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Influence of mesoscale eddies on ocean surface waves in strong current zones based on eddy interior region wavecurrent directional partitioning 认领 引用
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作者 Jintong Zhu Yong Wan +3 位作者 Chenqing Fan Qiushuang Yan Junmin Meng Jungang Yang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第1期30-48,共19页
Mesoscale eddies exhibit characteristic annular surface current structures and contain substantial eddy kinetic energy,which significantly modulates ocean surface wave parameters and energy distribution.Following prev... Mesoscale eddies exhibit characteristic annular surface current structures and contain substantial eddy kinetic energy,which significantly modulates ocean surface wave parameters and energy distribution.Following previous studies on wave-current interactions,this study further identified mesoscale eddies using Archiving,Validation and Interpretation of Satellite Oceanographic satellite altimetry data.By integrating observations from the China-France Oceanography Satellite Surface Wave Investigation and Monitoring with reanalysis datasets from the Copernicus Marine Environment Monitoring Service on waves and currents,three representative regions with strong currents are selected for study:the Gulf of Mexico,the Kuroshio Extension,and the Agulhas.The eddy interior is categorized into zones based on the relative propagation directions of waves and currents,distinguishing between wave-current co-directional and counterdirectional zones.This new wave-current partitioning perspective enables a systematic investigation of how the internal structures of mesoscale eddies modulate key ocean surface wave parameters,including significant wave height(SWH),wavelength,wave direction,and wave spectrum.The results indicate that variations in wavelength and wave direction induced by mesoscale eddies exhibit strong spatial consistency,with the largest absolute changes predominantly occurring in wave-current co-directional zones.In contrast,changes in SWH are relatively small and more susceptible to the influence of other oceanic factors,making it difficult to observe consistent variation patterns across different regions.Further analysis of wave spectra shows that wave energy tends to converge in wave-current counter-directional zones,while divergence is typically observed in co-directional zones.Building on the theories of wave-current interaction and wave dispersion,this study also examines the influence of eddy dynamic parameters such as vorticity,divergence,strain,and deformation rate on wave characteristics across different wave-current directional partitioning. 展开更多
关键词 mesoscale eddies ocean surface wave wave-current interactions
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Preferences of Chinese Dermatologists for Large Language Model Responses in Clinical Psoriasis Scenarios:A Nationwide Cross-Sectional Survey in China 认领 引用
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作者 Jungang Yang Jingkai Xu +6 位作者 Xuejiao Song Chengxu Li Lili Chen Lingbo Bi Tingting Jiang Xianbo Zuo Yong Cui 《Health Care Science》 CSCD 2026年第1期40-48,共9页
Background:Large language models(LLMs)have shown considerable promise in supporting clinical decision-making.However,their adoption and evaluation in dermatology remains limited.This study aimed to explore the prefere... Background:Large language models(LLMs)have shown considerable promise in supporting clinical decision-making.However,their adoption and evaluation in dermatology remains limited.This study aimed to explore the preferences of Chinese dermatologists regarding LLM-generated responses in clinical psoriasis scenarios and to assess how they prioritize key quality dimensions,including accuracy,traceability,and logicality.Methods:A cross-sectional,web-based survey was conducted between December 25,2024,and January 22,2025,following the Checklist for Reporting Results of Internet E-Surveys guidelines.A total of 1247 valid responses were collected from practicing dermatologists across 33 of China's provincial-level administrative divisions.Participants evaluated responses to five categories of clinical questions(etiology,clinical presentation,differential diagnosis,treatment,and case study)generated by five LLMs:ChatGPT-4o,Kimi.ai,Doubao,ZuoYiGPT,and Lingyi-agent.Statistical associations between participant characteristics and model preferences were examined using chi-square tests.Results:ChatGPT-4o(Model 1)emerged as the most preferred model across all clinical tasks,consistently receiving the highest number of votes in case study(n=740),clinical presentation(n=666),differential diagnosis(n=707),etiology(n=602),and treatment(n=656).Significant variation in model preference by professional title was observed only for the differential diagnosis task(χ2=21.13,df=12,p=0.0485),while no significant differences were found across hospital tiers(p>0.05).In terms of evaluation dimensions,accuracy was most frequently rated as“very important”(n=635).A significant association existed between hospital tier and the most valued dimension(χ2=27.667,df=9,p=0.0011),with dermatologists in primary hospitals prioritizing traceability more than their peers in higher-tier hospitals.No significant associations were found across professional titles(p=0.127).Conclusions:Chinese dermatologists suggest a strong preference for ChatGPT-4o over domestic LLMs in psoriasis-related clinical tasks.While accuracy remains the primary criterion,traceability and logicality are also critical,particularly for clinicians in lower-tier hospitals.These findings suggest that future clinical LLMs should prioritize not only content accuracy but also source transparency and structural clarity to meet the diverse needs of different clinical settings. 展开更多
