检索结果-南通市图书馆

心火脾虚证型特应性皮炎患者汗液差异代谢物及相关通路分析

在线全文

学校读者我要写书评

暂无评论

中国皮肤性病学杂志 2024年第9期38卷 975-981页

作者：王家爵谢凌峰莫秀梅李红毅广州中医药大学第二临床医学院广东广州510405 广州中医药大学第二临床医学院省部共建中医湿证国家重点实验室广东广州510120 广东省中医院皮肤科广东广州510120 广东省中医皮肤病研究所广东广州510120

目的探究心火脾虚证型特应性皮炎(AD)患者汗液差异代谢物与相关通路。方法招募心火脾虚证型特应性皮炎患者与健康志愿者各22例。对所收集的汗液标本进行广泛靶向代谢组学检测,通过多元统计分析筛选出差异代谢物。利用京都基因与基因组... 详细信息

目的探究心火脾虚证型特应性皮炎(AD)患者汗液差异代谢物与相关通路。方法招募心火脾虚证型特应性皮炎患者与健康志愿者各22例。对所收集的汗液标本进行广泛靶向代谢组学检测,通过多元统计分析筛选出差异代谢物。利用京都基因与基因组百科全书(KEGG)数据库、人类代谢组数据库(HMDB)对差异代谢物进行相关通路与关联疾病分析。结果在两组汗液标本间,共筛选出115个差异代谢物。经KEGG数据库注释分析,共涉及15个通路。HMDB关联疾病分析结果提示与消化系统疾病关系密切,包括结直肠癌、嗜酸性食管炎、克罗恩病和溃疡性结肠炎。结论心火脾虚证型特应性皮炎患者与健康对照组间存在众多差异代谢物,可为共病临床早期预警提供线索。

关键词：特应性皮炎汗液代谢组学心火脾虚

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

莺歌海盆地莺北区渐新统资源潜力与勘探方向

中国海上油气 2024年第2期36卷 25-36页

作者：武爱俊徐建永杨海长李宏义肖伶俐李欣沈娇王柯中海油研究总院有限责任公司北京100028

莺歌海盆地莺北区中新统烃源岩资源潜力有限,制约了油气勘探。利用地质、地球物理和地球化学等资料,开展了莺北区渐新统三角洲识别与含煤性分析、资源潜力评价和不同构造单元成藏条件比较等工作,明确了莺北区渐新统资源潜力和有利勘探... 详细信息

莺歌海盆地莺北区中新统烃源岩资源潜力有限,制约了油气勘探。利用地质、地球物理和地球化学等资料,开展了莺北区渐新统三角洲识别与含煤性分析、资源潜力评价和不同构造单元成藏条件比较等工作,明确了莺北区渐新统资源潜力和有利勘探方向。研究表明:①莺北区渐新世具备发育大型(扇)三角洲的物质基础和构造条件,崖城组—陵水组继承性发育大型煤系三角洲,形成崖城组三角洲平原煤系和陵水组陆源海相泥岩2类烃源岩;②莺北区渐新统煤系三角洲是莺北区主力烃源岩,主要处于高成熟—过成熟度大规模生气阶段,天然气资源量达1.13万亿方;③莺北区凹陷带、东部斜坡带中组合是有利勘探方向,构造脊、鼻状构造等具有良好汇聚背景上的大型岩性、地层圈闭是发现大中型气田的重要领域。本项研究成果指导了莺北区的勘探突破。

关键词：莺歌海盆地莺北区渐新统煤系三角洲资源潜力勘探方向

在线全文

学校读者我要写书评

暂无评论

几类扩大设计的均匀性模式

河南师范大学学报（自然科学版） 2024年第1期52卷 67-73页

作者：田杰中张诗娴柏启明李洪毅吉首大学数学与统计学院湖南吉首416000

大型空间填充设计在计算机试验中有着广泛的应用,其直接构造具有一定的难度,现有的研究中常常利用倍扩方法通过较小规模的空间填充设计构造大型的空间填充设计.基于可卷型L_(2)-偏差,定义了混水平设计的均匀性模式,建立了均匀性模式与... 详细信息

