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Comparative study of different machine learning models in landslide susceptibility assessment: A case study of Conghua District, Guangzhou, China

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China Geology 2024年第1期7卷 104-115页

作者： Ao Zhang Xin-wen Zhao Xing-yuezi Zhao Xiao-zhan Zheng Min Zeng xuan Huang Pan Wu Tuo Jiang Shi-chang Wang Jun He yi-yong Li Wuhan Center China Geological SurveyMinistry of Natural Resources(Geosciences Innovation Center of Central South China)Wuhan 430205China Guangzhou Institute of Geological Survey Guangzhou 510080China Hubei Transportation Planning Design Institute Co. LtdWuhan 430050China

Machine learning is currently one of the research hotspots in the field of landslide *** clarify and evaluate the differences in characteristics and prediction effects of different machine learning models,Conghua District,which is the most prone to landslide disasters in Guangzhou,was selected for landslide susceptibility *** evaluation factors were selected by using correlation analysis and variance expansion factor *** four machine learning methods namely Logistic Regression(LR),Random Forest(RF),Support Vector Machines(SVM),and Extreme Gradient Boosting(XGB),landslide models were *** analysis and evaluation of the model were conducted through statistical indices and receiver operating characteristic(ROC)*** results showed that LR,RF,SVM,and XGB models have good predictive performance for landslide susceptibility,with the area under curve(AUC)values of 0.752,0.965,0.996,and 0.998,*** model had the highest predictive ability,followed by RF model,SVM model,and LR *** frequency ratio(FR)accuracy of LR,RF,SVM,and XGB models was 0.775,0.842,0.759,and 0.822,*** and XGB models were superior to LR and SVM models,indicating that the integrated algorithm has better predictive ability than a single classification algorithm in regional landslide classification problems.

关键词： Landslides susceptibility assessment Machine learning Logistic Regression Random Forest Support Vector Machines XGBoost Assessment model Geological disaster investigation and prevention engineering

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区县域土地利用碳排放模型在上海崇明区的应用

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环境监测管理与技术 2024年第4期36卷 87-91页

作者：周怿韩震翁暄杨瑞妮上海海洋大学海洋科学与生态环境学院上海201306 上海河口海洋测绘工程技术研究中心上海201306

以上海崇明区为研究区域,在传统省域碳排放模型的基础上,提出一种区县域碳排放模型估算崇明区2015年、2017年、2019年和2021年碳排放,并利用LMDI模型分析了碳排放驱动因素。结果表明,崇明岛碳排放总体呈减少趋势,长兴岛和横沙岛碳排放... 详细信息

以上海崇明区为研究区域,在传统省域碳排放模型的基础上,提出一种区县域碳排放模型估算崇明区2015年、2017年、2019年和2021年碳排放,并利用LMDI模型分析了碳排放驱动因素。结果表明,崇明岛碳排放总体呈减少趋势,长兴岛和横沙岛碳排放呈增长趋势;经济效应对崇明区碳排放增加有正向驱动作用,结构效应和技术效应能够有效抑制碳排放,人口效应对崇明区碳排放影响较小;面向“碳中和岛”“低碳岛”和“零碳岛”目标,须因地制宜采取增汇和减排措施。

关键词：碳排放模型 LMDI模型土地利用区县域崇明区

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平屋面摩擦速度的数值模拟研究

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工程力学 2024年第2期41卷 151-159页

作者：辛林桂周晅毅顾明同济大学土木工程防灾国家重点实验室上海200092

建筑屋面的摩擦速度是决定其风致迁移雪荷载的重要因素。该文采用CFD(computational fluid dynamics)方法模拟了平屋面的摩擦速度,并结合其分布特征分析了屋面积雪传输率、侵蚀通量和暴露系数随跨度的变化趋势。为验证CFD方法的湍流模... 详细信息

建筑屋面的摩擦速度是决定其风致迁移雪荷载的重要因素。该文采用CFD(computational fluid dynamics)方法模拟了平屋面的摩擦速度,并结合其分布特征分析了屋面积雪传输率、侵蚀通量和暴露系数随跨度的变化趋势。为验证CFD方法的湍流模型对平屋面摩擦速度模拟的影响,将数值模拟结果与Irwin探头风洞试验进行了对比,结果表明Realizable k-ε湍流模型的模拟结果与风洞试验最为接近。根据4种不同跨度屋面的CFD模拟结果发现,当屋面跨度与高度之比为4时,屋面平均摩擦速度最小;并且随着跨度的增大,屋面摩擦速度最小值所在的位置和积雪沉积的区域均逐渐向迎风侧屋檐靠近。同时发现,屋面积雪的平均侵蚀通量随着跨度的增大而减小,屋面积雪传输率和雪荷载暴露系数则随着跨度的增大而增大。

