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Impact of inorganic and organic pollutants from a Belgian wastewater treatment plant on adjacent surface and groundwaters

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 75-90页

作者： Mingyue Luo Yiqi Su Delphine Jenny Vandeputte yuwei Jia Guanlei Li Willy Baeyens Marijke Huysmans Marc Elskens Yue Gao Analytical Environmental and Geo-Chemistry Department(AMGC)Vrije Universiteit Brussel(VUB)Pleinlaan 21050 BrusselsBelgium Hydrology and Hydraulic Engineering(HYDR) Vrije Universiteit Brussel(VUB)Pleinlaan 21050 BrusselsBelgium

Under the pressure of global droughts and water shortage,it is essential to evolve toward a sustainable and robust water *** possible avenue is the maximum reuse of treated wastewater,but the quality of which determines its ***,inorganic(Cd,Pb,Cr,Ni,Cu,and As)and organic(xenoestrogens and polycyclic aromatic contaminants,PACs)contaminants were monthly monitored in an effluent of the wastewater treatment plant(WWTP),the surrounding surface waters and the local groundwater in *** and particulate concentrations of inorganic contaminants in these water bodies were *** addition,Diffusive Gradients in Thin-films(DGT)was used in situ to obtain bioavailable metal *** the WWTP effluent and surface waters,only Ni exceeds the Annual Average-Environmental Quality Standard(AA-EQS),while in the groundwater,dissolved As was the predominant ***,in the surface and effluent waters the highest lability degrees were observed for Cd and *** concentrations of these metal species in the effluent water were lower than in the other water ***-organic pollutants,xenoestrogens and PACs were analyzed by dual Estrogen and Aryl hydrocarbon Receptor-Chemical Activated LUciferase gene eXpression(ER&AhR-CALUX)*** the annual averaged(AA)bioequivalent concentration of E2(0.18 ng/L)is below the AA-EQS standard(0.4 ng/L),and the bioequivalent concentration of benzo[a]pyrene never exceeded the maximum admissible concentration(MAC),the reclamation and reuse of treated wastewater for groundwater replenishment and agricultural irrigation should pose no environmental problems,at least in a short-term.

关键词： Metal contaminants DGT Labile metal fractions ERE/AhR-CALUX BEQ Xenoestrogens and polycyclic aromatic contaminants

Enhanced detection algorithm for apple bruises using structured light imaging

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ARTIFICIAL INTELLIGENCE IN AGRICULTURE 2024年第1期11卷 50-60页

作者： Zhu, Haojie Yang, Lingling Wang, Yu Wang, yuwei Hou, Wenhui Rao, Yuan Liu, Lu Anhui Agr Univ Coll Engn Hefei 230036 Peoples R China Anhui Agr Univ Key Lab Agr Sensors Minist Agr & Rural Affairs Hefei 230036 Peoples R China Chinese Acad Sci Hefei Inst Technol Innovat Engn Hefei 230094 Peoples R China

Bruising reduces the edibility and marketability of fresh apples, inevitably causing economic losses for the apple industry. However, bruises lack obvious visual symptoms, which makes it challenging to detect them using imaging techniques with uniform or diffuse illumination. This study employed the structured light imaging (SLI) technique to detect apple bruises. First, the grayscale reflection images were captured under phase-shifted sinusoidal illumination at three different wavelengths (600, 650, and 700 nm) and six different spatial frequencies (0.05, 0.10, 0.15, 0.20, 0.25, and 0.30 cycles mm-1). Next, the grayscale reflectance images were demodulated to produce direct component (DC) images representing uniform diffuse illumination and amplitude component (AC) images revealing bruises. Then, by quantifying the contrast between bruised regions and sound regions in all AC images, it was found that bruises exhibited the optimal contrast when subjected to sinusoidal illumination at a wavelength of 700 nm and a spatial frequency of 0.25 mm-1. In the AC image with optimal contrast, the developed h-domes segmentation algorithm to accurately segment the location and range of the bruised regions. Moreover, the algorithm successfully accomplished the task of segmenting central bruised regions while addressing the challenge of segmenting edge bruised regions complicated by vignetting. The average Intersection over Union (IoU) values for the three types of bruises were 0.9422, 0.9231, and 0.9183, respectively. This result demonstrated that the combination of SLI and the h-domes segmentation algorithm was a viable approach for the effective detection of fresh apple bruises. (c) 2023 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Apple bruises Bruise enhancement Image segmentation Structured illumination COMPUTER VISION DETECTION DEFECTS IMAGES SYSTEM DAMAGE

影像史学背景下教育电影的价值分析以及解读策略

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教育科学探索 2023年第2期41卷 88-96页

作者：贺雨薇华中师范大学教育学院湖北武汉430079

影像史学的兴起与发展为史学研究带来了研究视角和研究方法的创新。作为教育史研究发展的新动态,影像史学弥补了文字史料的不足,开阔了传统史学的研究视野,更加关注通过视觉传达历史信息的独特性,分析其所展示出的时代的精神气质。在教... 详细信息

