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Evapotranspiration and its components partitioning based on an improved hydrological model: historical attributions and future projections

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Journal of Earth Science 2025年

作者： Hong Du Sidong Zeng Yongyue Ji jun xia College of Resources and Environmental Science， South-Central Minzu University Chongqing Institute of Green and Intelligent Technology， Chinese Academy of Sciences Chongqing School， University of Chinese Academy of Sciences State Key Laboratory of Water Resources and Hydropower Engineering Science， Wuhan University

Estimation and attribution of evapotranspiration （ET） and its components under changing environment is still a challenge but is essential for understanding the mechanisms of water and energy transfer subsequently regional water resources management. In this study， an improved hydrological model is developed to estimate evapotranspiration and its components i.e.， evaporation （E） and transpiration （T） by integrated the advantages of hydrological modeling constrained by water balance and the water-carbon close relationships. Results show that the improved hydrological model could captures ET and its components well in the study region. During the past years， annual ET and E increase obviously about 2.40mm/a and 1.42mm/a， particularly in spring and summer accounting for 90%. T shows less increasement and mainly increases in spring while it decreases in summer. Precipitation is the dominant factor and contributes 74.1% and 90.0% increases of annual ET and E， while the attribution of T changes is more complex by coupling of the positive effects of precipitation， rising temperature and interactive influences， the negative effects of solar diming and elevated CO2. In the future， ET and its components tend to increase under most of the Shared Socioeconomic Pathways （SSP） scenarios except for T decreases under the very high emissions scenario （SSP5-8.5） based on the projections. From seasonal perspective， the changes of ET and the components are mainly in spring and summer accounting for 75%， while more slightly changes are found in autumn and winter. This study highlights the effectiveness of estimating ET and its components by improving hydrological model within water-carbon coupling relationships， and more complex mechanisms of transpiration changes than evapotranspiration and evaporation changes under the interactive effects of climate variability and vegetation dynamics. Besides， decision makers should pay attention to the more increases in the undesirable E than desirab

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Wetland and habitat dynamics in the evolving landscape of the Middle Yangtze River Basin

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Journal of Geographical Sciences 2025年第1期35卷 88-111页

作者： YANG Peng SUN Kaiya ZHU Yanchao xia.jun HUANG Heqing SONG Jingxia SHI xiaorui LU Xixi Hubei Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information Engineering China University of Geosciences Department of Geography National University of Singapore State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

Wetlands play a critical role in the global environment. The Middle Yangtze River Basin(MYRB), known for its abundant wetland resources, has experienced notable changes resulting from the complex interplay of environmental factors. Therefore, we investigated the spatiotemporal characteristics of wetland ecological quality in the MYRB from 2001 to *** the random forest(RF) regression algorithm and patch-generated land-use simulation(PLUS) model, we forecasted variations in wetland habitat quality and their determinants under the Shared Socioeconomic Pathway-Representative Concentration Pathway(SSPRCP) framework from 2035 to 2095. The main findings are as follows:(1) The RF algorithm was optimal for land-use and land-cover(LULC) classification in the MYRB from 2001 to 2020,when notable changes were observed in water bodies and buildings. However, the forested area exhibited an increase and decrease of 3.9% and 1.2% under the SSP1-2.6 and SSP5-8.5 scenarios, respectively, whereas farmland exhibited a diminishing trend.(2) Wetlands were primarily concentrated in the central and eastern MYRB, with counties in the southwest exhibiting superior ecological-environmental quality from 2001 to 2020. Notably,wetland coverage revealed significantly high level, significant changes, frequent but relatively minor changes under the SSP1-2.6, SSP2-4.5, and SSP 5-8.5 scenarios, respectively.(3)Regions with lower habitat quality were primarily concentrated in urbanized areas characterized by frequent human activities, indicating a clear degradation in habitat quality across different scenarios. In conclusion, we established a foundational framework for future investigations into the eco-hydrological processes and ecosystem quality of watersheds.

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Stable copper boron–imidazolate cage as Cu-riched enzyme for highly efficient electrocatalytic CO2 reduction to ethylene

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Science China Chemistry 2025年

作者： jun-Qiang Chen Qiao-Hong Li Qin-Long Hong Ping Shao Hai-xia Zhang Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Single-atom catalyst has garnered widespread attention to mimic mature enzymes due to its well-defined atomic structure and coordination environments. However, since the carbon–carbon（C–C） coupling reactions require synergistic catalysis of multiple sites, single-atom catalysts suffer from insufficient active sites and unclear reaction mechanisms. Controlling the reaction intermediates in a precisely targeted pocket through careful metal–organic cage design is therefore crucial. Here, we prepare a tetrahedral [Cu6L4]-type boron–imidazolate cage integrating highly active Cu sites and optimized cavity, which exhibits enzyme like specific catalytic performance in electrochemical CO2reduction reaction（CO2RR） to enhance the selectivity of *** analyses and computational calculations suggest that the single Cu site together with neighboring boron–imidazolate ligands provides suitably synergistic effects that enable the energetically favorable formation of an *COCHO intermediate, a key step determining selectivity. As a result, the [Cu6L4]-type cage of BIC-145 achieves a Faradaic efficiency of 28% for C2H4maintaining an average current density of -3.54 mA cm-2over a 5-hour electrolysis period. This work represents the first example for studying single-metal site catalysts with ultra-low coordination numbers through the rational design of metal–organic cages.

