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Intercity Mobility and Coupled Landscapes of Multidimensional Regionalization in Western China 认领 引用 被引量：1
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作者 JIANG Fanrong LI Tao LI Jiyuan 《Chinese Geographical Science》 SCIE CSCD 2025年第2期384-400,共17页
Intercity mobility lays the foundation for capital flow,information flow,and knowledge flow,etc.,and is important for promoting regional integration.Although many scholars have studied intercity mobility in extensive ... Intercity mobility lays the foundation for capital flow,information flow,and knowledge flow,etc.,and is important for promoting regional integration.Although many scholars have studied intercity mobility in extensive well-developed urban agglomerations,few studies have examined the characteristics of intercity mobility at the county level and its impact on regionalization in western China.This study takes the Guanzhong Plain urban agglomeration(GPUA)as a case to study the geographical law of intercity mobility and then explore its impact on regionalization.The results obtained show that intercity mobility network exhibits a hub and spoke patterns focusing on major municipal districts at the county level.We also found a corridor effect that counties with higher travel volumes are mostly located along the trunk high speed railway(HSR)lines.Unlike previous studies,the distribution of intercity mobility is more concentrated than that of population and exhibits a super-linear behavior rule.There are the differences in gravity law for overall trips,weekday trips,weekend trips,and holiday trips.With the decrease of travel duration,the effect of attraction of destination is weakening,but the influence of distance decay is increasing.Finally,the spatial organization is still administrative-centric and is dominated by intraprefecture and intra-provincial development.Moreover,the coupled degree between network-based regionalization and attribute-based regionalization shows a decreasing trend from administrative via cultural to physical factors.These findings enrich the research on the intercity mobility and the regionalization in inland developing urban agglomerations. 展开更多
关键词 intercity mobility regionalization gravity law Guanzhong Plain urban agglomeration(GPUA),China
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Sources and environmental risks of cadmium in soils affected by high geochemical background and artisanal zinc smelting activities 认领 引用 被引量：1
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作者 Chao Luo Wangwang Zhou +3 位作者 Yizhang Liu Jian Long Zengping Ning Chengshuai Liu 《Acta Geochimica》 EI CAS CSCD 2026年第2期242-255,共14页
Soil cadmium(Cd)pollution is a global environmental issue of significant concern.In southwestern China,soil Cd content is notably influenced by high geochemical background and mining/smelting activities.However,the sp... Soil cadmium(Cd)pollution is a global environmental issue of significant concern.In southwestern China,soil Cd content is notably influenced by high geochemical background and mining/smelting activities.However,the specific contributions of these Cd sources to Cd enrichment and environmental risks in soils remain poorly understood.Therefore,this study investigated the total and bioavailable Cd and other metals in the topsoil and subsoils surrounding Caohai Lake in northwestern Guizhou Province.This research aimed to identify Cd sources,assess pollution characteristics,and evaluate the potential environmental risks.The results revealed that the carbonate bedrock has average Cd content of 0.66 mg/kg,confirming a naturally high geochemical background of Cd in the study area.Soil Cd content ranged from 0.14 to 6.69 mg/kg,with topsoil exhibiting higher average Cd content(2.29 mg/kg)than subsoil(0.71 mg/kg).Statistical analyses indicated that Cd in subsoil is primarily of geogenic origin.In contrast,approximately 87%of the total Cd in topsoil originates from atmospheric deposition linked to historical artisanal zinc smelting activities.The study found that Cd in topsoil reaches a moderate pollution level and poses a high potential ecological risk.Furthermore,the proportion of bioavailable Cd(DTPAextractable)was significantly higher in topsoil(26%)than in subsoil(13%).This elevated Cd bioavailability in topsoil is attributed to atmospheric Cd deposition,lower soil pH,and higher organic matter content.These findings provide critical insights for managing Cd risks in soils from regions with high geochemical backgrounds and smelting activities. 展开更多
关键词 Karst region Soil pollution Caohai Lake Heavy metals Bioavailability
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Explosive PM2.5growth and health effects during extreme haze in Shanghai,China:Insights from surface and vertical observations 认领 引用 被引量：1
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作者 Wenwen Sun Yang Chen +6 位作者 Shunyao Wang Shenghua Zhang Yuxin Zhang Rui Li Jialiang Feng Jianyu Chen Tiantao Cheng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期666-675,共10页
