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Bioaccessibility and health risk assessment of hydrophobic organic pollutants in soils from four typical industrial contaminated sites in China

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Journal of Environmental Sciences 2025年第1期147卷 282-293页

作者： Shi-Ping Ou Xiao-Liang Liao Zi-Tao huang Yan-cong hu Zongwei Cai Zhi-Feng Chen Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong Kong 999077China

There have been reports of potential health risks for people from hydrophobic organic pollutants,such as polycyclic aromatic hydrocarbons(PAHs),polychlorinated hydrocarbons(PCHs),and organophosphate flame retardants(OPFRs).When a contaminated site is used for residential housing or public utility and recreation areas,the soil-bound organic pollutantsmight pose a threat to human *** this study,we investigated the contamination profiles and potential risks to human health of 15 PAHs,6 PCHs,and 12 OPFRs in soils from four contaminated sites in *** used an in vitro method to determine the oral bioaccessibility of soil *** PAHswere found at concentrations ranging from26.4 ng/g to 987 ng/***(0.27-14.3 ng/g)and OPFRs(6.30-310 ng/g)were detected,but at low levels compared to earlier *** levels of PAHs,PCHs,and OPFRs released from contaminated soils into simulated gastrointestinal fluids ranged from 1.74%to 91.0%,2.51%to 39.6%,and 1.37%to 96.9%,*** on both spiked and unspiked samples,we found that the oral bioaccessibility of pollutantswas correlated with their logKow andmolecularweight,and the total organic carbon content and pH of *** in 13 out of 38 contaminated soil samples posed potential high risks to *** considering oral bioaccessibility,nine soils still posed potential risks,while the risks in the remaining soils became *** contribution of this paper is that it corrects the health risk of soil-bound organic pollutants by detecting bioaccessibility in actual soils from different contaminated sites.

关键词： Contaminated soil Hydrophobic organic pollutant Polycyclic aromatic hydrocarbon Oral bioaccessibility Risk assessment

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Internal solitary waves in the Shenhu continental shelf slope break zone of the northern South China Sea generate benthic storms

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Science China Earth Sciences 2025年第3期68卷 928-942页

作者： Yonggang JIA Xuezhi FENG Chaoqi Zhu Linsen WANG Xiaolei LIU cong hu Hongwei WANG Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of China Laboratory for Marine Geology Qingdao Marine Science and Technology Center Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education Ocean University of China

Internal solitary waves can generate intense bottom currents and turbulent mixing over continental slopes, influencing the redistribution of sediments and pollutants, as well as driving changes in marine geomorphology and ecosystems. However,owing to the lack of detailed quantitative measurements of the bottom boundary layer, the mechanisms and impacts of internal solitary waves in resuspending and transporting seafloor sediments remain poorly understood. In this study, we present highresolution in situ observations of hydrodynamics in the upper layer(14–265 m) and the bottom boundary layer(<1 m) in the continental shelf slope break zone. Our results reveal that strongly nonlinear internal solitary waves, which occur at the peak of semidiurnal tidal currents, trigger benthic storms at the seafloor. Unlike previously proposed global instability mechanisms, the suspended sediment concentration caused by these strongly nonlinear internal solitary waves reaches 60 times higher than the background value and exhibits sudden, transient peaks. The bottom shear stress(τ) is an order of magnitude greater than that in laboratory measurements, and the observed fluctuating pressure is approximately 2.3 to 7 times greater than that in previous coastal observations. The sediments stirred by benthic storms are transported vertically to more than 100 m above the seabed,with lateral transport extending tens of kilometres beyond the study area. This process is driven by the dynamic mechanism of“strongly nonlinear internal solitary waves lifting sediments, weakly nonlinear internal solitary waves assisted by internal tides,and contour currents transporting sediments.” The suspended sediment flux induced by internal solitary waves in the South China Sea is on the same order of magnitude as that of global dust storm emissions, 21.9 times the volume of Asian dust storms entering the sea, and approximately 21 times the fluvial sediment flux entering the northern South China Sea. These find

关键词： Internal solitary waves Benthic storms Shear stress Suspended sediment flux Fluvial sediment flux