关键词 dermatology large language model model evaluation
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A new automatic oceanic mesoscale eddy detection method using satellite altimeter data based on density clustering 认领 引用 被引量：2
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作者 Jitao Li Yongquan Liang +3 位作者 Jie Zhang Jungang Yang Pingjian Song Wei Cui 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第5期134-141,共8页
The mesoscale eddy is a typical mesoscale oceanic phenomenon that transfers ocean energy. The detection and extraction of mesoscale eddies is an important aspect of physical oceanography, and automatic mesoscale eddy ... The mesoscale eddy is a typical mesoscale oceanic phenomenon that transfers ocean energy. The detection and extraction of mesoscale eddies is an important aspect of physical oceanography, and automatic mesoscale eddy detection algorithms are the most fundamental tools for detecting and analyzing mesoscale eddies. The main data used in mesoscale eddy detection are sea level anomaly(SLA) data merged by multi-satellite altimeters' data.These data objectively describe the state of the sea surface height. The mesoscale eddy can be represented by a local equivalent region surrounded by an SLA closed contour, and the detection process requires the extraction of a stable closed contour structure from SLA maps. In consideration of the characteristics of mesoscale eddy detection based on SLA data, this paper proposes a new automatic mesoscale eddy detection algorithm based on clustering. The mesoscale eddy structure can be extracted by separating and filtering SLA data sets to separate a mesoscale eddy region and non-eddy region and then establishing relationships among eddy regions and mapping them on SLA maps. This paper overcomes the problem of the sensitivity of parameter setting that affects the traditional detection algorithm and does not require a sensitivity test. The proposed algorithm is thus more adaptable. An eddy discrimination mechanism is added to the algorithm to ensure the stability of the detected eddy structure and to improve the detection accuracy. On this basis, the paper selects the Northwest Pacific Ocean and the South China Sea to carry out a mesoscale eddy detection experiment. Experimental results show that the proposed algorithm is more efficient than the traditional algorithm and the results of the algorithm remain stable. The proposed algorithm detects not only stable single-core eddies but also stable multi-core eddy structures. 展开更多
关键词 mesoscale eddy density clustering shape discrimination outermost closed contour
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Primary Analysis of Oceanic Mesoscale Eddies Observation Abilities by Sentinel-3A SRAL 认领 引用 被引量：5
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作者 Jungang YANG Jie ZHANG +2 位作者 Wei CUI Munoz MAITE Makhoul EDUARD 《Journal of Geodesy and Geoinformation Science》 CSCD 2021年第1期56-62,共7页
In this study,the north-western Pacific Ocean of Kuroshio region is selected as the experimental area to analyze the mesoscale eddies observation abilities of Sentinel-3 A SRAL,including the independent detection abil... In this study,the north-western Pacific Ocean of Kuroshio region is selected as the experimental area to analyze the mesoscale eddies observation abilities of Sentinel-3 A SRAL,including the independent detection abilities of Sentinel-3 A SRAL and the improvement of mesoscale eddies detection abilities by data fusion with other satellite altimetry data.The Sentinel-3 A SRAL data are mapped by the spatial-temporal objective analysis method to the sea level anomaly grid data.The mapping errors are analyzed by the comparisons between the grid data of different combinations and along the ground track of Jason-2/3.The independent detection abilities of Sentinel-3 A SRAL are analyzed by the comparison between the grid data and the AVISO MSLA data.On the other hand,through the multi-satellite data fusion of different combinations of Sentinel-3 A altimeter and other satellite altimeters such as Jason-2/3,the mesoscale eddies detection was performed based on the merged sea level anomaly data and the addition of Sentinel-3 A SRAL data for the improvements of mesoscale eddies detection abilities by multi-satellite altimeters are concluded.It is concluded that Sentinel-3 A SRAL has good abilities of mesoscale eddies detection as the combination of Jason-2 and Jason-3,and it is better than that of single altimeter of Jason-2 or Jason-3. 展开更多
关键词 Sentinel-3 altimeter mesoscale eddy