关键词：计算流体动力学(CFD) 平屋面 Irwin探头摩擦速度积雪传输率

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Tongxinluo Activates PI3K/AKT Signaling Pathway to Inhibit Endothelial Mesenchymal Transition and Attenuate Myocardial Fibrosis after Ischemia-Reperfusion in Mice

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Chinese Journal of Integrative Medicine 2024年第7期30卷 608-615页

作者： WEI Ya-ru HOU Yun-long yiN Yu-jie LI Zhen LIU yi HAN Ning-xin WANG Zi-xuan LIU Lu WANG Xiao-qi HAO Yuan-jie MA Kun GU Jiao-jiao JIA Zhen-hua Graduate School Hebei University of Chinese MedicineShijiazhuang050090China Shijiazhuang yiling Pharmaceutical New Drug Evaluation Center Shijiazhuang050035China Hebei Institute of Integrated Traditional and Western Medicine Shijiazhuang050035China National Key Laboratory for Innovation and Transformation of Luobing Theory Shijiazhuang050035China Department of Cardiology Hebei Yiling HospitalShijiazhuang050091China Graduate School Hebei Medical UniversityShijiazhuang050017China

Objective To investigate the potential role of Tongxinluo(TXL)in attenuating myocardial fibrosis after myocardial ischemia-reperfusion injury(MIRI)in *** A MIRI mouse model was established by left anterior descending coronary artery ligation for 45 *** to a random number table,66 mice were randomly divided into 6 groups(n=11 per group):the sham group,the model group,the LY-294002 group,the TXL group,the TXL+LY-294002 group and the benazepril(BNPL)*** day after modeling,TXL and BNPL were administered by *** injection of LY-294002 was performed twice a week for 4 consecutive *** was used to measure cardiac function in *** staining was used to evaluate the degree of myocardial fibrosis in *** and quantitative analysis of endothelial mesenchymal transition(EndMT)after MIRI was performed by immunohistochemistry,immunofluorescence staining and flow cytometry,*** protein expressions of platelet endothelial cell adhesion molecule-1(CD31),α-smoth muscle actin(α-SMA),phosphatidylinositol-3-kinase(PI3K)and phospho protein kinase B(p-AKT)were assessed using Western *** TXL improved cardiac function in MIRI mice,reduced the degree of myocardial fibrosis,increased the expression of CD31 and inhibited the expression ofα-SMA,thus inhibited the occurrence of EndMT(P0.05).In addition,the use of the PI3K/AKT pathway-specific inhibitor LY-294002 to block this pathway and combination with TXL intervention,eliminated the protective effect of TXL,further supporting the protective effect of *** TXL activated the PI3K/AKT signaling pathway to inhibit EndMT and attenuated myocardial fibrosis after MIRI in mice.

关键词： myocardial fibrosis endothelial mesenchymal transition myocardial ischemia-reperfusion injury phosphatidylinositol-3-kinase/protein kinase B(PI3K/AKT)pathway

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Use of Evidence-Based Research Approach in RCTs of Acupuncture-Related Therapies for Primary Dysmenorrhea: A Meta-Research

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Chinese Journal of Integrative Medicine 2024年第6期30卷 551-558页

作者： HU Xiao-yi TIAN Zi-yu CHEN Huan HU Xiang-yu MING Tian-yu PENG Hao-xuan JIAO Rui-min SHI Lan-jun XIU Wen-cui YANG Ji-wei GANG Wei-juan JING Xiang-hong Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijingChina Department of Traditional Chinese Medicine Beijing Puren HospitalBeijing100062China

