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Engineering practice of mechanical soil aeration for the remediation of volatile organic compound-contaminated sites in China： Advantages and challenges

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Frontiers of Environmental Science & Engineering 2016年第6期10卷 17-27页

作者： Yan Ma Xiaoming Du Yi Shi Deyi Hou Binbin Dong Zhu Xu Huiying Li yunfeng xie Jidun Fang Zheng Li Yunzhe Cao Qingbao Gu Fasheng Li School of Chemical and Environmental Engineering China University of Mining & Technology Beijing 100083 China Department of Soil Pollution Control State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China School of Environment Tsinghua University Beijing 100084 China Beijing Key Laboratory for Risk Modeling and Remediation of Contaminated Sites Beijing Municipal Research Institute of Environmental Protection Beijing 100037 China Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta Binzhou University Binzhou 256600 China

In recent years, many industrial enterprises located in the urban centers of China have been relocated owing to the rapid increase in urban development. At the sites abandoned by these enterprises, volatile organic compounds have frequently been detected, sometimes at high concentrations, particularly at sites abandoned by chemical manufacturing enterprises. With the redevelopment of sites and changes in land-use tvpe associated with these sites, substantial amounts of contaminated soils now require remediation. ＂Since China is a developing country, soil remediation warrants the usage of techniques that are suitable for addressing the unique challenges faced in this country. Land shortage is a common problem in China; the large numbers of contaminated sites, tight development schedules, and limited financial resources necessitate the development of .cost-effective methods for land reclamation.Mechanical soil aeration is a simple, effective, and low-cost soil remediation tectm^que mat is particularly suitable for the remediation of large volatile organic compound-contaminated sites. Its effectiveness has been confirmed by conducting laboratory studies, pilot tests, and full-scale projects.This study reviews current engineei-ing practice and developmental trends of mechanical soil aeration and analyzes the advantages and disadvantages of this technology for application in China as an emerging soil remediation market. The findings of this study might aid technology development in China, as well as assist other developing countries in the assessment and implementation of costeffective hazardous waste site soil remediation programs.

关键词： Soil contamination Volatile organic compound Mechanical soil aeration Engineering practice China

TAD-Net:An approach for real-time action detection based on temporal convolution network and graph convolution network in digital twin shop-floor[version 1;peer review:2 approved]

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Digital Twin 2021年第1期1卷 39-56页

作者： Qing Hong Yifeng Sun Tingyu Liu Liang Fu yunfeng xie School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China China Electronics Technology Group 28th Research Institute Nanjing210007China School of Mechanical Engineering Southeast UniversityNanjing210096China

Background:Intelligent monitoring of human action in production is an important step to help standardize production processes and construct a digital twin shop-floor rapidly.Human action has a significant impact on the production safety and efficiency of a shop-floor,however,because of the high individual initiative of humans,it is difficult to realize real-time action detection in a digital twin shop-floor.Methods:We proposed a real-time detection approach for shop-floor production action.This approach used the sequence data of continuous human skeleton joints sequences as the input.We then reconstructed the Joint Classification-Regression Recurrent Neural Networks(JCR-RNN)based on Temporal Convolution Network(TCN)and Graph Convolution Network(GCN).We called this approach the Temporal Action Detection Net(TAD-Net),which realized real-time shop-floor production action detection.Results:The results of the verification experiment showed that our approach has achieved a high temporal positioning score,recognition speed,and accuracy when applied to the existing Online Action Detection(OAD)dataset and the Nanjing University of Science and Technology 3 Dimensions(NJUST3D)dataset.TAD-Net can meet the actual needs of the digital twin shop-floor.Conclusions:Our method has higher recognition accuracy,temporal positioning accuracy,and faster running speed than other mainstream network models,it can better meet actual application requirements,and has important research value and practical significance for standardizing shop-floor production processes,reducing production security risks,and contributing to the understanding of real-time production action.