影像史学的兴起与发展为史学研究带来了研究视角和研究方法的创新。作为教育史研究发展的新动态,影像史学弥补了文字史料的不足,开阔了传统史学的研究视野,更加关注通过视觉传达历史信息的独特性,分析其所展示出的时代的精神气质。在教育史研究中,教育电影的价值主要体现在:教育电影有助于丰富对教育价值观的理解,反思当下的教育困境,以及提供新视角,再现教育历史图景。研究者在对教育电影进行分析与研究时,应当进行符号解构,构建教育电影研究的释读框架;回归历史现场,结合教育电影产生的历史背景进行解读;保持批判性思维,围绕教育电影内容进行多方考证。

关键词：影像史学教育电影教育史研究

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儿童直立性高血压临床研究进展

中华实用儿科临床杂志 2016年第13期31卷 1037-1040页

作者：何昱苇金红芳北京大学第一医院儿科 100034

2012年儿童直立性高血压（OHT）的概念由我国学者率先提出并于2015年对其诊断标准进行了重新修订。临床上儿童OHT并不少见，以青春发育期儿童居多，多发生在突然体位变化或持久站立时，发病机制目前尚不清楚，以头晕、头痛、恶心、呕吐... 详细信息

2012年儿童直立性高血压（OHT）的概念由我国学者率先提出并于2015年对其诊断标准进行了重新修订。临床上儿童OHT并不少见，以青春发育期儿童居多，多发生在突然体位变化或持久站立时，发病机制目前尚不清楚，以头晕、头痛、恶心、呕吐为主要表现，严重者可出现晕厥。一般预后较好，但儿童期血压水平异常可能会延续至成年期，对儿童OHT的深入研究能够更好地预测成年期心脑血管疾病风险和评估靶器官损害。儿童OHT的治疗尚处于探索阶段，目前主张采取非药物治疗的方式，尚未见到药物治疗儿童OHT的相关报道。现就儿童OHT的诊断标准、流行病学特征、临床特征及治疗方面的进展进行综述，以期使临床医生对儿童OHT进行更深入的研究，提高儿童OHT的临床水平。

关键词：直立性高血压儿童临床表现诊断治疗

Light-Mediated Spatiotemporally Dynamic Assembly of DNA Nanostructures in Living Cells Regulates Autophagy

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CCS Chemistry 2024年第6期6卷 1557-1570页

作者： Rui Zhang Pin Hu yuwei Xu Ziqing Wang Dayong Yang Chi Yao Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering(MOE)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350 Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsCollege of Chemistry and MaterialsFudan UniversityShanghai 200438

The assembly of exogenous artificial architectures inside cells can regulate a series of biological events,which heavily relies on the development of spatiotemporally controlled molecular assembly *** herein report a designer deoxyribonucleic acid(DNA)nanostructure that enables light-mediated spatiotemporally dynamic assembly in living cells and consequently achieves efficient regulation of cell *** DNA nanostructure was constructed from i-motif moiety-containing branched DNA,photocleavable bond-containing linker,and tumor cell-targeting *** cellular uptake mediated by aptamers,under the spatiotemporal control of both UV light and late endosomal/lysosomal acidic environments,disassembly/reassembly of DNA nanostructure occurred via two rationally designed routes,generating microsized DNA *** a result,autophagy was significantly enhanced with the increase of DNA assembly *** enhanced autophagy showed an impact on related biological *** system is expected to be a powerful tool for the regulation of intracellular events and cellular behaviors.

关键词： DNA nanotechnology DNA hydrogel self-assembly autophagy i-motif

应变速率对Q460钢及其埋弧焊接头拉伸行为的影响

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机械工程材料 2023年第12期47卷 12-18页

作者：赵卓贺玉伟王磊刘杨东北大学材料科学与工程学院沈阳110819

利用埋弧焊技术对Q460钢进行焊接,研究了应变速率(0.001~100 s^(-1))对母材及焊接接头拉伸性能和断口形貌的影响。结果表明:焊接接头的室温准静态(应变速率为0.001 s^(-1))屈服强度、抗拉强度与母材均接近,但断后伸长率明显减小;随应变... 详细信息

