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Cold-bonded lightweight aggregates as replacement materials for road applications 认领 引用 被引量：1
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作者 Yu Liu Zhenzhen He +3 位作者 Chengwang Zhou Yulin He Zhen Leng Jiaji Ma 《Journal of Road Engineering》 EI CAS 2026年第2期177-200,共24页
The development of road materials as alternatives to mineral aggregates has become an important research direction.This paper proposes cold-bonded lightweight aggregates(R-CBLA)as substitutes for conventional aggregat... The development of road materials as alternatives to mineral aggregates has become an important research direction.This paper proposes cold-bonded lightweight aggregates(R-CBLA)as substitutes for conventional aggregates and prepares lightweight aggregate-modified soil(LA-Soil)and lightweight aggregate-hydraulic bound mixtures(LA-HBM)for subgrade and base applications.By adjusting the rotation speed of the extrusion granulator,feeding rate,and raw material moisture,R-CBLA can be produced with a granulation rate higher than 90%.Its water absorption shows a significant negative correlation with strength,while bulk density exhibits a significant positive correlation,thus providing a theoretical basis for optimizing performance.In LA-Soil,incorporating 40%–50%R-CBLA with natural coarse grains develops a skeleton-dense structure,which enhances dry density,CBR,and resilient modulus,while still maintaining durability under freeze-thaw cycles.In LA-HBM,two critical replacement thresholds are identified,performance changes are limited below 25%,performance decreases moderately but remains technically feasible between 25%and 75%,the skeleton structure becomes unstable and performance declines sharply beyond 75%.Cost analysis further shows that R-CBLA offers advantages in materials,transportation,and construction,with maximum cost reductions reaching 87%.This economic benefit is especially pronounced in resource-scarce regions.In conclusion,the study verifies the feasibility of R-CBLA in road engineering,proposes a long-life pavement design concept,and emphasizes largescale production,systematic performance optimization,and long-term durability as priorities for future research. 展开更多
关键词 Road engineering materials Cold-bonded lightweight aggregate Lightweight aggregate-modified soil(LA-Soil) LA-hydraulically bound mixture(LA-HBM) Mechanical properties and cost-performance
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Road surface status recognition and estimation:State-of-the-art review and research perspectives 认领 引用
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作者 Yongjun Yan Chao Du +5 位作者 Weihua Wang Renjie Ma Yan Wang Hongliang Wang Dawei Pi Ye-Hwa Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第3期334-347,共14页
Accurate recognition and estimation of road state in real-time is an important prerequisite for vehicle driving safety,transient handling stability,ride comfort,and other performance.In order to grasp the main develop... Accurate recognition and estimation of road state in real-time is an important prerequisite for vehicle driving safety,transient handling stability,ride comfort,and other performance.In order to grasp the main development trend in this field systematically and in a timely manner,in this paper,the latest research progress of the identification and estimation methods of two key road state parameters,road roughness and road surface ad-hesion coefficient,is comprehensively reviewed.Firstly,according to the difference in basic theory and im-plementation principle,the research progress of road roughness recognition and estimation methods is reviewed from three aspects:section class method,system response-based method,and machine learning-based method.Then,the research progress of road surface adhesion coefficient recognition and estimation methods is sum-marized from four aspects:cause-based method,effect-based method,data-driven method,and multi-method fusion method.Finally,the advantages and disadvantages,technical challenges,and future development trends of different road recognition and estimation methods are analyzed. 展开更多
关键词 Road condition Road roughness Road adhesion coefficient Kalman filtering Machine learning
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Boundary conditions for setting thorax impactor subsystem tests to assess vehicle safety performance on protection of vulnerable road users 认领 引用
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作者 Guibing Li Wenbo Gao +2 位作者 Xiaojiang Lv Zhi Xiao Fuhao Mo 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第2期277-286,共10页
