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Clinical practice guideline for body composition assessment based on upper abdominal magnetic resonance images annotated using artificial intelligence

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Chinese Medical Journal 2022年第6期135卷 631-633页

作者： Han Lv Mengyi li Zhenchang Wang Dawei Yang Hui xu Juan li Yang liu Di Cao Yawen liu Xinru Wu He Jin Peng Zhang liqin Zhao Rixing Bai Yunlong Yue bin li Nengwei Zhang Mingzhu Zou Jinghai Song Weibin Yu Pin Zhang Weijun Tang Qiyuan Yao liheng liu Hui Yang Zhenghan Yang Zhongtao Zhang National Clinical Research Center for Digestive Diseases in Beijing Friendship Hospital,Capital Medical university Beijing Quality Control and Improvement Center of Medical Imaging National Health Commission Capacity Building and Continuing Education Center,Chinese College of Metabolic and Bariatric Surgeons Beijing Quality Control and Improvement Center of Metabolic and Bariatric Surgery Department of Radiology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of General Surgery Beijing Friendship HospitalCapital Medical University&National Clinical Research Center for Digestive DiseasesBeijing 100050China school of Biological science and Medical {2. Beihang UniversityBeijing 100191China Department of Radiology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of General Surgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of MR Beijing Shijitan HospitalCapital Medical University/Peking UniversityNinth Clinical Medical CollegeBeijing 100038China Department of General Surgery Beijing Shijitan HospitalCapital Medical University/Peking UniversityNinth Clinical Medical CollegeBeijing 100038China Department of Radiology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of General Surgery Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Radiology Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China Department of Bariatric and Metabolic Surgery Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China Department of Radiology Huashan HospitalFudan UniversityShanghai 200040China Center for Obesity and Metabolic Surgery Huashan HospitalFudan UniversityShanghai 200040China Department of Radiology Zhongshan HospitalFudan UniversityShanghai 200032China Department of Radiology The Second Affiliated Hospital of Shandong First Medical UniversityTai'anShandong 271000China 不详

Introduction Upper abdominal magnetic resonance(MR)imaging is appropriate for body composition analysis.111 Especially for individuals with obesity,it is of great value to quantify the hepatic proton density fat fraction(PDFF)and the amount of abdominal adipose tissue during clinical evaluation and for research on obesity-related *** results may be used to determine the optimal choice of surgical procedure and evaluate treatment *** artificial intelligence(Al)algorithms and systems have been developed for the automated measurement of body *** basis of Al development and application is to have uniform standards for clinical data acquisition and *** uneven quality ofMR images is one ofthe major obstacles to Al system development and analytical results.A standardized process of MR scanning and clinical data management is urgently needed.

关键词： abdominal obesity artificial

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CACA guidelines for holistic integrative management of rectal cancer

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Holistic Integrative Oncology 2023年第1期2卷 1-31页