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Intuitionistic Fuzzy Petri Nets Model Based on Back Propagation Algorithm for Information Services 认领 引用 被引量：1
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作者 Junhua Xi Kouquan Zheng +2 位作者 Jianfeng Ma Jungang Yang Zhiyao Liang 《Computers, Materials & Continua》 SCIE EI 2020年第5期605-619,共15页
Intuitionistic fuzzy Petri net is an important class of Petri nets,which can be used to model the knowledge base system based on intuitionistic fuzzy production rules.In order to solve the problem of poor self-learnin... Intuitionistic fuzzy Petri net is an important class of Petri nets,which can be used to model the knowledge base system based on intuitionistic fuzzy production rules.In order to solve the problem of poor self-learning ability of intuitionistic fuzzy systems,a new Petri net modeling method is proposed by introducing BP(Error Back Propagation)algorithm in neural networks.By judging whether the transition is ignited by continuous function,the intuitionistic fuzziness of classical BP algorithm is extended to the parameter learning and training,which makes Petri network have stronger generalization ability and adaptive function,and the reasoning result is more accurate and credible,which is useful for information services.Finally,a typical example is given to verify the effectiveness and superiority of the parameter optimization method. 展开更多
关键词 Intuitionistic fuzzy set intuitionistic fuzzy Petri nets production rule BP algorithm
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Statistical characteristics and thermohaline properties of mesoscale eddies in the Bay of Bengal 认领 引用 被引量：1
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作者 Wei Cui Chaojie Zhou +1 位作者 Jie Zhang Jungang Yang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2021年第4期10-22,共13页
The statistical characteristics and vertical thermohaline properties of mesoscale eddies in the Bay of Bengal are studied from the view of satellite altimetry data and Argo profiles.Eddy propagation preferences in dif... The statistical characteristics and vertical thermohaline properties of mesoscale eddies in the Bay of Bengal are studied from the view of satellite altimetry data and Argo profiles.Eddy propagation preferences in different lifetimes,eddy evolution process,and geographical distribution of eddy kinetic properties are analyzed in this area.Eddies exist principally in the western Bay of Bengal,and most of them propagate westward.There is a clear southward(equatorward)preference for eddies with long lifetimes,especially for cyclones.Moreover,the eddies in different areas of the bay show different north-southward preferences.Evolution of eddy kinetic properties with lifetime shows that eddies have the significant three-stage feature:the growth period in the former one-fifth lifetime,the stable period in the middle two-fifth to four-fifth lifetime,and the dying period in the last one-fifth lifetime.Large-amplitude and high-intensity eddies occur only in the relatively confined regions of highly unstable currents,such as the East Indian Coastal Current and eastern Sri Lanka.Based on Argo profile data and climatology data,the eddy synthesis method was used to construct three-dimensional temperature and salt structures of eddies in this area.The mean temperature anomaly is negative/positive to the cyclonic/anticyclonic eddies in the upper 300×104Pa,and below this depth,the anomaly becomes weak.The salinity structures of positive anomalies inside cyclonic eddies and negative anomalies inside anticyclonic eddies in the Bay of Bengal are not consistent with other regions.Due to the special characteristics of the water mass in the bay,especially under the control of the low-salinity Bay of Bengal water at the surface and the Indian equatorial water in the deep ocean,the salinity of seawater shows a monotonic increase with depth.For regional varieties of temperature and salinity structures,as the eddies move westward,the temperature anomaly induced by the eddies increases,the effecting depth of the eddies deepens,and the salinity structures are more affected by inflows.In the north-south direction,the salinity structures of the eddies are associated with the local water masses,which comprise lowsalinity water in the northern bay due to the inflow of freshwater from rivers and salty water in the southern bay due to the invasion of Arabian Sea high-salinity water from the north Indian Ocean. 展开更多
关键词 mesoscale eddy Bay of Bengal thermohaline structures satellite altimetry Argo data
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Preliminary results of the global ocean tide derived from HY-2A radar altimeter data 认领 引用 被引量：1
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作者 Jungang Yang Yongjun Jia +1 位作者 Chenqing Fan Wei Cui 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2023年第2期65-73,共9页