Objective To assess the use of evidence-based research(EBR)approach in randomized controlled trials(RCTs)of acupuncture-related therapies for primary dysmenorrhea(PD).Methods PubMed,EMBASE,Cochrane Library,China National Knowledge Infrastructure,Wanfang Database,Chinese Biomedical Database,and China Science and Technology Journal Database were searched from January 2013 to December 2022 for RCTs of acupuncture on *** full text and references of each RCT were read to assess whether systematic reviews(SRs)or other types of studies with similar research questions and end-users’perspectives were cited to justify and design the *** addition,the discussion section were analyzed to evaluate whether trials placed the new result in the existing SRs to draw a *** logistic regression was used to find variables that associated with 3 aspects of EBR approach:(1)citing clinical studies for justification,(2)citing relevant studies that obtain the perspectives of end users,and(3)citing clinical studies for results *** Of 473 RCTs included,45.67%(216)of the trials cited relevant similar studies,21.56%(102)referenced to the studies that collected end-users’perspectives,and 10.99%(52)placed result in the context of the previous *** RCTs appropriately applied EBR *** all the included studies,3.17%(15)of the trials used SRs to inform study questions but none of them used updated SRs with acceptable quality;1.05%(5)of the trials cited SRs of end-user’s perspectives in the justification and design of the study,and only 1 trial added results in existing SR to draw a *** of publication,language,funding,registration,ethical approval and number of sites were significantly associated with 1 of the 3 aspects of EBR *** Few RCTs in acupuncture-related therapies for PD used the EBR approach to minimize research ***,research institutes,funding agencies,ethics committees,journals and peer

关键词： evidence-based research acupuncture therapy primary dysmenorrhea randomized controlled trial systematic review end-usersperspective meta-research

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用于人机交互设备的本征可拉伸功能器件和高分子材料

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高分子学报 2024年第6期55卷 637-654页

作者：李松壕孙明源魏子翔王以轩胡文平天津大学有机集成电路教育部重点实验室天津市分子光电科学重点实验室化学系天津大学化学化工协同创新中心

在物联网飞速发展的智能时代，高分子光电材料具有更低的杨氏模量和更好的本征拉伸性，成为人机交互设备的理想选择.本文从平衡高分子光电材料电学(载流子传输需求)和力学(可拉伸需求)性能这一难点出发，根据可拉伸器件在人机交互中的... 详细信息

在物联网飞速发展的智能时代，高分子光电材料具有更低的杨氏模量和更好的本征拉伸性，成为人机交互设备的理想选择.本文从平衡高分子光电材料电学(载流子传输需求)和力学(可拉伸需求)性能这一难点出发，根据可拉伸器件在人机交互中的应用功能，总结了供能、传感、神经接口和显示等功能模块材料/器件方面的创新性成果，分析了各功能器件及多功能集成面临的共性问题，并展望了智能人机交互系统的发展前景.介绍了本征可拉伸功能器件包括有机太阳能电池(OSCs)、有机热电器件(o TEGs)、离子电池、纳米发电机(NGs)和超级电容器(SCs)，有机光电探测器(OPDs)、化学传感器和热传感器，多模态阵列电极(MEAs)和有机电化学晶体管(OECTs)，有机电化学发光器件(OLECs)、有机电致变色显示器(OECDs)和有机发光二极管(OLEDs)，有机场效应晶体管(OFETs)和多功能集成系统等.分析表明，可拉伸高分子光电材料的光电性能进一步提升和各功能层间的动态稳定界面，是未来研究重点.

关键词：人机交互高分子光电材料光电器件本征可拉伸

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Safety, immunogenicity and protective effectiveness of heterologous boost with a recombinant COVID-19 vaccine (Sf9 cells) in adult recipients of inactivated vaccines

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Signal Transduction and Targeted Therapy 2024年第3期9卷 1165-1173页