Chinese automobile safety regulations are considering the introduction of thorax impactor subsystem tests to evaluate vehicle safety performance concerning thorax protection for Vulnerable Road Users(VRUs).However,the... Chinese automobile safety regulations are considering the introduction of thorax impactor subsystem tests to evaluate vehicle safety performance concerning thorax protection for Vulnerable Road Users(VRUs).However,there is currently an insufficient amount of data regarding VRU thorax-vehicle contact boundary conditions,which is essential for establishing the thorax impactor test procedure.Consequently,the obj ective of this study is to examine the characteristics of VRU thorax-vehicle contact boundary conditions,utilizing multi-body crash simulations that are informed by the distribution of accident scenarios.The simulation data suggest that the boundary conditions for thorax-vehicle contact in VRUs are predominantly influenced by the relative height of the VRU's pelvis in relation to the vehicle's bonnet leading edge,which in turn affects upper body kinematics.This results in variations across different vehicle and VRU types involved in collisions.The analysis of these contact boundary conditions indicates that thorax impactor subsystem test procedures should differentiate between vehicle types.The results suggest that:thorax impactor subsystem tests should concentrate on the Wrap Around Distance(WAD) range of 900-1800 mm;for testing at the bonnet-windscreen area,the thorax impactor could be launched at speeds of 16.5 km/h(with a vector angle of 24° and an initial inclination angle of 17°) for sedans,and 23.5 km/h(with a vector angle of 25° and an initial inclination angle of 22°) for SUVs/MPVs.Additionally,a horizontally directional velocity of 35.5 km/h(with an initial inclination angle of 30°) could be specified for thorax impactor tests at the bonnet leading edge area of SUVs/MPVs.The above data provides foundational data for future thorax impactor subsystem tests in China. 展开更多
关键词 Vulnerable road users Thorax-vehicle contact Boundary conditions Impactor subsystem test
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Has the Belt and Road Initiative reshaped the ecological sustainability of Eurasia:A perspective of three-dimensional ecological footprint 认领 引用
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作者 Nan Yu Tianming Shao +1 位作者 Renjin Sun Chunming Xu 《Petroleum Science》 SCIE EI CAS CSCD 2026年第3期1553-1571,共19页
At present,environmental problems are becoming increasingly severe,and sustainable development concerns the common destiny of all mankind around the world.Leveraging ecological footprint and ecological carrying capaci... At present,environmental problems are becoming increasingly severe,and sustainable development concerns the common destiny of all mankind around the world.Leveraging ecological footprint and ecological carrying capacity data for Eurasia from 2000 to 2022,this study employs a three-dimensional ecological footprint model to conduct a multi-scale sustainability assessment.Further applying a difference-in-differences model,we analyze the impact mechanisms of the Belt and Road Initiative on Eurasia's ecological footprint.Quantile regression and heterogeneity analysis reveal Belt and Road Initiative's differential effects across countries.Key findings indicate that:(1)Eurasia's unsustainable development intensified from 2000 to 2022,with ecological footprint depth rising from 1.966 to 2.513 ha/cap,while per capita ecological footprint size declined slightly from 1.092 to 1.023 ha/cap.(2)Classifying 83 countries into 9 sustainability types based on ecological footprint depth and size,Asia showed weak sustainability(low size-medium depth and low size-low depth types),while Europe was primarily low size-medium depth with relatively stronger sustainability.Six countries experienced weakened sustainability and six improved.(3)The Belt and Road Initiative significantly increased ecological footprint in Eurasian countries,mediated by industrial structure,technological innovation,and foreign direct investment.Quantile regression indicates Belt and Road Initiative's effect is stronger in nations with lower initial ecological footprint.Heterogeneity analysis further shows Belt and Road Initiative disproportionately impacts countries with lower ecological footprint depth,smaller per capita ecological footprint size,and weaker sustainability.These insights provide critical guidance for implementing the UN 2030 Agenda and formulating Belt and Road Initiative policies to enhance long-term sustainability. 展开更多
关键词 Ecological footprint Eurasia The Belt and Road initiative Difference-in-differences Sustainable development
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Model Construction for Complex and Heterogeneous Data of Urban Road Traffic Congestion 认领 引用
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作者 Jianchun Wen Minghao Zhu +2 位作者 Bo Gao Zhaojian Liu Xuehan Li 《Computers, Materials & Continua》 SCIE EI 2026年第2期1354-1370,共17页
