检索结果-南通市图书馆

Adaptive Trajectory Tracking Control for Nonholonomic Wheeled Mobile Robots:A Barrier Function Sliding Mode Approach

引用

IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 1007-1021页

作者： Yunjun zheng Jinchuan zheng Ke Shao Han Zhao Hao xie Hai Wang the School of Mechanical Engineering Hefei University of TechnologyHefei 230009China the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthorn VIC 3122Australia the School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072China the Shanghai Aerospace Control Technology Institute Shanghai 201109 the School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China the College of Science HealthEngineering and EducationMurdoch UniversityPerth WA6150Australia

The trajectory tracking control performance of nonholonomic wheeled mobile robots(NWMRs)is subject to nonholonomic constraints,system uncertainties,and external disturbances.This paper proposes a barrier function-based adaptive sliding mode control(BFASMC)method to provide high-precision,fast-response performance and robustness for NWMRs.Compared with the conventional adaptive sliding mode control,the proposed control strategy can guarantee that the sliding mode variables converge to a predefined neighborhood of origin with a predefined reaching time independent of the prior knowledge of the uncertainties and disturbances bounds.Another advantage of the proposed algorithm is that the control gains can be adaptively adjusted to follow the disturbances amplitudes thanks to the barrier function.The benefit is that the overestimation of control gain can be eliminated,resulting in chattering reduction.Moreover,a modified barrier function-like control gain is employed to prevent the input saturation problem due to the physical limit of the actuator.The stability analysis and comparative experiments demonstrate that the proposed BFASMC can ensure the prespecified convergence performance of the NWMR system output variables and strong robustness against uncertainties/disturbances.

关键词： Adaptive sliding mode barrier function nonholonomic wheeled mobile robot(NWMR) trajectory tracking control

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

Recent Advances in Asymmetric Structural Composites for Excellent Electromagnetic Interference Shielding: A Review

引用

Chinese Journal of Polymer Science 2024年第6期42卷 693-710页

作者： Ying Zhou Bai Xue Lan xie Chang-Mei Wu Qiang zheng Department of Polymer Materials and Engineering College of Materials and Metallurgy Guizhou University National Engineering Research Center for Compounding and Modification of Polymer Materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes State Key Laboratory of Public Big Data Guizhou University Department of Polymer Science and Engineering Zhejiang University

Since electromagnetic pollution is detrimental to human health and the environment, numerous efforts have been successively made to achieve excellent electromagnetic interference shielding effectiveness(EMI SE) via designing the hierarchical structures for electromagnetic interference(EMI) shielding polymer composites. Among the plentiful structures, the asymmetric structures are currently a hot spot, principally categorizing into multi-layered, porous, fibrous, and segregated asymmetric structures, which endows the high EMI shielding performance for polymer composites incorporated with magnetic, conductive, and/or dielectric micro/nano-fillers, due to the “absorption-reflection-reabsorption” shielding mechanism. Therefore, this review provides the retrospection and summary of the efforts with respect to abundant asymmetric structures and multifunctional micro/nano-fillers for enhancing EMI shielding properties, which is conducive to the booming development of polymeric EMI shielding materials for the promising prospect in modern electronics and 5-generation(5G) technology.

关键词： Asymmetric structure Microano functional filler Polymer composite Electromagnetic interference shielding

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

供水管网水质化学稳定性分析及水质敏感区识别

引用

中国给水排水 2024年第7期40卷 45-50页

作者：刘志刚徐巧王亚超毛慧周正协何建荣王项荣韦学玉宁波市水务环境集团有限公司浙江宁波315041 安徽工程大学建筑工程学院安徽芜湖241000

针对南方某市多水源供水现状,研究了供水管网水质化学稳定性变化特征,并对该市供水管网水质敏感区进行识别。选取了该市不同水厂供水区域内20个管网采样点2019年3月—2021年3月的余氯、浊度及总铁数据,对不同区域不同季节的管网水质特... 详细信息