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A new era of flood control strategies from the perspective of managing the 2020 Yangtze River flood

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Science China Earth Sciences 2021年第1期64卷 1-9页

作者： jun xia Jin CHEN State Key Laboratory of Water Resources and Hydropower Engineering Sciences Wuhan UniversityWuhan 430072China Wuhan University Yangtze River Academy of SciencesChangjiang Water Resources Commission of the Ministry of Water ResourcesWuhan 430015China

Flood control of the Yangtze River is an important part of China’s national water *** July 2020,due to continuous heavy rainfall,the water levels along the middle-lower reaches of the Yangtze River and major lakes constantly exceeded the warning levels,in which Taihu Lake exceeded its highest safety water level and some stations of Poyang Lake reached their highest water levels in its *** August 2020,another huge flood occurred in the Minjiang River and the Jialing River in the upper Yangtze River,and some areas of Chongqing Municipality and other cities along the rivers were inundated,resulting in great pressure on flood control and high disaster *** 2020 Yangtze River flood has received extensive media coverage and raised concerns on the roles of the Three Gorges Dam and other large reservoirs in flood *** we analyze the changes in the pattern of the Yangtze River flood control by comparing the strategies to tackle the three heavy floods occurring in 1954,1998,and *** propose that the overall strategy of the Yangtze River flood control in the new era should adhere to the principle of"Integration of storage and drainage over the entire Yangtze River Basin,with draining floods downstream as the first priority"by using both engineering and non-engineering *** the basis of embankments,the engineering measures should use the Three Gorges Dam and other large reservoirs as the major regulatory means,promote the construction of key flood detention areas,keep the floodways clear,and maintain the ecosystem services of wetlands and *** terms of non-engineering measures,we should strengthen adaptive flood risk management under climate change,standardize the use of lands in flood detention areas,give space to floods,and promote the implementation of flood risk maps and flood insurance *** ultimate goal of this new flood control system is to enhance the adaptability to frequent floods and increase the resilience to extre

关键词： The 2020 Yangtze River flood Yangtze River Flood Control System Three Gorges Dam Protection of wetlands and shoals Non-engineering measures

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Pretreating and normalizing metabolomics data for statistical analysis

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Genes & Diseases 2024年第3期11卷 188-205页

作者： jun Sun Yinglin xia Division of Gastroenterology and Hepatology Department of MedicineDepartment of Microbiology/ImmunologyUIC Cancer CenterUniversity of Illinois ChicagoJesse Brown VA Medical Center Chicago(537)ChicagoIL 60612USA Division of Gastroenterology and Hepatology Department of MedicineUniversity of Illinois ChicagoChicagoIL 60612USA

Metabolomics as a research field and a set of techniques is to study the entire small molecules in biological *** is emerging as a powerful tool generally for pre-cision ***,integration of microbiome and metabolome has revealed the mechanism and functionality of microbiome in human health and ***,metabo-lomics data are very ***/pretreating and normalizing procedures on metabolomics data are usually required before statistical *** this review article,we comprehensively review various methods that are used to preprocess and pretreat metabolo-mics data,including MS-based data and NMR-based data preprocessing,dealing with zero and/or missing values and detecting outliers,data normalization,data centering and scaling,data *** discuss the advantages and limitations of each *** choice for a suitable preprocessing method is determined by the biological hypothesis,the characteristics of the data set,and the selected statistical data analysis *** then provide the perspective of their applications in the microbiome and metabolome research.

关键词： Data centering and scaling Data normalization Data transformation Missing values MS-Baseddata preprocessing NMRData preprocessing Outliers Preprocessing/pretreatment

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Thermal Transport through Solid-Liquid Interface:Effect of the Interfacial Coupling and Nanostructured Surfaces

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Journal of Thermal Science 2022年第4期31卷 1167-1179页

作者： LI Haiyang WANG jun xia Guodong MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation Beijing Key Laboratory of Heat Transfer and Energy Conversion Beijing University of TechnologyBeijing 100124China

The solid-liquid interfacial thermal transport depends on the physical properties of the interfaces,which have been studied extensively in open ***,the fundamental understanding on the mechanism of the solid-liquid interfacial thermal transport is far from *** the present paper,heat transfer through solid-liquid interfaces is studied based on the non-equilibrium molecular dynamics *** is shown that the interfacial heat transfer can be enhanced by increasing interfacial coupling strength or introducing the nanostructured *** underlying mechanism of the interfacial thermal transport is analyzed based on the calculation results of the heat flux distribution,potential mean force,and the vibrational density of states at the interfacial *** is found that the interfacial thermal transport is dominated by the kinetic and virial contributions in the interface *** enhancement of the interfacial heat transfer can be attributed to the fluid adsorption on the solid surface under a strong interfacial interaction or by the nanostructured solid surfaces,which reduce the mismatch of the vibrational density of states at the solid-liquid interface region.