Vertical observations were used to explore the explosive growth(EG)of PM2.5in Shanghai in 2018 to investigate the rapid evolutionary mechanisms and health effects of a highly severe haze episode.The EG is defined a... Vertical observations were used to explore the explosive growth(EG)of PM2.5in Shanghai in 2018 to investigate the rapid evolutionary mechanisms and health effects of a highly severe haze episode.The EG is defined as the net increase in PM2.5concentration by more than 100μg/m3within 6 or 9 h.The average PM2.5concentration during EG was 118.1μg/m3,dominated by NO3-,NH4+,SO42-(SNA),and organic matter(OM),with a proportion of 31.1%,15.1%,14.8%,and 18.8%,respectively.In addition to being affected by chemical reactions,regional transport was the main influencing factor for OM,but local emissions were the main factor for SNA.Vertical observation results showed that EG events were influenced commonly by local emission,regional transport,and chemical reactions with a different proportion.Moreover,the heterogeneous reaction could possibly cause more severe pollution.The daily average nonaccidental mortality for EG[13.9(95%CI:5.5,25.0)]was about 4.0 times higher than that in Clean Days(CDs)[3.5(1.4,6.3)],and EG episodes caused a more severe effect on cardiovascular disease compared with respiratory disease.Moreover,local emissions and secondary gas-phase oxidation exhibited crucial factors for human health during EG,but regional transport during CDs.To sum up,ground-level observation could not fully explain the process of atmospheric pollution,but the vertical measurements help to understand the regional transport influence on the EG process.In the future,it is recommended that vertical observation should play a vital role in investigating regional heavy pollution episodes. 展开更多
关键词 Explosive growth PM(2.5) Formation mechanism Health risks Vertical observation Regional transport
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Bypassing Typhoons Cause Three-dimensional Dramatic Changes in Temperature and Ocean Heat Content of the Yellow Sea and Bohai Sea:A Case Study with Super Typhoon Maysak(2020) 认领 引用 被引量：1
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作者 Fangguo ZHAI Junyan ZHANG +4 位作者 Yucheng WANG Yujie DONG Yanping MA Cong LIU Zizhou LIU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第3期591-611,共21页
The Yellow Sea and Bohai Sea are among the global shelf seas susceptible to typhoons every year.Using observations and high-resolution numerical simulations,the current study investigates the dramatic changes in tempe... The Yellow Sea and Bohai Sea are among the global shelf seas susceptible to typhoons every year.Using observations and high-resolution numerical simulations,the current study investigates the dramatic changes in temperature and ocean heat content(OHC)of the Yellow Sea and Bohai Sea caused by Super Typhoon Maysak in early September 2020,which is representative of northwardortheastward-bypassing typhoons with centers just to the east of the study area.Temperature shows spatially coherent cooling in the upper mixed layer but warming in the subsurface layer in the majority of the offshore waters,due to wind-enhanced vertical mixing.In lower layers from the thermocline to sea bottom,temperature experiences significant warming in northeastern coastal waters of the Shandong Peninsula and in regions just off the Subei Shoal,but significant cooling in western coastal waters of the Korean Peninsula and southern coastal waters of the Shandong Peninsula.Significant temperature warming/cooling in lower layers is caused by coastal downwelling/upwelling.The total OHC of the study area decreases rapidly during Typhoon Maysak(2020)’s passage,which is generated comparably by latent heat loss at the sea surface and southward heat advection out of the study area at the southern boundary.Reduced shortwave radiation contributes positively but secondarily to the decreasing OHC during the first day.A numerical experiment suggests that Typhoon Maysak(2020)-induced OHC decline could have greatly affected the regional climate evolution in the following seasons.More studies are needed to fully understand the impacts of typhoons on regional climate changes in shelf seas at different time scales. 展开更多
关键词 shelf sea dynamics typhoon ocean heat content overturning currents regional climate change
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Differences in drought effects on carbon fluxes in vegetation in arid and humid regions 认领 引用 被引量：1
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作者 Danna Chen Daodao Pan +1 位作者 Enbin Liu Xiaojun Xu 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第1期78-97,共20页
Drought influences carbon fixation by plants.Therefore,elucidating its impact on carbon fluxes in plants at the ecosystem level is crucial for assessing their role in mitigating climate change.Using carbon fluxes and ... Drought influences carbon fixation by plants.Therefore,elucidating its impact on carbon fluxes in plants at the ecosystem level is crucial for assessing their role in mitigating climate change.Using carbon fluxes and environmental factor data from FLUXNET sites,we analyzed the influence of drought on carbon fluxes,their drivers,time-lag effects,and recovery times across various climatic regions and seasons.Results showed drought significantly decreased gross primary production(GPP),ecosystem respiration,and net ecosystem productivity in arid regions but slightly increased carbon sequestration in humid regions.Summer droughts negatively affected vegetation carbon fluxes,partly offset by the positive impact of spring droughts.Nonforest carbon fluxes were more susceptible to drought effects than forest fluxes.Soil water content(SWC)was the main influence on changes in arid regions,whereas vapor pressure deficit(VPD)dominated humid regions.Decreased SWC and increased VPD reduced carbon sequestration in arid regions but increased it in humid regions.Increased VPD reduced GPP,leading to forest carbon loss,whereas decreased SWC reduced GPP,leading to nonforest carbon loss.The lag time of the drought effects on carbon fluxes was longer in humid regions(19.44 d)than in arid regions(14.71 d).Compared to nonforest areas(16.74 d and 57 d for drought lag and recovery time,respectively),forest areas had a longer lag(18.81 d)and recovery time(92 d).The findings revealed discrepancies in the main factors regulating vegetation carbon fluxes during droughts between arid and humid regions and between forest and nonforest ecosystems.These insights provide a new perspective on understanding and simulating carbon-climate feedback.Enhancing ecosystem diversity is a feasible measure to increase drought resistance. 展开更多
