Mining Science and Technology》 EI CAS 2012年第6期769-773,共5页
Custom designed and built meso shear test equipment was used to examine the shear crack propagation in gassy coal under different gas pressures.The spatial-temporal evolution of gas migration pathways in the coal duri... Custom designed and built meso shear test equipment was used to examine the shear crack propagation in gassy coal under different gas pressures.The spatial-temporal evolution of gas migration pathways in the coal during shear loading was also researched.The results show that gas pressure can hasten crack growth at the shear fracture surface,can reduce the shear strength of gassy coal,and can accelerate the shear failure process.Shear failure in gassy coal exhibits five stages:the pre-crack stage;the stable crack growth stage;the unsteady crack growth stage;the fracture stage;and,finally,the friction crack stage.The shear breaking creates two kinds of crack,shear cracks and tensile cracks.Cracks first appear in the shear plane at both ends and then extend toward the center until a shear fracture surface forms.The direction of shear crack propagation diverges from the predetermined shear plane by an angle of about 5°-10°. 展开更多
关键词 Coal Gas Migration pathway Shear loading Spatial-temporal evolution
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The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer 认领 引用 被引量：5
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作者 Xiao-Bo Zheng Nan.Jiang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2015年第1期16-24,共9页
The spatial-temporal evolution of coherent structures （CS） is significant for turbulence control and drag re- duction. Among the CS, low and high speed streak structures show typical burst phenomena. The analysis wa... The spatial-temporal evolution of coherent structures （CS） is significant for turbulence control and drag re- duction. Among the CS, low and high speed streak structures show typical burst phenomena. The analysis was based on a time series of three-dimensional and three-component （3D-3C） velocity fields of the flat plate turbulent boundary layer （TBL） measured by a Tomographic and Time-resolved PIV （Tomo TRPIV） system. Using multi-resolution wavelet transform and conditional sampling method, we extracted the intrinsic topologies and found that the streak structures appear in bar-like patterns. Furthermore, we seized locations and velocity information of transient CS, and then calculated the propagation velocity of CS based on spatial-temporal cross-correlation scanning. This laid a foundation for further studies on relevant dynamics properties. 展开更多
关键词 Log law region in TBL. Spatial-temporal cross-correlation Tomographic TRPIV Coherent structures Low and high speed streaks Multi-resolution wavelet de-composition
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Measurement,Spatial-temporal Evolution and Influence Mechanism of Regional Urban-rural Integration—Taking Zhejiang Province as a Case Study 认领 引用
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作者 LU Yuqi JI Yangqin 《Journal of Resources and Ecology》 CAS CSCD 2026年第2期620-633,共14页
Urban-rural integration is a significant driving force in promoting regional balance,optimizing the allocation of social resources,and achieving high-quality economic development.The study investigates the spatial-tem... Urban-rural integration is a significant driving force in promoting regional balance,optimizing the allocation of social resources,and achieving high-quality economic development.The study investigates the spatial-temporal evolution and influencing factors of urban-rural integration in Zhejiang from 2003 to 2022 based on four dimensions of“economy-society-space-ecology”.The research has found that:Firstly,the overall level of urban-rural integration in Zhejiang is on the rise with certain disparities.Secondly,the integration of urban and rural areas in Zhejiang exhibits a clear clustering phenomenon,presenting a spatial characteristic of“higher in the northeast and lower in the southwest”.Subsequently,per capita GDP,the advancement of the digital economy,the adjustment of industrial structure as well as the proportion of financial support dedicated to agriculture and urban-rural community affairs have played positive roles in promoting the process of urban-rural integration by influencing the flow of resources and factors between urban and rural areas.Accordingly,to further promote urban-rural integration,it is imperative to fully utilize leading cities to drive regional development,bolster the revitalization of mountainous regions and islands,accelerate the adjustment and upgrading of industrial structures,promote the growth of the digital economy,as well as refine the structure of government financial expenditures.This integrated approach will ultimately create a new paradigm of urban-rural integration. 展开更多
