检索结果-南通市图书馆

Correcting Climate Model.Sea Surface Temperature Simulations with Generative Adversarial Networks:Climatology,Interannual Variability,and Extremes

引用

Advances in Atmospheric Sciences 2024年第7期41卷 1299-1312页

作者： Ya WANG gang HUANG Baoxiang PAN Pengfei LIN Niklas BOerS Weichen TAO Yutong CHEN BO LIU Haijie LI State Key Laboratory of Numerical Model.ng for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Laboratory for Regional Oceanography and Numerical Model.ng Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Earth System Model.ing School of Engineering and DesignTechnical University of MunichOttobrunn 85521Germany Potsdam Institute for Climate Impact Research Potsdam 14412Germany Department of Mathematics and Global Systems Institute University of ExeterExeter EX44QEUK CMA Earth System Model.ng and Prediction Centre(CEMC) Chinese Academy of Meteorological SciencesBeijing 100081China

Climate model. are vital for understanding and projecting global climate change and its associated impacts.However,these model. suffer from biases that limit their accuracy in historical simulations and the trustworthiness of future projections.Addressing these challenges requires addressing internal variability,hindering the direct alignment between model.simulations and observations,and thwarting conventional supervised learning methods.Here,we employ an unsupervised Cycle-consistent Generative Adversarial Network(CycleGAN),to correct daily Sea Surface Temperature(SST)simulations from the Community Earth System Model.2(CESM2).Our results reveal that the CycleGAN not only corrects climatological biases but also improves the simulation of major dynamic modes including the el.Niño-Southern Oscillation(ENSO)and the Indian Ocean Dipole mode,as wel. as SST extremes.Notably,it substantially corrects climatological SST biases,decreasing the globally averaged Root-Mean-Square error(RMSE)by 58%.Intriguingly,the CycleGAN effectivel. addresses the wel.-known excessive westward bias in ENSO SST anomalies,a common issue in climate model. that traditional methods,like quantile mapping,struggle to rectify.Additionally,it substantially improves the simulation of SST extremes,raising the pattern correl.tion coefficient(PCC)from 0.56 to 0.88 and lowering the RMSE from 0.5 to 0.32.This enhancement is attributed to better representations of interannual,intraseasonal,and synoptic scales variabilities.Our study offers a novel.approach to correct global SST simulations and underscores its effectiveness across different time scales and primary dynamical modes.

关键词： generative adversarial networks model.bias deep learning el.Niño-Southern Oscillation marine heatwaves

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of La on the Corrosion Behavior and Mechanism of 3Ni Weathering Steel.in a Simulated Marine Atmospheric Environment

引用

Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 308-324页

作者： gang Niu Rui Yuan R.D.K.Misra Na Gong Zhi-Hui Zhang Hao-Xiu Chen Hui-Bin Wu Cheng-Jia Shang Xin-Ping Mao Collaborative Innovation Center of Steel.Technology University of Science and Technology BeijingBeijing100083China Laboratory for Excel.ence in Advanced Steel.Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Materials Research and Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore Department of Materials Science and Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and mechanism of 3Ni weathering steel.in a simulated oceanic atmospheric environment are investigated in order to comprehend the impacts of La,as determined through el.ctrochemical analysis and rust layer characterization.The results of this study demonstrate that the addition of La enhances the corrosion resistance of 3Ni weathering steel.in the marine atmospheric environment,thereby reducing the corrosion rate and improving the protection of the rust layer.The influence of La on corrosion resistance can be attributed to two primary factors.Firstly,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corrosion of bare steel.in the marine environment.Secondly,La inhibits the process of Fe_(3)O_(4) oxidation back toγ-FeOOH during corrosion at the local site,thus decreasing the formation ofγ-FeOOH and enhancing the charge transfer resistance.This research work may serve as a reference for expanding the application of rare earth el.ments in the fiel. of weathering steel.