大型空间填充设计在计算机试验中有着广泛的应用,其直接构造具有一定的难度,现有的研究中常常利用倍扩方法通过较小规模的空间填充设计构造大型的空间填充设计.基于可卷型L_(2)-偏差,定义了混水平设计的均匀性模式,建立了均匀性模式与字长型模式之间的关系,并给出了利用倍扩方法得到的几类扩大设计的均匀性模式和初始设计的字长型模式之间的解析联系.最后通过数值例子验证了所获得的理论结果.

关键词：均匀性模式可卷型L2-偏差扩大设计字长型模式

Adaptive Fixed-Time Control of Nonlinear MASs With Actuator Faults

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1252-1262页

作者： Hongru Ren Hui Ma hongyi li Zhenyou Wang the School of Automation and Guangdong Province Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of TechnologyGuangzhou 510006China the School of Mathematics and Statistics Guangdong University of TechnologyGuangzhou 510006China

The adaptive fixed-time consensus problem for a class of nonlinear multi-agent systems(MASs)with actuator faults is considered in this *** approximate the unknown nonlinear functions in MASs,radial basis function neural networks are *** addition,the first order sliding mode differentiator is utilized to solve the“explosion of complexity”problem,and a filter error compensation method is proposed to ensure the convergence of filter error in fixed *** the help of the Nussbaum function,the actuator failure compensation mechanism is *** designing the adaptive fixed-time controller,all signals in MASs are bounded,and the consensus errors between the leader and all followers converge to a small area of ***,the effectiveness of the proposed control method is verified by simulation examples.

关键词： Actuator faults adaptive fixed-time control multiagent systems(MASs) Nussbaum function

Observer-based adaptive consensus control for nonlinear multi-agent systems with time-delay

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第3期63卷 195-211页

作者： Wenbin XIAO liang CAO hongyi li Renquan LU School of Automation and Guangdong Province Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of Technology

In this paper, we consider the observer-based adaptive consensus tracking problem for a class of nonlinear time-delay multi-agent systems in the presence of input saturation. Under the assumption that the communication topology is directed and connected, a distributed adaptive consensus controller is developed based on the dynamic surface control technique. By constructing the nonlinear observer, the unmeasurable agents dynamics can be estimated. Input saturation problem is solved by a smooth function combined with an auxiliary variable. With the help of prescribed performance functions, the synchronization errors converge to the prescribed sets, which are characterized as a neighborhood of zero. According to Lyapunov stability theory, it is shown that with the proposed distributed consensus tracking approach, the consensus errors are cooperatively semi-globally uniformly ultimately bounded. Finally, a simulation example is provided to show the effectiveness of the proposed algorithm.

关键词： adaptive consensus control multi-agent systems prescribed performance time-delay unmeasurable states

Adaptive event-triggered control for a class of nonlinear systems with periodic disturbances

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第5期63卷 161-175页

作者： Hui MA hongyi li Renquan LU Tingwen HUANG School of Automation and Guangdong Province Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of Technology Science Program Texas A&M University at Qatar

This paper investigates the adaptive event-triggered control problem for a class of nonlinear systems subject to periodic disturbances. To reduce the communication burden, a reliable relative threshold strategy is proposed. Fourier series expansion and radial basis function neural network are combined into a function approximator to model suitable time-varying disturbed function of known periods in strict-feedback systems. By combining the Lyapunov stability theory and the backstepping technique, the proposed adaptive control approach ensures that all the signals in the closed-loop system are bounded, and the tracking error can be regulated to a compact set around zero in finite time. Finally, simulation results are presented to verify the effectiveness of the theoretical results.