关键词 urban-rural integration measurement spatial-temporal evolution influence mechanism
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Spatial-Temporal Evolution Characteristics and Driving Factors of Agricultural Space in Jianghan Plain from the Perspective of “Three-Zone Space” 认领 引用
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作者 Wei Wei Hao Xing 《Open Journal of Ecology》 2020年第2期62-76,共15页
Studying the agricultural spatial distribution characteristics of Jianghan Plain from 2000 to 2018 and its spatial-temporal transformation with ecological space and urban space is of great significance for optimizing ... Studying the agricultural spatial distribution characteristics of Jianghan Plain from 2000 to 2018 and its spatial-temporal transformation with ecological space and urban space is of great significance for optimizing the spatial structure of the country, enhancing the supply capacity of agricultural products, and ensuring food security. The research results show that during the period from 2000 to 2018, the agricultural spatial concentration in the area along the “Xiaogan-Jingzhou” link was relatively high, and the areas with large declines were mainly distributed in the flat areas between the Yangtze River and Han River;the space is continuously reduced by the occupation of ecological space and urban space, and ecological space and urban space have been improved respectively;agricultural space has been transformed into ecological space, and the largest urban space has been transformed. Ecological space has been transformed into agricultural space and urban space. Less urban space has been transformed into agricultural space and ecological space. 展开更多
关键词 Three-Zone Space Jianghan Plain Agricultural Space Spatiotemporal Evolution Driving Factors
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Characterization of Spatial-temporal Evolution of Landscape Ecological Risk in the Three-River Source Region 认领 引用 被引量：1
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作者 LI Hui ZHOU Bin WU Xiaoying 《Journal of Resources and Ecology》 CSCD 2025年第2期326-339,共14页
The Three-River Source Region is an important ecological security barrier in China.Revealing the spati-otemporal evolution characteristics of its landscape types and ecological risks is of great significance for promo... The Three-River Source Region is an important ecological security barrier in China.Revealing the spati-otemporal evolution characteristics of its landscape types and ecological risks is of great significance for promoting ecological restoration and landscape pattern optimization in the Three-River Source Region.Selecting the Three-River Source Region for a case study and applying the land-use data from four periods(the 1990,2000,2010,and 2020),we constructed a landscape ecological risk assessment model for the region based on the landscape pattern index.We then quantitatively assessed the ecological risks and determined the characteristics of their spa-tial-temporal evolution.The results showed that:(1)The overall landscape ecological risk in the Three-River Source Region tended to decrease from northwest to southeast,and the distribution of landscape ecological risk was closely related to the natural plateau zones and the changes in land cover.(2)From 1990 to 2020,the areas covered by grasslands,water bodies,croplands,and construction land in the Three-River Source Region increased,while the areas of woodlands and unused land decreased.The spatial-temporal changes in the ecological landscape risk were consistent with the characteristics of the changes in the landscape types.The areas categorized as highest,higher,medium,lower and lowest risk areas,while highest and higher risk areas decreased by 9.76%,medium risk areas increased by 1.03%,lower risk areas increased by 8.99%,and lowest risk areas decreased by 0.26%,respectively.(3)Overall,the Three-River Source Region was dominated by very low to medium ecological risk,the areas of which accounted for more than 70%of the entire study area.Overall ecological risks are decreasing,and there is positive spatial autocorrelation of landscape ecological risks in adjacent evaluation units. 展开更多
关键词 landscape pattern ecological risk spatial-temporal evolution Three-River Source Region
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Tailoring the d-band center of iridium-doped cobalt selenide for dual-boosted hydrogen and oxygen evolution reactions 认领 引用 被引量：2
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作者 Lulu An Jiang Zhu +1 位作者 Junhao Yang Deli Wang 《Nano Materials Science》 EI CAS CSCD 2026年第3期703-709,共7页