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基于图像定位的输电线长动态修正及综合行波测距方法

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电力系统保护与控制 2025年第2期53卷 125-135页

作者：李振兴刘凯胡聪皮志勇翁汉琍李振华新能源微电网湖北省协同创新中心(三峡大学) 湖北宜昌443002 三峡大学电气与新能源学院湖北宜昌443002 国网湖北省电力公司荆门供电公司湖北荆门448001

高压输电线路在不同负载下线长动态变化,进而影响基于固定线长的行波测距结果。考虑架空地线不受负荷影响,以地线为参考,应用图像识别定位技术标定地线、输电线相对坐标,并基于架空线路方程的理论推导实现输电线长动态修正。考虑输电杆... 详细信息

高压输电线路在不同负载下线长动态变化,进而影响基于固定线长的行波测距结果。考虑架空地线不受负荷影响,以地线为参考,应用图像识别定位技术标定地线、输电线相对坐标,并基于架空线路方程的理论推导实现输电线长动态修正。考虑输电杆塔等高、不等高场景,以悬链线方程为基础,转换应力/比载之比为单一变量,对应图像识别定位的地线-输电线高差H构建输电线长修正模型。进一步考虑视觉下的等间隔多点高差分布,应用曲线拟合技术,实现输电线长动态修正。最后将修正线长应用到单端和双端行波测距中,并提出基于最小误差的综合行波测距权重分配,仿真验证了所提线长修正效果及其测距精度。

关键词：输电线长修正行波测距地线-输电线高差图像识别曲线拟合

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Melt flow,solidification structures,and defects in 316 L steel strips produced by vertical centrifugal casting

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Advances in Manufacturing 2023年第4期11卷 636-646页

作者： Li-Bing Liu cong-hui hu Yun-hu Zhang Chang-Jiang Song Qi-Jie Zhai Center for Advanced Solidification Technology School of Materials Science and EngineeringShanghai UniversityShanghai200444People’s Republic of China

Vertical centrifugal casting can significantly enhance the filling capability of molten metals,enabling the production of complex thin-walled castings at near-rapid cooling *** this study,the melt flow,solidification structures,and defects in 316 L steel cast strips with a geometry of 80 mm×60 mm×2.5 mm produced by vertical centrifugal casting were numerically and experimentally analyzed under different rotation *** gradually increasing the rotation speed from 150 r/min to 900 r/min,the simulated results showed the shortest filling time and minimum porosity volume in the cast strip at a rotation speed of 600 r/*** a strong turbulent flow was generated by the rotation of the mold cavity during the filling process,experimental results showed that a“non-dendritic”structure was obtained in 316 L cast strip when centrifugal force was involved,whereas the typical dendritic structure was observed in the reference sample without *** areas of the cast strip exhibited one-dimensional cooling,but three-sided cooling appeared near the side of the cast ***,the pores and cracks in the 316 L strips were detected by computed tomography scanning and analyzed with the corresponding numerical *** indicated the existence of an optimal rotational speed for producing cast strips with minimal casting *** study provides a better understanding of the filling and solidification processes of strips produced by vertical centrifugal casting.

关键词： Vertical centrifugal casting Numerical simulation Melt flow Solidification behavior

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A Cation-Driven Approach toward Deep-Ultraviolet Nonlinear Optical Materials

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Research 2023年第3期2023卷 781-791页

作者： cong hu Meng Cheng Wenqi Jin Jian Han Zhihua Yang Shilie Pan Research Center for Crystal Materials CAS Key Laboratory of Functional Materials and Devices for Special EnvironmentsXinjiang Technical Institute of Physics&ChemistryCAS40–1 South Beijing RoadUrumqi 830011China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The design of new materials with special performances is still a great challenge,especially for the deep-ultraviolet nonlinear optical materials in which it is difficult to balance large bandgaps and strong second harmonic generation responses due to their inverse *** variation not only influences the whole structure frameworks but also directly participates in the formation of electronic structures,both of which could lead to the uncontrollability of the properties of the designed ***,a novel approach,aiming at purposeful and foreseeable material designs,is proposed to characterize the role of *** the verification of several series of borates,the influences of cation variation on property changes are explored ***,a feasible strategy of designing deep-ultraviolet nonlinear optical materials by substituting barium for lead has been concluded,which could obviously blue-shift the ultraviolet cutoff edge and maintain the relatively strong second harmonic generation response(more than 2 times of KH2PO4),achieving the property optimization,and especially works efficiently in *** property optimization design strategy and the cation characterization method are not only helpful in exploring nonlinear optical materials but also enlightening in material design and selection.

