检索结果-内蒙古大学图书馆

Structural reduction of CRNs with linear sub-CRNs

IFAC-PapersOnLine 2021年第14期54卷 149-154页

作者： Katalin M. Hangos György Lipták Gábor Szederkényi Systems and Control Laboratory Computer and Automation Research Institute P.O. Box 63 H-1518 Budapest Hungary Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Faculty of Information Technology and Bionics Péter Pázmány Catholic University Budapest Hungary

A novel systems theory-based structural reduction method is proposed in this paper that can be applied to chemical reaction networks (CRNs) including subsystems consisting of linear reactions, i.e. a linear sub-CRN. The reduced model is a delayed CRN with distributed delays having less complexes (monomials) and reactions than the original model. The reduction is based on the fact that the input/output response of a linear sub-CNR can be seen as a time-delayed input to output relationship, therefore linear sub-CNRs can be interpreted as reactions with distributed delay from their input to their output complexes. The practically important example of a kinetic model describing the spread of the COVID-19 epidemic is used as a case study to illustrate the basic concepts and the computation method.

关键词： Delay Model reduction Chemical Reaction Networks COVID

来源：评论

学校读者我要写书评

暂无评论

Event-Triggered Sliding Mode control Strategies for Positioning Systems: An Experimental Assessment

Event-Triggered Sliding Mode Control Strategies for Position...

引用

International Workshop on Advanced Motion control (AMC)

作者： Andrej Sarjaš Martin Steinberger Dušan Gleich Martin Horn Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia Graz University of Technology Institute of Automation and Control Graz Austria

ISBN: (数字)9781728131894

ISBN: (纸本)9781728131900

The paper presents experimental assessments of different event-triggered sliding mode control strategies. The main purpose of the event-triggered control approach is to reduce the system utilization and relax the scheduling of the tasks on real-time systems. Event triggering is a real-time implementation technique, where the execution of the controller is not fixed to a preselected sampling time. The stability and performance of the controlled system need to be preserved with regard to the sporadic nature of the controller update. Sliding mode controllers are employed in the context of event-triggering to achieve robustness with respect to matched perturbations. Three different sliding mode event-triggered strategies are evaluated on the real-time positioning system. All the obtained experimental results are compared to a time-triggered version. The results confirm that event-triggering sliding mode control is well suited and reduce the system use drastically.

关键词： Tracking Computational modeling Real-time systems Stability analysis Robustness Task analysis Sliding mode control

来源：评论

学校读者我要写书评

暂无评论

Distributed localization in wireless sensor networks under denial-of-service attacks

arXiv

引用

arXiv 2020年

作者： Shi, Lei Liu, Qingchen Shao, Jinliang Cheng, Yuhua School of Automation Engineering University of Electronic Science and Technology of China Sichuan611731 China Chair of Information-Oriented Control Technical University of Munich Munich80869 Germany

—In this paper, we study the problem of localizing the sensors’ positions in presence of denial-of-service (DoS) attacks. We consider a general attack model, in which the attacker action is only constrained through the frequency and duration of DoS attacks. We propose a distributed iterative localization algorithm with an abandonment strategy based on the barycentric coordinate of a sensor with respect to its neighbors, which is computed through relative distance measurements. In particular, if a sensor’s communication links for receiving its neighbors’ information lose packets due to DoS attacks, then the sensor abandons the location estimation. When the attacker launches DoS attacks, the AS-DILOC algorithm is proved theoretically to be able to accurately locate the sensors regardless of the attack strategy at each time. The effectiveness of the proposed algorithm is demonstrated through simulation examples. Copyright © 2020, The Authors. All rights reserved.

关键词： Denial-of-service attack

来源：评论

学校读者我要写书评

暂无评论

The Energy Efficiency of a Prosumer in a Photovoltaic System

The Energy Efficiency of a Prosumer in a Photovoltaic System

引用

International Symposium for Design and Technology of Electronics Packages (SIITME)

作者： Marius-Alexandru Dobrea Stefan Bichiu Ioana Opris Mihaela Vasluianu Faculty of Automatic Control and Computer Science UPB Bucharest Romania Faculty of Power Engineering UPB Bucharest Romania Collective of Automation and Applied Informatics Faculty of Hidrotehnics UTCB Bucharest Romania

ISBN: (数字)9781728175065

ISBN: (纸本)9781728175072

This article aims to calculate the net income achieved by a prosumer for an existing On-Grid system of photovoltaic panels consisting of a set of 12 poly crystalline panels with a nominal power of 250 Wand 60 cells and an On-Grid inverter (StecaGrid model) with a maximum power of 3000 W. The prosumer is located in southern Romania, Ilfov County. Modeling of the photovoltaic panel in Matlab / SIMULINK was performed using a mathematical model, and it was compared with a real data set. Next, an analysis was made of the energy produced by the photovoltaic system, and the energy consumed by the prosumer, the excess energy being introduced in the national energy system. We have achieved a net income saving for March, so the analyzed photovoltaic system has energy efficiency that can significantly reduce electricity costs over time. Thus, using the Matlab / Simulink model, photovoltaic systems can be designed to satisfy the needs of prosumers.