Urban traffic generates massive and diverse data,yet most systems remain fragmented.Current approaches to congestion management suffer from weak data consistency and poor scalability.This study addresses this gap by p... Urban traffic generates massive and diverse data,yet most systems remain fragmented.Current approaches to congestion management suffer from weak data consistency and poor scalability.This study addresses this gap by proposing the Urban Traffic Congestion Unified Metadata Model(UTC-UMM).The goal is to provide a standardized and extensible framework for describing,extracting,and storing multisource traffic data in smart cities.The model defines a two-tier specification that organizes nine core traffic resource classes.It employs an eXtensible Markup Language(XML)Schema that connects general elements with resource-specific elements.This design ensures both syntactic and semantic interoperability across siloed datasets.Extension principles allow new elements or constraints to be introducedwithout breaking backward compatibility.Adistributed pipeline is implemented usingHadoop Distributed File System(HDFS)and HBase.It integrates computer vision for video and natural language processing for text to automate metadata extraction.Optimized row-key designs enable low-latency queries.Performance is tested with the Yahoo!Cloud Serving Benchmark(YCSB),which shows linear scalability and high throughput.The results demonstrate that UTC-UMM can unify heterogeneous traffic data while supporting real-time analytics.The discussion highlights its potential to improve data reuse,portability,and scalability in urban congestion studies.Future research will explore integration with association rulemining and advanced knowledge representation to capture richer spatiotemporal traffic patterns. 展开更多
关键词 Metadata urban road traffic heterogeneous data hbase semantic description framework
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Application of organic red mud in SBS-modified asphalt mixture:Influence on road performance and thermal-oxidative aging resistance 认领 引用
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作者 Henglong Zhang Zhijian Zeng +1 位作者 Haohan Li Xiaoya Zhu 《Journal of Road Engineering》 EI CAS 2026年第2期299-313,共15页
The deterioration of road performance in asphalt mixtures due to aging can significantly affect the service period of asphalt pavement.Therefore,it is particularly important to find a suitable method to resist the agi... The deterioration of road performance in asphalt mixtures due to aging can significantly affect the service period of asphalt pavement.Therefore,it is particularly important to find a suitable method to resist the aging of asphalt mixture.In this study,various red mud-compounded styrene-butadiene-styrene(SBS)-modified asphalt mixtures were prepared using acid-treated and surface-modified raw red mud(RM)as a modifier for SBS-modified asphalt.First,SBS-modified asphalt mixture specimens were prepared at the optimal oil-rock ratio.Subsequently,both unaged and aged mixtures were subjected to Marshall stability,low-temperature splitting,freeze-thaw splitting,and indirect tensile fatigue tests to evaluate the effect of different red muds on the road performance of SBSmodified asphalt mixtures.The experimental results showed that the addition of raw red mud(RM)improved the high-temperature performance,moisture susceptibility,and fatigue performance of SBS-modified asphalt mixtures,but adversely affected their low-temperature performance.The high-temperature stability,moisture susceptibility,and fatigue performance were further enhanced with the incorporation of organic red mud.Additionally,raw red mud effectively delayed the thermal-oxidative aging of the mixture.After surface modification,red mud can significantly enhance the thermal-oxidative aging resistance of the SBS-modified asphalt mixture.Among the tested samples,the mixture incorporating red mud treated with oxalic acid and titanate coupling agent exhibited the highest durability against aging. 展开更多
关键词 SBS-modified asphalt mixture Red mud Road performance Thermal-oxidative Surface modification
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Vehicle emissions and industrial activities as major sources of methylsiloxanes in urban road dust:a nationwide study in China 认领 引用
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作者 Fei Zhang Xinru Luo +8 位作者 Haoran Niu Anping Zhang Xianfa Su Jianhui Sun Jing Han Shujie Guo Shuying Dong Zhenwu Tang Jinglan Feng 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第2期143-152,共10页
Methylsiloxanes(MSs)are anthropogenic substances that do not occur naturally,and most studies have focused on their presence in indoor environments.To date,there is limited information regarding their prevalence in ro... Methylsiloxanes(MSs)are anthropogenic substances that do not occur naturally,and most studies have focused on their presence in indoor environments.To date,there is limited information regarding their prevalence in road dust across broad geographical scales,with even fewer studies identifying the sources of MSs.This research investigates the levels,regional distributions,and potential origins of MSs in road dust collected from major cities throughout China.The results indicate that these chemicals are prevalent in road dust,with total concentrations of the target MSs ranging from 6.36 to 8618 ng/g dw.Tetradecamethylcycloheptasiloxane was identified as the dominant methylsiloxane.Spatial variations were primarily associated with traffic flow,the value added by the secondary industry,and local population density.Principal component analysis combined with multiple linear regression and positive matrix factorization revealed that vehicle emissions(41.8%–42.3%),industrial activities(38.9%–47.2%),and the use of personal care and consumer products(11.0%–18.8%)were the major contributors to MSs in road dust.The overall source contributions identified by both methods were consistent.These findings highlight the significant role of vehicle emissions and industrial activities and provide valuable insights for developing policies aimed at managing MSs in urban areas. 展开更多
