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Water:The lifeblood of the Earth-human system revealed in elemental correlations

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中国科学:地球科学英文版 2023年第10期66卷 2386-2390页

作者： zimeng wang Yongsheng LIU Anhuai LU Yanxin wang Department of Environmental Science and Engineering Fudan UniversityShanghai200433China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China Beijing Key Laboratory of Mineral Environmental Function School of Earth and Space SciencesPeking UniversityBeijing100871China MOE Key Laboratory of Groundwater Quality and Health State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic PollutionSchool of Environmental StudiesChina University of GeosciencesWuhan430074China

1.Elements and human history The rich chemistry of Earth's elements played an inherent and multifaceted role in shaping the course of human history.Generally,the more inert an element is,the simpler it becomes to extr... 详细信息

关键词： Earth minerals simpler

Achieving High Strength-plasticity of Nanoscale Lamellar Grain Extracted from Gradient Lamellar Nickel

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 67-78页

作者： zimeng wang Yunfei Jia Yong Zhang Pei Tang Xiancheng Zhang Shantung Tu Key Laboratory of Pressure Systems and Safety Ministry of EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China

Traditional metallic materials usually face a dilemma between high strength and poor strain hardening capacity.However,heterogeneous structured metallic materials have been found to obviously overcome the trade-of.Herein,gradient lamellar structure was fabricated through ultrasound-aided deep rolling technique in pure Ni with high stacking fault energy after heat treatment.The gradient lamellar Ni was successively divided into the four regions.In-situ micropillar compression tests were conducted in diferent regions to reveal the corresponding microscopic mechanical properties.Microscopic characterization techniques were performed to explore underlying deformation mechanisms and the efects of microstructural parameters on deformation behaviors.This work demonstrates that the micropillar with near nanoscale lamellar thickness possesses excellent strength and plasticity.On one hand,the reason for high strength of near nanoscale micropillar is that the strength of micropillar increases with the decrease of lamellar thickness according to the Hall-Petch efect.On the other hand,numerous lamellar grain boundaries perpendicular to the loading direction is found to hinder the motion of slip bands,resulting in great strain hardening capacity in the near nanoscale lamellar micropillar.

关键词： Nanoscale lamellar structure Compression test Slip Dislocation

Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post in situ mining: a column study and numerical simulation analysis

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环境科学与工程前沿(英文) 2023年第8期17卷 137-151页

作者： Gaosheng Xi Xiaojiang Gao Ming Zhou Xiangmei Zhai Ming Chen Xingxiang wang Xiaoying Yang Zezhen Pan zimeng wang Department of Environmental Science and Engineering Fudan UniversityShanghai 200438China School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China CAS Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Shanghai 202151China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200001China

Ion-absorbed rare earth mines,leached in situ,retain a large amount of ammonium nitrogen(NH4–N)that continuously releases into the surrounding environments.However,quantitative descriptions and predictions of the transport of NH4–N across mining area with hill slopes are not fully established.Here,laboratory column experiments were designed with an inclined slope(a sand box)to examine the spatial temporal transport of NH4–N in soils collected from the ionic rare earth elements(REE)mining area.An HYDRUS-2D model simulation of the experimental data over time showed that soils had a strong adsorption capacity toward NH4–N.Chemical non-equilibrium model(CNEM)could well simulate the transport of NH4–N through the soil-packed columns.The simulation of the transport-adsorption processes at three flow rates of leaching agents revealed that low flow rate enabled a longer residence time and an increased NH4-N adsorption,but reduced the extraction efficiency for REE.During the subsequent rainwater washing process,the presence of slope resulted in the leaching of NH4–N on the surface of the slope,while the leaching of NH4–N deep inside the column was inhibited.Furthermore,the high-intensity rainfall significantly increased the leaching,highlighting the importance of considering the impact of extreme weather conditions during the leaching process.Overall,our study advances the understanding of the transport of NH4–N in mining area with hills,the impact of flow rates of leaching agents and precipitation intensities,and presents as a feasible modeling method to evaluate the environmental risks of NH4–N pollution during and post REE in situ mining activities.

关键词： Ion-absorbed rare earth Ammonium nitrogen transport HYDRUS-2D Numerical simulation

Oligomers from the Synthetic Polymers:Another Potential Iceberg of New Pollutants

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Environment & Health 2023年第4期1卷 228-235页

作者： Changzhi Shi Mengjing wang zimeng wang Guangbo Qu Wei Jiang Xiangcheng Pan Mingliang Fang Department of Environmental Science and Engineering Fudan UniversityShanghai 200433China School of Energy and Environment and State Key Laboratory of Marine Pollution City University of Hong KongHong Kong 999077China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China Institute of Eco-Chongming Shanghai 202162China

Pollution generated by synthetic polymers,particularly plastics,has become a significant global environmental problem.However,when compared to polymer-derived products like microplastics,oligomers have not received the attention they deserve.Oligomers are by-products of polymer production and intermediates of degradation.Despite the industrial advancements leading to an exponential increase in the production of new polymers,a majority of oligomers have remained inadequately researched.While the exposure and toxic effects of polylactic acid oligomers have been documented,the structures and fundamental properties of oligomers derived from most polymers are still poorly understood.This knowledge gap presents challenges in establishing effective analytical methods.Considering the potential of oligomers to act as new pollutants,it is imperative to investigate their environmental behavior,as well as their absorption,distribution,metabolism,excretion,and toxicity(ADMET)properties.This perspective highlights the research gap concerning oligomers.