关键词： materials ultraviolet property

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插秧机自主驾驶控制系统设计与试验

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农机化研究 2025年第4期47卷 102-109页

作者：胡聪魏新华江苏大学农业工程学院江苏镇江212013 现代农业装备与技术教育部重点实验室江苏镇江212013

为了满足插秧机自动驾驶作业需求,提高插秧机路径跟踪精度与作业效果,设计了插秧机自主驾驶控制系统。以电控化改造的久富2ZG-6D(G6)型插秧机为研究平台,基于北斗/GNSS定位建立了插秧机路径跟踪模型,提出一种改进的变论域模糊PID控制算... 详细信息

为了满足插秧机自动驾驶作业需求,提高插秧机路径跟踪精度与作业效果,设计了插秧机自主驾驶控制系统。以电控化改造的久富2ZG-6D(G6)型插秧机为研究平台,基于北斗/GNSS定位建立了插秧机路径跟踪模型,提出一种改进的变论域模糊PID控制算法,并结合仿真和田间实车试验,对控制系统性能进行验证。仿真试验中,插秧机路径跟踪过程中横向偏差绝对值始终控制在0.03 m之内;田间试验时,插秧机按照规划的目标路径进行路径跟踪,横向偏差绝对值多控制在0.05 m之内,正、负横向偏差均值为0.031、0.034 m。试验结果表明:插秧机在作业行直线跟踪精度较高,设计的控制系统满足插秧作业需求。

关键词：插秧机自动驾驶路径跟踪

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Does the Belt and Road Initiative Increase the Carbon Emission Intensity of Paticipating Countries?

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China & World Economy 2021年第3期29卷 1-25页

作者： Yan Wu Chunlai Chen cong hu School of Economics Beijing Technology and Business UniversityChina Crawford School of Public Policy Australian National UniversityAustralia School of Economics and Resource Management Beijing Normal UniversityChina

The impact that the Belt and Road Initiative(BRI)has had on carbon emissions is a hotly debated *** a panel dataset of 178 countries from 2002 to 2017,and applying the quantile difference-in-difference method in different industries,this study finds that,first,the BRI overall tends to reduce the carbon emission intensity of BRI ***,the impact of BRI on reducing the carbon emission intensity is significant for BRI countries at higher(0.8 and 0.9)and lower(0.2 and 0.3)carbon emission intensity quantiles but it is insignificant for those at medium ***,the BRI has significant impacts on reducing carbon emission intensity in the energy-intensive industries,and this effect is the highest at the quantile level of 0.9 for all three industries considered here:transportation,electric and heating,and manufacturing and *** results indicate that establishing BRI cooperation with China will improve the environment and enhance the sustainable development ability of BRI countries.

关键词： Belt and Road Initiative carbon emission intensity difference-in-difFerence quantile regression

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Optimizing Optical Fiber Faults Detection:A Comparative Analysis of Advanced Machine Learning Approaches

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Computers, Materials & Continua 2024年第5期79卷 2697-2721页