利用埋弧焊技术对Q460钢进行焊接,研究了应变速率(0.001~100 s^(-1))对母材及焊接接头拉伸性能和断口形貌的影响。结果表明:焊接接头的室温准静态(应变速率为0.001 s^(-1))屈服强度、抗拉强度与母材均接近,但断后伸长率明显减小;随应变速率增大,母材屈服强度和抗拉强度的增大,对应变速率敏感;当应变速率在0.01~0.1 s^(-1)时,焊接接头的屈服强度和抗拉强度与准静态相当,当应变速率在1~100 s^(-1)时,强度明显提高,即强度对高应变速率敏感;母材、焊接接头的断后伸长率均先降低后增大,最小值分别出现在应变速率为0.01,0.1 s^(-1),焊接接头变化幅度很小;应变速率的增加使焊接接头拉伸断口中的韧窝先变小变浅随后变大变深,但未改变微观断裂机制,接头均为韧性断裂。

关键词：低合金高强度钢焊接接头拉伸强度应变速率

Ⅴ元素对铁镍基变形高温合金GH4061组织和性能的影响

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材料研究学报 2019年第6期33卷 419-426页

作者：黄烁贺玉伟胥国华段然王磊赵光普钢铁研究总院高温材料研究所北京100081 东北大学材料科学与工程学院沈阳110006

采用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和电化学萃取相分析等手段,研究了Ⅴ元素对GH4061合金晶粒度、碳化物和γ’/γ"强化相等影响,测试了不同Ⅴ含量试样的室温和750℃拉伸性能以及750℃/460 MPa持久性能,分析了Ⅴ元素对... 详细信息

采用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和电化学萃取相分析等手段,研究了Ⅴ元素对GH4061合金晶粒度、碳化物和γ’/γ"强化相等影响,测试了不同Ⅴ含量试样的室温和750℃拉伸性能以及750℃/460 MPa持久性能,分析了Ⅴ元素对合金显微组织和力学性能的影响。结果表明:GH4061合金中添加Ⅴ元素促进了MC型碳化物和γ’/γ"相析出,使晶粒尺寸小幅减小;Ⅴ元素通过增大γ基体的晶格常数,降低γ基体与γ’相的错配度,抑制了γ’/γ"相在750℃的快速粗化;Ⅴ元素添加对室温拉伸性能影响不大,但可显著提升750℃拉伸强度和持久寿命;当Ⅴ含量为0.4%(质量分数)时,GH4061合金具有最佳的750℃持久性能。

关键词：金属材料钒含量组织性能 GH4061合金变形高温合金

Exploring the Dual Subjectivity of Kindergarten's Self-made Play and Teaching Aids Activities from the Perspective of Children's Play Development in China

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教育技术与创新 2024年第1期6卷 1-9页

作者： yuwei Zhao College of Education Wenzhou UniversityChina

The joint development of teachers and young children is the basis for promoting the development of high-quality preschool education in the new era,and encouraging early childhood teachers to make playthings according to local conditions is both the fine tradition of China's early childhood education and the direct orientation of China's preschool education *** play and teaching aids are some of the methods often used in kindergartens,which skillfully combine young children's daily life objects with toys and early childhood teaching,not only enriching the collective activities of young children but also cultivating children's abilities in various *** homemade"play and teaching aids"for early childhood teachers and children have their special educational significance and value,therefore,this paper is based on the children and teachers double subject basis,discussing the homemade"play and teaching aids"for children and teachers of the double subject meanings,and puts forward the realization of the This paper discusses the double-subjective meaning of homemade teaching aids for children and teachers on the basis of the double-subjective foundation of children and teachers,and puts forward specific suggestions for realizing the double-subjectivity of kindergarten homemade teaching aids to enrich the theoretical value and practical significance of homemade teaching aids,to provide theoretical references and support for the relevant staff.

关键词： Self-made playthings Double subjectivity Kindergarten China

脉冲电流对GH4049合金静态再结晶行为的影响

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材料科学与工艺 2014年第5期22卷 1-5页

作者：高博王磊刘杨贺玉伟莫桐东北大学材料各向异性与织构教育部重点实验室沈阳110819

为解决高温合金的难变形问题,研究了高密度脉冲电流对GH4049合金静态再结晶行为的影响规律,分析了再结晶起始温度、再结晶激活能随脉冲电流频率变化的规律及机制,讨论了时效过程中粗化γ'相对合金再结晶行为的影响.研究表明:与常规温度... 详细信息

为解决高温合金的难变形问题,研究了高密度脉冲电流对GH4049合金静态再结晶行为的影响规律,分析了再结晶起始温度、再结晶激活能随脉冲电流频率变化的规律及机制,讨论了时效过程中粗化γ'相对合金再结晶行为的影响.研究表明:与常规温度场相比,脉冲电流作用下GH4049合金的静态再结晶起始温度明显降低,且降低幅度随脉冲电流频率、电流密度增加而增大;粗化的γ'相对合金的静态再结晶有促进作用,这对于解决难变形镍基高温合金热加工变形温度区间窄的问题具有积极意义.

关键词： GH4049合金脉冲电流再结晶再结晶起始温度再结晶激活能 γ’相