Showing 121 - 140 results of 465 for search 'surface average standards', query time: 0.10s Refine Results
  1. 121

    Analysis of Vehicle–Bridge Coupling Vibration for Corrugated Steel Web Box Girder Bridges Considering Three-Dimensional Pavement Roughness by Luchuan Chen, Haixia Ma, Huaizao Xiao, Fengjiang Qin, Jin Di, Xiaodong Chen, Jie Wang

    Published 2025-04-01
    “…As pavement conditions worsen, the impact factor shows an upward trend, with each grade of road surface deterioration resulting in an average 19.1% increase in the impact factor. …”
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    Article
  2. 122

    Analysis of operation efficiency and carbon emission of quasi Class Ⅳ upgrading and reconstruction of a sewage treatment plant by YU Bo, MA Jiao, LI Xiaoning, SHEN Pengfei

    Published 2024-10-01
    “…The effluent quality(except TN) reached the Class Ⅳ standard of the Environmental Quality Standards for Surface Water(GB 3838-2002). …”
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  3. 123

    Life Cycle Assessment (LCA) of Carbon Emission of Garden Pavement by Peiyong WANG, Ruixing LU

    Published 2025-01-01
    “…Conclusions1) Enhance the durability of surface materials. The amount of average annual carbon emissions of surface materials over the life cycle of such materials is closely related to their durability. …”
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  4. 124

    Experimental Study on Fire-Resistance Performance Depending on the Applied Volume of Firestop Material in Metallic and Nonmetallic Penetration Systems by Hong-Beom Choi, A-Yeong Jeong, Jin-O Park, Seung-Yong Hyun, Hyung-Do Lee

    Published 2025-06-01
    “…When the firestop-to-opening area ratio decreased from 95–91%, the maximum temperature on the unexposed surface was, on average, 15–30 °C lower, confirming that modest reductions in firestop material volume for small openings do not compromise performance. …”
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    Article
  5. 125

    High-performance nanostructured SiO2 from Ethiopian pumice: synthesis and characterization by Agraw Mulat Muhammud, Gemechu Deressa Edossa, Fedlu Kedir Sabir

    Published 2025-04-01
    “…BET analysis showed an average pore size of 86.63 nm along with a significant specific surface area of 571.48 m2/g. …”
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  6. 126

    Development of a highly sensitive reporter gene cell line for detecting estrogenic activity (the ER Isjaki assay) by Aline Colonnello Montero, Geeta Mandava, Agneta Oskarsson, Johan Lundqvist

    Published 2025-08-01
    “…The proposed changes involve the decrease of the environmental quality standards for 17β-estradiol, estrone and 17α-ethinyl estradiol in surface waters and the obligation to monitor estrogenic substances in water bodies, using effect-based methods. …”
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  7. 127
  8. 128

    Innovative adaptation of coagulation-sedimentation-filtration process in lightly polluted urban rivers with seasonal high turbidity by Yujie Yuan, Tao Zhang, Yaqian Zhao, Yuan Liu, Song He, Yamei Cai, Yuanbo Liu, Shu Wang

    Published 2025-07-01
    “…Results from 10 sampling events showed the average concentrations of COD (15.13–22.00 mg/L), NH3-N (1.15–11.70 mg/L), and TP (0.14–0.26 mg/L), corresponding to Class III–V of China’s environmental quality standards for surface water (EQSSW). …”
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  9. 129
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  12. 132

    Research and Development of P22 Seamless Steel Pipe with Large Diameter and Medium Thick Wall Based on the Φ820mm Precision Skew Rolling Mill by Zheng Shijian, Xu Lujun, Han Renlong, Chen Siying

    Published 2025-08-01
    “…This research and development has the advantages of short process flow, low production cost, high yield, The steel pipe has precise dimensions, good surface quality, and excellent performance. Base-d on the P22 seamless steel pipe produced by Φ820mm precision inclined rolling mill ,combined with the requirement of grade 12Cr2MoG in GB/T 5310-2023 ,,the relevant indicators of P22 seamless steel pipes were analyzed through surface quality inspection, physical and chemical inspection and other methods.After testing, the produced P22 seamless steel pipe had properties as outer diameter deviation of -0.5mm-+6.2mm, ovality of 0.58%, wall thickness deviation of -8.7%-+10.3%, uneven wall thickness of 13.42%, tensile strength of 513 MPa, ,511 MPa, yield strength of 318, MPa, 311 MPa, elongation of 34.0%,33.0%, eaverage impact energy of 257J,242 J at room temperature , average hardness of 153/152 HBW, microstructure of ferrite+bainite+a small amount of pearlite, grain size of 6.0-7.0, and ductile brittle transition temperature below -40 ℃; The results indicate that the chemical composition and various properties of large diameter medium thick walled P22 seamless steel pipes produced by the Φ 820 mm precision skew rolling mill meet the requirements of ASTM A 335/A 335M-24b and other standards.…”
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  13. 133