关键词 Carbon sequestration Regulatory factor Drought lag time Recovery time Climatic regions
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Integrating wind field analysis in UAV path planning:Enhancing safety and energy efficiency for urban logistics 认领 引用 被引量：3
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作者 Ruijia GU Yifei ZHAO Xinhui REN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期508-533,共26页
Shenzhen,a major city in southern China,has experienced rapid advancements in Unmanned Aerial Vehicle(UAV)technology,resulting in extensive logistics networks with thousands of daily flights.However,frequent disruptio... Shenzhen,a major city in southern China,has experienced rapid advancements in Unmanned Aerial Vehicle(UAV)technology,resulting in extensive logistics networks with thousands of daily flights.However,frequent disruptions due to its subtropical monsoon climate,including typhoons and gusty winds,present ongoing challenges.Despite the growing focus on operational costs and third-party risks,research on low-altitude urban wind fields remains scarce.This study addresses this gap by integrating wind field analysis into UAV path planning,introducing key innovations to the classical model.First,UAV wind resistance and turbulence constraints are analyzed,mapping high-wind-speed and turbulence-prone zones in the airspace.Second,wind dynamics are incorporated into path planning by considering airspeed and groundspeed variation,optimizing waypoint selection and flight speed adjustments to improve overall energy efficiency.Additionally,a wind-aware Theta*algorithm is proposed,leveraging wind vectors to expedite search process,while Computational Fluid Dynamics(CFD)techniques are employed to calculate wind fields.A case study of Shenzhen,examining wind patterns over the past decade,demonstrates a 6.23%improvement in groundspeed and a 7.69%reduction in energy consumption compared to wind-agnostic models.This framework advances UAV logistics by enhancing route safety and energy efficiency,contributing to more cost-effective operations. 展开更多
关键词 Drone logistics Energy consumption Hazardous field region Path planning Unmanned aerial vehicle(UAV) Urban wind fields
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Assessment of Coastal Socio-economic Exposure Under the Impact of Future Typhoons Landing in China 认领 引用 被引量：2
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作者 LI Cuihua CAI Rongshuo TAN Hongjian 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第1期50-63,共14页
China’s coastal regions,characterized by dense populations and industrial agglomeration,face escalating threats from typhoon disasters.Understanding the evolution of socio-economic exposure to future typhoon landfall... China’s coastal regions,characterized by dense populations and industrial agglomeration,face escalating threats from typhoon disasters.Understanding the evolution of socio-economic exposure to future typhoon landfalls under global change is critical for effective disaster risk management.This study utilizes future typhoon track data simulated by the regional climate model version 4(RegCM4),combined with projected population and Gross Domestic Product(GDP)data for China’s coastal regions under three Shared Socioeconomic Pathways(SSPs:SSP1,sustainability;SSP2,middle of the road;SSP5,fossil-fueled development).We analyze typhoon impact zones for future periods(2030s,2050s,and 2090s)under Representative Concentration Pathways(RCPs:RCP2.6,RCP4.5,and RCP8.5,representing low,medium,and high greenhouse gas emission scenarios,respectively).Exposure levels for 2030,2050,and 2100 are calculated based on the annual average frequency of typhoon impacts during these periods,aiming to quantify the distribution characteristics of typhoon-affected population and GDP in China’s coastal regions.Key findings reveal two high-frequency typhoon im-pact zones:the Taiwan Strait region and the northern Qiongzhou Strait region.Furthermore,under RCP2.6,typhoon impacts may ex-tend to Liaoning,while RCP4.5 and RCP8.5 scenarios indicate potential impacts reaching further north to Heilongjiang.Under RCP4.5,Northeast China will experience the largest typhoon-affected area(43.800×104 km2)by the 2030s.High population and GDP exposure concentrates in the Yangtze River Delta,the Pearl River Delta,and the Taiwan Strait coastal areas.Notably,Liaoning’s cumulative ex-posed population may exceed 0.100×108 by 2030 and 2050 under RCP4.5 and RCP8.5 due to typhoon track migration.Given China’s location within the Western Pacific typhoon high-incidence region,the northward expansion of impacts will substantially escalate socio-economic exposure in mid-latitude regions previously at lower risk.These findings underscore the imperative for enhanced disaster pre-vention,mitigation strategies and targeted countermeasure research. 展开更多