关键词 Methylsiloxanes Road dust Source Principal component analysis/multiple linear regression Positive matrix factorization
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Vulnerability of mountain road networks to rainfall-induced landslide hazards 认领 引用
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作者 ZHANG Yingbin YANG Zhiwei +3 位作者 LIU Jing ZENG Ying SUN Yu TAN Jinyang 《Journal of Mountain Science》 SCIE CSCD 2026年第1期188-202,共15页
Global climate change is intensifying the impact of slope hazards,particularly rainfall-induced landslide hazards(RILH),on mountain road networks(MRNs).However,effective quantitative models for dynamically assessing M... Global climate change is intensifying the impact of slope hazards,particularly rainfall-induced landslide hazards(RILH),on mountain road networks(MRNs).However,effective quantitative models for dynamically assessing MRNs vulnerability under RILH disturbances are still lacking.To bridge this gap,this study develops a Cascading Failure Model for Rainfall-Induced Landslide Hazard(CFM-RILH).Validation via a case study of the GarzêTibetan Autonomous Prefecture Road Network(GTPRNs)reveals key characteristics of MRNs system vulnerability under RILH disturbances:(1)Under the disturbance effects of RILH,the vulnerability of the MRNs system follows a nonlinear phase transition law that intensifies with increasing disturbance intensity,exhibiting a distinct critical threshold.When the disturbance intensity exceeds this threshold,the system undergoes a global cascading failure phenomenon analogous to an“avalanche.”(2)Under RILH disturbances,the robustness of the MRNs system possesses a distinct safety boundary.Exceeding this boundary not only fails to improve hazard resistance but instead substantially elevates the risk of large-scale cascading failure.(3)Increasing network redundancy may be considered one of the primary engineering measures for enhancing MRNs resilience against such disturbances.Based on these findings,we propose a“Two-Stage Emergency Response and Hierarchical Fortification”strategy specifically to improve the resilience of GTPRNs impacted by RILH.The CFM-RILH model provides an effective tool for assessing road network vulnerability under such hazards.Furthermore,its modeling framework can also inform vulnerability assessment and resilience strategy development for road networks affected by other types of slope hazards. 展开更多
关键词 Global climate change Mountain road networks Rainfall-induced landslides Cascading failure model Vulnerability
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Investigation on Mixed Reflection Behavior of Cool Pavement Coating and Its Impact on Safety of Road Light Environment 认领 引用
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作者 Hui Li Ning Xie +3 位作者 Xue Zhang Lijun Sun John T.Harvey Lei Wang 《Engineering》 SCIE EI CSCD 2026年第3期203-220,共18页
Due to low reflectance(5%10%)of black asphalt pavement,most of the incident solar radiation(2952500 nm)is absorbed and stored.This results in the high temperature(even exceeding 70 C in summer)of the pavement surface,... Due to low reflectance(5%10%)of black asphalt pavement,most of the incident solar radiation(2952500 nm)is absorbed and stored.This results in the high temperature(even exceeding 70 C in summer)of the pavement surface,which leads to pavement diseases,exacerbates the heat island effect,and reduces human thermal comfort.Reflective pavement coating with high reflectance ranging from 20%to 80%is an effective way to solve the above problems.However,excessively improving the visible reflectance and ignoring the mixed reflection behavior(including specular and diffuse reflection properties)may cause glare problems and negatively affect road light environment safety.Therefore,precise control of reflectance is very significant.In this study,an automated test platform of reflection behavior was developed to investigate the mixed light reflection distribution pattern of reflective coating.Additionally,the impact of reflective coating on the light environment was explored.It was found that there was obvious specular reflection under conditions of a low incidence angle(less than 10°).Moreover,reflective coating could change the lightness index and specular reflection coefficient of traditional pavement.Finally,considering glare during the daytime and the nighttime illumination safety,the control indexes of reflective pavement coating were proposed.The visible reflectance and specular reflection coefficient should be lower than 22%and 1.5,respectively.The results will provide a theoretical basis for the precise and safe design of reflective pavement coatings.The coatings aim to improve the thermal and light environments,thereby enhancing driving safety,while also providing better illumination during emergency repair and maintenance of road infrastructure. 展开更多
关键词 Road infrastructure Pavement engineering Cool pavement Reflective coating Optical characteristic Glare safety Light environment