关键词： solid-liquid interface molecular dynamics simulation thermal resistance nanostructure

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Strong Embeddability for Groups Acting on Metric Spaces

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Chinese Annals of Mathematics,Series B 2019年第2期40卷 199-212页

作者： jun xia xianjin WANG College of Mathematics and Statistics Chongqing University

The strong embeddability is a notion of metric geometry, which is an intermediate property lying between coarse embeddability and property A. In this paper, the permanence properties of strong embeddability for groups acting on metric spaces are studied. The authors show that a finitely generated group acting on a finitely asymptotic dimension metric space by isometries whose K-stabilizers are strongly embeddable is strongly embeddable. Moreover, they prove that the fundamental group of a graph of groups with strongly embeddable vertex groups is also strongly embeddable.

关键词： Strong embeddability Groups action Graph of groups Relative hyperbolic groups

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工业智能化、要素流动与制造业创新——来自中国283个城市的经验证据

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山西师大学报（社会科学版） 2025年第1期52卷 45-57页

作者：宁楠刘俊霞西北大学经济管理学院西安710127 西安翻译学院国际商学院西安710105

提升制造业创新能力是新质生产力发展题中应有之义。基于283个地级市数据,实证分析了工业智能化及其与要素流动协同助推制造业创新的效应及多元化特征。研究发现,工业智能化推动了制造业创新,作用效果受制造业就业规模与城市规模的正向... 详细信息

提升制造业创新能力是新质生产力发展题中应有之义。基于283个地级市数据,实证分析了工业智能化及其与要素流动协同助推制造业创新的效应及多元化特征。研究发现,工业智能化推动了制造业创新,作用效果受制造业就业规模与城市规模的正向调节,且在非资源型城市、工业占比较低和老龄化程度较低的城市中表现更强。与要素流动的协同及其空间溢出是工业智能化驱动制造业创新的两大重要机制,并且主要依赖于资本和高技能劳动力要素流动。进一步分析发现,要素流动与工业智能化的协同联动对制造业创新的空间溢出在东部地区表现为“以邻为伴”,在中西部地区则表现为“以邻为壑”。因此,要加快智能化转型,充分发挥工业智能化的要素配置作用,共同推动提升城市制造业创新效能。

关键词：工业智能化要素流动制造业创新空间溢出

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FORCES ON A NEAR-WALL CIRCULAR CYLINDER

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Journal of Hydrodynamics 2004年第6期16卷 658-664页

作者： ZHANJing-xia WANGJin-jun ZHANGPang-feng FluidMechanicsInstitute BeijingUniversityofAeronauticsandAstronauticsBeijing100083China

The pressure distribution around a near-wall smooth circular cylinder incross-flow was mainly investigated. The experiment was conducted at the sub-critical Reynolds numberranging from 2. 24 · 10~4 to 8. 94 · 10~4, at which the regular vortex separation exists on anisolated circular cylinder. The experimental results indicate that the forces on a circular cylindernear a plane wall are different from those on an isolated circular cylinder. Drag and liftcoefficients of a near-wall circular cylinder strongly depend on gap ratio. The increase of gapratio results in the increase of drag coefficient and the declination of lift coefficient, dragcoefficient ranges from 0. 5 to 1. 0, and lift coefficient from 0. 25 to 0 when gap ratio graduallyincreases from 0 to 1. 0, and then the forces tend to be nearly constant with the increase of gapratio. The attraction between a cylinder and a plane wall, i. e. , downward force, occurs when gapratio lies in certain range. The existence of cylinder changes the pressure gradient on the planewall, and the influence extends to the location where x/D 5. 0 .

关键词： gap ratio static pressure coefficient distribu-tiontlift coefficient dragcoefficient

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On Strong Embeddability and Finite Decomposition Complexity

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Acta Mathematica Sinica,English Series 2017年第3期33卷 403-418页

作者： jun xia xian Jin WANG College of Mathematics and Statistics Chongqing University Chongqing 401331 P. R. China

The strong embeddability is a notion of metric geometry, which is an intermediate property lying between coarse embeddability and property A. In this paper, we study the permanence properties of strong embeddability for metric spaces. We show that strong embeddability is coarsely invariant and it is closed under taking subspaces, direct products, direct limits and finite unions. Furthermore, we show that a metric space is strongly embeddable if and only if it has weak finite decomposition complexity with respect to strong embeddability.

关键词： Metric geometry strong embeddability coarse invariance permanence properties finitedecomposition complexity

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