关键词 typhoon coastal regions socio-economic exposure disaster prevention China
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A radiomics approach for predicting gait freezing in Parkinson's disease based on resting-state functional magnetic resonance imaging indices:A cross-sectional study 认领 引用 被引量：3
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作者 Miaoran Guo Hu Liu +6 位作者 Long Gao Hongmei Yu Yan Ren Yingmei Li Huaguang Yang Chenghao Cao Guoguang Fan 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第4期1621-1627,共7页
Freezing of gait is a significant and debilitating motor symptom often observed in individuals with Parkinson's disease.Resting-state functional magnetic resonance imaging,along with its multi-level feature indice... Freezing of gait is a significant and debilitating motor symptom often observed in individuals with Parkinson's disease.Resting-state functional magnetic resonance imaging,along with its multi-level feature indices,has provided a fresh perspective and valuable insight into the study of freezing of gait in Parkinson's disease.It has been revealed that Parkinson's disease is accompanied by widespread irregularities in inherent brain network activity.However,the effective integration of the multi-level indices of resting-state functional magnetic resonance imaging into clinical settings for the diagnosis of freezing of gait in Parkinson's disease remains a challenge.Although previous studies have demonstrated that radiomics can extract optimal features as biomarkers to identify or predict diseases,a knowledge gap still exists in the field of freezing of gait in Parkinson's disease.This cross-sectional study aimed to evaluate the ability of radiomics features based on multi-level indices of resting-state functional magnetic resonance imaging,along with clinical features,to distinguish between Parkinson's disease patients with and without freezing of gait.We recruited 28 patients with Parkinson's disease who had freezing of gait(15 men and 13 women,average age 63 years)and 30 patients with Parkinson's disease who had no freezing of gait(16 men and 14 women,average age 64 years).Magnetic resonance imaging scans were obtained using a 3.0T scanner to extract the mean amplitude of low-frequency fluctuations,mean regional homogeneity,and degree centrality.Neurological and clinical characteristics were also evaluated.We used the least absolute shrinkage and selection operator algorithm to extract features and established feedforward neural network models based solely on resting-state functional magnetic resonance imaging indicators.We then performed predictive analysis of three distinct groups based on resting-state functional magnetic resonance imaging indicators indicators combined with clinical features.Subsequently,we conducted 100 additional five-fold cross-validations to determine the most effective model for each classification task and evaluated the performance of the model using the area under the receiver operating characteristic curve.The results showed that when differentiating patients with Parkinson's disease who had freezing of gait from those who did not have freezing of gait,or from healthy controls,the models using only the mean regional homogeneity values achieved the highest area under the receiver operating characteristic curve values of 0.750(with an accuracy of 70.9%)and 0.759(with an accuracy of 65.3%),respectively.When classifying patients with Parkinson's disease who had freezing of gait from those who had no freezing of gait,the model using the mean amplitude of low-frequency fluctuation values combined with two clinical features achieved the highest area under the receiver operating characteristic curve of 0.847(with an accuracy of 74.3%).The most significant features for patients with Parkinson's disease who had freezing of gait were amplitude of low-frequency fluctuation alterations in the left parahippocampal gyrus and two clinical characteristics:Montreal Cognitive Assessment and Hamilton Depression Scale scores.Our findings suggest that radiomics features derived from resting-state functional magnetic resonance imaging indices and clinical information can serve as valuable indices for the identification of freezing of gait in Parkinson's disease. 展开更多
关键词 amplitude of low-frequency fluctuation degree centrality feedforward neural network freezing of gait machine learning parahippocampal gyrus Parkinson's disease receiver operating characteristic regional homogeneity resting-state functional magnetic resonance imaging
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Heterogeneity Performance of Cross-border Development Under the Influence of High-speed Rail Flow and Information Flow in Yangtze River Delta Region,China 认领 引用 被引量：1
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作者 DUAN Wei WANG Shaobo +1 位作者 ZHOU Yutao WANG Xinyu 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第3期524-540,共17页