Designing effective electrocatalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is essential for the advancement of water electrolysis.Herein,iridium-doped CoSe2(Ir–CoSe2)nanobelts wi... Designing effective electrocatalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is essential for the advancement of water electrolysis.Herein,iridium-doped CoSe2(Ir–CoSe2)nanobelts with tailored d-band center are designed to boost both HER and OER in alkaline electrolytes.On the one hand,the adsorption ability of H2O and hydrogen on Ir–CoSe2 is increased due to the upshifted d-band center induced by the electron transfer from CoSe2 to Ir,inducing good HER activity with an overpotential of 126 mV at 10 mA cm-2.On the other hand,the upshifted d-band center of Ir–CoSe2 facilitates the H2O adsorption and ensures the effective exposure of real active sites,resulting in good OER activity with an overpotential of 239 mV at 10 mA cm-2.Meanwhile,when using Ir–CoSe2 as catalysts for alkaline overall water splitting on both HER and OER,a lower voltage of 1.57 V at 10 mA cm-2 is achieved,indicating a good activity and great potential for practical water electrolysis.This work gives an effective method for the rational design of electrocatalysts with customized d-band structures for bifunctional catalysis. 展开更多
关键词 Water electrolysis Hydrogen evolution reaction Oxygen evolution reaction Iridium-doping Bifunctional catalysis
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Natural and artificial evolution of acetolactate synthase for crop breeding 认领 引用 被引量：3
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作者 Wenbo Pan Yaoyao Zhu +4 位作者 Pingdong Li Zhiqiang Li Chunjue Xu Man Jin Xiaoyan Tang 《The Crop Journal》 SCIE CSCD 2026年第1期95-106,共12页
Acetolactate synthase(ALS)-targeting herbicides are among the most widely used weed-control chemicals globally.Mutations in the ALS gene can confer herbicide resistance in crops,thereby allowing selective elimination ... Acetolactate synthase(ALS)-targeting herbicides are among the most widely used weed-control chemicals globally.Mutations in the ALS gene can confer herbicide resistance in crops,thereby allowing selective elimination of weeds without harming crops.Herbicide-resistant ALS alleles were initially discovered in weeds and subsequently developed through artificial mutagenesis techniques.With the advancement of CRISPR/Cas technologies,various genome-editing tools are now available to introduce these resistant alleles,as well as novel variants,into diverse crop species.Moreover,emerging methodologies,such as directed evolution,enable the generation and screening of large populations of random ALS mutants.Consequently,ALS has become one of the most extensively targeted genes in plant gene evolution.This paper provides a comprehensive overview of both conventional and recently developed strategies for ALS evolution,with particular emphasis on CRISPR/Cas-based genome editing and directed evolution.Future perspectives on technological application are also discussed.By advancing our understanding of herbicide-resistant ALS allele development for crop improvement,these methodologies may also pave the way for their application to the evolution of other agronomically important genes. 展开更多
关键词 Herbicide resistance Acetolactate synthase Genome editing Directed evolution
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Linking evolution of heterogeneous microstructure and rheology of granite to 1000℃ 认领 引用 被引量：4
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作者 Liyuan Liu Shengwen Luo +4 位作者 Derek Elsworth Kai Liu Yifan Luo Hongguang Ji Tao Wang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期1842-1857,共16页
The study of the effects of thermal damage on the mineral components,microstructure,and macroscopic physico-mechanical properties of rocks can provide valuable references for rock engineering design and long-term safe... The study of the effects of thermal damage on the mineral components,microstructure,and macroscopic physico-mechanical properties of rocks can provide valuable references for rock engineering design and long-term safety evaluations.In this work,we systematically study the evolution of microstructure and variations in the mechanical properties of granite under high-temperature conditions.The microstructural changes and macro-mechanical properties of rocks are investigated across a temperature range of 25℃–1000℃ through the application of characterization techniques,macro-mechanical experiments,and numerical simulations.High temperatures induce the gradual evolution of micropores and mesopores into macropores,culminating in a significant increase in porosity,with the most rapid rate of increase occurring at 400℃.The X-ray diffraction(XRD)results indicate that the high-temperature environment(below 1000℃)specifically