检索结果-内蒙古大学图书馆

American control Conference

作者： Maximilian Balandat Ilya Tkachev Alessandro Abate Claire J. Tomlin Department of Electrical Engineering and Computer Sciences University of California Berkeley USA Delft Center for Systems & Control TU Delft Delft the Netherlands Department of Computer Science University of Oxford Oxford UK

ISBN: (纸本)9781479917730

We study the formation of short-term interest rates in the interbank lending market where banks are modeled as agents with bounded rationality. We propose a novel model which is based on bilateral contracts between risk-neutral profit-maximizing agents. To render the model tractable for large financial networks, we assume that banks' beliefs about the borrowing alternatives in the market are governed by a common reference interest rate, which is a function of the rates offered in the bilateral contracts. We show how this reference rate can be determined endogenously from a suitable mean field equilibrium and provide sufficient conditions for the existence of such an equilibrium together with an algorithm to compute it. Using simulation, we study the dependence of the equilibrium on the model parameters.

关键词： economic indicators contract model parameters Agents Sufficient conditions

来源：评论

学校读者我要写书评

暂无评论

Virtual Oscillator control Subsumes Droop control

Virtual Oscillator Control Subsumes Droop Control

引用

American control Conference

作者： Mohit Sinha Florian Dorfler Brian B. Johnson Sairaj V. Dhople Department of Electrical and Computer Engineering at the University of Minnesota (UMN) Minneapolis MN Automatic Control Laboratory at ETH Zurich Zurich Switzerland Power Systems Engineering Center at the National Renewable Energy Laboratory (NREL) Golden CO

ISBN: (纸本)9781479917730

In this paper we examine the amplitude and phase dynamics of power-electronic inverters in islanded microgrids that are controlled to emulate the dynamics of a class of weakly nonlinear Lienard-type oscillators. The general strategy of controlling inverters to emulate the behavior of Lienard-type oscillators is termed Virtual Oscillator control (VOC), and it presents a compelling time-domain alternative to ubiquitous droop control methods which linearly trade off voltage frequencies and magnitudes with active and reactive power injections. In comparison to droop control, which assumes a priori that the network operates in a quasi-stationary sinusoidal steady state, VOC is a time-domain control strategy that globally stabilizes a desired sinusoidal steady state. The main, and somewhat surprising, result of this paper is that--when reduced to the sinusoidal steady state--the VOC dynamics correspond to those of droop control. Hence, VOC is a globally stabilizing control strategy that can deal with higher-order harmonics and includes droop control in the harmonic steady state. The results are intriguing, in that they suggest that droop control laws can be recovered from averaging the complex dynamics of a class of weakly nonlinear limit-cycle oscillators.

关键词： droop control Oscillators control strategy MAINS dynamics Reactive power Sinusoidal

来源：评论

学校读者我要写书评

暂无评论

Indirect adaptive hierarchical fuzzy sliding mode controller for a class of nonlinear systems

Indirect adaptive hierarchical fuzzy sliding mode controller...

引用

Iranian Joint Congress on Fuzzy and Intelligent Systems (CFIS)

作者： Mohammad Mansouri Mohammad Teshnehlab Electrical and Computer engineering department K.N. Toosi University Tehran Iran Center of Excellence in Industrial Control K.N. Toosi University Tehran Iran

This study presents a novel indirect adaptive hierarchical fuzzy sliding mode controller for a class of high-order SISO nonlinear systems with unknown function in the presence of bounded disturbance. The hierarchical fuzzy system is able to reduce the number of rules and parameters with respect to ordinary fuzzy systems. On-line tuning algorithm for consequent part parameters of fuzzy rules in different layer of hierarchical fuzzy system is derived using defined Lyapunov function. It is proved that the suggested adaptive scheme can achieve asymptotically stable tracking of a reference input with guarantee of the bounded system signals. To show the effectiveness of the proposed method, control of flexible joint robot system is considered in simulations. The simulation results demonstrate the validity, efficiency and feasibility of the proposed approach to control of nonlinear dynamic system.