In the knowledge economy era,the rapid flow channels represented by high-speed rail(HSR)and online information flow promote cross-border development between cities.This study constructed a conceptual model of cross-bo... In the knowledge economy era,the rapid flow channels represented by high-speed rail(HSR)and online information flow promote cross-border development between cities.This study constructed a conceptual model of cross-border development from the perspective of flow space.Taking the Yangtze River Delta Region(YRDR),China,as a case study,we apply the Speaker-listener Label Propagation Algorithm(SLPA)to detect the heterogeneity patterns of cross-border development shaped by HSR flow and information flow in 2021.Results show that cross-border development among cities is more evident under information flows compared to HSR flow.Furthermore,intra-provincial cross-border development predominates under HSR flow,whereas inter-provincial cross-border development is more frequent under in-formation flow.Additionally,information flow leads to more shared or competitive nodes in cross-border development across different communities.In the future,leveraging these nodes'intermediary role will be the key to driving the next phase of regional integration.This research will enhance and broaden the theoretical frameworks for cross-border integrated development,flow space,and regional coordinated development. 展开更多
关键词 flow space cross-border development high-speed rail(HSR)flow information flow Yangtze River Delta Region(YRDR),China
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Nonlinear response of China’s eco-geographical arid/humid regions to climate change during 1961–2020 认领 引用
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作者 YIN Mijia YIN Yunhe +2 位作者 DENG Haoyu WU Shaohong ZHENG Du 《Journal of Geographical Sciences》 SCIE CSCD 2026年第3期535-549,共15页
Climate change significantly affects the arid/humid processes and patterns in China,directly impacting management decisions related to adaptive agriculture and water resources management,desertification control,and sp... Climate change significantly affects the arid/humid processes and patterns in China,directly impacting management decisions related to adaptive agriculture and water resources management,desertification control,and spatial ecological restoration.However,current studies primarily focus on changes in arid/humid climate variables,lacking quantitative characterization of the dynamic evolution of areal systems and their nonlinear responses.Based on the data of national meteorological stations from 1961 to 2020,we systematically quantified the nonlinear response of arid/humid patterns to climate change.The results revealed that 6.98%of eco-geographical arid/humid regions underwent type shifts over the past six decades,with 4.95%transitioning toward wetter conditions.Humid and semi-arid regions expanded significantly while sub-humid and arid regions contracted significantly.In the late 1990s,trends of the humid and sub-humid region shifted.Humid region contraction in northern China was driven primarily by precipitation decline,whereas the Tibetan Plateau responded to increasing potential evapotranspiration.During the same period,the retreat rate of the arid region slowed,linked to intensified aridification in the west part of northern China and a decelerating wetting trend in northwest China,both primarily driven by precipitation trends.Our study reveals the nonlinear response of the arid/humid patterns under climate change,providing a scientific basis for the improvement of regional climate resilience. 展开更多
关键词 ecogeography arid/humid regions aridity index climate change regional pattern dynamics
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电力系统节点电压-无功安全域的构建与可视化 认领 引用 被引量：2
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作者 刘承锡 何再雨 +1 位作者 赖秋频 罗永建 《电工技术学报》 EI CSCD 北大核心 2026年第1期156-168,共13页
电力系统的电压-无功安全域对于监测节点电压状态和避免发电机无功出力越限具有重要意义。因此,该文提出一种基于非线性网络分解的节点电压-无功可视化安全域方法,能够实时可视化监测各个节点的电压水平及发电机的无功状态,并预测潜在... 电力系统的电压-无功安全域对于监测节点电压状态和避免发电机无功出力越限具有重要意义。因此,该文提出一种基于非线性网络分解的节点电压-无功可视化安全域方法,能够实时可视化监测各个节点的电压水平及发电机的无功状态,并预测潜在越限事件发生的风险。首先,通过建立两节点虚拟通道对电力系统进行解耦,并引入表征节点电压-无功状态的复数型指标;其次,运用物理性全纯嵌入法(HEM)求解随着系统负荷状态变化时的节点电压-无功状态指标轨迹(SIT);然后,分别推导节点电压和发电机无功出力的安全域边界解析表达式,并将其与节点电压-无功状态指标轨迹在同一复平面内可视化;最后,在不同规模节点系统中验证了所提电力系统节点电压-无功可视化安全域的有效性。 展开更多
关键词 静态安全域 电压安全域 无功安全域 可视化 两节点虚拟通道 全纯嵌入法
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Dynamic Mechanisms of Land Use Conflict Under Main Function Oriented Zone Planning:A Case Study of Beijing-Tianjin-Hebei Region 认领 引用 被引量：1
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作者 ZHENG Yang CHENG Linlin +2 位作者 WANG Junqi WANG Yifang CUI Huizhen 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第2期320-336,共17页
Systematically analyzing the impact mechanisms of policy on Land Use Conflict(LUC)is crucial for constructing effective conflict mitigation strategies.However,previous research on how policy influences LUC remains rel... Systematically analyzing the impact mechanisms of policy on Land Use Conflict(LUC)is crucial for constructing effective conflict mitigation strategies.However,previous research on how policy influences LUC remains relatively limited.Focusing on the indirect driving role of policy on LUC,this study proposed County Development Level(CDL)under Major Function Oriented Zone Planning(MFOZP)guidance as an intermediary variable,bridging the implicit influence of MFOZP and the explicit changes in LUC.Using the Beijing-Tianjin-Hebei(BTH)region in China as a case study,we analyzed the spatio-temporal evolution characteristics of LUC and CDL for the periods 2000-2010 and 2010-2020,before and after MFOZP implementation.Panel models and Geographically Weighted Regression(GWR)were employed to explore the mechanism by which CDL influences LUC under MFOZP guidance.The results show that:1)MFOZP implementation effectively alleviates land use pressure from regional development,with LUC continuously declining at a rate of 2.41%,while CDL exhibits slight growth(3.84%),during 2010-2020.2)Under MFOZP guidance,CDL reduces pressure on Land Use Structure Conflict(LUSC)and Land Use Process Conflict(LUPC),enhances its inhibitory effect on Land Use Function Conflict(LUFC),and significantly contributes to LUC coordination,with notable spatial heterogeneity.3)The coupling relationship between CDL and LUC has improved post-implementation.Based on this,tailored LUC coordination strategies are proposed for different functional zones.This study confirms the effectiveness of MFOZP in coordinating LUC and provides a scientific reference for LUC research under policy frameworks and the governance of LUC in the BTH region. 