The HY-2A satellite,which is equipped with a radar altimeter and was launched on August 16,2011,is the first Chinese marine dynamic environmental monitoring satellite.Extracting ocean tides is one of the important app... The HY-2A satellite,which is equipped with a radar altimeter and was launched on August 16,2011,is the first Chinese marine dynamic environmental monitoring satellite.Extracting ocean tides is one of the important applications of the radar altimeter data.The radar altimeter data of the HY-2A satellite from November 1,2011 to August 16,2014 are used herein to extract global ocean tides.The constants representing the tidal constituents are extracted by HY-2A RA data with harmonic analysis based on the least squares method.Considering tide aliasing issues,the analysis of the alias periods and alias synodic periods of different tidal constituents shows that only the tidal constituents M2,N2,and K2are retrieved precisely by the HY-2A RA data.The derived tidal constants of the tidal constituents M2,N2and K2are compared to those of tidal gauge data and the TPXO tide model results.The comparison between the derived results and the tidal gauge data shows that the RMSEs of the tidal amplitude and phase lag are 9.6 cm and 13.34°,2.4 cm and 10.47°,and 8.1 cm and 14.19°for tidal constituents M2,N2,and K2,respectively.The comparisons of the semidiurnal tides with the TPXO model results show that tidal constituents have good consistency with the TPXO model results.These findings confirm the good performance of HY-2A RA for retrieving semidiurnal tides in the global ocean. 展开更多
关键词 HY-2A satellite radar altimeter ocean tide tide analysis
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Identification and census statistics of multicore eddies based on sea surface height data in global oceans 认领 引用
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作者 Wei Cui Wei Wang +1 位作者 Jie Zhang Jungang Yang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2020年第1期41-51,共11页
This study produced a statistical analysis of multicore eddy structures based on 23 years’ altimetry data in global oceans. Multicore structures were identified using a threshold-free closed-contour algorithm of sea ... This study produced a statistical analysis of multicore eddy structures based on 23 years’ altimetry data in global oceans. Multicore structures were identified using a threshold-free closed-contour algorithm of sea surface height, which was improved for this study in respect of certain technical details. Meanwhile a more accurate definition of eddy boundary was used to estimate eddy scale. Generally, multicore structures, which have two or more closed eddies of the same polarity within their boundaries, represent an important transitional stage in their lives during which the component eddies might experience splitting or merging. In comparison with global eddies, the lifetimes and propagation distances of multicore eddies were found to be much smaller because of their inherent structural instability. However, at the same latitude, the spatial scale of multicore eddies was found larger than that of single-core eddies, i.e., the eddy area could be at least twice as large. Multicore eddies were found to exhibit some features similar to global eddies. For example, multicore eddies tend to occur in the Antarctic Circumpolar Current, some western boundary currents, and mid-latitude regions around 25°N/S, the majority(70%) of eddies propagate westward while only 30% propagate eastward, and large-amplitude eddies are restricted mainly to reasonably confined regions of highly unstable currents. 展开更多
关键词 satellite altimetry mesoscale eddy multicore structure eddy identification eddy characteristic
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Shallow sea topography detection using fully Polarimetric Gaofen-3 SAR data based on swell patterns 认领 引用 被引量：1
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作者 Longyu Huang Chenqing Fan +2 位作者 Junmin Meng Jungang Yang Jie Zhang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2023年第2期150-162,共13页
Compared to single-polarization synthetic aperture radar(SAR)data,fully polarimetric SAR data can provide more detailed information of the sea surface,which is important for applications such as shallow sea topography... Compared to single-polarization synthetic aperture radar(SAR)data,fully polarimetric SAR data can provide more detailed information of the sea surface,which is important for applications such as shallow sea topography detection.The Gaofen-3 satellite provides abundant polarimetric SAR data for ocean research.In this paper,a shallow sea topography detection method was proposed based on fully polarimetric Gaofen-3 SAR data.This method considers swell patterns and only requires SAR data and little prior knowledge of the water depth to detect shallow sea topography.Wave tracking was performed based on preprocessed fully polarimetric SAR data,and the water depth was then calculated considering the wave parameters and the linear dispersion relationships.In this paper,four study areas were selected for experiments,and the experimental results indicated that the polarimetric scattering parameterαhad higher detection accuracy than quad-polarization images.The mean relative errors were 14.52%,10.30%,12.56%,and 12.90%,respectively,in the four study areas.In addition,this paper also analyzed the detection ability of this model for different topographies,and the experiments revealed that the topography could be well recognized when the topography gradient is small,the topography gradient direction is close to the wave propagation direction,and the isobath line is regular. 展开更多