关键词： Weathering steel Rare earth Rust layer Corrosion behavior Corrosion resistance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exploration of pathogenic microorganism within the small intestine of necrotizing enterocolitis

引用

World Journal of Pediatrics 2024年第2期20卷 165-172页

作者： Yan Wang Kun Jiang Qiao Xia Xia Kang Shan Wang Ji-Hong Yu Wen-Feng Ni Xiao-Qin Qi Ying-Na Zhang Jin-Bao Han gang Liu Lei Hou Zhi-Chun Feng Liu-Ming Huang Clinical Biobank Center Medical Innovation Research Division of ChinesePLA General HospitalBeijingChina Institute of Basic Medical Sciences Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Senior Department of Pediatrics The Seventh Medical Center of PLA General HospitalBeijing 100700China Department of Neurology The First Medical CenterChinese PLA General HospitalBeijing 100853China Department of Emergency Center National Center for Children's HealthBeijing Children's HospitalCapital Medical UniversityBeijing 100045China

Background Necrotizing enterocolitis(NEC)is the most common severe gastrointestinal emergency in neonates.We designed this study to identify the pathogenic microorganisms of NEC in the microbiota of the small intestine of neonates.Methods Using the 16S ribosomal DNA(rDNA)sequencing method,we compared and analyzed the structure and diversity of microbiotas in the intestinal feces of different groups of neonates:patients undergoing jejunostomy to treat NEC(NP group),neonates undergoing jejunostomy to treat other conditions(NN group),and neonates with NEC undergoing conservative treatment(NC group).We took intestinal feces and saliva samples from patients at different time points.Results The beta diversities of the NP,NN,and NC groups were all similar.When comparing the beta diversities between different time points in the NP group,we found similar beta diversities at time points el.to E3 but significant differences between the E2-E3 and E4 time points:the abundances of Klebsiel.a and Enterococcus(Proteobacteria)were higher at the E1-E3 time points;the abundance of Escherichia-Shigel.a(Proteobacteria)increased at the E2 time point,and the abundance of Klebsiel.a decreased significantly,whereas that of Streptococcus increased significantly at the E4 time point.Conclusions Our results suggest that the pathological changes of intestinal necrosis in the small intestine of infants with NEC are not directly caused by excessive proliferation of pathogenic bacteria in the small intestine.The sources of microbiota in the small intestine of neonates,especially in premature infants,may be affected by multiple factors.

关键词： Microbiota Necrotizing enterocolitis-Small intestine 16S rDNA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microplastic contamination in lacustrine sediments in the Qinghai-Tibet Plateau:Current status and transfer mechanisms

引用

China Geology 2022年第3期5卷 421-428页

作者： Rui-ping Liu Fei Liu Ying Dong Jian-gang Jiao el.Wardany RM Li-feng Zhu Xi’an center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Shaanxi Province Water Resources and Environment Engineering Technology Research Center Xi’an 710054China Western Green Devel.pment Research Institute China Geological SurveyXi’an 710054China Key Laboratory for Geo-hazards in Loess Area Ministry of Natural ResourcesXi’an 710054China Fiel. Base of Scientific Observation of Shaanxi Tongguan Ministry of Natural ResourcesXi’an 710054China Dalian Ocean and Fishery Comprehensive Administration Supervision Lochus Dalian 116000China Key Laboratory of Western China’s Mineral Resource and Geological Engineering Ministry of EducationXi’an 710054China School of Earth Science and Land Resources of Chang’an University Xi’an 710054China Assiut Branch Al-Azhar UniversityAssiut 71524Egypt