针对南方某市多水源供水现状,研究了供水管网水质化学稳定性变化特征,并对该市供水管网水质敏感区进行识别。选取了该市不同水厂供水区域内20个管网采样点2019年3月—2021年3月的余氯、浊度及总铁数据,对不同区域不同季节的管网水质特性进行分析。结果表明,该市供水管网水质整体较好,管网水质敏感区主要集中在供水管网末梢、老旧城区及部分供水分界点,在水源调度过程中需重点关注。管网水质中浊度与余氯具有一定的负相关性,而水体浊度的增加与管道内壁含铁污染物的释放有关。

关键词：供水管网水质化学稳定性水质敏感性余氯

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

A frequency servo SoC with output power stabilization loop technology for miniaturized atomic clocks

引用

Journal of Semiconductors 2024年第6期45卷 13-22页

作者： Hongyang Zhang Xinlin Geng Zonglin Ye Kailei Wang Qian xie zheng Wang School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

A frequency servo system-on-chip(FS-SoC)featuring output power stabilization technology is introduced in this study for high-precision and miniaturized cesium(Cs)atomic clocks.The proposed power stabilization loop(PSL)technique,incorporating an off-chip power detector(PD),ensures that the output power of the FS-SoC remains stable,mitigating the impact of power fluctuations on the atomic clock's stability.Additionally,a one-pulse-per-second(1PPS)is employed to syn-chronize the clock with GPS.Fabricated using 65 nm CMOS technology,the measured phase noise of the FS-SoC stands at-69.5 dBc/Hz@100 Hz offset and-83.9 dBc/Hz@1 kHz offset,accompanied by a power dissipation of 19.7 mW.The Cs atomic clock employing the proposed FS-SoC and PSL obtains an Allan deviation of 1.7×10^(-11) with 1-s averaging time.

关键词： CMOS technology atomic clock phase-locked loop output power stabilization 1PPS

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

不同负荷下焚烧炉-余热锅炉内垃圾燃烧特性数值模拟

引用

工业加热 2024年第5期53卷 46-51页

作者：崔二光解铮陈国喜徐楠胡源刘军河南省锅炉压力容器检验技术科学研究院河南南郑州450016 华北水利水电大学能源与动力工程学院河南郑州450045

为揭示负荷波动对垃圾焚烧电厂垃圾焚烧炉-余热锅炉内垃圾燃烧过程的影响规律,针对某市日处理量700 t/d的垃圾焚烧余热锅炉,采用Fluent和FLIC耦合的方法,研究了不同负荷下炉内垃圾燃烧特性,分别计算了不同负荷下炉内温度场以及各气体的... 详细信息

为揭示负荷波动对垃圾焚烧电厂垃圾焚烧炉-余热锅炉内垃圾燃烧过程的影响规律,针对某市日处理量700 t/d的垃圾焚烧余热锅炉,采用Fluent和FLIC耦合的方法,研究了不同负荷下炉内垃圾燃烧特性,分别计算了不同负荷下炉内温度场以及各气体的质量分数分布。结果表明:随着负荷的增大,余热锅炉出口平均温度从939.49 K升高到1 039.99 K,出口氧气质量分数从10.03%下降到6.19%,出口二氧化碳质量分数从10.34%升高到13.91%。当垃圾焚烧炉在低负荷条件下运行时,炉膛内部温度相较于高负荷较低,可能会造成污染物排放超标等问题;在高负荷条件下运行时,炉排燃烧段向后推迟,火焰靠近右侧水冷壁,炉膛左右水冷壁之间热偏差较大。

关键词：负荷垃圾焚烧燃烧特性数值模拟

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

Clinical epidemiology and disease burden of bronchiolitis in hospitalized children in China:a national cross-sectional study

引用

World Journal of Pediatrics 2023年第9期19卷 851-863页

作者： Jiao Tian Xin‑Yu Wang Lin‑Lin Zhang Meng‑Jia Liu Jun‑Hong Ai Guo‑Shuang Feng Yue‑Ping Zeng Ran Wang zheng‑De xie Beijing Key Laboratory of Pediatric Respiratory Infectious Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesResearch Unit of Critical Infection in ChildrenChinese Academy of Medical Sciences2019RU016Laboratory of Infection and VirologyBeijing Pediatric Research InstituteBeijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthNan Li Shi Lu 56#Beijing 100045China Big Data Center Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina Medical Record Management Ofce Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina