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An Improved YOLOv11-Based Detection Method for Hidden Void and Loose Defects in Urban Road Ground-Penetrating Radar Images 认领 引用
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作者 Bin Chen Chao Qiu Wanli Cui 《Structural Durability & Health Monitoring》 EI 2026年第4期222-245,共24页
Ground-penetrating radar(GPR)imaging is widely used for detecting hidden defects in urban roads.However,the complex noise environment,large-scale variations in defect features,and the sensitivity of slender defects to... Ground-penetrating radar(GPR)imaging is widely used for detecting hidden defects in urban roads.However,the complex noise environment,large-scale variations in defect features,and the sensitivity of slender defects to annotation errors pose significant challenges to accurate detection.To address these issues,this study proposes an improved object detection framework,termed DFF-MoCA-YOLO,based on YOLOv11 for identifying void and loose defects in GPR images.First,a multi-strategy gated feature fusion module(MSGFF-C3k2)is designed to enhance feature robustness against complex noise and scale variations.Then,aMonte Carlo Attention(MoCAttention)module is introduced to improve defect-feature representation via stochastic sampling and channel recalibration.Subsequently,an adaptive aspect-ratio penalty CIoU loss(CIoU-ARP)is developed to improve bounding box regression accuracy for slender defects.A labeled dataset containing void and loose defects is constructed using multi-source GPR data collected from eight urban roads.Finally,a series of ablation experiments is conducted on the proposed modules.Experimental results demonstrate that the proposed method achieves consistent performance improvements over the baseline YOLOv11 and other mainstream YOLO variants,while maintaining relatively low computational complexity.The results indicate that the proposed framework offers an effective and practical solution for detecting hidden defects in urban roads using GPR images.Moreover,the model’s robustness to noise and ability to accurately detect defects at varying scales make it a promising tool for urban infrastructure maintenance.Its efficient performance with minimal computational overhead makes it suitable for real-time defect detection. 展开更多
关键词 Road hidden defects ground-penetrating radar improvement to YOLOv11
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Impact of China's outward foreign direct investment on the Belt and Road Initiative countries'digital economy and energy transition 认领 引用 被引量：1
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作者 Jiahui Jiang Pin Li Jinsuo Zhang 《Data Science and Management》 EI CSCD 2026年第1期1-14,共14页
Digital economy(DE)is on the verge of becoming a pivotal facilitator of the energy transition(ET).However,it remains to be seen to what extent China's outward foreign direct investment(OFDI)can stimulate the devel... Digital economy(DE)is on the verge of becoming a pivotal facilitator of the energy transition(ET).However,it remains to be seen to what extent China's outward foreign direct investment(OFDI)can stimulate the development of the DE and promote ET under the Belt and Road Initiative(BRI).Employing a nonparametric additive model,this study examines this issue by using panel data from 84 BRI countries spanning 2007–2022.The connections between China's OFDI and the DE and ET of BRI nations vary across different regions.China's OFDI has considerably fostered the ET of nations along its route to Central Asia,Europe,North Africa,and the Middle East.Conversely,in the Pacific and East Asian regions,China's OFDI has a constructive effect on the advancement of DE in participating nations.However,the effect of China's OFDI on the ET of nations in the Pacific Islands and East Asia and South Asia is statistically insignificant.Moreover,China's OFDI impairs the DE of nations in Central Asia and Europe,the Caribbean and Latin America,as well as North Africa and the Middle East.Notably,the net effect of China's OFDI on ET is positive;however,the mediating effect of facilitating ET through DE is not pronounced. 展开更多
关键词 China's outward foreign direct investment Belt and Road Initiative Energy transition Digital economy Nonparametric additive model
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Incorporating climate adaptation into future road infrastructure maintenance costs 认领 引用
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作者 Pengcheng Zhang Wen Yi +6 位作者 Yongze Song Zhi Cao Peng Wang Weiqiang Chen Peng Wu Ammar Shemery Keith Hampson 《Geography and Sustainability》 CSCD 2026年第3期305-317,共13页