作者： Kamlesh Kumar Soothar Yuanxiang Chen Arif hussain Magsi cong hu hussain Shah School of Electronics Engineering Beijing University of Posts and TelecommunicationsBeijing100876China State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an710071China State Key Laboratory ofNetworking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Efficient optical network management poses significant importance in backhaul and access network communicationfor preventing service disruptions and ensuring Quality of Service(QoS)*** emerging faultsin optical networks introduce challenges that can jeopardize the network with a variety of *** existingliterature witnessed various partial or inadequate *** the other hand,Machine Learning(ML)hasrevolutionized as a promising technique for fault detection and *** traditional fault managementsystems,this research has three-fold ***,this research leverages the ML and Deep Learning(DL)multi-classification system and evaluates their accuracy in detecting six distinct fault types,including fiber cut,fibereavesdropping,splicing,bad connector,bending,and PC ***,this paper assesses the classificationdelay of each classification ***,this work proposes a fiber optics fault prevention algorithm thatdetermines to mitigate the faults *** work utilized a publicly available fiber optics dataset namedOTDR_Data and applied different ML classifiers,such as Gaussian Naive Bayes(GNB),Logistic Regression(LR),Support Vector Machine(SVM),K-Nearest Neighbor(KNN),Random Forest(RF),and Decision Tree(DT).Moreover,Ensemble Learning(EL)techniques are applied to evaluate the accuracy of various *** addition,this work evaluated the performance of DL-based Convolutional Neural Network and Long-Short Term Memory(CNN-LSTM)hybrid *** findings reveal that the CNN-LSTM hybrid technique achieved the highestaccuracy of 99%with a delay of 360 *** the other hand,EL techniques improved the accuracy in detecting fiberoptic ***,this research comprehensively assesses accuracy and delay metrics for various classifiers andproposes the most efficient attack detection system in fiber optics.

关键词： Fiber optics fault detection multiclassification machine learning ensemble learning

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Surface magnetization of siderite mineral

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International Journal of Mining Science and Technology 2012年第6期22卷 816-821页

作者： Wu Xiqing Xu Pengyun Duan Yunfeng hu cong Li Guoping School of Minerals Processing and Bioengineering Central South University

Surface self-magnetization of siderite is achieved by generating ferromagnetic substance on the surface of siderite by adjusting slurry temperature,pH value,stirring rate and reaction *** addition of any iron-containing reagent is *** temperature of 60 ℃,NaOH concentration of 0.10 mol/L;stirring rate of 900 r/min and the reaction time of 10 min are the optimal *** results show that the siderite recovery in magnetic separation increased from 26.9% to 88.8% after surface *** kinetic equation is expressed as 1 [1(e0.269)]1/3 = *** energy for the magnetization reaction is 4.30 kJ/***,SEM and XPS were used to characterize the siderite,and results show that the saturated magnetization(rs) of siderite increased from 0.652 to 2.569Am2 /kg,the magnetic hysteresis was detected with a coercive force of 0.976 A/m after magnetization;Fe2P3/2 electron binding energy changed which reflects the valence alteration in iron on the surface and the formation of ferromagnetic Fe3O4.

关键词： Iron ores Magnetic separation Surface magnetization Air oxidation Fe3O4 chemical synthesis

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Phase modulation of bcc-structured Fe35Mn25Al15Cr10Ni15 high-entropy alloy by interstitial carbon

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Journal of Iron and Steel Research International 2018年第8期25卷 877-882页

作者： cong-hui hu Jian-lei Zhang Yun-hu Zhang Ke Han Chun-ming Li Chang-jiang Song Qi-jie Zhai State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering Shanghai University Shanghai 200444 China National High Magnetic Field Laboratory Florida State University Tallahassee FL 32310 USA

High-entropy alloys （HEAs） usually contain more than five alloying elements. The ductility of a body-centered cubic （bcc）- type HEA typically is lower than that of their face-centered cubic （fcc） counterpart. And low ductility restricts engineering applications of the bcc-structured HEAs. In engineering materials, improvement in ductility usually results in deduction of mechanical strength. A method to improve both mechanical strength and ductility in a bcc-structured HEA was proposed by adding interstitial carbon. Experimental results showed that replacement of 5 at.% Cr with 5 at.% C in a bcc-structured Fe35Mn25Al15Cr10Ni15 HEA resulted in an increase in fcc phase from 0.3 to 93.7 vol.%. Strength and ductility increased at the same time. The transition of bcc-structure to fcc-structure along with a remaining small amount of bcc phase improved mechanical properties. This work indicates that interstitial carbon can be employed to modulate the fraction of constituent phases in a bcc-structured HEA to enhance engineering mechanical properties.

关键词： High-entropy alloy Interstitial carbon Constituent phase Phase modulation Mechanical property

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