展开更多
关键词 Land Use Conflict(LUC) Major Function Oriented Zone Planning(MFOZP) County Development Level(CDL) Beijing-Tianjin-Hebei(BTH)region,China
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Forecasting ecosystem service values in South China's fragile mountain regions:a multi-scenario analysis with adaptive land use valuation 认领 引用
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作者 LIAO Zhaoyang YU De +3 位作者 RAN Penglai ZHENG Defu SHANG Guiduo TAN Jie 《Journal of Mountain Science》 SCIE CSCD 2026年第2期813-827,共15页
Numerous economically underdeveloped and ecologically fragile areas in southern China's mountainous regions face increasing challenges in achieving sustainable development. A comparative analysis of ecosystem serv... Numerous economically underdeveloped and ecologically fragile areas in southern China's mountainous regions face increasing challenges in achieving sustainable development. A comparative analysis of ecosystem service responses to land use scenarios, incorporating adaptive valuation coefficients, can reveal actionable pathways to reconcile sustainable development and ecological conservation in mountainous regions. In this study, the ecosystem service value(ESV) dynamics in the Hunan–Jiangxi Border Region(HJBR), which is a representative old revolutionary base with a relatively undeveloped economy, were investigated by integrating historical land use data analysis from 2000 to 2020 and adopting patch-generating land use simulation(PLUS) modelling. Three policy-responsive scenarios, namely, natural growth(NGS), farmland protection(FPS), and ecological protection(EPS), were systematically developed to project ESV variations for 2030 and 2040. Our analysis revealed that from 2000 to 2020, urban sprawl and water body expansion occurred at the expense of forestland, cultivated land, and grassland, yet yield-driven productivity improvements increased the ESV by 227.30%(equivalent to ¥250.0 billion). By 2040, the NGS achieves the greatest ESV increase(¥189.895 billion) while fully accommodating urban land demand;the FPS yields the smallest ESV increase(¥148.169 billion), with the EPS occupying an intermediate position(¥182.207 billion). Climate regulation and hydrological services dominate ecological functions, collectively exceeding 49% across all the scenarios and periods. By 2040, most service functions exhibit growth trends except for a 0.30% water supply decline under the FPS, whereas the EPS demonstrates balanced development through multidimensional service enhancements. These findings underscore the necessity of integrating ecological safeguards into land use planning frameworks to ensure sustainable regional development. 展开更多
关键词 Ecosystem service value(ESV) Multiscenario simulation PLUS model LUCC Mountainous Regions Hunan–Jiangxi Border Region(HJBR)
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Hydrocarbon Accumulation Model of Carbonate Reservoirs in Palaeogene in Kekeya Area, Southwest Depression in the Tarim Basin, China 认领 引用
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作者 Fujie Jiang Zhuoyue Yan +7 位作者 Junqing Chen Xianjun Zhang Yuying Wang Xiongqi Pang Xuanwei Liu Yujie Jin Lei Wang Yaoxi Sun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2026年第3期894-909,共16页
As a rare marine carbonate reservoir developed after the Eocene in the world,the oil and gas source of Palaeogene carbonate reservoirs in Kekeya area and the evolution process and mechanism of hydrocarbon accumulation... As a rare marine carbonate reservoir developed after the Eocene in the world,the oil and gas source of Palaeogene carbonate reservoirs in Kekeya area and the evolution process and mechanism of hydrocarbon accumulation are not clear,restricting the reasonable and effective development of Kekeya area.By the use of drilling cores and experimental data,oil and gas source correlation,reservoir evaluation,accumulation period and reservoir formation process were studied.Results show that the source rocks in the study area are mainly Permian lacustrine mudstone and Jurassic coal-bearing source rocks.The Palaeogene carbonate reservoirs are generally low porosity and ultra-low permeability,with secondary dissolution pores as the main reservoir space.The oil-gas source correlation shows that the Palaeogene crude oil is derived from the Permian source rock,and the natural gas is derived from the Jurassic source rock.The ancient and present reservoirs have experienced two oil and gas filling stages.The first stage is the middle and late Pliocene and the second stage is the early Pleistocene.The hydrocarbon accumulation mode was built as 'source-reservoir separation,fracture dredging,multi-stage filling'.The research results guide exploration in Tarim Basin and similar basins. 展开更多