The effects of climate change,such as increasing temperatures and changing precipitation patterns,significantly affect road infrastructure's structural integrity and longevity,requiring a reevaluation of maintenan... The effects of climate change,such as increasing temperatures and changing precipitation patterns,significantly affect road infrastructure's structural integrity and longevity,requiring a reevaluation of maintenance standards.Previous research on pavement performance did not incorporate climate adaptation into maintenance standards.This study develops a scenario-based road infrastructure maintenance cost prediction approach integrating climate and traffic scenarios.Using high-resolution data on pavement depth and materials,it evaluates future impacts on maintenance costs in Western Australia,and advances sustainable spatial planning under climate change through geospatial,decision-oriented analysis.The results show that without intervention,traffic and climate change could significantly increase road maintenance costs by 2050.Under an equivalent service-improvement target of a 1.0-point reduction in network-average International Roughness Index,adopting climate-adaptive pavement standards reduces life-cycle maintenance costs by 16.1%relative to the baseline scenario,while trafficmanagement-based redistribution reduces costs by 17.0%relative to the same baseline scenario.Integrating climate adaptation into road maintenance standards provides more accurate,actionable recommendations for policymakers and engineers to enhance infrastructure resilience,reduce long-term costs,and safeguard against the adverse climate change impacts on transportation networks. 展开更多
关键词 Climate adaptation Road maintenance Predictive modeling Life-cycle cost analysis Traffic management
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Accurate Real-Time Measurement of Small and Irregular Road Abandoned Objects Using a Lightweight Vision-Based Framework 认领 引用
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作者 Ying Tang Chuanyi Ma +1 位作者 Feng Guo Wenhao Sun 《Computers, Materials & Continua》 SCIE EI 2026年第8期1535-1557,共23页
Road Abandoned Objects(RAOs)pose significant threats to traffic safety,particularly due to their small size,irregular shapes,and unpredictable distribution in complex road environments.The primary objective of this st... Road Abandoned Objects(RAOs)pose significant threats to traffic safety,particularly due to their small size,irregular shapes,and unpredictable distribution in complex road environments.The primary objective of this study is to develop an accurate and real-time detection framework for RAOs while maintaining low computational cost for practical deployment.To achieve this,we propose RAO-YOLO,a lightweight vision-based detection framework built upon an enhanced YOLO architecture.Specifically,a Mixed Aggregation Network(MANet)is introduced to improve multi-scale feature representation,and a Lightweight Shared Detail-Enhanced Detection(LSDD)head is designed to enhance localization accuracy for small and irregular objects.Furthermore,a Focal-MPDIoU loss function is proposed to address sample imbalance and geometric irregularity during training.Extensive experiments conducted on the RAOD dataset demonstrate that the proposed method achieves superior performance compared to state-of-the-art detectors,achieving a mAP@0.5:0.95 of 56.1%while maintaining real-time inference speed.These results validate the effectiveness of the proposed framework for practical intelligent transportation applications. 展开更多
关键词 Road abandoned objects real-time object detection road safety intelligent transportation systems
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Impacts of Soil Moisture–Atmosphere Coupling on the Silk Road Pattern in Summer 认领 引用
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作者 Jing WANG Siguang ZHU +1 位作者 Haishan CHEN Fei FENG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第6期1182-1197,共16页
Based on CMIP6 model simulations,this study investigates the impacts and mechanisms of soil moisture–atmosphere coupling(SA)on the Silk Road Pattern(SRP)in the Northern Hemisphere summer.A comparison between LS3MIP(u... Based on CMIP6 model simulations,this study investigates the impacts and mechanisms of soil moisture–atmosphere coupling(SA)on the Silk Road Pattern(SRP)in the Northern Hemisphere summer.A comparison between LS3MIP(uncoupled)and AMIP(coupled)experiments reveals that weakened SA alters both the position and intensity of the SRP wave train centers,showing a positive–negative–positive–negative anomalous distribution around 40°N(in meridional wind pattern).The results indicate that the SA in the Tibetan Plateau(TP)region plays an important role in the distribution of the SRP.Furthermore,SA significantly influences the SRP wave train characteristics in midlatitude regions by regulating surface heat fluxes and atmospheric heat sources(),with notable geopotential height anomalies over the Caspian Sea,the TP and Northeast Asia.Specifically,due to the weakening of the SA,the cooling effect over the TP induces subsidence,while the regions surrounding the Caspian Sea and Northeast Asia exhibit heat source anomalies accompanied by ascending motion.This results in a corresponding positive–negative–positive geopotential height anomaly pattern associated with the SRP,ultimately influencing the wave train distribution of the SRP.Thus,SA is an important factor driving the variability of the SRP wave train. 展开更多
关键词 soil moisture-atmosphere coupling Silk Road Pattern LS3MIP atmospheric heat sources
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Fuzzy control strategy of hydraulic road pressure power generation system 认领 引用
