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  1. 761

    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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  2. 762

    The Formation of Double Hot Jupiter Systems through von Zeipel–Lidov–Kozai Migration by Yurou Liu, Tiger Lu, Malena Rice

    Published 2025-01-01
    “…Using N -body simulations, we characterize the evolution of two cold Jupiters, each orbiting one star in a binary system, undergoing mirrored ZLK migration. …”
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  3. 763

    A two stage differential evolution algorithm for parameter estimation of proton exchange membrane fuel cell by Mohammad Aljaidi, Sunilkumar P. Agrawal, Pradeep Jangir, Sundaram B. Pandya, Anil Parmar, Arpita, Ali Fayez Alkoradees, Bhargavi Indrajit Trivedi, Mohammad Khishe

    Published 2025-02-01
    “…Abstract Precise models predicting fuel cell performance under different operating conditions require accurate parameter identification in a proton exchange membrane fuel cell (PEMFC). Most traditional parameter estimation methodologies depend on optimization algorithms which are limited in their efficiency, convergence speed, and robustness. …”
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  8. 768

    A REVIEW OF THE SUSTAINABILITY – CIRCULAR ECONOMY IN THE PHARMACEUTICAL INDUSTRY by Laura-Crina MIRAUTE (COCA), Marius PISLARU

    Published 2024-11-01
    “…The most relevant approaches of the authors to this topic are presented. …”
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  9. 769

    Development of Nursing Research–Directions and Best Practices in the USA and Europe: A Narrative Review by Milena Saleva, Silviya Aleksandrova-Yankulovska

    Published 2022-06-01
    “…Forty-two articles from the USA and Europe were identified and included as the most appropriate in the analysis, published in 22 journals. …”
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    Article
  10. 770

    The European Union's Position in International Trade by Valentina BUTMALAI, Alina Florentina SĂRACU

    Published 2025-04-01
    “…Along with the protection of European companies and consumers, the promotion of EU ideals and values is one of the most crucial components of the EU's trade policy. …”
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  11. 771

    Evolusi Peran Gender dalam Dinamika Politik Lokal: Studi Perempuan dalam Pemilihan Kepala Daerah 2024 by Puji Lestari, Erisandi Arditama, Zuraini binti Jamil, Supraptiwi Supraptiwi

    Published 2025-06-01
    “…Self-confidence in facing social pressure, political pressure, and political pressure is one of the most important factors. …”
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    A mono-center study on pathological types and 15-year epidemiology evolution of primary glomerular diseases by TIAN Kun, DUAN Li-ping, LI Yun, ZHENG Zhao-xia, HU Tian-xiao

    Published 2019-01-01
    “…Objective To investigate pathological types and the evolutional features of epidemiology of primary glomerular disease in adult patients with renal biopsy in Handan, Hebei, China. …”
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    Exploring coupled coordination and synergistic evolution in a multi-dimensional water system of the Yellow River Basin by Huanghao Yu, Binquan Li, Huiming Zhang, Zeling Ren, Maihuan Zhao, Xindai An

    Published 2025-07-01
    “…Most cities exhibit high synergy scores (>0.8), whereas downstream scores are systematically lower than midstream values. …”
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  20. 780

    Shape Optimization of Mufflers Composed of Multiple Rectangular Fin-shaped chambers Using Differential Evolution Method by Min-Chie CHIU, Ying-Chun CHANG, Wei-Ting TAI

    Published 2015-05-01
    “…There has been considerable research done on multi-chamber mufflers used in the elimination of industrial venting noise. However, most research has been restricted to lower frequencies using the plane wave theory. …”
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