关键词： Digital twin shop-floor Production action Real-time action detection TAD-Net TCN GCN

颅内动脉瘤患者介入栓塞术后心理痛苦状况及影响因素

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河南医学研究 2024年第8期33卷 1458-1462页

作者：王楠马惠贤谢云峰徐晓玉平顶山市第一人民医院介入科河南平顶山467000

目的调查颅内动脉瘤患者经介入栓塞术治疗后心理痛苦状况,同时分析其影响因素,以期为临床缓解患者心理痛苦提供理论依据。方法选取2021年1月至2022年1月70例采用介入栓塞术治疗的颅内动脉瘤患者作为研究对象。术后6个月时使用心理痛苦... 详细信息

目的调查颅内动脉瘤患者经介入栓塞术治疗后心理痛苦状况,同时分析其影响因素,以期为临床缓解患者心理痛苦提供理论依据。方法选取2021年1月至2022年1月70例采用介入栓塞术治疗的颅内动脉瘤患者作为研究对象。术后6个月时使用心理痛苦温度计问卷评估患者的心理痛苦状况,依据评分结果分为心理痛苦组与无痛苦组;同时使用症状体验量表、社会支持评定量表、康复复原力调查表评估患者的症状负担、社会支持以及康复复原力水平,比较两组患者的临床资料;采用多因素logistic回归性分析检验影响颅内动脉瘤患者介入栓塞术后心理痛苦状况的相关因素。结果70例颅内动脉瘤患者有40例患者存在心理痛苦,占比为57.14%(40/70)。两组患者在性别、症状负担水平、社会支持水平、康复复原力水平方面比较,差异有统计学意义(P<0.05)。经多因素logistic回归性分析检验显示性别、症状负担水平、社会支持水平、低等支持、康复复原力水平是影响患者术后心理痛苦状况的影响因素(P<0.05)。结论颅内动脉瘤患者介入栓塞术后普遍存在心理痛苦,且其受性别、症状负担、社会支持以及康复复原力水平的影响。

关键词：颅内动脉瘤介入栓塞术心理痛苦

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Improving antioxidant activities of water-soluble lignin-carbohydrate complex isolated from wheat stalk through prolonging ball-milling pretreatment and homogeneous extraction

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Journal of Bioresources and Bioproducts 2024年第1期9卷 113-125页

作者： Di xie Zhulan Liu yunfeng Cao Sheng-I Yang Chen Su Mi Li Jiangsu Co-innovation Center for Efficient Processing and Utilization of Forest Products Nanjing Forestry UniversityNanjing 210037China International Innovation Center for Forest Chemicals and Materials Nanjing Forestry UniversityNanjing 210037China Center for Renewable Carbon School of Natural ResourcesUniversity of TennesseeKnoxvilleTN 37996USA Shandong Huatai Paper Co. Ltd.Dongying 257000China School of Natural Resources University of TennesseeKnoxvilleTN 37996USA Key Lab of Biomass Energy and Material Institute of Chemical Industry of Forest ProductsChinese Academy of ForestryJiangsu ProvinceNanjing 210042China

Water-soluble lignin-carbohydrate complex(LCC)rich in polysaccharides exhibits benign in vitro antioxidant activities and distinguishes high biocompatibility from lignin-rich LCC and lignin.However,the antioxidant activity of water-soluble LCCs remains to be improved and its structure-antioxidant relationship is still uncertain.Herein,structurally diversified water-soluble LCCs were isolated under different ball-milling pretreatment durations(4,6,8 h),extraction pathways(ho-mogeneous and heterogeneous),and isolation routines(water extracts and residues after water extraction).Their structures were characterized by wet chemistry,chromatography and spec-troscopies.Antioxidant activities were evaluated by ferric reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl radicals scavenging rate(RDPPH).Results show that altering ball-milling duration and isolation procedures cause varied structures and antioxidant activities of the water-soluble LCCs.Specifically,prolonging ball-milling duration to 8 hours and homogeneous extrac-tion can enhance their antioxidant activity through releasing more phenolic structures and pro-moting the extraction of high-molecular-weight LCCs via reducing mass-transfer resistance,re-spectively.As a result,the RDPPH of water-soluble LCCs reaches up to 97.35%,which is associated with the arabinan content with statistical significance(P<0.05).This study provides new insights into the structure-antioxidation relationship of herbaceous LCC as potential antioxidants.