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作者 Shun-Hang Zhang Hong-Jun Cui +1 位作者 Li-Jie Ren Zhi-Hua Wang 《Clean Energy》 EI CSCD 2026年第3期59-72,共14页
Vehicles traveling on roads produce substantial pressure energy,which offers a novel approach to addressing the power supply needs of roadside facilities.This study proposes a hydraulic energy storage-based road press... Vehicles traveling on roads produce substantial pressure energy,which offers a novel approach to addressing the power supply needs of roadside facilities.This study proposes a hydraulic energy storage-based road pressure power generation system and develops a system model that delineates the transmission path of wheel pressure energy when a vehicle passes.It also investigates the impacts of different vehicle types and operating speeds on the power generation system.Theoretical models are established for pressure energy capture,hydraulic energy storage,proportional flow valves,as well as torque balance and power transmission between hydraulic motors and generators.A dual-target fuzzy control strategy is proposed to regulate both the opening pressure of the accumulator and the opening degree of the proportional flow valve,thereby enhancing the stability of the system’s output.Simulation and experimental results demonstrate that the adoption of this two-stage fuzzy control strategy enables the energy storage unit to select the optimal opening pressure according to real-time traffic conditions,stabilize the flow rate of the energy release unit,and improve the power generation efficiency of the system.This work lays a solid theoretical foundation for the collection and utilization of road pressure energy. 展开更多
关键词 road pressure power generation energy conversion hydraulic energy storage generator fuzzy control
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Post-earthquake road accessibility assessment in mountainous counties incorporating geological hazard density correction:A case study of Pingshan County,Hebei Province 认领 引用
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作者 Guo Qiu-na Zhang He +3 位作者 Wang Hong-yu Yang Fan Li Jiang Liu Si-yu 《Applied Geophysics》 SCIE CSCD 2026年第2期607-619,868,共13页
Based on an earthquake-damage-based road traffic capacity assessment model,this paper innovatively introduces the spatial aggregation density of geological hazards as a correction factor to construct a multi-factor we... Based on an earthquake-damage-based road traffic capacity assessment model,this paper innovatively introduces the spatial aggregation density of geological hazards as a correction factor to construct a multi-factor weighted traffi c capacity assessment model.The study systematically investigates the variation patterns of road traffi c capacity in Pingshan County under diff erent seismic intensities.The results show that the impact of earthquakes on road traffi c capacity in Pingshan County exhibits signifi cant spatial heterogeneity,with the western mountainous area being signifi cantly more aff ected than the eastern plain area.As seismic intensity increases,road traffic capacity decreases in a stepwise manner;the higher the intensity,the more pronounced the east-west diff erence.County roads and roads in the western mountainous area are the weak links in earthquake relief eff orts.This study provides a scientifi c basis for post-earthquake emergency route optimization and regional disaster prevention planning. 展开更多
关键词 road traffi c capacity geological hazards seismic intensity
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When the road bends:a novel use of guide catheter extension in overcoming catheter kink to facilitate stent delivery 认领 引用
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作者 Talupula Ram Manohar Velaga Anup +2 位作者 Pothineni Ramesh Babu Shaik Mohammad Noor Rayana Supriya 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2026年第5期330-332,共3页
Percutaneous coronary intervention(PCI)via the transradial route is now standard practice,particularly in elderly patients,owing to its lower bleeding risk and early ambulation.However,agerelated vascular changes such... Percutaneous coronary intervention(PCI)via the transradial route is now standard practice,particularly in elderly patients,owing to its lower bleeding risk and early ambulation.However,agerelated vascular changes such as radial and subclavian tortuosity,elongation,and reduced arterial compliance can pose unique procedural challenges.One such challenge is catheter kinking,which can impede the smooth delivery of stents. 展开更多
关键词 percutaneous coronary intervention pci via percutaneous coronary intervention transradial route guide catheter extension road bending catheter kinkingwhich reduced arterial compliance stent delivery
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TCR-RoadNet:A Transformer-Enhanced Multi-Task Deep Learning Architecture for Real-Time Road Damage Detection and Segmentation 认领 引用
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作者 Olzhas Olzhayev Bakhytzhan Kulambayev Azizah Suliman 《Computers, Materials & Continua》 SCIE EI 2026年第9期1024-1053,共30页
