Showing 3,881 - 3,900 results of 4,914 for search '"Earth"', query time: 0.09s Refine Results
  1. 3881
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  3. 3883

    Evaluation of machine learning algorithms in tunnel boring machine applications: a case study in Mashhad metro line 3 by Morteza Abbasi, Amir Hossein Namadchi, Mehdi Abbasi, Mohsen Abbasi

    Published 2024-12-01
    “…Abstract Accurately predicting the performance of Earth Pressure Balance Tunnel Boring Machines (EPB-TBMs) in soft ground conditions is crucial yet challenging due to the complex interaction of geological and operational factors. …”
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  4. 3884
  5. 3885

    Upper bound stability analysis of tiered geosynthetic-reinforced soil wall by Chengzhi Xiao, Xiangsheng Meng, Shan Gao, Luqiang Ding

    Published 2025-01-01
    “…The proposed method was firstly validated by the existing results from the centrifuge test and the numerical method, and then a parametric study was performed to investigate the effects of the cohesionless backfill friction angle φ1 and the wall geometric parameters including the offset distance, the total wall height, the batter angle δ, the number of tiers n, and wall height ratio of adjacent tiers on the dimensionless equivalent earth pressure coefficient KT. The analysis results demonstrated that as the φ1 increases, the shear strength of backfill is enhanced and thus the KT or the total reinforcement tensile force decreases, and the KT decreases with the increase of the offset distance at the initial stage and then becomes stable when it reaches a certain critical value. …”
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  6. 3886
  7. 3887

    Disentangling the Roles of Climate Variables in Forest Fire Occurrences in China by Chenqin Lian, Zhiming Feng, Hui Gu, Beilei Gao

    Published 2024-12-01
    “…Here, using GIS spatial analysis, Pearson correlation, and geographical detector, the climate drivers of forest fires in China are revealed using the 2003–2022 active fire data from the MODIS C6 and climate products from CHELSA (Climatologies at high resolution for the Earth’s land surface areas). The main conclusions are as follows: (1) In total, 82% of forest fires were prevalent in the southern and southwestern forest regions (SR and SWR) in China, especially in winter and spring. (2) Forest fires were mainly distributed in areas with a mean annual temperature and annual precipitation of 14~22 °C (subtropical) and 800~2000 mm (humid zone), respectively. (3) Incidences of forest fires were positively correlated with temperature, potential evapotranspiration, surface downwelling shortwave flux, and near-surface wind speed but negatively correlated with precipitation and near-surface relative humidity. (4) Temperature and potential evapotranspiration dominated the roles in determining spatial variations of China’s forest fires, while the combination of climate variables complicated the spatial variation. …”
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  8. 3888
  9. 3889

    High-Power MHz to 100s of GHz Circuits and Systems for Nuclear Fusion Reactors With Examples From SST-1 and ITER by Kamal K. Samanta

    Published 2024-01-01
    “…Nuclear fusion on earth is a highly complex and challenging multidisciplinary field that aims to solve the global energy puzzle by providing infinite energy with zero carbon emissions. …”
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  10. 3890

    Path Loss Channel Model for Inland River Radio Propagation at 1.4 GHz by Junyi Yu, Wei Chen, Kun Yang, Changzhen Li, Fang Li, Yishui Shui

    Published 2017-01-01
    “…In this paper, a propagation path loss model for inland river is proposed by three improvements compared with the Round Earth Loss (REL) model for open-sea environment. …”
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  11. 3891

    Development and construction of a portable wind tunnel for investigating wind erosion through the application of photogrammetry techniques by Noredin Rostami, Maryam Rabbani, Saman Esmaeilbeigi, Kamyar Hassanpour, Mohammad Hossein Shahmoradi, Mohammad Najafishoa, Zahra Ghobadian, Masood Varshosaz, Mehdi Norianfar

    Published 2025-01-01
    “…Abstract Climate change is one of the most crucial issues in human society such that if it is not given sufficient attention, it can become a great threat to both humans and the Earth. Due to global warming, soil erosion is increasing in different regions. …”
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  12. 3892

    A Safety Case for the Use of Bipolar ±60V DC for Microgrids by Stephen A. Jay, David Clark, Chris Stone, Renke Han, Daniel J. Rogers, Malcolm McCulloch

    Published 2025-01-01
    “…This functionality has been incorporated into a practical system providing protection against series, line-line and line-earth arc faults. A comprehensive touch voltage assessment with reference to IEC 60479 confirms that the proposed system voltage does not present risk of ventricular fibrillation based on values of body impedance corresponding to the 5th percentile of the population.…”
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  13. 3893

    On the Occurrence of GPS Signal Amplitude Degradation for Receivers on Board LEO Satellites by Chao Xiong, Ji‐Sheng Xu, Claudia Stolle, Jose van denIjssel, Fan Yin, Guram N. Kervalishvili, Franz Zangerl

    Published 2020-02-01
    “…In this study we provided the first comparison of the GPS signal amplitude degradations from receivers on board low Earth orbiting satellites at different altitudes. …”
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  14. 3894
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    C-SAR/02 Satellite Polarimetric Calibration and Validation Based on Active Radar Calibrators by Yanan Jiao, Fengli Zhang, Xiaochen Liu, Zhiwei Huang, Jingwen Yuan

    Published 2025-01-01
    “…Quad-polarization synthetic aperture radar (SAR) satellites are important detection tools in Earth observation and remote sensing; in particular, they are of great significance for accurately interpreting radar data and inverting geophysical parameters. …”
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    Study on Developments in Protection Coating Techniques for Steel by Sharun V, Rajasekaran M, S. Suresh Kumar, Vikas Tripathi, Rajneesh Sharma, G. Puthilibai, M. Sudhakar, Kassu Negash

    Published 2022-01-01
    “…Steel, also known as iron alloy, is found 35% of the whole mass of the Earth. It is found in many applications due to its unique properties. …”
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  20. 3900

    Identifying clusters of precipitation for the Brazilian Legal Amazon based on magnitude of trends and its correlation with sea surface temperature by Rodrigo Martins Moreira, Bruno César dos Santos, Trent Biggs, Fernando de Sales, Stefan Sieber

    Published 2024-06-01
    “…In this study, we identify these regions in the Brazilian Legal Amazon based on the magnitude of Sen’s Slope trends using annual precipitation data from September to August, employing the Google Earth Engine platform. Utilizing the silhouette method, we determine four distinct clusters representing zones of homogeneous precipitation patterns. …”
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