作者： Wenxin Luo Jiadi Gan Zhu Luo Shuangqing Li Zhoufeng Wang Jiaxuan Wu Huohuo Zhang Jinghong Xian Ruixin Cheng Xiumei Tang yi Liu Ling Yang Qianqian Mou Xue Zhang yi Chen Weiwen Wang Yantong Wang Lin Bai xuan Wei Rui Zhang Lan Yang Yaxin Chen Li Yang Yalun Li Dan Liu Weimin Li Lei Chen Department of Pulmonary and Critical Care Medicine West China HospitalSichuan UniversityChengduChina Institute of Respiratory Health Frontiers Science Center for Disease-related Molecular NetworkWest China HospitalSichuan UniversityChengduChina Precision Medicine Center Precision Medicine Key Laboratory of Sichuan ProvinceWest China HospitalSichuan UniversityChengduChina State Key Laboratory of Respiratory Health and Multimorbidity West China HospitalChengduChina Institute of Respiratory Health and Multimorbidity West China HospitalSichuan UniversityChengduChina Clinical Trial Center West China HospitalSichuan UniversityChengduChina General Practice Medical Center West China HospitalSichuan UniversityChengduChina Fangcao Community Health Service Center of Chengdu High-tech Zone ChengduChina The Research Units of West China Chinese Academy of Medical SciencesWest China HospitalChengduChina West China School of Nursing Sichuan UniversityChengduChina Department of Infection Control West China HospitalSichuan UniversityChengduChina Department of Pathology West China HospitalSichuan UniversityChengduChina Department of Respiratory and Critical Care Medicine the First Affiliated Hospital of Chongqing Medical UniversityChongqingChina Department of Neurology West China HospitalSichuan UniversityChengduChina

Vaccines have proven effective in protecting populations against COVID-19,including the recombinant COVID-19 vaccine(Sf9 cells),the first approved recombinant protein vaccine in *** this positive-controlled trial with 85 adult participants(Sf9 cells group:n=44;CoronaVac group:n=41),we evaluated the safety,immunogenicity,and protective effectiveness of a heterologous boost with the Sf9 cells vaccine in adults who had been vaccinated with the inactivated vaccine,and found a post-booster adverse events rate of 20.45%in the Sf9 cells group and 31.71%in the CoronaVac group(p=0.279),within 28 days after booster *** group reported any severe adverse *** the Sf9 cells vaccine booster,the geometric mean titer(GMT)of binding antibodies to the receptor-binding domain of prototype SARS-CoV-2 on day 28 post-booster was significantly higher than that induced by the CoronaVac vaccine booster(100,683.37 vs.9,451.69,p<0.001).In the Sf9 cells group,GMTs of neutralizing antibodies against pseudo SARS-CoV-2 viruses(prototype and diverse variants of concern[VOCs])increased by 22.23–75.93 folds from baseline to day 28 post-booster,while the CoronaVac group showed increases of only 3.29–10.70 ***,neutralizing antibodies against live SARS-CoV-2 viruses(prototype and diverse VOCs)increased by 68.18–192.67 folds on day 14 post-booster compared with the baseline level,significantly greater than the CoronaVac group(19.67–37.67 folds).A more robust Th1 cellular response was observed with the Sf9 cells booster on day 14 post-booster(mean IFN-γ+spot-forming cells per 2×105 peripheral blood mononuclear cells:26.66 vs.13.59).Protective effectiveness against symptomatic COVID-19 was approximately twice as high in the Sf9 cells group compared to the CoronaVac group(68.18%vs.36.59%,p=0.004).Our study findings support the high protective effectiveness of heterologous boosting with the recombinant COVID-19 vaccine(Sf9 cells)against symptomatic COVID-19 of dive

关键词： protective vaccine boost

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国六轻型汽油车温室气体排放特征

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中国环境科学 2024年第2期44卷 679-685页

作者：尹黛霖艾力力温溢中国汽车技术研究中心有限公司天津300300

采用全球统一轻型车辆测试循环工况(WLTC)下实测的方法,对84辆国六轻型汽油车的温室气体排放进行研究,其中包括6辆混合动力车辆.结果表明,车辆的温室气体排放基本呈现随着排量增大而上升的趋势,大排量车辆通常具有更复杂的发动机设计,... 详细信息

采用全球统一轻型车辆测试循环工况(WLTC)下实测的方法,对84辆国六轻型汽油车的温室气体排放进行研究,其中包括6辆混合动力车辆.结果表明,车辆的温室气体排放基本呈现随着排量增大而上升的趋势,大排量车辆通常具有更复杂的发动机设计,增加了温室气体的排放不确定性.各类车辆的CH_(4)和N_(2)O经温室气体变暖潜值转换后引起的CO_(2)增长率都小于1%,由此说明车辆尾气中产生的CO_(2)排放仍是温室气体的主要来源.此外,国六轻型汽油车的温室气体排放特征与其发动机技术也密切相关,不可插电式混合动力车辆的温室气体排放量能降低23.4%~27.9%.