作者： Committee of Colorectal Cancer Society Chinese Anti-Cancer Association Guiyu Wang Daiming Fan Jin Gu Kefeng Ding xuedong Fang lin Shen Zhongfa xu Jianmin xu Jianchun Cai lianming Cai Sanjun Cai Gong Chen Jiansi Chen Longwei Cheng Yong Cheng Pan Chi {2.{2. Cui Guanghai Dai Chuangang Fu Yanhong Gu Guodong He Junhong Hu Jing Huang Rui Huang Zhongcheng Huang Zheng Jiang Zhigang Jie Haixing Ju Hai li Jian li Jun li Ming li Yaoping li Yunfeng li Guole lin Haiying liu Ming liu Qian liu Zhizhong Pan Yifan Peng Niansong Qian Meng Qiu li Ren Yueming Sun Jianqiang Tang Qingchao Tang Yuan Tang Kaixiong Tao Min Tao Haijiang Wang Meng Wang Zejun Wang Zhengguang Wang Ziqiang Wang Ziwei Wang Shaozhong Wei Baocai Xing {2. Xiong Ye xu Su Yan {2. Yang Chunkang Yang Qinghua Yao Yingjiang Ye Ying Yuan Guozhi Zhang Haizeng Zhang Hongmei Zhang Zhen Zhang Yunshi Zhong Ji Zhu Yuan Zhu Yuping Zhu Shuangmei Zou Yuliuming Wang Jingfang Lv Enrui liu Ming Yang Qian Zhang Weiyuan Zhang lin Zhang Jun Luo Zhaoxu Zheng Zhixun Zhao Zheng liu Jinhua Tao Haiyang Huang Tianli Chen Xishan Wang 不详 Department of Colorectal Cancer Surgery The Second Affiliated Hospital of Harbin Medical UniversityHarbinChina State key Laboratory of Cancer Biology National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive DiseasesFourth Military Medical UniversityXi’anChina Department of Gastrointestinal SurgeryⅢ Peking University Cancer HospitalBeijingChina Department of Gastrointestinal Surgery Peking University Shougang HospitalBeijingChina Department of Colorectal Surgery and Oncology(Key Laboratory of Cancer Prevention and Intervention China National Ministry of EducationKey Laboratory of Molecular Biology in Medical SciencesZhejiang Provincial Clinical Research Center for CANCER)The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina Department of Gastrointestinal and Colorectal Surgery The China-Japan Union Hospital of Jilin University(The Third Hospital of Jilin University)ChangchunChina Department of Gastrointestinal Oncology Key laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing)Peking University Cancer Hospital&InstituteBeijingChina Gastrointestinal Department of The Third Affiliated Hospital of shandong First Medical {2. TaianShandongChina Department of Colorectal Surgery Zhongshan Hospital Fudan UniversityShanghaiChina Shanghai engineering Research Center of Colorectal Cancer Minimally Invasive Technology ShanghaiChina Zhongshan Hospital Xiamen university XiamenChina Department of Abdominal Oncology Surgery Ganzhou Cancer HospitalGanzhouJiangxiChina Fudan university Shanghai Cancer Center ShanghaiChina Department of colorectal surgery Sun Yat-sen University Cancer CenterGuangzhouChina Guangxi Medical university Cancer Hospital NanningChina Jilin Cancer Hospital ChangchunChina Department of Gastrointestinal Surgery the First Affiliated Hospital of Chongqing Medical UniversityChongqingChina Department of Colorectal Surgery Fujian Medical University Union HospitalFuzhou

Purpose Colorectal cancer is a common malignant tumor *** china,the ratio of rectal cancer to coloncancer in terms of incidence is close to 1:*** rectal cancer accounts for more than half of all cases of rectal *** recent years,the proportion of rectal cancer has trended downward,however the incidence of rectal cancer inyounger adults is *** CACA Guidelines for Holistic Integrative Management of Rectal Cancer were editedto help improve the diagnosis and comprehensive treatment in *** This guideline has been prepared by consensuses reached by the CACA Committee of Colorectal CancerSociety,based on a careful review of the latest evidence including china’s studies,and referred to domestic and internationalrelative guidelines,also considered china’s specific national conditions and clinical *** The CACA Guidelines for Holistic Integrative Management of Rectal Cancer include the epidemiology of rectalcancer,prevention and screening,diagnosis,treatment of nonmetastatic and metastatic rectal cancer,follow-up,and whole-course rehabilitation *** Committee of Colorectal Cancer Society,Chinese Anti-Cancer Association,standardizes the diagnosisand treatment of rectal cancer in china through the formulation of the CACA Guidelines.

关键词： Rectal cancer Guideline Screening Diagnosis Treatment Rehabilitation management Holistic integrative medicine

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约束对DNAN基熔铸炸药点火反应特性的影响

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火炸药学报 2023年第12期46卷 1086-1092页

作者：马腾董小丽杨年刘静平罗一民徐森刘大斌万敏南京理工大学化学与化工学院江苏南京210094 南京理工大学发射动力研究所江苏南京210094 国家民用爆破器材质量监督检测中心江苏南京210094 青岛海关技术中心山东青岛266599

为了探究约束对2.4-二硝基苯甲醚(DNAN)基熔铸炸药点火反应特性的影响,设计了不同壁厚条件下单端点火试验和相同壁厚的爆轰试验;基于爆炸相似理论,通过对比爆轰试验与点火试验产生的冲击波超压,估算了炸药在点火试验中产生的等效反应药... 详细信息

为了探究约束对2.4-二硝基苯甲醚(DNAN)基熔铸炸药点火反应特性的影响,设计了不同壁厚条件下单端点火试验和相同壁厚的爆轰试验;基于爆炸相似理论,通过对比爆轰试验与点火试验产生的冲击波超压,估算了炸药在点火试验中产生的等效反应药量。结果表明,DNAN基熔铸炸药在一般约束条件下(壁厚小于10mm),经黑火药引燃后仅发生燃烧反应;在强约束条件下(壁厚2.、30、40及50mm)反应更为剧烈,但未发生典型的燃烧转爆轰过程,反应烈度为爆燃或爆炸级。DNAN基熔铸炸药发生反应的等效反应药量随着管体壁厚增大,爆炸百分比从2..9%依次增加至34.8%、77.3%及78.7%。可知在一定范围内增强约束条件,炸药燃烧进程会随之加快,反应更为剧烈,但当约束条件足够强时,这种促进作用将不再明显。