关键词： oligomers polymers microplastic new pollutants ADMET

Enrichment and transfer of polycyclic aromatic hydrocarbons (PAHs) through dust aerosol generation from soil to the air

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Frontiers of Environmental Science & Engineering 2023年第1期17卷 111-120页

作者： Qianqian Gao Xiaojing Zhu Qihuang wang Kaili Zhou Xiaohui Lu zimeng wang Xiaofei wang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Polycyclic aromatic hydrocarbons(PAHs)are major organic pollutants in soil.It is known that they are released to the atmosphere by wind via dust aerosol generation.However,it remains unclear how these pollutants are transferred through the air/soil interface.In this study,dust aerosols were generated in the laboratory using soils(sandy loam and loam)with various physicochemical properties.The PAH concentrations of these soils and their generated dust aerosol were measured,showing that the enrichment factors(EFs)of PAHs were affected by soil texture,PAH contamination level,molecular weight of PAH species and aerosol sizes.The PAHs with higher EFs(6.24–123.35 in dust PM_(2.5);7.02–47.65 in dust PM_(10))usually had high molecular weights with more than four aromatic rings.In addition,the positive correlation between EFs of PAHs and the total OCaerosol content of dust aerosol in different particle sizes was also statistically significant(r=0.440,P<0.05).This work provides insights into the relationship between atmospheric PAHs and the contaminated soils and the transfer process of PAHs through the soil-air interface.

关键词： Dust aerosols Enrichment factors(EFs) Polycyclic aromatic hydrocarbons(PAHs)

REGγ drives Lgr5^(+) stem cells to potentiate radiation induced intestinal regeneration

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Science China(Life Sciences) 2022年第8期65卷 1608-1623页

作者： Xiangzhan Zhu Minglei Yang Zaijun Lin Solomon Kibreab Mael Ya Li Lili Zhang Yaqi Kong Yaodong Zhang Yuping Ren Jianhui Li zimeng wang Ying Zhang Bo yang Tingmei Huang Fangxia Guan Zhenlong Li Robb E Moses Lei Li Bing wang Xiaotao Li Bianhong Zhang Changning Maternity and Infant Health Hospital East China Normal UniversityShanghai 20051China Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical SciencesSchool of Life SciencesEast China Normal UniversityShanghai 200241China Department of Orthopedic Oncology Changzheng Hospitalthe Second Military Medical UniversityShanghai 200003China Department of Spinal Surgery Shidong HospitalYangpu DistrictShidong Hospital Affiliated to University of Shanghai for Science and TechnologyShanghai 200438China Henan Key Laboratory for Helicobacter pylori&Microbiota and GI cancer Marshall Medical Research CenterThe Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Department of Neonatology Children’s Hospital Affiliated to Zhengzhou UniversityZhengzhou 450018China Department of Pathology Xuchang Central Hospital Affiliated to Henan University of Science and TechnologyXuchang 461000China School of Life Sciences Zhengzhou UniversityZhengzhou 450001China Department of Hematology&Hematopoietic Cell Transplantation City of Hope National Medical CenterLos Angeles CA 91010USA Department of Molecular and Cellular Biology Baylor College of MedicineHouston TX 77030USA Department of Oncological Surgery Minhang BranchShanghai Cancer CenterFudan UniversityShanghai 200240China

Leucine-rich repeat containing G protein-coupled receptor 5(Lgr5), a marker of intestinal stem cells(ISCs), is considered to play key roles in tissue homoeostasis and regeneration after acute radiation injury. However, the activation of Lgr5 by integrated signaling pathways upon radiation remains poorly understood. Here, we show that irradiation of mice with whole-body depletion or conditional ablation of REGγ in Lgr5^(+) stem cell impairs proliferation of intestinal crypts, delaying regeneration of intestine epithelial cells. Mechanistically, REGγ enhances transcriptional activation of Lgr5 via the potentiation of both Wnt and Hippo signal pathways. TEAD4 alone or cooperates with TCF4, a transcription factor mediating Wnt signaling, to enhance the expression of Lgr5. Silencing TEAD4 drastically attenuated β-catenin/TCF4 dependent expression of Lgr5. Together, our study reveals how REGγ controls Lgr5 expression and expansion of Lgr5+stem cells in the regeneration of intestinal epithelial cells.Thus, REGγ proteasome appears to be a potential therapeutic target for radiation-induced gastrointestinal disorders.