Automated road damage detection is a critical component of intelligent transportation systems,enabling efficient infrastructure maintenance and improved traffic safety.However,existing approaches often suffer from lim... Automated road damage detection is a critical component of intelligent transportation systems,enabling efficient infrastructure maintenance and improved traffic safety.However,existing approaches often suffer from limited contextual understanding,insufficient segmentation accuracy,and suboptimal real-time performance.This study presents TCR-RoadNet,a transformer-enhanced multi-task deep learning architecture designed for simultaneous road damage detection and segmentation in real-world driving environments.The proposed framework integrates a multi-scale convolutional backbone with a Transformer Context Refinement(TCR)module to capture both fine-grained structural details and long-range spatial dependencies across feature scales.To further enhance performance,a Decoupled Detection Head(DDH)is employed to stabilize localization and classification learning,while a Classification Refinement Module(CRM)improves inter-class discrimination using region-based feature enhancement.In addition,a Boundary-Aware Segmentation Head is introduced to generate precise damage contours by incorporating edge-sensitive learning mechanisms.The model is evaluated on the RDD2022 dataset,complemented by an extended dataset containing additional road images collected from Kazakhstan to increase environmental diversity and robustness.Experimental results demonstrate that the proposed method achieves 0.9416 precision,0.9235 recall,and 0.8718 mAP@50,along with a segmentation performance of 0.8129 mean Intersection over Union(mIoU),while maintaining real-time inference at 57 FPS.Comparative analysis and ablation studies confirm that each architectural component contributes to consistent performance gains in both detection and segmentation tasks.Qualitative results further illustrate the robustness of the proposed framework under varying lighting,weather,and road conditions.The proposed approach offers a scalable and efficient solution for real-time road condition monitoring and intelligent infrastructure management systems. 展开更多
关键词 Road damage detection pavement defect segmentation transformer computer vision multi-task deep learning intelligent transportation systems
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An Overview of Drag Reduction Methods in Road Cars 认领 引用
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作者 Umberto Ravelli Silvia Ravelli 《Fluid Dynamics & Materials Processing》 EI 2026年第2期1-41,共41页
Aerodynamic research on road cars was reviewed in this work under the thread of reducing drag,with the awareness that this may succeed in effectively decreasing the carbon footprint of transportation.First,a selection... Aerodynamic research on road cars was reviewed in this work under the thread of reducing drag,with the awareness that this may succeed in effectively decreasing the carbon footprint of transportation.First,a selection of studies was presented to focus on the most important aerodynamic features of the flow around realistic car body shapes.Then,the discussion was organized around three pillars related to passive flow control,active flow control and active aerodynamics.Both experimental and numerical investigations were included to provide a comprehensive overview.A clear distinction was made between simplified and realistic car models,as well as production vehicles(within the limits of restricted access information).Moreover,a short essay was dedicated to electric vehicles,for which aerodynamics matters,especially at highway speeds.Last,the impact of aerodynamic principles on the design of current and future vehicle fleet was assessed,honestly admitting that recent market trends must be reversed to turn decarbonization goals into reality and damp the effects of global warming. 展开更多
关键词 Road cars aerodynamics drag coefficient passive flowcontrol active flowcontrol active aerodynamics
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Emeralds from the Silk Roads:From Myth to Reality 认领 引用
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作者 Marie-Laure Cassius-Duranton Vincent Pardieu Stefanos Karampelas 《宝石和宝石学杂志（中英文）》 CAS 2026年第1期39-54,共16页
Although the emerald deposits in India and the Himalayas were not officially discovered before the 20th century,recent gemological analyses conducted by the LFG(French Gemological Laboratory)on emeralds from historica... Although the emerald deposits in India and the Himalayas were not officially discovered before the 20th century,recent gemological analyses conducted by the LFG(French Gemological Laboratory)on emeralds from historical jewelry dating back to the 16th century have shown that they correspond to the characteristics of the Swat deposits(Pakistan).This discovery is consistent with ancient gemological literature,which,since Theophrastus(4th century BCE),mentions the Himalayas as a source of emeralds.This interdisciplinary article explores the methodological difficulties inherent in historical gemology and highlights the importance of scientific gemology for art history and archaeology. 展开更多
关键词 emerald Silk Road history of gemstones Swat Davdar Colombia Pliny Theophrastus
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