关键词：爆炸力学熔铸炸药 2.4-二硝基苯甲醚 DNAN 点火反应约束条件等效反应药量

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根部成形及错边量对不等壁厚环焊接头局部应变集中行为的影响

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精密成形工程 2023年第6期15卷 136-145页

作者：贾海东马海龙余文昌孙培翔徐乐乐韩彬李立英李学达国家管网集团西部管道有限责任公司乌鲁木齐830000 中国石油大学(华东)材料科学与工程学院山东青岛266555

目的探究高钢级管道不等壁厚环焊接头的局部应变集中规律,揭示其局部开裂的根本原因。方法采用STT半自动根焊+自保护药芯焊丝半自动焊填充、盖面的方式焊接X80管道不等壁厚环,并利用DIC技术对3种不同错边量及根部成形的不等壁厚环焊接... 详细信息

目的探究高钢级管道不等壁厚环焊接头的局部应变集中规律,揭示其局部开裂的根本原因。方法采用STT半自动根焊+自保护药芯焊丝半自动焊填充、盖面的方式焊接X80管道不等壁厚环,并利用DIC技术对3种不同错边量及根部成形的不等壁厚环焊接头进行全壁厚拉伸,观察其在拉伸过程中的应变规律。结果不等壁厚环焊接头的应变集中主要发生在薄壁侧根部焊趾与厚壁侧盖面焊趾的连线区域,这是由于不等壁厚环焊接头受拉时会产生附加弯矩,该弯矩与薄壁侧根部焊趾及厚壁侧盖面焊趾处的应力集中相耦合使该区域发生应变集中。另外,错边量的存在会增大附加弯矩并使根部成形变差,因此错边量越大,应变集中区域面积越小、应变集中程度越高。定量分析结果表明,当薄壁侧管体远端应变达到0.5%时,3类成形接头根部最大应变分别为0.83%、9.60%、11.88%,盖面处最大应变分别为1.00%、7.10%、10.60%。结论大的错边量或差的根部成形会使不等壁厚环焊接头局部出现严重的应变集中,若与焊接缺陷相耦合可能会导致接头局部损伤,为裂纹的萌生与扩展提供条件。因此,在焊接过程中应增加接头的组对精度、减小错边量。

关键词：环焊接头不等壁厚应变集中错边量根部成形 DIC技术

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木质纤维素的功能化应用

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齐鲁工业大学学报 2020年第3期34卷 36-41页

作者：蔡梦洁马丽李绪旺李妍王斌收董翠华齐鲁工业大学(山东省科学院)轻工科学与工程学院济南250353

木质纤维素是地球上最丰富的,可持续的,生物可降解,生物相容性和易于化学改性的生物质资源。随着现代物理和化学技术的进步,木质纤维素及其衍生物广泛应用于食品添加剂、药物的缓控释放、新型复合材料以及生物医药等领域。在新型智能制... 详细信息

木质纤维素是地球上最丰富的,可持续的,生物可降解,生物相容性和易于化学改性的生物质资源。随着现代物理和化学技术的进步,木质纤维素及其衍生物广泛应用于食品添加剂、药物的缓控释放、新型复合材料以及生物医药等领域。在新型智能制造领域,由木制纤维素制备出的高性能、多功能纤维、新型多功能薄膜以及纤维素凝胶产品已广泛应用于各种新技术领域,如电子、生物医学设备和能源。本文重点介绍从一维到三维的纤维素基复合功能性材料的制备及应用。

关键词：木质纤维素纤维薄膜复合功能材料

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Feasibility and physics potential of detecting ^(8)B solar neutrinos at JUNO