This paper aims to investigate the present situation and transfer mechanisms of microplastics in lacustrine sediments in the Qinghai-Tibet Plateau.The study surveyed the average abundance of microplastics in sediments.The abundance of microplastics in sediments of lakes from the Qinghai-Tibet Plateau is 17.22-2643.65 items/kg DW and 0-60.63 items/kg DW based on the data of the Qinghai Lake and the Siying Co Basin.The microplastic abundance in sediments from small and medium lakes is very high compared to that in other areas in the world.Like microplastics in other lakes of the world,those in the lakes in the Qinghai-Tibet Plateau mainly include organic polymers PA,PET,PE,and PP and are primarily in the shape of fibers and fragments.The microplastic pollution of lacustrine sediments in the Qinghai-Tibet Plateau is affected by natural changes and by human activities,and the concentration of microplastics in lacustrine ecosystems gradually increases through food chains.Furthermore,the paper suggests the rel.vant administrative departments of the Qinghai-Tibet Plateau strengthen waste management while devel.ping tourism and pay much attention to the impacts of microplastics in water environments.This study provides a reference for preventing and controlling microplastic contamination in the Qinghai-Tibet Plateau.

关键词： Microplastic pollution Environmental pollution Lake Lacustrine sediment Qinghai Lake Ecological risks Hydrogeological engineering Ecological engineering Qinghai-Tibet Plateau China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

从能量学角度理解气候背景场对ENSO热带和热带外遥相关的影响

引用

大气科学 2024年第1期48卷 218-227页

作者：黄刚胡开明唐颢苏汪亚屈侠赵桂洁中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室北京100029 中国科学院大气物理研究所季风系统研究中心北京100190 中国科学院大学北京100049 北京市气象台北京100097

厄尔尼诺—南方涛动(el.Ni?o-Southern Oscillation,简称ENSO)通过遥相关过程影响全球天气气候。在热带地区,ENSO能通过影响热带对流层温度导致遥远海盆降水和海表温度异常;在热带外,ENSO能通过激发准定常罗斯贝波动造成北美、亚洲等地... 详细信息

厄尔尼诺—南方涛动(el.Ni?o-Southern Oscillation,简称ENSO)通过遥相关过程影响全球天气气候。在热带地区,ENSO能通过影响热带对流层温度导致遥远海盆降水和海表温度异常;在热带外,ENSO能通过激发准定常罗斯贝波动造成北美、亚洲等地区气候异常。气候背景场对ENSO热带和热带外遥相关有重要影响。一方面,气候背景大气环流场可以通过正压和斜压能量转换影响ENSO遥相关波列的位置和强度。另一方面,热带气候背景海温和对流场会通过影响湿静力能分布影响ENSO热带遥相关过程。这些研究表明分析能量过程有助于理解气候背景场影响ENSO遥相关的机理。本文回顾了近几十年来国内外关于气候背景场对ENSO热带与热带外遥相关影响的能量分析研究进展,在此基础上,回顾了全球变暖背景下ENSO遥相关的可能变化,并提出了一些未来该领域内需要进一步研究的科学问题。

关键词：厄尔尼诺—南方涛动热带遥相关热带外遥相关全球变暖能量学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

参数优化设计与TRIZ理论集成设计方法研究

引用

机械设计与制造 2024年第1期395卷 23-29页

作者：刘尚郭霄霞韩刚王红艳齐齐哈尔大学机电工程学院黑龙江齐齐哈尔161006

为消除存在于设计方案中的设计冲突,扩展可行解的备选空间,在研究设计冲突的捕捉方法以及资源引入的要求的基础上,提出将参数优化设计与TRIZ理论集成的设计方法。分析了参数优化设计问题的分类以及冲突的特点,提出了以ENV(el.ment Name ... 详细信息

为消除存在于设计方案中的设计冲突,扩展可行解的备选空间,在研究设计冲突的捕捉方法以及资源引入的要求的基础上,提出将参数优化设计与TRIZ理论集成的设计方法。分析了参数优化设计问题的分类以及冲突的特点,提出了以ENV(el.ment Name Value)模型来表达优化设计冲突的方法,该方法用于支持优化设计冲突向TRIZ冲突问题的模型转化。提出了优化设计冲突的四种求解方法及冲突求解路径,构建了参数优化设计与TRIZ结合应用的过程模型,并解释了过程模型中的关键步骤。应用所提出的方法对X型竖矩形驳接爪进行再设计,应用Ansys Workbench进行参数优化设计及仿真,通过仿真数据的对比验证所提出的方法的有效性。

