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    Study of Low-Level Wind Shear and Its Evolution Based on LIDAR and Aircraft Reports Identification by Jie DING, Lei ZHANG, Zeyong HU, Jiemin WANG, Kaijun ZHANG, Jiening LIANG, Yuan WANG, Zhida ZHANG, Lili XU, Jin WANG, Tao CAI

    Published 2023-10-01
    “…Low-level wind shear significantly impacts aviation safety and operational efficiency.Zhongchuan Airport, located in a mountainous inland region, experiences the influence of complex terrain and weather systems.Wind shear is frequently observed during the summer season.This study analyzes the spatial and temporal characteristics of low-level wind shear events at Zhongchuan Airport using aircraft reports spanning from 2009 to 2018.During the observation period from May 2016 to November 2017, a total of 18 low-level wind shear events were confirmed through aircraft verification.Two methods, namely the fixed and adaptive window methods, were compared to identify wind shear events using LIDAR data from the Windcube 400s-at instrument.The study also explored the continuous evolution and spatial characteristics of the three-dimensional wind shear structure.The results indicate that the frequency of low-level wind shear events has increased at a faster rate compared to the flight volume at Zhongchuan Airport over the past ten years.The peak months for low-level wind shear events at Zhongchuan Airport are April-July and August-October, influenced by local weather patterns.The peak months for low-level wind shear events at Zhongchuan Airport are April-July and August-October, influenced by local weather patterns.Wind shear induced by convective weather occurs in the weak or non-echo region surrounding the convective cloud, resulting from the convergence of updrafts and downdrafts outside the cloud, or the formation of a gust front following the downdraft's contact with the ground.The wind shear factor is correlated with the intensity of radar echoes.Compared to the fixed window method, the adaptive window method had a larger recognition range due to the different data sets included in the recognition window.Therefore, the adaptive window method was found to be more suitable for studying the three-dimensional evolution of wind shear structures.Therefore, the adaptive window method is better suited for studying the evolution of the three-dimensional wind shear structure.The wind shear in the vicinity of Zhongchuan Airport is characterized by a low spatial distribution, small horizontal scale, and short duration, primarily concentrated in the small-scale and γ mesoscale.In other words, the wind shear events occurred at relatively low altitudes, with horizontal scales mostly ranging between 1000~1500 m and 2000~2600 m, lasting less than 20 minutes.Furthermore, 40.5% of the wind shear events were attributed to the movement of the wind, primarily influenced by the background wind.The findings of this study contribute to a better understanding of the characteristics of wind shear, offering valuable insights for the identification, mechanisms, forecasting, and early warning of low-level wind shear events at Zhongchuan Airport.…”
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    Layered high-entropy sulfides: boosting electrocatalytic performance for hydrogen evolution reaction by cocktail effects by Ling Lin, Ziming Ding, Guruprakash Karkera, Thomas Diemant, Dong-Hui Chen, Maximilian Fichtner, Horst Hahn, Jasmin Aghassi-Hagmann, Ben Breitung, Simon Schweidler

    Published 2024-01-01
    “…This study explores high-entropy sulfides (HESs) as potential electrocatalysts for the hydrogen evolution reaction (HER). Novel Pa -3 and Pnma structured HESs containing Fe, Mn, Ni, Co and Mo, were synthesized via a facile mechanochemical method. …”
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  5. 285

    Evolution of Acoustic Emission Characteristics During Soil Shear Testing Based on Active Waveguide System by WU Xin, LIU Yonghong, WANG Xuemei, ZHANG Man

    Published 2025-05-01
    “…The primary objectives are to 1) characterize the behavior of AE signals, including ring count, energy, and <italic>b</italic>‒value, during the soil shear process, 2) analyze the influence of water content and loading rate on AE signal evolution, as these factors significantly affect soil stability, 3) establish a theoretical framework for selecting characteristic indicators that enhance the predictive capabilities of AE technology in monitoring soil slope stability, 4) support the development of more effective monitoring and early warning systems for soil slope sliding, improving the safety and management of infrastructure and human settlements in landslide-prone areas.MethodsThrough a systematic experimental approach, the study aimed to uncover the multifactorial dynamics of AE signals during soil shear, providing valuable insights for the application of AE technology in geotechnical engineering and slope stability assessments. …”
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  6. 286

    Wavefield Evolution and Arrival Behavior of Elastic Wave Propagation in Two-Dimensional Fractional Brownian Fields by Shuaifeng Wang, Zixin Zhang

    Published 2024-12-01
    “…For smaller <i>H</i> values, rougher modulus distributions scatter wave energy more intensely, producing more coda waves and distorted wavefronts, while smoother fields with larger <i>H</i> fields promote smoother wave propagation. …”
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  7. 287