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Chinese Physics C 2021年第2期45卷 93-110页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Sebastiano Aiello Muhammad Akram Nawab Ali Fengpeng An Guangpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Andrej Babic Wander Baldini Andrea Barresi Eric Baussan Marco Bellato Antonio Bergnoli Enrico Bernieri David Biare Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Max Buesken Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Jinfan Chang Yun Chang Pingping Chen Po-An Chen Shaomin Chen Shenjian Chen xurong Chen Yi-Wen Chen Yixue Chen Yu Chen Zhang Chen Jie Cheng Yaping Cheng Alexander Chepurnov Davide Chiesa Pietro Chimenti Artem Chukanov Anna Chuvashova Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Salvatore Costa Flavio Dal Corso Christophe De La Taille Jiawei Deng Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Georgy Donchenko Jianmeng Dong Damien Dornic Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Lukas Fajt Donghua Fan Lei Fan Can Fang Jian Fang Marco Fargetta Anna Fatkina Dmitry Fedoseev Vladko Fekete li-Cheng Feng Qichun Feng Richard Ford Andrey Formozov Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Alexandre Göttel Christoph Genster Marco Giammarchi Agnese Giaz Nunzio Giudice Franco Giuliani Maxim Gonchar Guanghua Gong Hui Gong Oleg Gorchakov Yuri Gornushkin Marco Grassi Christian Grewing Maxim Gromov Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Nunzio Guardone Maria Gul Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yan Yerevan Physics Institute YerevanArmenia Universitélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro RioBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment engineering BeijingChina Beijing Normal university BeijingChina china Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North china Electric Power university BeijingChina school of Physics Peking UniversityBeijingChina Tsinghua university BeijingChina university of Chinese Academy of sciences BeijingChina Jilin university ChangchunChina College of Electronic science and engineering National University of Defense TechnologyChangshaChina Chongqing university ChongqingChina Dongguan university of Technology DongguanChina jinan university GuangzhouChina Sun Yat-Sen university GuangzhouChina Harbin Institute of Technology HarbinChina university of science and Technology of{2. HefeiChina The Radiochemistry and Nuclear Chemistry Group in university of South china HengyangChina Wuyi university JiangmenChina shandong university JinanChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing university NanjingChina Guangxi university NanningChina East china university of {2. and Technology ShanghaiChina school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai university TianjinChina Wuhan university WuhanChina Xi’an Jiaotong university Xi’anChina Xiamen university XiamenChina school of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of Physics National Chiao-Tung university Hsinchu National United university Miao-Li Department of Physics National T

The Jiangmen Underground Neutrino Observatory(JUNO)features a 2. kt multi-purpose underground liquid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measurements,such as its low-energy threshold,high energy resolution compared with water Cherenkov detectors,and much larger target mass compared with previous liquid scintillator *** this paper,we present a comprehensive assessment of JUNO's potential for detecting^8B solar neutrinos via the neutrino-electron elastic scattering process.A reduced 2.MeV threshold for the recoil electron energy is found to be achievable,assuming that the intrinsic radioactive background^(2.8)U and^(2.2.Th in the liquid scintillator can be controlled to 10^(-17)g/*** ten years of data acquisition,approximately 60,000 signal and 30,000 background events are *** large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter,which will shed new light on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation *** m^(2._(2.)=4.8times10^(-5);(7.5times10^(-5))eV^(2.,JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3sigma(2.igma)level by measuring the non-zero signal rate variation with respect to the solar zenith ***,JUNO can simultaneously measureDelta m^2.(2.)using^8B solar neutrinos to a precision of 2.% or better,depending on the central value,and to sub-percent precision using reactor antineutrinos.A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m^2.(2.)reported by solar neutrino experiments and the KamLAND experiment.

关键词： neutrino oscillation solar neutrino JUNO

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Mapping essential urban land use categories in china(EULUC-china):pre{2.minary results for 2.18

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science Bulletin 2020年第3期65卷 182-187页