关键词：概念设计参数优化设计 TRIZ 冲突网络

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

不同机用镍钛器械在后牙根管治疗中的应用

引用

海南医学 2024年第8期35卷 1124-1127页

作者：郭莉莉魏士刚刘纪雷河南中医药大学第一附属医院口腔科河南郑州450000

目的比较不同机用镍钛器械在后牙根管治疗中的临床应用效果。方法回顾性分析2021年1月至2021年6月于河南中医药大学第一附属医院口腔科行磨牙根管治疗的72例患者的临床资料,根据采用机用镍钛器械的不同分为A组、B组和C组各24例。所有患... 详细信息

目的比较不同机用镍钛器械在后牙根管治疗中的临床应用效果。方法回顾性分析2021年1月至2021年6月于河南中医药大学第一附属医院口腔科行磨牙根管治疗的72例患者的临床资料,根据采用机用镍钛器械的不同分为A组、B组和C组各24例。所有患者均接受后牙根管治疗,A组采用Wave One Gold机用镍钛器械治疗,B组采用Protaper Gold机用镍钛器械治疗,C组采用Protaper Universal机用镍钛器械治疗。比较三组每个根管预备时间、根管充填质量、临床疗效、牙根微裂情况及术后疼痛情况。结果A组患者的每个根管预备时间为(29.35±4.20)s,明显短于B组的(87.42±8.56)s和C组的(88.23±8.79)s,差异有统计学意义(P0.05);A组、B组、C组患者的根管充填质量合格率分别为92.13%、96.47%、94.81%,治疗的总有效率分别为95.83%、91.67%、95.83%,牙根微裂发生率分别为4.17%、4.17%、8.33%,差异均无统计学意义(P>0.05);术后24 h内,三组患者的术后疼痛分级比较差异无统计学意义(P>0.05)。结论Wave One Gold、Protaper Universal、Protaper Gold机用镍钛器械在后牙根管治疗中疗效确切,相比于Wave One Gold,Protaper Universal、Protaper Gold的预备时间较长,且三者均不会明显增加牙根微裂发生率与术后疼痛程度。

关键词：镍钛器械根管预备临床疗效牙根微裂疼痛

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

内嵌复合轻集料隔墙大板的装配式混凝土框架抗震性能试验研究

引用

工业建筑 2024年第5期54卷 159-169页

作者：王波王宁王静峰陈刚程涛合肥工业大学土木与水利工程学院合肥230009 土木工程结构与材料安徽省重点实验室合肥230009 安徽建工集团股份有限公司合肥230031

为了研究内嵌复合轻集料隔墙大板装配式钢筋混凝土(RC)框架的抗震性能,对1榀装配式混凝土空框架、1榀加气混凝土砌块填充墙-装配式混凝土框架和1榀复合轻集料墙板-装配式混凝土框架进行了低周往复荷载试验。研究了地震作用下墙板与框架... 详细信息

为了研究内嵌复合轻集料隔墙大板装配式钢筋混凝土(RC)框架的抗震性能,对1榀装配式混凝土空框架、1榀加气混凝土砌块填充墙-装配式混凝土框架和1榀复合轻集料墙板-装配式混凝土框架进行了低周往复荷载试验。研究了地震作用下墙板与框架的协同受力性能和工作机理,分析了结构的破坏特征、荷载-位移曲线、刚度退化、延性性能以及耗能能力等。试验结果表明:复合轻集料隔墙大板内嵌连接安全可靠,有效确保了复合轻集料墙板与框架在地震作用下的协同工作;与加气混凝土填充墙相比,复合轻集料大板对框架的极限水平承载力和初始刚度均显著提高;复合轻集料墙板-装配式RC框架的弹性位移角平均值θ_(y)及弹塑性极限位移角平均值θ_(u)均满足GB 50011—2010《建筑抗震设计规范》要求;基于试验结果,提出了结构的恢复力模型,并验证了模型具有很好的吻合度,为内嵌复合轻集料隔墙大板在装配式结构中的应用提供了理论依据。