    Intelligent Casting Quality Inspection Method Integrating Anomaly Detection and Semantic Segmentation by Min-Chieh Chen, Shih-Yu Yen, Yue-Feng Lin, Ming-Yi Tsai, Ting-Hsueh Chuang

    Published 2025-04-01
    “…In the external detection part, we compared five different semantic segmentation models and found that MobileNetV2 performed the best in terms of average accuracy (65.8%). It was incredibly stable when dealing with surface defects with significant shape variations, and the prediction results were more consistent, making it more suitable for introduction into actual production line applications. …”
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  14. 134

    Performance of seawater-derived Mg(OH)2 as a sustainable coating solution for hydrogen sulfide-induced corrosion mitigation in concrete pipes by Janelle Patricia S. Moa, Bea Angela C. Gaw, John Louis O. Co, Kyle Anderson C. Coo, Kenneth Jae T. Elevado, Cheryl Lyne C. Roxas

    Published 2025-02-01
    “…This trend was also reflected in the average post-exposure pH, compressive strength, and surface roughness, with the best performance observed in coatings composed of pure commercially available Mg(OH)₂. …”
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  15. 135

    Validating the Precision and Accuracy of Coral Fragment Photogrammetry by Spencer Miller, Carlo Caruso, Crawford Drury

    Published 2024-11-01
    “…We demonstrate extremely high accuracy (R<sup>2</sup> > 0.999) in determining the surface area and volume of known objects, as well as very high precision (average CV < 0.01) in coral measurements during tests of reproducibility. …”
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  16. 136

    Production of Hybrid Biodiesel from a Novel Ternary Oil Blend: Dual-Stage Process Optimization Using Desirability-Based RSM by Serge Narcisse Nouadjep, César Kapseu, Roland Solimando

    Published 2025-07-01
    “…Process optimization was conducted using response surface methodology and the superposition approach, focusing on temperature, reaction time, ethanol-to-oil ratio, and catalyst concentration to maximize biodiesel yield. …”
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  17. 137

    Experimental study on drag reduction-permeability increase and enhanced displacement of low-rank coal gas by Yong CHEN, Pengfei WANG, Ronghua LIU, Qiao WANG, Kaixin LIU

    Published 2025-05-01
    “…The results show that the liquid phase surface tension can be reduced by 50.41% with 0.05% CTAB and the average liquid phase surface tension can be reduced by 5.50 mN/m with micro-nano bubbles. …”
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  18. 138

    High operative heterogeneous catalyst in biodiesel production from waste cooking oil by R.M. Mohamed, G.A. Kadry, H.A. Abdel-Samad, M.E. Awad

    Published 2020-03-01
    “…The Fourier transform infrared spectroscopy (FTIR) analysis confirmed that the chemical structure consists of sheets of amorphous carbon with hydroxyl and carbonyl (OH and COOH) groups as well as high density of SO3H. The surface area of RS–SO3H and the average pore size were characterized by scanning electron microscopy (SEM) and surface area analyzer. …”
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  19. 139

    Microplastics in the geological-ecological subsystem of the coastal part of the geoecosystem of the Georgian Shelf by V. O. Iemelianov, Ye. I. Nasiedkin, T. S. Kukovska, N. O. Fedoronchuk, S. M. Dovbysh

    Published 2025-06-01
    “…The results of studies on the distribution of microplastics in the surface layer of seafloor sediments in the water area adjacent to the coast of Georgia, conducted by specialists of the State Scientific Institution “MorGeoEcoCenter of the NAS of Ukraine”, are presented. …”
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  20. 140

    Rapid Path Planning Algorithm for Percutaneous Rigid Needle Biopsy Based on Optical Illumination Principles by Jian Liu, Shuai Kang, Juan Ren, Dongxia Zhang, Bing Niu, Kai Xu

    Published 2025-03-01
    “…This simulation generates a grayscale map on the skin surface, highlighting candidate puncture sites. Furthermore, we employ a random forest-based method to model clinician preferences. …”
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