作者： Peng Gong bin Chen xuecao li Han liu Jie Wang Yuqi Bai Jingming Chen Xi Chen Lei Fang Shuailong Feng Yongjiu Feng Yali Gong Hao Gu Huabing Huang Xiaochun Huang Hongzan Jiao Yingdong Kang Guangbin Lei Ainong li Xiaoting li xun li Yuechen li Zhilin li Zhongde li Chong liu Chunxia liu Maochou liu Shuguang liu Wanliu Mao Changhong Miao Hao Ni Qisheng Pan Shuhua Qi Zhehao Ren Zhuoran Shan Shaoqing Shen Minjun Shi Yimeng Song Mo Su Hoi Ping Suen Bo Sun Fangdi Sun Jian Sun lin Sun Wenyao Sun Tian Tian Xiaohua Tong Yihsing Tseng Ying Tu Hong Wang Lan Wang Xi Wan Zongming Wang Tinghai Wu Yaowen Xie Jian Yang Jun Yang Man Yuan Wenze Yue Hongda Zeng Kuo Zhang Neng Zhang Tao Zhang Yu Zhang Feng Zhao Yichen Zheng Qiming Zhou Nicholas Clinton Zhiliang Zhu bing xu Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Tsinghua Urban Institute Tsinghua UniversityBeijing 100084China Center for Healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing 100084China Department of Land Air and Water ResourcesUniversity of CaliforniaDavisCA 95616-8627USA Department of Geological and Atmospheric sciences Iowa State UniversityAmesIA 50011USA State Key Laboratory of Remote Sensing science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China AI for Earth Laboratory Cross-Strait InstituteTsinghua UniversityBeijing 100084China International Institute for Earth System sciences Nanjing UniversityNanjing 210093China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumchi 830011China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China National engineering Laboratory for Applied Technology in Forestry&Ecology in South{2. College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004China College of Surveying&Geo-Informatics Tongji UniversityShanghai 200092China Department of Urban Planning College of Architecture and Urban PlanningTongji UniversityShanghai 200092China Beijing Institute of Urban Planning Beijing 100045China Department of Urban Planning School of Urban DesignWuhan UniversityWuhan 430072China College of Earth sciences Jilin UniversityChangchun 130061China Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Urban and Regional Planning School of Geography and PlanningSun Yat-sen Univ

Land use reflects human activities on *** land use is the highest level human alteration on Earth,and it is rapidly changing due to population increase and *** areas have widespread effects on local hydrology,climate,biodiversity,and food production[1,2..However,maps,that contain knowledge on the distribution,pattern and composition of various land use types in urban areas,are limited to city *** mapping standard on data sources,methods,land use classification schemes varies from city to city,due to differences in financial input and skills of mapping *** address various national and global environmental challenges caused by urbanization,it is important to have urban land uses at the national and global scales that are derived from the same or consistent data sources with the same or compatible classification systems and mapping *** is because,only with urban land use maps produced with similar criteria,consistent environmental policies can be made,and action efforts can be compared and assessed for large scale environmental ***,despite of the fact that a number of urban-extent maps exist at global scales[3,4],more detailed urban land use maps do not exist at the same *** at big country or regional levels such as for the United States,china and European Union,consistent land use mapping efforts are rare[5,6](e.g.,https://***/open_land_use/).

关键词： EULUC-china 土地利用类型

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基于不同空气质量模型的二噁英沉降效果研究

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中国环境科学 2020年第1期40卷 24-30页

作者：史梦雪伯鑫田飞杨朝旭王刚马根慧贾瑜玲李时蓓朱彬南京信息工程大学大气物理学院江苏南京210044 生态环境部环境工程评估中心北京100012 国家环境保护环境影响评价数值模拟重点实验室北京100012 山东省环境保护科学研究设计院有限公司山东济南250013 吉林化工学院资源与环境工程学院吉林吉林132022 三捷环境工程咨询(杭州)有限公司浙江杭州310012 CERC环境科技(北京)有限公司北京100872 四川省环境工程评估中心四川成都610041

为评估不同空气质量模型(AERMOD、ADMS和CALPUFF)在复杂地形-气象场条件下的干湿沉降模拟效果,利用上述模型模拟我国西南某代表性山地的医废、垃圾焚烧项目的二噁英环境影响,并通过土壤实测数据进行模型分析验证.结果表明:AERMOD、ADMS... 详细信息

为评估不同空气质量模型(AERMOD、ADMS和CALPUFF)在复杂地形-气象场条件下的干湿沉降模拟效果,利用上述模型模拟我国西南某代表性山地的医废、垃圾焚烧项目的二噁英环境影响,并通过土壤实测数据进行模型分析验证.结果表明:AERMOD、ADMS和CALPUFF模拟的空气中年均浓度依次为1.53×10^-8~4.14×10^-6,5.2.×10^-9~3.2.×10^-6和2.66×10^-9~2.59×10^-7ngTEQ/m^3;AER MOD、ADMS和CALPUFF模拟的固定点位总沉降量依次为4.41~2.5.72.3.07~2.8.02.0.02.1.35ngTEQ/m^2.在扩散、沉降形态上,CALPUFF的模拟结果与其他两种模型均表现出较大差异,AERMOD和ADMS的沉降形态相似,空气中的扩散形态却存在差异.利用土壤监测值验证模型效果发现,AERMOD、ADMS和CALPUFF的相关系数r分别为0.66、0.70和0.83,CALPUFF的模拟结果在空间分布上表现更为优越,可作为相关项目的布点指导模型.