关键词 fully polarimetric SAR shallow sea topography Gaofen-3 swell patterns
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Short-term nitrogen pulse affects nitrogen fixation and ammonia oxidation in biocrusts:New insights into dryland nitrogen dynamics 认领 引用
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作者 Wei Hang Waseem Shoukat +9 位作者 Zihan Kan Shihang Zhang Jungang Yang Rongliang Jia Ye Tao Bengfeng Yin Huiliang Liu Yongxing Lu Yuanming Zhang Xiaobing Zhou 《Soil Ecology Letters》 CAS CSCD 2026年第4期125-138,共14页
In drylands,biocrusts function as essential components of the nitrogen cycle and display pronounced sensitivity to external nitrogen inputs.Episodic rainfall events can mobilize dry-deposited nitrogen into short-term ... In drylands,biocrusts function as essential components of the nitrogen cycle and display pronounced sensitivity to external nitrogen inputs.Episodic rainfall events can mobilize dry-deposited nitrogen into short-term pulse that influences nitrogen retention and transformation.However,the effects of short-term nitrogen pulse,commonly encountered in drylands,on biocrust nitrogen dynamics remain poorly understood.This study simulates rainfall-driven short-term nitrogen pulse to examine how varying pulse concentrations impact biocrusts nitrogen fixation,ammonia oxidation,and overall nitrogen balance under conditions of intensi-fied nitrogen deposition after a 13-year nitrogen addition experiment in Gurbantunggut Desert.The nitrogen pulse sharply disrupted biocrusts'nitrogen cycling.Both nitrogen fixation and ammonia oxidation rates declined precipitously immediately after the pulse.However,within 14–21 days,these rates rebounded to or even surpassed pre-pulse levels.This pattern reflects the biocrusts'acute sensitivity to nitrogen perturbations,as well as their ecological resilience.Over 21 days,cumulative nitrogen fixation decreased by 47%–72%relative to the control,indicating suppression by nitrogen addition;in contrast,cumulative ammonia oxidation increased by 39%–91%but stabilized at moderate to high nitrogen inputs(≥1.0 g N m–2 yr–1,N1.0),revealing a saturation threshold.Moreover,the risk of nitrogen loss increased with higher nitrogen concentrations and plateaued at approximately an 88%elevation under N1.0,indicating that high nitrogen inputs exacerbate biocrusts nitrogen-loss vulnerabi-lity.These findings elucidate the impacts of acute nitrogen pulse on nitrogen dynamics in biocrusts,highlighting that amid escalating global nitrogen deposition,precise evaluation of nitrogen balance in drylands must integrate pulse effects,biocrusts nitrogen-carrying capacity,input modes,concentrations,durations,and interactions with environmental conditions. 展开更多
关键词 biocrusts nitrogen pulse nitrogen fixation ammonia oxidation
MPGK:A user-friendly tool for Mendelian randomization,polygenic risk score,Geno Ontology,and the Kyoto Encyclopedia of Genes and Genomes analysis 认领 引用
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作者 Jungang Yang Xuejiao Song +3 位作者 Jingkai Xu Yue Yang Xianbo Zuo Yong Cui 《Chinese Medical Journal》 SCIE CAS CSCD 2026年第10期1532-1537,共6页
Background:Mendelian randomization(MR),polygenic risk score(PRS),Geno Ontology(GO),and the Kyoto Encyclopedia of Genes and Genomes(KEGG)are powerful bioinformatic analysis tools.However,the analysis of MR,PRS,GO,and K... Background:Mendelian randomization(MR),polygenic risk score(PRS),Geno Ontology(GO),and the Kyoto Encyclopedia of Genes and Genomes(KEGG)are powerful bioinformatic analysis tools.However,the analysis of MR,PRS,GO,and KEGG may pose a challenge for novices.This article intends to introduce a program that adeptly guides beginners in implementing these analysis functions,ensuring that even those new to the field can confidently use them.Methods:The MPGK program was developed to run on the command line.It conveniently implements the MR,PRS,GO,and KEGG analysis functions by calling well-written R programs.The results of our analyses were validated using genome-wide association study(GWAS)summary data for diabetes and psoriasis,as well as gene sequencing data for diabetes.Results:Three demo analyses using the MPGK program demonstrate the comprehensive capabilities of the MPGK program in conducting advanced bioinformatics analysis.First,the MPGK program revealed a causal relationship between diabetes and psoriasis.Additionally,the PRS analysis generated polygenic risk scores for diabetes,demonstrating the implementation of PRS analysis within the MPGK framework.Furthermore,the GO and KEGG analyses indicated that psoriasis is associated with infection and T helper 17 cells.These findings are consistent with the previous literature.Conclusion:MPGK can be easily used to perform comprehensive analysis,including MR,PRS,GO,and KEGG analyses,by both beginners and researchers. 展开更多
关键词 MPGK Mendelian randomization Polygenic risk score Gene Ontology Kyoto Encyclopedia of Genes and Genomes
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