Background Bronchiolitis is a common acute lower respiratory tract infection(ALRTI)and the most frequent cause of hospitalization of infants and young children with ALRTI.Respiratory syncytial virus is the main pathogen that leads to severe bronchiolitis.The disease burden is relatively high.To date,few descriptions of the clinical epidemiology and disease burden of children hospitalized for bronchiolitis are available.This study reports the general clinical epidemiological characteristics and disease burden of bronchiolitis in hospitalized children in China.Methods This study included the face sheet of discharge medical records collected from 27 tertiary children’s hospitals from January 2016 to December 2020 that were aggregated into the FUTang Update medical REcords(FUTURE)database.The sociodemographic variables,length of stay(LOS)and disease burden of children with bronchiolitis were analyzed and compared using appropriate statistical tests.Results In total,42,928 children aged 0–3 years were hospitalized due to bronchiolitis from January 2016 to December 2020,accounting for 1.5%of the total number of hospitalized children of the same age in the database during the period and 5.31%of the hospitalizations for ALRTI.The male to female ratio was 2.01:1.Meanwhile,more boys than girls were observed in different regions,age groups,years,and residences.The 1–2 year age group had the greatest number of hospitalizations for bronchiolitis,while the 29 days–6 months group had the largest proportion of the total inpatients and inpatients with ALRTI in the same age group.In terms of region,the hospitalization rate of bronchiolitis was the highest in East China.Overall,the number of hospitalizations from 2017 to 2020 showed a decreasing trend from that in 2016.Seasonally,the peak hospitalizations for bronchiolitis occurred in winter.Hospitalization rates in North China in autumn and winter were higher than those in South China,while hospitalization rates in South China were higher in spring and summer.Approximately,half of

关键词： Bronchiolitis Children Clinical epidemiology Disease burden Respiratory syncytial virus

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

绝经后骨质疏松患者药物干预依从性影响因素分析

引用

智慧健康 2024年第5期10卷 122-125,129页

作者：谢峥莫丽亚崔妍吴永华杨云龙苏州市立医院老年医学科江苏苏州215005

目的分析绝经后骨质疏松患者药物干预依从性影响因素。方法选取2018年1月—2020年6月在本院治疗的绝经后骨质疏松患者220例为研究对象,给予患者抗骨质疏松药物治疗,并对其用药后1年、2年、3年进行随访,了解患者用药情况,询问并统计自... 详细信息

目的分析绝经后骨质疏松患者药物干预依从性影响因素。方法选取2018年1月—2020年6月在本院治疗的绝经后骨质疏松患者220例为研究对象,给予患者抗骨质疏松药物治疗,并对其用药后1年、2年、3年进行随访,了解患者用药情况,询问并统计自行停药患者的停药原因,分析其药物干预依从性的影响因素。结果患者在2年停药率高于1年、3年(P<0.05);小学及以下教育程度、无骨质疏松家族史、无其他骨质疏松药物史、有合并基础疾病、既往无因骨质疏松住院是影响患者药物干预依从性的主要危险因素。结论绝经后骨质疏松患者药物干预依从性较差,其主要受到教育程度、家族史及合并基础疾病等情况影响,在干预中可加强对患者健康宣教,提升患者对自身疾病和药物治疗的认知,加强对患者用药的管理,对于不同的停药患者采取有针对性的干预措施,进而提升患者用药的依从性。

关键词：绝经后骨质疏松药物干预依从性影响因素

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

海派骆氏妇科产后祛瘀生新方在治疗气虚血瘀型产后恶露不绝中的应用

引用

内蒙古中医药 2024年第1期43卷 58-60页

作者：张甜甜徐慧婷骆春谢正华上海市松江区方塔中医医院妇科上海201600

上海松江骆氏中医妇科为海派中医妇科流派之一,骆春为骆氏妇科第八代传人,上海市中医临床重点学科带头人,全国五一劳动奖章获得者,享受国务院政府特殊津贴。本文总结骆氏妇科第八代传人骆春治疗“产后恶露不绝”的临床经验。根据产后“... 详细信息