关键词：二噁英 AERMOD 沉降 ADMS CALPUFF

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纳米生物润滑剂微量润滑磨削性能研究进展

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表面技术 2023年第12期52卷 1-19,I0005页

作者：宋宇翔许芝令李长河周宗明刘波张彦彬 Yusuf Suleiman Dambatta 王大中青岛理工大学机械与汽车工程学院山东青岛266520 青岛海空压力容器有限公司山东青岛266520 汉能(青岛)润滑科技有限公司山东青岛266100 四川新航钛科技有限公司四川什邡618400 香港理工大学超精密加工技术国家重点实验室中国香港999077 艾哈迈杜·贝洛大学机械工程学院扎里亚810106 上海工程技术大学航空运输学院上海200240

微量润滑是针对浇注式和干磨削技术缺陷的理想替代方案,为了满足高温高压边界条件下磨削区抗磨减摩与强化换热需求,进行了纳米生物润滑剂作为微量润滑的雾化介质探索性研究。然而,由于纳米生物润滑剂的理化特性与磨削性能之间映射关系... 详细信息

微量润滑是针对浇注式和干磨削技术缺陷的理想替代方案,为了满足高温高压边界条件下磨削区抗磨减摩与强化换热需求,进行了纳米生物润滑剂作为微量润滑的雾化介质探索性研究。然而,由于纳米生物润滑剂的理化特性与磨削性能之间映射关系尚不清晰,纳米生物润滑剂作为冷却润滑介质在磨削中的应用仍然面临着严峻的挑战。为解决上述需求,本文基于摩擦学、传热学和工件表面完整性对纳米生物润滑剂的磨削性能进行综合性评估。首先,从基液和纳米添加相的角度阐述了纳米生物润滑剂的理化特性。其次,结合纳米生物润滑剂独特的成膜和传热能力,分析了纳米生物润滑剂优异的磨削性能。结果表明,纳米生物润滑剂优异的传热和极压成膜性能显著改善了磨削区的极端摩擦条件,相比于传统微量润滑,表面粗糙度值(Ra)可降低约10%~2..4%。进一步地,阐明了多场赋能调控策略下,磨削区纳米生物润滑剂浸润与热传递增效机制。最后,针对纳米生物润滑剂的工程和科学瓶颈提出了展望,为纳米生物润滑剂的工业应用和科学研究提供理论指导和技术支持。

关键词：磨削微量润滑纳米生物润滑剂多场赋能表面完整性理化特性

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长时间尺度下济南泉水动态特征与驱动因素演变分析

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中国岩溶 2023年第5期42卷 898-906,916页

作者：孙斌李常锁许庆宇高帅刘春伟邢立亭于令芹山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) 山东济南250014 山东省地下水环境保护与修复工程技术研究中心山东济南250014 中国海洋大学环境科学与工程学院山东青岛266100 济南大学水利与环境学院山东济南250002

为识别60多年济南市区泉水动态变化规律,以长系列动态监测资料为基础,利用相关分析、偏相关分析、回归分析及水均衡分析等方法,对泉水动态变化特征及其自然-人类活动等影响因素进行分析。结果表明:济南市区四大泉群动态经历了壮观喷涌... 详细信息

为识别60多年济南市区泉水动态变化规律,以长系列动态监测资料为基础,利用相关分析、偏相关分析、回归分析及水均衡分析等方法,对泉水动态变化特征及其自然-人类活动等影响因素进行分析。结果表明:济南市区四大泉群动态经历了壮观喷涌、景观衰减、长期间断断流和调控复涌四个变化阶段,总体表现为驱动因素逐渐增多,泉水复涌前降水量影响逐渐减弱,开采量、城市建设及水利工程影响逐渐增强,复涌后人工调控占据主导作用。定量识别出:一阶段主控因素为降水量和开采量,平均影响量58.17、-9.58万m^(3)·d^(-1),二阶段主控因素降水量、开采量和水利工程,平均影响量52.01、-42.61、-5.98万m^(3)·d^(-1),三阶段主控因素为开采量、降水量、水利工程和城市建设,平均影响量-51.82.51.42.-6.92.-2.40万m^(3)·d^(-1),四阶段主要受控降水量、开采量、生态补源、城市建设和水利工程,平均影响量为55.38、-2..44、10.36、-8.99、-6.56万m^(3)·d^(-1)。相关研究可为北方岩溶泉水保护提供依据。

关键词：济南四大泉群泉水动态特征驱动因素

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