关键词：复合轻集料墙板装配式混凝土框架抗震性能恢复力模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Strength-ductility synergy in a 1.4 GPa austenitic steel.with a heterogeneous lamel.ar microstructure

引用

Journal of Materials Science & Technology 2022年第11期106卷 133-138页

作者： gang Niu Hatem S.Zurob R.D.K.Misra Huibin Wu Yu Zou Department of Materials Science and Engineering University of TorontoTorontoONM5S 3E4Canada Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering McMaster UniversityHamiltonONL8S 4L7Canada Department of Metallurgical Materials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX 79968USA Collaborative Innovation Center of Steel.Technology University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering University of TorontoTorontoONM5S 3E4Canada

1.Introduction Advanced high-strength steel. with good ductility are essen-tial to the manufacturing,structural safety,and light-weighting of load-bearing structures in many industries[1-3].Austenitic stain-less steel.ASS)exhibits high ductility due to the TRIP and/or TWIP effect that can alleviate stress concentration,prevent void nucle-ation,enhance work hardening,and postpone necking[4-6].The yiel. strength of conventional ASS is generally low(∼200-500 MPa),and their deformation resistance is insufficient for many load-bearing applications[6].Previous studies reported the in-creased yiel. strength in various austenitic steel. through grain refinement,dislocation strengthening,precipitation strengthening,and heterogeneous hardening[7-14].A single strengthening mech-anism,however,is typically insufficient to obtain ultrahigh yiel. strength over 1 GPa in austenitic steel.12].

关键词： steel ductility austenitic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

望谟紫芽茶树优良品系‘W016’与黄金芽抗茶蚜性能比较

引用

环境昆虫学报 2024年第1期46卷 261-269页

作者：吴梦阳蒋文彬谢碧陈仓权何应琴牛素贞赵德刚贵州大学茶学院贵阳550025 贵州省农业科学院农业农村部植物新品种测试贵阳分中心贵阳550006

茶蚜Toxoptera aurantii Boyer是茶树上的重要害虫之一,深入研究抗蚜特异资源的抗性机理对培育茶树抗蚜品种具有重要意义。课题组前期收集的望谟紫芽茶树优良品系‘W016’对茶蚜抗性强,为初步探明该种质的抗蚜特性,利用刺吸电位技术测... 详细信息

茶蚜Toxoptera aurantii Boyer是茶树上的重要害虫之一,深入研究抗蚜特异资源的抗性机理对培育茶树抗蚜品种具有重要意义。课题组前期收集的望谟紫芽茶树优良品系‘W016’对茶蚜抗性强,为初步探明该种质的抗蚜特性,利用刺吸电位技术测定了茶蚜在‘W016’和黄金芽(感虫品种)上的取食行为,并探明影响茶蚜刺探取食叶片的主要物理性状及生化成分因子。结果表明,茶蚜在两种供试种质上均产生9种EPG波形,依次为非刺探波(np波)、路径波(A波、B波、C波、pd波)、机械阻力波(F波)、木质部吸食波(G波)、韧皮部唾液分泌波(el.)和韧皮部汁液吸食波(E2波)。刺探取食过程中,茶蚜在‘W016’上的非刺探时间(np波)和C波总持续时间均显著长于黄金芽。二者口针遇到阻力的次数(F波)和总持续时间无差异,但韧皮部吸食汁液(E2波)时间‘W016’显著短于黄金芽。茸毛密度、下表皮厚度和栅栏组织厚度是‘W016’抗茶蚜取食胁迫的主要物理屏障因子,而咖啡碱和可溶性糖含量为主要生化因子。表明‘W016’对茶蚜的取食抗性与其叶片理化性质密切相关。

关键词：茶蚜取食行为物理性状营养成分抗虫特性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：