关键词： LCC Homogeneous extraction Ball-milling Structure-antioxidation relationship Wheat straw

区域场地土壤跨介质污染物多源清单:中国场地土壤污染防治的新策略

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Science Bulletin 2024年第5期69卷 566-569页

作者：李晔何天豪丁方方李小飞黄晔何尔凯蔡虹明史沛丽柳检李岩曲瑞娟郑旺谢云峰刘杏梅赵玲刘敏 Key Laboratory of Geographic Information Science(Ministry of Education) School of Geographic SciencesEast China Normal UniversityShanghai 200241China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Environmental Natural Resource Sciences Zhejiang UniversityHangzhou 310058China Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

China has experienced rapid economic development and industrialization during the past four decades,leading to widespread distribution of various types of industrial facilities[1].With the understanding of soil contamination induced by industrial sites and rapid urbanization,abandoned industrial sites are generally reclassified for urban land[2].The remained brownfield sites(the sites of abandoned,idle,or under used industrial and commercial facilities where expansion or redevelopment is hindered by environmental contamination)exhibit great health risks to the residents due to that pollutants were continuously discharged intothe surrounding environments[3].

关键词：土壤污染防治 environments facilities

Assessing the health risk of heavy metals in vegetables to the general population in Beijing,China

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Journal of Environmental Sciences 2009年第12期21卷 1702-1709页

作者： SONG Bo LEI Mei CHEN Tongbin ZHENG Yuanming xie yunfeng LI Xiaoyan GAO Ding Center for Environmental Remediation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of Chinese Academy of Sciences Beijing 100039 China

A systematic survey of As, Cd, Cr, Cu, Ni, Pb and Zn concentrations in vegetables from 416 samples （involving 100 varieties） in Beijing was carried out for assessing the potential health risk to local inhabitants. The results indicated that the metal concentrations in vegetables ranged from 〈 0.001 to 0.479 μg/g fresh weight （fw）（As）, 〈 0.001 to 0.101 μg/g fw （Cd）, 〈 0.001 to 1.04 μg/g fw （Cr）, 0.024 to 8.25μg/g fw （Cu）, 0.001 to 1.689 μg/g fw （Ni）, 〈 0.001 to 0.655 μg/g fw （Pb） and 0.01 to 25.6 μg/g fw （Zn）, with average concentrations of 0.013, 0.010, 0.023, 0.51, 0.053, 0.046 and 2.55 μg/g fw, respectively. The results showed that the concentrations of As, Cr, Cu, Cd, Pb and Ni in vegetables from open-fields were all significantly higher than those grown in greenhouses. In addition, in local-produced vegetables, all HMs except Zn were significantly higher than those in provincial vegetables. The estimated daily intake （EDI） of As, Cd, Cr, Cu, Ni, Pb and Zn from vegetables was 0.080, 0.062, 0.142, 3.14, 0.327, 0.283 and 15.7 μg/（kg body weight （bw）.d） for adults, respectively. Arsenic was the major risk contributor for inhabitants since the target hazard quotient based on the weighted average concentration （THQw） of arsenic amounted to 44.3% of the total THQ （TTHQ） value according to average vegetable consumption. The TTHQ was lower than 1 for all age groups, indicating that it was still safe for the general population of Beijing to consume vegetables.

