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A new storage design of distributed geographic information

2012 2nd International Conference on Materials science and Information Technology, MSIT 2012

作者： Liu, Yanli Yu, Yan Du, Xiaochu School of Science Wuhan University of Science and Technology Wuhan Hubei China Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan Hubei China School of Resources and Environmental Science Hubei University Wuhan Hubei China

ISBN: (纸本)9783037854389

In order to solve the storage problem of mass graphic data in web, an improved hierarchy of graphic objects is used in this paper. By building up layer object, the system can manage the data for different levels of abstraction. It is different from Object-Oriented Data Base (OODB) which used a relational table as an object to manage data. Uniform operations for the same terrain are offered. Using Object-based Storage Device (OSD) is advantaged at data transmission. The method of storing layer object in OSD is given in the paper. Empirical results show that the mechanism is well-suited to fetch detail data in web. © (2012) Trans Tech Publications, Switzerland.

关键词： Virtual storage

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H∞ Synchronization and Sensitivity Analysis of High-Order Complex Dynamical Networks 4

H∞ Synchronization and Sensitivity Analysis of High-Order C...

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4th International Conference on Electronic Information Engineering and Computer Communication, EIECC 2024

作者： Ni, Anling Hu, Jia Tu, Lilan Wuhan University of Science and Technology Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan China Wuhan University of Science and Technology College of Science Wuhan China

ISBN: (纸本)9798331534622

In complex dynamical networks, interactions among nodes not only represent binary relationships but also multivariate relationships. This paper investigates H∞ synchronization of high-order complex dynamical networks with second-order interactions, which are characterized by 2-simplex. Based on Lyapunov stability theory, linear matrix inequality (LMI), and H∞ control theory, this paper proposes sufficient conditions to achieve asymptotic H∞ synchronization by adding controllers to high-order complex dynamical networks. Numerical simulations validate the feasibility and effectiveness of the proposed theoretical results. © 2024 IEEE.

关键词： Synchronization

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Iterative learning heterogeneous trajectory tracking for partially interdependent networks

Iterative learning heterogeneous trajectory tracking for par...

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作者： Guo, Tianjiao Tu, Lilan Chai, Lang Su, Qingqing Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology Wuhan China College of Science Wuhan University of Science and Technology Wuhan China

Trajectory tracking is a hot topic in the field of complex systems. In this paper, based on the Lyapunov stability theory, combined with the adaptive iterative learning control method, the heterogeneous trajectory tracking of partially interdependent networks is investigated in a given finite time interval. The considered network consists of two subnets, where only the first m nodes are intercoupled. Firstly, some suitable iterative learning controllers, as well as the adaptive laws and the coupling strength learning laws, are designed for each node. Secondly, the boundedness and the convergence of the signals are proved using the proposed control strategy. Finally, some simulations are presented to illustrate the effectiveness and feasibility of the theoretical results presented in this paper. Generally, the accuracy trajectory tracking is found almost proportional to the number of iterations. When the number of iterations is fixed, with the increasing number of nodes having interdependence, the time required to track target accurately is reduced. © 2021 Chinese Automatic Control Society and John Wiley & Sons Australia, Ltd.

关键词： Iterative methods

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Vibration and instability of a fluid-conveying nanotube resting on elastic foundation subjected to a magnetic field 60

Vibration and instability of a fluid-conveying nanotube rest...

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60th International Conference on Vibroengineering

作者： Li, Ming Zhou, Junru Deng, Qian Lv, Liufei College of Science Wuhan University of Science and Technology Wuhan China Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology Wuhan China

Using the nonlocal Euler-Bernouli beam model, this paper is carried out to investigate the vibrations and instability of a single-walled carbon nanotube (SWCNT) conveying fluid subjected to a longitudinal magnetic field. The nanobeam with clamped-clamped boundary conditions lies on the Pasternak foundation. Hamilton's principle is applied to derive the fluid-structure interaction (FSI) governing equation and the corresponding boundary conditions. In the solution part the differential transformation method (DTM) is used to solve the differential equations of motion. The influences of nonlocal parameter, longitudinal magnetic field, Pasternak foundation on the critical divergence velocity of the nanotubes is studied. © 2022 JVE International. All rights reserved.

关键词： Equations of motion

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Calculations of stability of alloyed cementite from valance electron structure

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Journal of Central South University 2017年第2期24卷 259-269页

作者：王红军刘宏玉刘礼曾晓宇卢建夺林冲徐红兵 Department of Physics Wuhan University of Science and Technology Wuhan 430065 China Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan 430065 China School of Remote Sensing and Information Engineering Wuhan University Wuhan 430079 China Department of Physics and Astronomy Clemson University Clemson SC 29634 USA

Based on the empirical electronic theory of solids and molecules （EET）, the actual model for unit cell of cementite （0-FeaC） was built and the valence electron structures （VES） of cementite with specified site and a number of Fe atoms substituted by alloying atoms of M （ M=Cr, V, W, Mo, Mn ） were computed by statistical method. By defining P as the stability factor, the stability of alloyed cementite with different numbers and sites of Fe atoms substituted by M was calculated. Calculation results show that the density of lattice electrons, the symmetry of distribution of covalent electron pairs and bond energy have huge influence on the stability of alloyed cementite. It is more stable as M substitutes for FeE than for Fe1. The alloyed cementite is the most stable when Cr, Mo, W and V substitute for 2 atoms of Fe2 at the sites of Nos. 2 and 3 （or No. 6 and No. 7）. The stability of alloyed cementite decreases gradually as being substitutional doped by W, Cr, V, Mo and Mn.