affects the intensity of the maximum diffraction peaks and the half-height width(FWHM)of each mineral component in the granite.The scanning electron microscope(SEM)observation confirms the development of fracture and the reduction in cementation between mineral particles under different temperatures.Additionally,uniaxial and triaxial compression tests were conducted using the GCTS mechanical loading system.Experimental results reveal that the threshold temperature for granite damage is 400℃,and the temperature range for the brittle-ductile transition of granite lies roughly between 600℃ and 800℃.Numerical simulations were performed by employing non-homogeneous rock damage theory and a thermal-mechanical-damage coupling model.Simulated results align well with experimental data.Specifically,the simulations demonstrate that high-temperature treatment causes the redistribution of microstructure in granite,resulting in increased heterogeneity and a change in the failure morphology. 展开更多
关键词 High temperature treatment Thermal damage Microstructure evolution Thermal-mechanical-damage coupling Rock heterogeneity
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Advances of the bifunctional electrocatalyst toward oxygen reduction/evolution reaction 认领 引用 被引量：2
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作者 Yongxia Wang Shuang Li +7 位作者 Mengli Li Xi Luo Yang Zhang Xiangzhi Cui Guicheng Liu Woochul Yang Haitao Huang Jinli Qiao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期574-607,共34页
The development of economical,highly efficient,and stable bifunctional electrocatalysts for both the oxygen evolution reaction(OER)and the oxygen reduction reaction(ORR)remains a critical focus in advancing rechargeab... The development of economical,highly efficient,and stable bifunctional electrocatalysts for both the oxygen evolution reaction(OER)and the oxygen reduction reaction(ORR)remains a critical focus in advancing rechargeable metal-air battery systems.Significant progress has been made in the design of high-performance bifunctional electrocatalysts,the development of novel oxygen electrode architectures,and the in-depth understanding of electrocatalytic mechanisms through combined experimental and computational studies.This work provides a comprehensive review of recent advancements in design strategies for oxygen catalysts,including homogeneous electrodes,asymmetric electrodes,and biomimetic electrodes,are thoroughly discussed and summarized.Then,the advanced catalyst modification strategies for ORR/OER are summarized,focusing on critical factors such as enhancement effect of metalonmental and synergistic enhancement effect in multiple catalyst.Subsequently,a representative performance evaluation is presented,based on the reported oxygen electrodes used in rechargeable metal-air battery applications.By focusing on these key areas,the review outlines the current challenges and future prospects for the development of bifunctional oxygen electrocatalysts,aiming to guide the design of high-performance bifunctional electrocatalysts and to elucidate the underlying mechanisms involved. 展开更多
关键词 Oxygen reduction reaction Oxygen evolution reaction Design strategy Modification Rechargeable metal-air battery
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Oxygen radical coupling on asymmetric Ni-Co dual-sites induced by rare earth hydroxides for enhanced alkaline oxygen evolution reaction 认领 引用 被引量：2
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作者 Jiamin Zhu Shuhui Li +7 位作者 Yue Zhai Zejin Lin Jingzhi Yang Shanshan Wu Nan Zhang Li An Pinxian Xi Chun-Hua Yan 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第2期577-585,共9页
The reaction pathway plays a pivotal role in determining the catalytic activity of the oxygen evolution reaction(OER).However,regulating the microscopic reaction pathway through interface construction remains a signif... The reaction pathway plays a pivotal role in determining the catalytic activity of the oxygen evolution reaction(OER).However,regulating the microscopic reaction pathway through interface construction remains a significant challenge.In this study,an interface between amorphous rare earth hydroxides and crystalline spinel NiCo2O4was constructed via selective oxidation.The interface structural units accelerate reconstruction,leading to enhanced catalytic activity,which was observed by in situ Raman spectroscopy.The amorphous RE(OH)3(RE=Y and Eu)optimize asymmetric Ni-Co dual-sites,thereby altering the OER reaction pathway.Specifically,Y(OH)3/NiCo2O4operates through the lattice oxygen mechanism(LOM)at the expense of structural stability,whereas Eu(OH)3/NiCo2O4follows the oxygen pathway mechanism(OPM),preserving both catalytic activity and stability.This study offers a novel approach to controlling reaction pathways and proposes a new strategy for interface construction using rare earth hydroxides. 展开更多