关键词： heavy metals health risk estimated daily intake Beijing vegetable

Critical temperature of Bose-Einstein condensation for weakly interacting bose gas in a potential trap

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Science China(Physics,Mechanics & Astronomy) 2005年第5期48卷 521-528页

作者： YU Xuecai YE Yutang WU yunfeng xie Kang CHENG Lin College of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China College of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China College of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China College of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China College of Opto-Electronic Information University of Electronic Science and Technology of China Chengdu 610054 China

The critical temperature of Bose-Einstein condensation at minimum momentum state for weakly interacting Bose gases in a power-law potential and the deviation of the critical temperature from ideal bose gas are studied. The effect of interaction on the critical temperature is ascribed to the ratiao α/λc, where α is the scattering length for s wave and λc is de Broglie wavelength at critical temperature. As α/λc<<1/(2π )2, the interaction is negligible. The presented deviation of the critical temperature for three dimensional harmonic potential is well in agreement with recent measurement of critical temperature for 87Rb bose gas trapped in a harmonic well.

关键词： Bose-Einstein condensation, critical temperature, bose gas.

信用贷款的违约风险必然较高吗?--基于中小银行逐笔贷款数据的实证研究

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南方金融 2022年第3期 28-40页

作者：谢云峰彭振江谢港华中国人民银行南昌中心支行江西南昌330008 江西财经大学经济学院江西南昌330013

推动信用贷款投放、提升信用贷款比重是化解中小微企业融资难的重要举措,而了解并夯实信用贷款的风险缓释机制是其必要前提。本文基于某中部省份174家中小法人银行逐笔企业贷款数据,实证研究信用贷款的风险缓释机制特点及其对贷款违约... 详细信息

推动信用贷款投放、提升信用贷款比重是化解中小微企业融资难的重要举措,而了解并夯实信用贷款的风险缓释机制是其必要前提。本文基于某中部省份174家中小法人银行逐笔企业贷款数据,实证研究信用贷款的风险缓释机制特点及其对贷款违约风险的影响。结果表明:第一,与担保贷款相比,信用贷款降低了贷前潜在违约风险,但增加了贷后实际违约风险,说明当前中小银行控制信用贷款风险的措施主要集中在贷前阶段的企业审查,而对贷后阶段的道德风险防控不足。第二,与担保贷款相比,信用贷款虽然整体违约率较低,但一旦成为不良贷款,继续向下迁徙的可能性更高。第三,加强贷后管理、提高企业信息透明度以及完善社会信用环境,有助于降低信用贷款贷后违约风险。提升信用贷款比重、降低贷款违约风险,需要形成多方合力:商业银行应着力加强贷后风险管控,企业应主动提升信息透明度、减少信息不对称,政府部门应进一步完善社会信用环境、优化信用激励约束机制。

关键词：商业银行信用贷款违约风险风险缓释机制小微企业融资

基于磁性纳米材料修饰的离子液体萃取番茄中的过氧化氢酶

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中国食品学报 2022年第3期22卷 139-146页

作者：王涛翟晨栾鑫鑫王书雅谢云峰王亮新疆大学生命科学与技术学院乌鲁木齐830017 中粮营养健康研究院营养健康与食品安全北京市重点实验室北京102209 北京工业大学环境与生命学部北京100124

目的:基于一种新型离子液体1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体建立萃取分离番茄中过氧化氢酶的新方法。方法:考察1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体加入量、萃取时间、萃取温度等试验条件改变时提取酶活性的变化,... 详细信息

目的:基于一种新型离子液体1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体建立萃取分离番茄中过氧化氢酶的新方法。方法:考察1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体加入量、萃取时间、萃取温度等试验条件改变时提取酶活性的变化,通过响应面确定萃取的最理想试验条件:1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体最佳用量为176 mg,萃取温度35℃和萃取时间30 min。对比最佳试验萃取条件和传统萃取条件下番茄样品过氧化氢酶活性,结果:基于磁性纳米材料修饰的离子液体萃取的酶活性高,萃取时间缩短了10 min。结论:本试验为萃取高活性过氧化氢酶及其它蛋白酶类物质拓展了思路。

关键词： 1-羟乙基-3-甲基咪唑基Fe_(3)O_(4)纳米磁流体过氧化氢酶萃取酶活