关键词： Photovoltaic systems Mathematical model Solar power generation Software packages Inverters Temperature Temperature measurement

来源：评论

学校读者我要写书评

暂无评论

Collaborative Scheduling of Computing Tasks for Edge Computing

Collaborative Scheduling of Computing Tasks for Edge Computi...

引用

Chinese automation Congress (CAC)

作者： Yue Liu Gang Xiong Fenghua Zhu Shichao Chen Liguo Zhang Xudong Liu School of Artificial Intelligence and Automation Beijing University of Technology The State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation and the Cloud Computing Center Chinese Academy of Sciences Beijng China The State Key Laboratory for Management and Control of Complex Systems Institute of Automation and Qingdao Academy of Intelligent Industries Chinese Academy of Sciences Beijng China Faculty of Information and Technology Beijing University of Technology Beijing China

ISBN: (纸本)9781665426480

In the face of the rapid development of the IoT, the traditional cloud computing, while providing services for mobile intelligent devices, also brings problems such as network bandwidth occupation and communication delay. Edge computing can solve these problems to some extent. But too many offloaded tasks may result in an edge server becoming overloaded and execution delay of tasks increasing, the computing resources of idle edge devices are also not fully utilized. In order to make full use of the computing resources of idle edge devices in the local network and reduce the execution delay for computing tasks, this paper takes the average delay time for all end devices as the optimization objective and proposes an end-edge cooperative scheduling (EECS) model to schedule tasks for edge computing. The scheduling algorithm used in EECS model is improved based on MCT algorithm. We use the EdgeCloudSim to verily the EECS model and scheduling algorithm. The simulation results show that the average completion time of computing tasks in EECS model, compared with only single edge server (SEE) task computing model, can be reduced by up to three times. In addition, the system load can be balanced to a certain extent in local network.

关键词： Analytical models Scheduling algorithms Computational modeling Collaboration Scheduling Delays Servers

来源：评论

学校读者我要写书评

暂无评论

Strong detectability and unknown input observer design for a class of networks of systems

引用

IFAC-PapersOnLine 2018年第23期51卷 46-51页

作者： Schaum, A. Chair of Automatic Control Faculty of Engineering Kiel University Kiel24143 Germany

Detectability is the key property which underlies the design of any convergent observer. In this paper a method for analyzing the detectability for a class of networks of systems with unknown inputs is presented, exploiting the definition of indistinguishable trajectories and the structure of the underlying network graph. This analysis yields sufficient conditions for the sensor location in order to ensure the system's strong detectability in presence of unknown inputs. Based on this analysis a simple (reduced order) unknown-input observer with explicit convergence conditions in terms of system parameters and the sensor locations is proposed and tested in numerical simulations for an illustrative case example of a Markov-chain based epidemic spreading model in a scale-free network with N = 103 nodes. © 2018

关键词： Location Markov processes Convergence conditions Detectability Epidemic spreading Observer design Sensor location Underlying networks Unknown input observer Unknown inputs

来源：评论

学校读者我要写书评

暂无评论

Design and Experiment of a Magnetic Shape Memory Alloy Actuator

Design and Experiment of a Magnetic Shape Memory Alloy Actua...

引用

Science and Technology Innovation (IAECST), International Academic Exchange Conference on

作者： Yulu Zeng Zhifang Zhu Jiaxin Wan Ran Zhao Senlin Huang Jiangxi Province Key Laboratory of Precision Drive & Control Nanchang Institute of Technology Nanchang China Nanchang Institute of Technology Jiangxi Province Key Laboratory of Precision Drive & Control Zhejiang Sci-Tech University Faculty of Mechanical Engineering and Automation Nanchang China Zhongyuan-Petersburg Aviation College Zhongyuan University of Technology Zhengzhou China

ISBN: (纸本)9781665402682

This paper presented a large displacement precision actuator based on magnetic shape memory alloy (MSMA). A Ni-Mn-Ga rod was chosen as the driving source for the proposed actuator. The structure of the actuator was designed, and the its parameters are determined by calculation. The magnetic field is simulated by the finite element simulation software. After determining that the magnetic field meets the requirements, the prototype is made for experiments. The experimental results show that the maximum output displacement of the magnetic shape memory alloy actuator reaches 1.07mm when the pre-stress is 0 MPa. Which indicates that the design of the device is reasonable and is of great significance for broadening the application field of micro-displacement actuators.