关键词 accumulation model carbonatite Kekeya region Palaeogene Tarim Basin
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Land use and landscape pattern changes dominated ecosystem service trade-offs and synergies in a temperate mountain region 认领 引用
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作者 Li Liu Wen J.Wang +5 位作者 Suri G.Bao Shengjie Ba Lei Wang Yu Cong Haitao Wu Hong S.He 《Forest Ecosystems》 SCIE CAS CSCD 2026年第2期434-445,共12页
Climate change,land use/cover changes(LUCC),and landscape pattern alterations have increasingly complicated interactions among ecosystem services(ES)in temperate mountain forests,underscoring the importance of underst... Climate change,land use/cover changes(LUCC),and landscape pattern alterations have increasingly complicated interactions among ecosystem services(ES)in temperate mountain forests,underscoring the importance of understanding the mechanisms underlying the dominant trade-offs and synergies to inform sustainable natural resource management.In this study,we quantified the degree of trade-offs and synergies among water yield(WY),soil retention(SR),carbon storage(CS),and habitat quality(HQ),and elucidated their dominant drivers in the Changbai Mountain Region,Northeast China,from 1990 to 2020.Our results demonstrated that SR(+29.56%)and CS(+9.90%)increased,while WY(−8.77%)and HQ(−20.77%)decreased over the 30 years.ES interactions were dominated by trade-offs between WY and SR and synergies between WY and HQ.These dominant interactions were mainly driven by LUCC,particularly cropland expansion,forest loss,and urbanization,along with landscape pattern alterations associated with increased fragmentation and enhanced connectivity from afforestation,whereas climatic changes played a comparatively smaller role.LUCC not only directly influenced ES interactions but also exerted indirect effects through its alterations of landscape patterns.These complex,multifaceted drivers shape ES relationships and intensify mismatches between ES supply and demand,underscoring the urgent need for integrated,spatially explicit management strategies to balance ES provisioning and ensure long-term ecological sustainability in montane regions. 展开更多
关键词 Ecosystem services Interactions Driving factors Temperate Changbai Mountain Region
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Water-saving Effect of Domestic and Industrial Water Pricing Policies Using Nonlinear Fixed-effect Models 认领 引用
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作者 CAI Hongwei BO Yan +6 位作者 FU Jin ZOU Jiadi YU Zhijian ADALIBIEKE Wulahati WANG Jinxia GONG Yazhen ZHOU Feng 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第6期1020-1035,共16页
The Huang(Yellow River)-Huai(Huaihe)-Hai(Haihe)region(3H region)is an area with dense population,industry and agriculture in China,and is vital to the national economic development.Water scarcity in this region has be... The Huang(Yellow River)-Huai(Huaihe)-Hai(Haihe)region(3H region)is an area with dense population,industry and agriculture in China,and is vital to the national economic development.Water scarcity in this region has become critical especially due to climate change and intensified human activities.It is therefore essential to quantify the impact of water pricing policies on water consumption for optimizing water consumption structure and improving water use efficiency.This paper analyzed the water-saving effect of water pricing policies based on nonlinear fixed-effect models considering users’behaviors,and compared the water price elasticities in domestic and industrial sectors among provincial regions during 2007–2016.The results show that the price elasticity of industrial water demand approached unit elasticity,whereas the price elasticity of domestic water demand is relatively low.Consequently,water pricing policies during 2007–2016 reduced industrial water demand by 55.9%and domestic water demand by only 23.8%.By 2030,water price needs to be raised about 45%to balance the total water demand,as the growth per capita Gross Domestic Product(GDP)and industrial Gross Value Added(GVA)are projected to drive significant rise in water demand(both P<0.001).This study revealed the limitation of current water pricing policies on regional water conservation,which needs a combination with other measures to systematically promote water use efficiency and alleviate water stress. 展开更多
关键词 domestic and industrial water use water price demand elasticity water resources management nonlinear model Huang-Huai-Hai region(3H region),China
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构建优势互补、高质量发展的区域经济布局:推进难点及应对举措 认领 引用 被引量：4
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作者 刘耀彬 陈利鹏 《改革》 CSSCI 北大核心 2026年第2期46-56,共11页
构建优势互补、高质量发展的区域经济布局,是以习近平同志为核心的党中央立足区域经济发展新形势作出的重大战略部署,已成为中国式现代化进程中优化重大生产力布局、推动更高水平区域协调发展的关键支撑。从历史逻辑、理论逻辑和实践逻... 构建优势互补、高质量发展的区域经济布局,是以习近平同志为核心的党中央立足区域经济发展新形势作出的重大战略部署,已成为中国式现代化进程中优化重大生产力布局、推动更高水平区域协调发展的关键支撑。从历史逻辑、理论逻辑和实践逻辑三个维度,系统阐释“构建优势互补、高质量发展的区域经济布局”的内在逻辑,揭示其兼具历史传承性、理论创新性和实践指导性的鲜明特征。当前推进这一布局的核心难点,主要包括区域分工定位模糊、内生发展动力匮乏、要素流动不畅通、禀赋价值分配失衡等。面向“十五五”时期,加快形成优势互补、高质量发展的区域经济布局,亟须立足资源禀赋,精准提升区域比较优势辨识度,以夯实区域合理分工基础;强化创新驱动引领,突破传统路径依赖,以激发区域内生发展动力;深化体制机制改革,破除行政壁垒,以畅通区域要素高效流动渠道;健全利益协调机制,厘清收益分配关系,以推动区域禀赋价值公平合理实现。 展开更多
关键词 优势互补 高质量发展 区域经济布局 区域协调发展
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The relative role of regional species pools in determining tree species richness and rarity in Chinese subtropical and tropical forests 认领 引用