关键词： valence electron structure alloyed cementite stability density of lattice electrons symmetry of bonds bond energy

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Non-fragile H∞ control for neutral stochastic hybrid systems with time-varying delay

Non-fragile H∞ control for neutral stochastic hybrid system...

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2011 International Conference on Information science and Technology, ICIST 2011

作者： Chen, Guici Yu, Shengchun Li, Shougui Province Key Laboratory of Systems Science in Metallurgical Process College of Science Wuhan University of Science and Technology Wuhan 430081 China

ISBN: (纸本)9781424494408

The robust non-fragile H∞ control problems for neutral stochastic hybrid systems with time-varying delay are studied in this paper. Firstly, a delay-dependent stochastic Markovian jumping bounded real lemma is presented in terms of linear matrix inequalities(LMIs). Secondly, based on the bounded real lemma, for both the case of additive and multiplicative controller uncertainties, delay-dependent sufficient conditions for the solvability of non-fragile H∞ control for nominal neutral stochastic hybrid systems with time-varying delay and neutral stochastic hybrid systems with time-varying delay are derived by taking a Lyapunov-Krasovskii functional and its Itô derivative. The desired state feedback controller can be developed by solving some certain LMIs. At last, a numerical example is given to show the validity of the obtained results and the effectiveness of the proposed method. © 2011 IEEE.

关键词： Linear matrix inequalities

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Robust H∞ control for stochastic system by delay feedback controller

Robust H∞ control for stochastic system by delay feedback c...

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2011 International Conference on Information science and Technology, ICIST 2011

作者： Wang, Zhiming Zhang, Yanliang College of Science Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology Wuhan 430081 China

ISBN: (纸本)9781424494408

The stochastic asymptotic stable and robust H∞ control for stochastic system by delay feedback controls are studied in this paper. The idea of the controller design is different from the traditional state feedback controller design. A Lyapunov-Krasovskii functional is constructed at first, and by linear matrix inequality(LMI) techniques, the delay-dependent sufficient conditions which provide the feasibility of the H∞ controller is given. The numerical example with simulation is given to show the feasibility of the designed controller. © 2011 IEEE.

关键词： Stochastic systems

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Robust Control for Stochastic Interval System with Time Delay Based on Dissipativity Analysis 33

Robust Control for Stochastic Interval System with Time Dela...

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第三十三届中国控制会议

作者： CHEN Guici SHEN Yi School of Hydropower & Information Engineering Huazhong University of Science & Technology Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science & Technology School of Automation Huazhong University of Science & Technology

ISBN: (纸本)9781479947249

In this paper, robust control problems for stochastic delay interval systems(SDISs) based on dissipativity analysis are investigated. The SDISs are equivalently transformed into a kind of stochastic uncertain systems with time-delay rstly. By constructing appropriate Lyapunov-Krasovskii functional, the state-feedback robust controller is designed via solving a linear matrix inequality(LMI). Finally, a numerical example with simulation is given to show the effectiveness and correction of the designed robust controller.

关键词： Stochastic Interval systems,Time Delay,Dissipativity,Robust Control

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Effects of surface roughness on fatigue behavior of additively manufactured stainless steel 316L 8

Effects of surface roughness on fatigue behavior of additive...

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2022 8th International Forum on Manufacturing Technology and Engineering Materials, IFEMMT 2022

作者： Zeng, Guowei Ye, Wanrong Liu, Lei Department of Engineering Mechanics Wuhan University of Science and Technology Wuhan430065 China Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan430081 China

Surface roughness plays an important role which affects the fatigue performance of additively manufactured metal components. Surface roughness generally contains micro-notches which form stress concentration and significantly deteriorate the fatigue life. Based on nonlinear elastoplasticity finite element (FE) analyses, the roughness model of additively manufactured stainless steel 316L (SS316L) was performed, and the cyclic behavior of surface notch root material under different fatigue stress loads was captured. The stress concentration factor on the selected critical surface position is calculated and the notch root strain analysis are proved by depending on the applied load level. Finally two distinct deformation modes are found: elastic shakedown and ratcheting deformation. © Published under licence by IOP Publishing Ltd.

关键词： Surface roughness

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Interdependent order allocation in the two-echelon supply chain using agent-based negotiation 36

Interdependent order allocation in the two-echelon supply ch...

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第36届中国控制会议

作者： Jian Wang Huimin Miao System Engineering Institute School of AutomationHuazhong University of Science and Technology Key Laboratory of Image Processing and Intelligent Control Huazhong University of Science and Technology Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology

ISBN: (纸本)9781538629185

Nowadays,many researches study the negotiation-based order allocation problem in the supply chain environment,aiming to improve the efficiency of the allocation and the profits of the supply chain *** competition and cooperation in supplier’s side are mainly addressed because of independent *** this paper,we analyze an interdependent order allocation problem in a two-echelon supply *** supply chain consists of a manufacturer echelon and a supplier *** to the interdependence,both the competition and cooperation in the manufacturer echelon are *** agent-based negotiation algorithm is developed to support the order allocation process and the conflicts *** show in experiments that orders under various supply chain contexts can be successfully allocated through the algorithm.

关键词： Supply chain system order allocation agent-based negotiation

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