上海松江骆氏中医妇科为海派中医妇科流派之一,骆春为骆氏妇科第八代传人,上海市中医临床重点学科带头人,全国五一劳动奖章获得者,享受国务院政府特殊津贴。本文总结骆氏妇科第八代传人骆春治疗“产后恶露不绝”的临床经验。根据产后“多虚多瘀”的病因病机特点,骆春自拟了以补气化瘀止血为治疗大法的“产后祛瘀生新方”治疗本病,以达到补气化瘀止血之效,疗效显著,降低了产妇再次手术之苦。

关键词：骆氏妇科产后恶露不绝活血化瘀三七

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

Role of CD36 in central nervous system diseases

引用

Neural Regeneration Research 2024年第3期19卷 512-518页

作者： Min Feng Qiang Zhou Huimin xie Chang Liu Mengru zheng Shuyu Zhang Songlin Zhou Jian Zhao School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina Department of Orthopedic Oncology Second Affiliated Hospital of Naval Medical UniversityShanghaiChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education NMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsJiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury RepairCo-Innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina Department of Stomatology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Medical College of Nantong University NantongJiangsu ProvinceChina

CD36 is a highly glycosylated integral membrane protein that belongs to the scavenger receptor class B family and regulates the pathological progress of metabolic diseases.CD36 was recently found to be widely expressed in various cell types in the nervous system,including endothelial cells,pericytes,astrocytes,and microglia.CD36 mediates a number of regulatory processes,such as endothelial dysfunction,oxidative stress,mitochondrial dysfunction,and inflammatory responses,which are involved in many central nervous system diseases,such as stroke,Alzheimer’s disease,Parkinson’s disease,and spinal cord injury.CD36 antagonists can suppress CD36 expression or prevent CD36 binding to its ligand,thereby achieving inhibition of CD36-mediated pathways or functions.Here,we reviewed the mechanisms of action of CD36 antagonists,such as Salvianolic acid B,tanshinone IIA,curcumin,sulfosuccinimidyl oleate,antioxidants,and small-molecule compounds.Moreover,we predicted the structures of binding sites between CD36 and antagonists.These sites can provide targets for more efficient and safer CD36 antagonists for the treatment of central nervous system diseases.

关键词： animal experiments antagonists CD36 antagonist central nervous system diseases clinical trial curcumin microRNA salvianolic acid B small-molecule drugs sulfosuccinimidyl oleate

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

Deep Industrial Image Anomaly Detection: A Survey

引用

Machine Intelligence Research 2024年第1期21卷 104-135页

作者： Jiaqi Liu Guoyang xie Jinbao Wang Shangnian Li Chengjie Wang Feng zheng Yaochu Jin Research Institute of Trustworthy Autonomous Systems Southern University of Science and TechnologyShenzhen 518055China NICEGroup Universityof SurreyGuildford GU27YXUK Youtu Lab TencentShanghai 200233China NICE Group Bielefeld UniversityBielefeld 33619Germany

The recent rapid development of deep learning has laid a milestone in industrial image anomaly detection(IAD).In this pa-per,we provide a comprehensive review of deep learning-based image anomaly detection techniques,from the perspectives of neural net-work architectures,levels of supervision,loss functions,metrics and datasets.In addition,we extract the promising setting from indus-trial manufacturing and review the current IAD approaches under our proposed setting.Moreover,we highlight several opening chal-lenges for image anomaly detection.The merits and downsides of representative network architectures under varying supervision are discussed.Finally,we summarize the research findings and point out future research directions.More resources are available at https://***/M-3LAB/awesome-industrial-anomaly-detection.

关键词： Image anomaly detection defect detection industrial manufacturing deep learning computer vision

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

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：