关键词： nonlinear systems event-triggered control periodic disturbances Fourier series expansion finite time

An Overview of Finite/Fixed-Time Control and Its Application in Engineering Systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2022年第12期9卷 2106-2120页

作者： Yang liu hongyi li Zongyu Zuo Xiaodi li Renquan Lu IEEE College of Automation and Electronics Engineering Qingdao University of Science and TechnologyQingdao 266061 School of Automation Guangdong University of TechnologyGuangzhou 510006China School of Automation Guangdong University of Technologyand also with the Guangdong Province Key Laboratory of Intelligent Decision and Cooperative ControlGuangzhou 510006China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100083China School of Mathematics and Statistics Shandong Normal UniversityBeijing 100083China Center for Control and Engineering Computation Shandong Normal UniversityJinan 250014China

The finite/fixed-time stabilization and tracking control is currently a hot field in various systems since the faster convergence can be obtained. By contrast to the asymptotic stability,the finite-time stability possesses the better control performance and disturbance rejection property. Different from the finite-time stability, the fixed-time stability has a faster convergence speed and the upper bound of the settling time can be estimated. Moreover, the convergent time does not rely on the initial *** work aims at presenting an overview of the finite/fixed-time stabilization and tracking control and its applications in engineering systems. Firstly, several fundamental definitions on the finite/fixed-time stability are recalled. Then, the research results on the finite/fixed-time stabilization and tracking control are reviewed in detail and categorized via diverse input signal structures and engineering applications. Finally, some challenging problems needed to be solved are presented.

关键词： Adding a power integrator finite/fixed-time control and application homogeneous theory sliding mode control

Circuit model based design and analysis for a four-structure-switchable wireless power transfer system

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2015年第3期58卷 534-544页

作者： FANG Xuelin liU Hao li GuiYang SHAO Qi li hongyi State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences University of Chinese Academy of Sciences

The four-coil wireless power transfer(WPT)technology can effectively improve the transfer *** high efficiency,however,cannot be obtained along the whole transfer distance due to the phenomenon of frequency splitting in the over coupled *** at this limitation,this paper presents a switchable WPT system to improve the overall efficiency by changing the number of working *** switching conditions for the designed system are determined based on the analysis of the transfer efficiencies of four structures,which is deduced through modeling the equivalent *** simulation results well comply with the experimental results and both of them indicate that the switchable system can greatly improve the overall transfer efficiency along the whole transfer *** overall efficiency of the experimental system can reach above 70%at9.97 MHz without additional complexity,which is higher than any single structure system.

关键词： magnetic resonance coupling efficiency analysis structures switched wireless power transfer

基于文本分析的飞机牵引车作业不安全事件研究

在线全文

学校读者我要写书评

暂无评论

汽车实用技术 2024年第15期49卷 159-165页

作者：杜红兵李弘毅中国民航大学安全科学与工程学院天津300300

为了研究飞机牵引车作业过程的安全性,文章对1989年至2023年间自愿报告系统(ASRS)中12537条涉及飞机牵引车作业不安全事件的叙述和简述部分进行了文本挖掘和文本分析,并结合SHELL模型识别了飞机牵引车作业关键要素,最后采用SHEL-Jaccar... 详细信息

为了研究飞机牵引车作业过程的安全性,文章对1989年至2023年间自愿报告系统(ASRS)中12537条涉及飞机牵引车作业不安全事件的叙述和简述部分进行了文本挖掘和文本分析,并结合SHELL模型识别了飞机牵引车作业关键要素,最后采用SHEL-Jaccard系数矩阵对关键要素之间的关系进行分析,提出飞机牵引车作业安全预防和控制措施。研究发现,飞机牵引车作业关键要素如下:以销、刹车、速度控制装置、连接装置、通讯设备为主的硬件要素;以牵引车检查单、机场地面引导线、机场管理为主的软件要素;以牵引车司机、引导、警戒和机组为主的主要人员和以能见度、地面状况、障碍物为主的环境要素。

关键词：飞机牵引车不安全事件 ASRS KH Coder 文本分析 SHELL模型