检索结果-南通市图书馆

TARGET AGGREGATION OF SECOND-ORDER MULTI-AGENT SYSTEMS WITH SWITCHING INTERCONNECTION

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

Journal of Systems Science & Complexity 2012年第3期25卷 430-440页

作者： Youcheng LOU Yiguang HONG guodong shi Key Lab of Systems and Control Institute of Systems ScienceAcademy of Mathematics and Systems ScienceChinese Academy of Sciences ACCESS Linnaeus Centre School of Electrical EngineeringRoyal Institute of Technology

In this paper, the target aggregation is investigated for a multi-agent system consisting of second-order agents and multiple leaders. Sufficient conditions are proposed to make the agents approach the target set spanned by these moving leaders. With the condition on switching interconnection topologies, all mobile agents can asymptotically track the dynamical target set specified by multiple moving leaders with bounded error. Moreover, discussion on the case with static leaders is also given.

关键词： Multi-agent systems multiple leaders switching interconnection topologies target ag-gregation.

Decentralized robust guaranteed cost control for a class of interconnected singular large-scale systems with time-delay and parameter uncertainty

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2007年第1期18卷 111-119页

作者： Wo Songlin shi guodong Zou Yun Division of Public Teaching Changzhou Coll. of Information Technology Changzhou 213164 P. R. China Dept. of Automation Nanjing Univ. of Science and Technology Nanjing 210094 P. R. China

The decentralized robust guaranteed cost control problem is studied for a class of interconnected singular large-scale systems with time-delay and norm-bounded time-invariant parameter uncertainty under a given quadratic cost performance function. The problem that is addressed in this study is to design a decentralized robust guaranteed cost state feedback controller such that the closed-loop system is not only regular, impulse-free and stable, but also guarantees an adequate level of performance for all admissible uncertainties. A sufficient condition for the existence of the decentralized robust guaranteed cost state feedback controllers is proposed in terms of a linear matrix inequality （LMI） via LMI approach. When this condition is feasible, the desired state feedback decentralized robust guaranteed cost controller gain matrices can be obtained. Finally, an illustrative example is provided to demonstrate the effectiveness of the proposed approach.

关键词： Uncertain singular large-scale systems Time-delay system Guaranteed cost control LMI

Using RBF Neural Network for OptimumControl of a Cold Storage

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2000年第4期11卷 30-36页

作者： shi guodong Wang Qihong Xu Yan Xue Guoxin Jiangsu Institution of Petrochemical Technology Changzhou 213016 P. R. China

In recent years, advanced control technologies have been used for the optimum control of a cold storage. But there are still a lot of shortcomings. One of the main problems is that the traditional methods can't realize the on-line predictive optimum control of a refrigerating system with simple and valid algorithms. An RBF neural network has a strong ability in nonlinear mapping, a good interpolating value performance, and a higher training speed. Thus a two-stage RBF neural network is proposed in this paper. Combining the measured values with the predicted values, the two-stage RBF neural network is used for the on-line predictive optimum control of the cold storage temperature. The application results of the new methods show a great success.

关键词： Algorithms Cold storage Functions Interpolation Neural networks Online systems Predictive control systems

Dynamics analysis of chaotic circuit with two memristors

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2011年第8期54卷 2180-2187页

作者： BAO BoCheng shi guodong XU JianPing LIU Zhong PAN SaiHu School of lnformation Science and Engineering Changzhou University Changzhou 213164 China School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China Department of Electronic Engineering Nanjing University of Science and Technology Nanjing 210094 China

Based on Chua’s chaotic oscillation circuit, a fifth-order chaotic circuit with two memristors is designed and its corresponding dimensionless mathematic model is established. By using conventional dynamical analysis methods, stability analysis of the equilibrium set of the circuit is performed, the distribution of stable and unstable regions corresponding to the memristor initial states is achieved, and the complex dynamical behaviors of the circuit depending on the circuit parameters and the memristor initial states are investigated. The theoretical analysis and numerical simulation results demonstrate that the proposed chaotic circuit with two memristors has an equilibrium set located on the plane constituted by the inner state variables of two memristors. The stability of the equilibrium set depends on both the circuit parameters and the initial states of the two memristors. Rich nonlinear dynamical phenomena, such as state transitions, transient hyperchaos and so on, are expected.

关键词： memristor chaotic circuit initial state equilibrium point set stability

In-situ synthesis of TiO_2 rutile/anatase heterostructure by DC magnetron sputtering at room temperature and thickness effect of outermost rutile layer on photocatalysis

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2017年第10期29卷 33-42页

作者： Wang Hui shi guodong Zhang Xiaoshu Zhang Wei Huang Lin Yu Ying College of Physical Science and Technology Central China Normal University Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology

TiO2 rutile/anatase heterostructure thin films with varying rutile thickness have been in-situ synthesized via DC magnetron sputtering with Ar gas at room temperature. The crystal texture, surface morphology, energy gap and optical properties of the films have been investigated by X-ray diffraction meter, grazing incidence X-ray diffraction meter, Raman spectroscopy, scanning electron microscopy, and UV–visible spectrophotometer, which indicates that the rutile/anatase heterostructure films are successfully fabricated. The further degradation experiments display that the photocatalytic activity can be dramatically affected by the thickness of the outmost rutile layer and the 100 nm thickness exhibits the best performance in all of the TiO2 thin films. With the increase of the outmost rutile layer, the optical band gap of TiO2 film displays a systematic decrease slightly. However,the change in photocatalytic activity does not coincide with that in the band gap. The photoresponse and electrochemical properties of the thin films have been characterized to understand the mechanism of the varied photocatalytic activity.