关键词 Asymmetric dual-sites Mechanism regulation Spinel Rare earth hydroxides Oxygen evolution reaction
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Dynamic evolution of copper-based catalysts during CO2 electroreduction 认领 引用 被引量：3
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作者 Zhizheng Wu Pengpeng Yang Minrui Gao 《Nano Materials Science》 EI CAS CSCD 2026年第3期687-702,共16页
The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic cat... The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic catalyst capable of producing multicarbon products(C2+)with high current densities from the CO2RR,but it still suffers from the low activity and high overpotential.The challenge of sluggish CO2RR kinetics can be overcome by developing efficient Cu-based catalysts,which undergo the dynamic evolution during the reaction process.The dynamic evolution of the Cu-based catalysts taking place under working conditions makes it difficult to study the structure-activity correlation and reaction mechanism present during CO2RR.Recently,a number of important works have observed and revealed the dynamic evolution process of Cu-based catalysts by operando characterization techniques.This aspect,however,remains less summarized and prospected in the CO2RR literature.In this Review,we summarize the dynamic evolution of Cu-based catalysts during the CO2RR from aspects of structure,composition and oxidation state.We highlight the correlations between evolution behaviors and catalytic properties.Then,we discuss the dynamic deactivation process of Cu-based catalysts during CO2RR,including metal impurities contamination and carbon accumulation.In particular,we introduce recent advancements in in situ characterization techniques those are employed to probe the dynamic evolution under operating conditions.We end the Review by outlining the challenges and offering personal perspectives on the future development opportunities in this field. 展开更多
关键词 Copper-based catalysts CO2electroreduction reaction Dynamic evolution
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Bearing capacity,shear band evolution,and deformation characteristics of slopes reinforced by root-inspired anchors using transparent soil model testing 认领 引用 被引量：2
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作者 Ruijie Huang Wengang Zhang +6 位作者 Jiaying Xiang Ningning Zhang Matteo Oryem Ciantia Jian Yin Leilei Liu Jushan Wang Anzhai Fei 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第1期457-471,共15页
Root-inspired anchorage systems in the field of bio-inspired geotechnics are renowned for enhancing the pullout capacity of traditional geotechnical anchorage systems by simulating the morphology and architecture of p... Root-inspired anchorage systems in the field of bio-inspired geotechnics are renowned for enhancing the pullout capacity of traditional geotechnical anchorage systems by simulating the morphology and architecture of plant root systems.However,limited studies have explored their practical applications,particularly in improving slope stability.To fill this gap,this study investigates the reinforcement effect of root-inspired anchors on slope stabilization using transparent soil modeling and 3D-printed anchors,and examines the impact of anchor branching patterns(i.e.branching numbers,branching angle,and branching nodes)on slope bearing capacity,shear band evolution,and temporal and spatial variation of slope deformation.The results show that peak slope bearing capacity increases with branching numbers and branching angles,correlating with the envelope area of the curved shear band.Upper anchors result in step-like deflections in the shear band near the trailing edge,while lower anchors convert the upward concave shear band into an upward convex one,thus increasing the slope bearing capacity.Slope deformation is minimized with intermediate branching parameters,such as a branching number of 4 and a branching angle of 45°.The anchor reinforcement mechanisms,i.e.anchor rod shear resistance,interface friction,anchor pullout capacity,and plate tightening effects,are comprehensively discussed,and the installation effects resulting from compromise slope modeling are identified as the contributors.These findings shed light on the failure process of root-inspired anchors reinforced slopes and provide a preliminary reference for potential applications,especially for the tradeoff between anchor branching,slope deformation,and slope stability. 展开更多
关键词 Bio-inspired geotechnics Root-inspired anchors Transparent cemented soil Slope bearing capacity Shear band evolution
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