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作者 Houjuan Song Borja Jiménez-Alfaro +23 位作者 Yongchang Song Jens-Christian Svenning Alejandro Ordonez Oukai Zhang Xihua Wang Enrong Yan Kun Song Luxiang Lin Shengbin Chen Qingpei Yang Buhang Li Chuping Wu Bo Jiang Chao Jin Zhiming Zhang Yi Ding Huilin Wan Kankan Shang Kunfang Cao Wei Shi Xin Wang Xiaoran Wang Pengcheng Liu Jian Zhang 《Plant Diversity》 SCIE CAS CSCD 2026年第2期340-350,共11页
The species pool hypothesis argues that local species diversity mainly depends on regional diversity,which is influenced by dispersal,historical and current environmental conditions.We hypothesize that regional factor... The species pool hypothesis argues that local species diversity mainly depends on regional diversity,which is influenced by dispersal,historical and current environmental conditions.We hypothesize that regional factors,such as the size of the regional species pool,current climate,topographical variability,and historical climate stability,also impact local species-abundance patterns,like the rarity of local species,though their specific effects are not yet well understood.Analyzing data from 3307 species across 3923 forest plots in Chinese subtropical and tropical regions,we employed boosted regression trees and structural equation modeling to assess the roles of regional species pool size along with climatic seasonality,topography,and soil factors,in shaping local richness and rarity.We found that local tree species richness declined with increasing latitude,while species rarity decreased from west to east.The factors such as current regional environment,paleoclimate stability,and human disturbance significantly affected local richness and rarity,primarily through their effects on regional species pool size.The impacts of regional mean temperature and elevational range on local richness surpassed local influences.Conversely,local climatic seasonality exerted the strongest influence on species rarity,followed by human activity.Overall,the findings indicate that regions with large regional species pools tend to support diverse communities with high proportions of rare species. 展开更多
关键词 Habitat heterogeneity Climatic stability Regional effect Species pool Species rarity
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区域“无废城市”建设协同推进策略研究 认领 引用 被引量：1
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作者 刘晓龙 温宗国 +1 位作者 唐岩岩 杜祥琬 《中国科学院院刊》 CAS CSSCI CSCD 北大核心 2026年第3期581-591,共11页
《中共中央关于制定国民经济和社会发展第十五个五年规划的建议》强调,深化跨行政区合作,健全区域间规划统筹、产业协作、利益共享等机制,促进区域联动发展。当前,我国“无废城市”建设成效显著,但面向长远,迫切需要在区域层面统筹协同... 《中共中央关于制定国民经济和社会发展第十五个五年规划的建议》强调,深化跨行政区合作,健全区域间规划统筹、产业协作、利益共享等机制,促进区域联动发展。当前,我国“无废城市”建设成效显著,但面向长远,迫切需要在区域层面统筹协同,建立跨政府、跨层级、跨部门的固废协同治理长效机制,实现邻近甚至非邻近区域间固废治理资源优化分配、共建共治共享、绿色低碳新质生产力壮大升级的良性机制。文章阐释了区域“无废城市”建设协同推进的重大意义,梳理了协同推进的成效、面临的形势与挑战。建议:在“无废城市”建设过程中,应有意识强化区域协作的顶层设计,以重大工程示范试点牵引区域固废协同处置,充分推动信息共享和数字化赋能跨区域固废协同治理,不断完善区域内及跨区域固废协同共治长效机制,构建固废跨区域转移交易市场体系。 展开更多
关键词 无废城市 固废治理 区域战略 区域协同
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Prediction of Regional Surface Wave Parameters in the Qinhuangdao Sea Using a Deep Learning Model with Limited Observational Data 认领 引用
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作者 WANG Lei FANG Kezhao +2 位作者 ZHOU Long GONG Lixin HUO Yongwei 《Journal of Ocean University of China》 SCIE CAS CSCD 2026年第1期74-90,共17页
Waves are important physical phenomena in an ocean,and their accurate prediction is essential for ocean engineering,maritime traffic,and marine early warning systems.This study focuses on the Qinhuangdao Sea area loca... Waves are important physical phenomena in an ocean,and their accurate prediction is essential for ocean engineering,maritime traffic,and marine early warning systems.This study focuses on the Qinhuangdao Sea area located in the Bohai Sea,China.Herein,we use on-site wind data to correct the reanalysis wind data obtained from the European Centre for Medium-Range Weather Forecasts(ECMWF),improving the accuracy of boundary conditions.Then,we use the Simulating WAves Nearshore(SWAN)model to simulate the regional wave field over time.A regional wave-parameter prediction model is then developed using a limited number of sampled data(covering only 2 years,2020–2021);the model is based on the Whale Optimization Algorithm(WOA),convolutional neural networks(CNNs),and long short-term memory(LSTM)neural networks.WOA is used to optimize the CNN and LSTM framework;in this framework,CNN extracts spatial features,and the LSTM network captures temporal features,enabling accurate short and long-term predictions of wave height,period,and direction.The experimental results showed that despite the small sample size,the model achieves a goodness of fit of 0.9957 for wave height prediction,0.9973 for period,and 0.9749 for wave direction in short-term forecasting.As the prediction step size increases,the accuracy of the model decreases.When the prediction step size reaches 9 h,the root mean square error for the prediction of wave height,period,and direction increases to 0.2060 m,0.4582 s,and32.5358°,respectively.The reliability and applicability of the model are further validated by the experimental results.Our findings highlighted the potential of the developed model in operational wave forecasting,even with a limited number of sampled data. 展开更多
关键词 regional wave prediction deep learning WOA-CNN-LSTM numerical simulation Bohai Sea
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