关键词： Actuators Magnetic flux density Magnetic field measurement Shape memory alloys Current measurement Prototypes Software

来源：评论

学校读者我要写书评

暂无评论

Tailoring spontaneous infrared emission of HgTe quantum dots with laser-printed plasmonic arrays

引用

Light(Science & Applications) 2020年第1期9卷 1870-1879页

作者： A.A.Sergeev D.V.Pavlov A.A.Kuchmizhak M.V.Lapine W.K.Yiu Y.Dong N.Ke S.Juodkazis N.Zhao S.V.Kershaw A.L.Rogach Institute of Automation and Control Processes Far Eastern BranchRussian Academy of SciencesVladivostok 690041Russia Far Eastern Federal University Vladivostok 690090Russia University of Technology Sydney NSW 2007 SydneyAustralia Department of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongKowloonHong Kong SARChina Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Material Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Electronic Engineering The Chinese University of Hong KongShatinNew TerritoriesHong Kong SARChina Swinburne University of Technology John St.HawthornVIC 3122Australia Melbourne Centre for Nanofabrication ANFF151 Wellington RoadClaytonVIC 3168Australia

Chemically synthesized near-infrared to mid-infrared(IR)colloidal quantum dots(QDs)offer a promising platform for the realization of devices including emitters,detectors,security,and sensor ***,at longer wavelengths,the quantum yield of such QDs decreases as the radiative emission rate drops following Fermi’s golden rule,while non-radiative recombination channels compete with light *** over the radiative and non-radiative channels of the IR-emitting QDs is crucially important to improve the performance of IR-range ***,we demonstrate strong enhancement of the spontaneous emission rate of near-to mid-IR HgTe QDs coupled to periodically arranged plasmonic nanoantennas,in the form of nanobumps,produced on the surface of glasssupported Au films via ablation-free direct femtosecond laser *** enhancement is achieved by simultaneous radiative coupling of the emission that spectrally matches the first-order lattice resonance of the arrays,as well as more efficient photoluminescence excitation provided by coupling of the pump radiation to the local surface plasmon resonances of the isolated ***,coupling of the HgTe QDs to the lattice plasmons reduces the influence of non-radiative decay losses mediated by the formation of polarons formed between QD surface-trapped carriers and the IR absorption bands of dodecanethiol used as a ligand on the QDs,allowing us to improve the shape of the emission spectrum through a reduction in the spectral dip related to this ligand *** the ease of the chemical synthesis and processing of the HgTe QDs combined with the scalability of the direct laser fabrication of nanoantennas with tailored plasmonic responses,our results provide an important step towards the design of IR-range devices for various applications.

关键词： quantum radiative coupling

来源：评论

学校读者我要写书评

暂无评论

Task-space fixed-time bipartite tracking control for heterogeneous networked Euler-Lagrange systems

引用

Applied Mathematical Modelling 2025年 148卷

作者： Runlong Peng Jinchen Ji Lixia Liu Zhonghua Miao Nan Li Jin Zhou Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering Science Shanghai University Shanghai 200072 PR China School of Faculty of Engineering and IT University of Technology Sydney 2007 Australia Department of Mathematics and Artificial Intelligence Qilu University of Technology Jinan 250353 PR China School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 PR China Shanghai Institute of Aircraft Mechanics and Control Shanghai 200092 PR China

This paper investigates the bipartite coordinated tracking control problem in the task-space of heterogeneous networked Euler-Lagrange systems in the fixed-time framework. A new neural network-based fixed-time hierarchical control approach is developed mainly under the directed graphs. Specifically, a distributed observer is firstly designed to estimate the desired position and velocity of the system in the fixed-time framework, and the neural network-based controller is proposed on this basis. The effect of system uncertainty is effectively mitigated and the chattering phenomenon is overcome, thus solving the bipartite coordinated tracking control problem of heterogeneous networked Euler-Lagrange systems at the control layer. In addition, the error can be kept within a small convergence region as derived by the fixed-time stability theory. Finally, the feasibility of the proposed control scheme is fully verified by numerical simulation.

关键词： Bipartite coordinated tracking control Fixed-time hierarchical control Heterogeneous networked Euler-Lagrange systems Neural network

来源：评论

学校读者我要写书评

暂无评论

Dissipativity-based output-feedback control for a class of semilinear unstable heat equations

引用

IFAC-PapersOnLine 2019年第16期52卷 316-321页

作者： A. Schaum T. Meurer Chair of Automatic Control Faculty of Engineering Kiel University 24143 Kiel Germany

The problem of output-feedback control for a class of semilinear unstable heat equations is addressed within the framework of dissipativity theory. It is shown that using a simple proportional output-feedback control in a collocated input-output pairing the closed-loop stability is ensured if the control gain is chosen sufficiently large and the nonlinearity satisfies a quadratic dissipativity condition. The approach is illustrated using numerical simulations.

关键词： Semilinear heat equation output-feedback control dissipativity

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：