    Structural Course of Surah in the Interpretations of the Holy Quran by Abolfazl Khoshmanesh, Fatemeh Aliyan Nezhadi

    Published 2020-05-01
    “…Such research explains the position of concepts such as thematic unity, unit comprehensiveness, geometrical structure, structural interpretation, and structural order more and better and shows that the formation and evolution of understanding the structure of the surah can be one of the factors and strategies for deriving concepts from the verses and surahs of the Holy Quran.…”
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  8. 288

    Structure of campus network based on reconfigurable architecture by Hu-sheng YUAN, Hua FENG, Hui LI, Zhi-bin ZHONG, Kai PAN

    Published 2013-09-01
    “…Because of the petrifaction of the existing network,it is difficult to achieve the controllability,adaptability and expansibility in current structure.Simultaneously,in order to have better campus network services in teaching,researching and studying,a new structure based on reconfigurable architecture for campus network was designed based on service set handling capacity of various kinds of business in reconfigurable network as the central idea.After the evolution from tradition to flat structure,a more condensed structure was proposed by adopting virtualization technology on switches and routers.It has the advantages of high performance,high reliability,manageability and augmentability.…”
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    Evolutionary game dynamics in populations with heterogenous structures. by Wes Maciejewski, Feng Fu, Christoph Hauert

    Published 2014-04-01
    “…Evolutionary graph theory is a well established framework for modelling the evolution of social behaviours in structured populations. …”
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    Shared regulatory sites are abundant in the human genome and shed light on genome evolution and disease pleiotropy. by Pin Tong, Jack Monahan, James G D Prendergast

    Published 2017-03-01
    “…The association of these shared cis-eQTLs with multiple genes means they also appear to be unusually important in understanding the genetics of human phenotypes and pleiotropy, with shared regulatory sites more often linked to multiple human phenotypes than other regulatory variants. …”
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  13. 293

    Deformation and Evolution of Akata Formation Mudstone in the Niger Delta Basin: Insights from Analogue Models by Shuaiyu Shi, Wenlong Ding, Yixin Yu, Jixin Zhang

    Published 2025-03-01
    “…A relatively thick overburden leads to enhanced gravity spreading, which in turn leads to the formation of larger and more numerous mudstone structures. The formation and evolution of mudstone structures in the Niger Basin involved through three stages: (1) during the Paleocene–Middle Oligocene, thick marine mudstone was deposited; (2) in the Middle Oligocene–Late Oligocene, the mudstone and overlying layers were strongly deformed, and numerous mudstone structures developed with tectonic zonation; and (3) since the Pliocene, the tectonic activity in the basin weakened. …”
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    Numerical Analysis of Concrete Gravity Dam Seepage Characteristics Evolution considering the Calcium Leaching Effect by Kailai Zhang, Liqun Xu, Liting Qiu, Jiacheng Tan, Chao Yang, Kai Zhang

    Published 2021-01-01
    “…During the long-term service life of hydraulic structures, the calcium compounds in cement-based materials decompose in the aqueous environment, leading to the continuous change of seepage characteristics. …”
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  17. 297

    Evolution and transformation of vineyard landscapes and promotion of sustainable viticulture. The case of Boukornine protected area in Tunisia by Abdelkarim Hamrita, Faouzi Haouala, Khouloud Annabi, Rania Kouki, Rania Kouki, Mokhtar Rejili, Bouthaina Al Mohandes Dridi

    Published 2025-07-01
    “…IntroductionThis study investigates the evolution and transformation of vineyard landscapes in the Boukornine region of Tunisia, located near Boukornine National Park. …”
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  18. 298

    Dynamic compression energy evolution and deformation and failure characteristics of limestone under dry-wet cycles by Jichao DUAN, Qi ZONG, Pengfei GAO, Haibo WANG, Nao LYU, Hao WANG

    Published 2025-07-01
    “…As the number of dry-wet cycles increases, structural defects such as pores and microcracks within the samples become more prominent, causing an increase in the maximum principal strain, a decrease in dissipated energy, and an augmentation of the fractal dimension during dynamic compression failure. …”
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  19. 299

    Evolution of grain trade patterns among RCEP member countries and the potential impacts of agreement signing by Minhao Lu, Yingmei Wu, Chao Zhang, Yang Wang, Jiahui Yang, Yi Huang, Yi Wang

    Published 2025-03-01
    “…Such policy measures may reallocate intra-regional trade flows and expand trade volumes while intensifying import competition.DiscussionFrom a complex network perspective, this study provides valuable policy insights for RCEP member countries to leverage their strengths and participate more effectively in agricultural trade.…”
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