关键词： REGγ intestinal stem cell Lgr5 Wnt YAP

An overview of bioelectrokinetic and bioelectrochemical remediation of petroleum-contaminated soils

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Environmental Science and Ecotechnology 2023年第4期16卷 117-134页

作者： Jun Lan Fang Wen Yongxiang Ren Guangli Liu Yi Jiang zimeng wang Xiuping Zhu Shaanxi Key Laboratory of Environmental Engineering School of Environmental and Municipal EngineeringXi'an University of Architecture and TechnologyXi'an710055China Xinjiang Academy of Environmental Protection Science Urumqi830011China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou510006China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina Department of Environmental Science and Engineering Fudan UniversityShanghai200433China

The global problem of petroleum contamination in soils seriously threatens environmental safety and human health.Current studies have successfully demonstrated the feasibility of bioelectrokinetic and bioelectrochemical remediation of petroleum-contaminated soils due to their easy implementation,environmental benignity,and enhanced removal efficiency compared to bioremediation.This paper reviewed recent progress and development associated with bioelectrokinetic and bioelectrochemical remediation of petroleum-contaminated soils.The working principles,removal efficiencies,affecting factors,and constraints of the two technologies were thoroughly summarized and discussed.The potentials,challenges,and future perspectives were also deliberated to shed light on how to overcome the barriers and realize widespread implementation on large scales of these two technologies.

关键词： Petroleum hydrocarbons and derivatives Soil contamination Bioelectrokinetic remediation Bioelectrochemical remediation Microbial fuel cell

Automatic Sleep Staging Algorithm Based on Random Forest and Hidden Markov Model

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Computer Modeling in Engineering & Sciences 2020年第4期123卷 401-426页

作者： Junbiao Liu Duanpo Wu zimeng wang Xinyu Jin Fang Dong Lurong Jiang Chenyi Cai College of Information Science&Electronic Engineering Zhejiang UniversityHangzhouChina School of Communication Engineering Hangzhou Dianzi UniversityHangzhouChina Zhejiang Provincial Key Laboratory of Information Processing Communication and NetworkingHangzhouChina College of Information and Electric Engineering Zhejiang University City CollegeHangzhouChina School of Information Science and Technology Zhejiang Sci-Tech UniversityHangzhouChina Hangzhou Neuro Science and Technology Co. Ltd.HangzhouChina

In the field of medical informatics,sleep staging is a challenging and timeconsuming task undertaken by sleep experts.According to the new standard of the American Academy of Sleep Medicine(AASM),the stages of sleep are divided into wakefulness(W),rapid eye movement(REM)and non-rapid eye movement(NREM)which includes three sleep stages(N1,N2 and N3)that describe the depth of sleep.This study aims to establish an automatic sleep staging algorithm based on the improved weighted random forest(WRF)and Hidden Markov Model(HMM)using only the features extracted from double-channel EEG signals.The WRF classification model focuses on reducing the bias of the imbalance data,while the HMM model focuses on improving the detection rate of sleep staging through the relationship between adjacent sleep stages.In particular,the improved weighted RF classification model can increase the recognition rate of the N1 stage.In addition,the method of removing features with low variance is used to select meaningful and contributing feature parameters for model training.This is an innovative content of this paper.The sleep EEG data are first segmented into 30 s epochs,and the feature parameters of the epoch data are extracted from the double-channel by applying continuous wavelet packet transform(WPT).Each epoch is then segmented into 29 subepochs of 2 s long with 1 s overlap,and the frequency domain features and statistical features of each subepoch are extracted.The performance of the proposed method is tested by evaluating the accuracy(AC),Kappa coefficient,Recall(R),Precision(P)and F1-score(F1).In the Sleep-EDF database,the overall AC and Kappa coefficient obtained by WRF are 93.20%and 0.890,respectively using the subject-non-independent test.In the 10 sc*and 10 st*Sleep-EDF Expanded database,the overall AC and Kappa coefficient obtained by proposed method are 91.97%and 0.874,respectively using the subject-independent test.The best AC and Kappa coefficient of single subject can reach 96.3%and 0.912,respectively.Experimental results sho

关键词： Sleep staging wavelet packet transform random forest HMM

面向无人机海上侦察任务的自适应粒度分解策略研究

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火力与指挥控制 2024年第1期49卷 131-138页

作者：陈行军王梓蒙王义涛聂俊峰海军大连舰艇学院作战软件与仿真研究所辽宁大连116018 海军大连舰艇学院研究生队辽宁大连116018

无人机海上侦察作战任务自动规划的前提是任务分解,分解策略的通用性和分解粒度的合理性直接影响任务规划的速度和实际效果。对无人机海上侦察任务具有随机性强、复杂度高、动态性明显等特点,提出了一种基于军事领域知识库的无人机海上... 详细信息

无人机海上侦察作战任务自动规划的前提是任务分解,分解策略的通用性和分解粒度的合理性直接影响任务规划的速度和实际效果。对无人机海上侦察任务具有随机性强、复杂度高、动态性明显等特点,提出了一种基于军事领域知识库的无人机海上侦察任务自适应粒度分解策略,构建了无人机海上侦察领域知识图谱和自适应粒度任务分解模型,并以海上编队护航背景下的无人机侦察任务为例,实施了任务分解策略验证,结果表明分解策略较传统任务分解方法具有更佳的稳定性和适应性。

关键词：海上作战无人机侦察任务分解知识图谱自适应粒度