Based on the experience of soil sampling in Yuanzegou small watershed,several matters needing attention in soil field sampling are summarized.This paper focuses on the layout of sampling points,soil sample collection,...Based on the experience of soil sampling in Yuanzegou small watershed,several matters needing attention in soil field sampling are summarized.This paper focuses on the layout of sampling points,soil sample collection,soil sample preparation and matters needing attention about potential factors in soil field sampling,with a view to providing reference for undergraduates,master students or non-subject experimenters who are about to carry out experiments in this discipline.展开更多
In the process of in-depth development of water resources management in our country, the national government departments continuously and gradually improve the requirements for on-site water monitoring technology and ...In the process of in-depth development of water resources management in our country, the national government departments continuously and gradually improve the requirements for on-site water monitoring technology and industry quality standards. Only by reducing the monitoring errors that may occur in on-site water sampling monitoring, can the quality accuracy of hydrological analysis monitoring results be better and effectively improved. This paper briefly describes and analyzes several risk factors affecting the on-site water quality sampling management of industrial water and drinking wastewater, and puts forward corresponding risk control measures to promote the continuous improvement of service quality of on-site water quality sampling management of industrial water and drinking wastewater.展开更多
Erratum to 19(5):760-781 Frontiers ofStructural and Civil Engineering 2025,https://doi.org/10.1007/s11709-025-1168-5 The article“Interpretable artificial intelligence approach for understanding shear strength in stab...Erratum to 19(5):760-781 Frontiers ofStructural and Civil Engineering 2025,https://doi.org/10.1007/s11709-025-1168-5 The article“Interpretable artificial intelligence approach for understanding shear strength in stabilized clay soils using real field soil samples”,written by Mohamed Noureddin,Aghyad Al Kabbani,Alejandra Lopez,and Leena Korkiala-Tanttu,was originally published electronically on the publisher's internet portal on May 30,2025 without open access due to an unfortunate oversight during the conversion process.展开更多
Aureococcus anophagefferens, a small pelagophyte algae, has caused brown tide blooms in coastal waters of Qinhuangdao in recent years, presenting significant negative impacts on the shellfish mariculture industry. Und...Aureococcus anophagefferens, a small pelagophyte algae, has caused brown tide blooms in coastal waters of Qinhuangdao in recent years, presenting significant negative impacts on the shellfish mariculture industry. Under standard light microscopy, it is visually indistinguishable from other small algae in field samples due to its extremely small size. In this study, quantitative polymerase chain reaction（q PCR） based on 18 S r DNA sequences was developed and used to detect and enumerate A. anophagefferens. A linear regression（R2 = 0.91） was generated based on cycle thresholds value（Ct） versus known concentrations of A. anophagefferens. Twenty-two field samples collected in coastal waters of Qinhuangdao were subjected to DNA extraction and then analyzed using q PCR. Results showed that A. anophagefferens had a wide distribution in coastal waters along Qinhuangdao. Elevated A. anophagefferens abundance, category 3 brown tide blooms（〉200 000 cells/m L） occurred at Dongshan Beach and Tiger-stone Beach in August in 2013. In shellfish mariculture areas along coastal waters of Qinhuangdao, 4 stations had category 3 blooms, and 6 stations had category 2 blooms（35 000–200 000 cells/m L） in August and all stations had category 1 blooms（〉0 to ≤35 000 cells/m L） in October. Quantitative PCR allows for detection of A. anophagefferens cells at low levels in filed samples, which is essential to effective management and prediction of brown tide blooms.展开更多
This study presents uniaxial and triaxial compression tests on large-scale cemented rockfill(CRF)core samples from a Canadian hard-rock mine.Stress–strain curves indicate heterogeneity in strength and deformation pro...This study presents uniaxial and triaxial compression tests on large-scale cemented rockfill(CRF)core samples from a Canadian hard-rock mine.Stress–strain curves indicate heterogeneity in strength and deformation properties at various depths.Segregation causes uneven cement and aggregate distribution,affecting uniaxial compressive strength,which decreases with proximity to the discharge point.Findings confirm CRF column strength variability,aiding stability assessment and optimization.展开更多
文摘Based on the experience of soil sampling in Yuanzegou small watershed,several matters needing attention in soil field sampling are summarized.This paper focuses on the layout of sampling points,soil sample collection,soil sample preparation and matters needing attention about potential factors in soil field sampling,with a view to providing reference for undergraduates,master students or non-subject experimenters who are about to carry out experiments in this discipline.
文摘In the process of in-depth development of water resources management in our country, the national government departments continuously and gradually improve the requirements for on-site water monitoring technology and industry quality standards. Only by reducing the monitoring errors that may occur in on-site water sampling monitoring, can the quality accuracy of hydrological analysis monitoring results be better and effectively improved. This paper briefly describes and analyzes several risk factors affecting the on-site water quality sampling management of industrial water and drinking wastewater, and puts forward corresponding risk control measures to promote the continuous improvement of service quality of on-site water quality sampling management of industrial water and drinking wastewater.
文摘Erratum to 19(5):760-781 Frontiers ofStructural and Civil Engineering 2025,https://doi.org/10.1007/s11709-025-1168-5 The article“Interpretable artificial intelligence approach for understanding shear strength in stabilized clay soils using real field soil samples”,written by Mohamed Noureddin,Aghyad Al Kabbani,Alejandra Lopez,and Leena Korkiala-Tanttu,was originally published electronically on the publisher's internet portal on May 30,2025 without open access due to an unfortunate oversight during the conversion process.
基金The National Natural Science Foundation of China under contract No.40906081the Public Science and Technology Research Funds Projects of Ocean under contract Nos 2011418021 and 201305030Integrated Environmental Governances and Restoration in Beidaihe Coast of Hebei Province
文摘Aureococcus anophagefferens, a small pelagophyte algae, has caused brown tide blooms in coastal waters of Qinhuangdao in recent years, presenting significant negative impacts on the shellfish mariculture industry. Under standard light microscopy, it is visually indistinguishable from other small algae in field samples due to its extremely small size. In this study, quantitative polymerase chain reaction（q PCR） based on 18 S r DNA sequences was developed and used to detect and enumerate A. anophagefferens. A linear regression（R2 = 0.91） was generated based on cycle thresholds value（Ct） versus known concentrations of A. anophagefferens. Twenty-two field samples collected in coastal waters of Qinhuangdao were subjected to DNA extraction and then analyzed using q PCR. Results showed that A. anophagefferens had a wide distribution in coastal waters along Qinhuangdao. Elevated A. anophagefferens abundance, category 3 brown tide blooms（〉200 000 cells/m L） occurred at Dongshan Beach and Tiger-stone Beach in August in 2013. In shellfish mariculture areas along coastal waters of Qinhuangdao, 4 stations had category 3 blooms, and 6 stations had category 2 blooms（35 000–200 000 cells/m L） in August and all stations had category 1 blooms（〉0 to ≤35 000 cells/m L） in October. Quantitative PCR allows for detection of A. anophagefferens cells at low levels in filed samples, which is essential to effective management and prediction of brown tide blooms.
基金supported by the Natural Sciences and Engineering Research Council,Canada(Grant No.NSERC RGPIN-2019-04572).
文摘This study presents uniaxial and triaxial compression tests on large-scale cemented rockfill(CRF)core samples from a Canadian hard-rock mine.Stress–strain curves indicate heterogeneity in strength and deformation properties at various depths.Segregation causes uneven cement and aggregate distribution,affecting uniaxial compressive strength,which decreases with proximity to the discharge point.Findings confirm CRF column strength variability,aiding stability assessment and optimization.