关键词：温室气体轻型车 WLTC测试发动机技术

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Stratigraphic framework and sedimentary evolution during the Cryogenian-Ediacaran transition in northeastern Sichuan Basin,South China

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Petroleum Science 2024年第2期21卷 823-835页

作者： yi Zhang Hong-Wei Kuang Yong-Qing Liu Qiang Shi Dong-Ge Wang Ke-Ning Qi Yu-Chong Wang Da-Wei Qiao Xiao-Shuai Chen Li-Zhi Wu Meng Tian Long Chen yi Wei Liao-Yuan Song Jian Li Zi-Gang Wu Yun-Qian Liu xuan-Chun Liu An-Qing Chen Zhi-Wei Liao Institute of Geology Chinese Academy of Geological SciencesBeijing100037China State Key Laboratory of Coal Mine Disaster Dynamics and Control School of Resources and Safety EngineeringChongqing UniversityChongqing400044China No.205 Geological Team Chongqing Bureau of Geology and Minerals ExplorationChongqing401121China Chongqing Institute of Geological Survey Chongqing401122China Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of TechnologyChengdu610059SichuanChina

The northeastern Sichuan area in the northern Yangtze margin has unique Ediacaran geological records,especially the Doushantuo Formation(DST),and become a hot research area in recent ***,the Cryogenian-Ediacaran(C-E)boundary has not been precisely identified,which restricts the in-depth study of geological information during this crucial transitional period and is unfavorable for a systematic and complete understanding of the Yangtze Block and even the global paleogeographic *** study conducted stratigraphy,sedimentology,and chronostratigraphy to establish the stratigraphic framework and sedimentary evolution of the C-E transition strata in northeastern *** results showed that the Ediacaran sediments,without the cap dolomite,unconformably overlaid the Cryogenian sediments in the studied *** Member II of the DST,characterized by 50-160 m of red-green sandstone(approximately equivalent to the original Chengkou“Guanyinya Formation”),directly overlaid the Cryogenian sediments and displayed a 623±2.3 Ma maximum depositional age from the detrital zircon U-Pb *** stratigraphic correlations indicate that the C-E transition strata in northeastern Sichuan had a consistent lithological association and sedimentary sequence characteristics but differed from the Three ***,the upper Nantuo massive glacial diamictites transition to the icebergs rafted lonestone-bearing mudstones at the top,then change upward to DST barrier coast *** proposed DST of the northeastern Sichuan Basin was divided into three lithostratigraphic members without the regional Member I cap dolomite:(i)Member II purple-red,gray-green sandstone strata,(ii)MemberⅢblack mudstone strata,and(iii)Member IV P-Mn bearing *** the C-E transition,the study area experienced(i)the global deglaciation stage in the terminal Marinoan glaciation and(ii)the filling-leveling up stage with clastic rocks in the early ***,the early Ediacaran

关键词： Marinoan glaciation Doushantuo formation Cap dolomite Deglacial and coastal deposits Detrital zircon U-Pb dating

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蜂窝多孔结构表面强化沸腾传热的数值模拟研究

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工程热物理学报 2024年第5期45卷 1470-1475页

作者：洪敏张轩莫冬传吕树申衡益中山大学计算机学院广州510006 中山大学材料学院深圳518107 广东省先进热控材料与系统集成工程技术研究中心广州510275

本文将CT扫描获取的蜂窝多孔表面的3D几何结构用于池沸腾两相流数值模拟,完整地模拟了气泡成核、生长及脱离的过程。气泡动力学以及加热面热流密度分布表明蜂窝多孔表面的孔洞约束了气泡生长及合并,使得气泡脱离直径较小,脱离频率加快... 详细信息

本文将CT扫描获取的蜂窝多孔表面的3D几何结构用于池沸腾两相流数值模拟,完整地模拟了气泡成核、生长及脱离的过程。气泡动力学以及加热面热流密度分布表明蜂窝多孔表面的孔洞约束了气泡生长及合并,使得气泡脱离直径较小,脱离频率加快。成核位点数目增多,单位时间脱离壁面的气泡数目增多。因此,蜂窝多孔表面具有的蜂窝孔可以加速气泡脱离以及具有丰富的成核位点是增强加热面整体散热性能的主要原因。

关键词：蜂窝多孔表面 CT扫描池沸腾数值模拟

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