关键词： TiO2 film Heterostructure Magnetron sputtering Dye degradation

Two-dimensional perovskite capping layer for stable and efficient tin-lead perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第5期62卷 629-636页

作者： Jin Yuan Yuanzhi Jiang Tingwei He guodong shi Zixiong Fan Mingjian Yuan Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of ChemistryNankai University Renewable Energy Conversion and Storage Center Nankai University

Mixed tin-lead iodide perovskites exhibit the characteristics of low toxicity and improved light harvesting ability up to nearinfrared(NIR) spectral region, making them as an attractive alternative for traditional lead based perovskites. However, the performance of lead-based perovskites solar cells is still far inferior to their lead analogues owing to the unavoidable oxidation of Sn^(2+)to Sn^(4+). Here we introduced two-dimensional(2D) perovskite on the top of three dimensional(3D) perovskite film as a capping layer to reduce the self-oxidation, and thus improved the device stability. 2D capping layer was then confirmed by X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS) analysis. The existence of the 2D protecting thin layer significantly reduce the spontaneous Sn^(2+)oxidation, thus improve the device performance and reduce the hysteresis. The phenomena could be ascribed to the improved charge extraction efficiency causing by prohibited nonradiative recombination. On top of this, the photovoltaic devices based on conventional-structure configuration were fabricated. Taking advantage of the 2D capping layer, 2D/3D hybrid perovskite photovoltaic devices achieve a open-circuit voltage(Voc) of 0.77 V with short circuit current density(Jsc) of 26.60 mA cm^(-2), delivering the best-performing power conversion efficiency of 15.5%. Moreover, the 2D/3D perovskite devices maintained 60% its initial efficiency after 40 h exposed in air(humidity around 30%, temperature 22 °C),while 3D perovskite-based devices completely failed.

关键词： two-dimensional perovskites tin-lead perovskites 2D/3D stability

Design of multidimensional nanocomposite material to realize the application both in energy storage and electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2018年第3期63卷 152-154页

作者： Qiancheng Zhu Desheng Cai Xiaoqin Lan guodong shi Kai Jin Jianqing Zhou Wenjuan Chen Ying Yu Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University

The development of clean,sustainable and renewable energy storage systems is in urgent need with the fast-growing energy demand in the areas of electric vehicles and mobile electronics ***-ion batteries(LIBs)have been deemed to be the most promising energy storage devices for their high power density,long cycle life and fast charge-discharge rates[1].Transition

关键词：存储系统精力材料设计应用程序多维锂离子电池存储设备电子学

CoS_(2)nanowires supported graphdiyne for highly efficient hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第9期30卷 272-278页

作者： Wangjing Xie Kang Liu guodong shi Xinliang Fu Xiaojie Chen Zixiong Fan Min Liu Mingjian Yuan Mei Wang Key Laboratory of Marine Chemistry Theory and Technology (Ministry of Education)College of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai University300071 TianjinChina School of Physics and Electronics State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083China College of Science Henan University of TechnologyZhengzhou 450001China

Transition metal sulfides are an important category for hydrogen evolution reaction(HER).However,only few edge unsaturated sulfurs functionalize as catalytic sites,which has dramatically limited the catalytic activity and *** this work,planar unsaturated sulfurs in(211)plane of the CoS_(2)nanowires have been successfully activated through constructing Graphdiyne-CoS_(2)heterojunction *** corresponding electrons transfer energy barriers for these planar unsaturated sulfurs have been significantly diminished,which are induced by the synergetic effects of the sp~1 hybridized carbons and unsaturated planar *** addition,DFT simulations reveal the synergetic effects of the sp~1 hybridized carbons and unsaturated planar sulfurs can promote electron transfer kinetics of the key step,VolmerHeyrovsky step,of the *** expected,the Graphdiyne-CoS_(2)heterojunction nanocomposites exhibit superior HER catalytic performance with low overpotential of 97 mV at 10 mA cm^(-2),and the Tafel slope of 56 mV dec^(-1).Furthermore,the heterojunction shows outstanding stability as well due to the pr tection of the Graphdiyne(GDY).The approach thus paves the way for the further efficient transition metal disulfides catalyst manufactures.

关键词： Graphdiyne Electrocatalysts Hydrogen evolution reaction DFT simulation 2D carbon material

BiHom-H-pseudoalgebras and their constructions

在线全文

学校读者我要写书评

暂无评论

Journal of Southeast University(English Edition) 2019年第2期35卷 269-272页

作者： shi guodong Wang Shuanhong School of Mathematics Southeast UniversityNanjing 211189China

The definition and an example of BiHom-associative H-pseudoalgebra are given.A BiHom-H-pseudoalgebra is an H-pseudoalgebra(A,μ)with two mapsα,β∈HomH(A,A)satisfying the BiHom-associative law which generalizes BiHom-associative algebras and associative ***,a method which is called the Yau twist of constructing BiHom-associative H-pseudoaglebra(A,(IH■H■Hα)μ,α,β)from an associative H-pseudoalgebra(A,μ)and two maps of H-pseudoalgebrasα,β,is ***,a generalized form of the Yau twist is *** concerns constructing a BiHom-associative H-pseudoalgebra(A,μ(α■β),α^~α,β^~β)from a BiHom-associative H-pseudoalgebra(A,μ,α^~,β^~)and two mapsα,β∈Hom H(A,A).Finally,a method of constructing BiHom-associative H-pseudoalgebra on tensor product space A■B of two BiHom-associative H-pseudoalgebras is given.

关键词： BiHom-associative H-pseudoalgebrsa Yau twist tensor product BiHom-associative H-pseudoalgebras