关键词： Fuzzy systems Adaptive control Nonlinear dynamical systems Sliding mode control Lyapunov methods

来源：评论

学校读者我要写书评

暂无评论

A GIS-based multi-criteria decision-making approach for seismic vulnerability assessment using quantifier-guided OWA operator: a case study of Tehran, Iran

引用

Annals of GIS 2015年第3期21卷 209-222页

作者： Moradi, Milad Delavar, Mahmoud Reza Moshiri, Behzad Department of Surevying and Geomatic Engineering College of Engineering University of Tehran Tehran Iran Center of Excellence in Geomatic Engineering in Disaster Management Department of Surveying and Geomatic Engineering College of Engineering University of Tehran Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran

Earthquakes are one of the most destructive disasters that cause huge damage to structures and human beings. It is not possible to predict the exact location, duration and intensity of an earthquake;however, the probable damages may be predicted in advance. Tehran has suffered from a number of non-standard aged buildings, a high population density and the existence of a number of faults which have made it significantly vulnerable to the risk of earthquakes. In this research, Tehran’s earthquake physical vulnerability map has been produced. The main contribution of this research is to take the effect of the optimism degree into account in the problem of seismic vulnerability assessment. The ordered weighted averaging operator is applied to provide a wide range of answers from pessimistic to optimistic solutions based on multi-criteria analysis. The results are then compared with the granular computing and intuitionistic fuzzy (Int_Fuzzy) models that indicate 91% and 89% similarity, respectively. © 2014 Taylor & Francis.

关键词： earthquake GIS multi-criteria decision making OWA operator Tehran vulnerability assessment

来源：评论

学校读者我要写书评

暂无评论

Signal simulation and experimental research on acoustic emission using LS-DYNA

引用

Journal of engineering Science and Technology Review 2015年第3期8卷 151-157页

作者： Jianchao, Zhang Rujiang, Hao Zhe, Wu Green, Jim Shaohua, Li School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Haidian District Beijing100044 China Engineering Training Center Shijiazhuang Tiedao University 17 Northeast Second Inner Ring Shijiazhuang050043 China Department of Electrical and Computer Engineering University of Miami Coral GablesFL33146 United States

To calculate sound wave velocity, we performed the Hsu-Nielsen lead break experiment using the ANSYS/LS-DYNA finite element software. First, we identified the key problems in the finite element analysis, such as selecting the exciting force, dividing the grid density, and setting the calculation steps. Second, we established the finite element model of the sound wave transmission in a plate under the lead break simulation. Results revealed not only the transmission characteristics of the sound wave but also the simulation and calculation of the transmission velocity of the longitudinal and transverse waves through the time travel curve of the vibration velocity of the sound wave at various nodes. Finally, the Hsu-Nielsen lead break experiment was implemented. The results of the theoretical calculation and simulation analysis were consistent with the experimental results, thus demonstrating that the research method using the ANSYS/LS-DYNA software to simulate sound wave transmissions in acoustic emission experiments is feasible and effective. © 2015 Kavala Institute of Technology.

关键词： Acoustic wave velocity

来源：评论

学校读者我要写书评

暂无评论

Developing an Online Steady-State Visual Evoked Potential-Based Brain-computer Interface System Using EarEEG

Developing an Online Steady-State Visual Evoked Potential-Ba...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Yu-Te Wang Masaki Nakanishi Simon Lind Kappel Preben Kidmose Danilo P. Mandic Yijun Wang Chung-Kuan Cheng Tzyy-Ping Jung Computer Science and Engineering Department University of California San Diego La Jolla CA92093 USA Swartz Center for Computational Neuroscience Institute for Neural Computation University of California San Diego La Jolla CA92093 USA Department of Engineering Aarhus University DK-8200 Aarhus N Denmark Department of Electrical and Electronics Engineering Imperial College London UK Swartz Center for Computational Neuroscience Institute for Neural Computation and Center for Advanced Neurological Engineering Institute of Engineering in Medicine University of California San Diego La Jolla CA92093 USA

ISBN: (纸本)9781424492695

The purpose of this study is to demonstrate an online steady-state visual evoked potential (SSVEP)-based BCI system using EarEEG. EarEEG is a novel recording concept where electrodes are embedded on the surface of earpieces customized to the individual anatomical shape of users' ear. It has been shown that the EarEEG can be used to record SSVEPs in previous studies. However, a long distance between the visual cortex and the ear makes the signal-to-noise ratio (SNR) of SSVEPs acquired by the EarEEG relatively low. Recently, filter bank- and training data-based canonical correlation analysis algorithms have shown significant performance improvement in terms of accuracy of target detection and information transfer rate (ITR). This study implemented an online four-class SSVEPbased BCI system using EarEEG. Four subjects participated in offline and online BCI experiments. For the offline classification, an average accuracy of 82.71±11.83 % was obtained using 4 seclong SSVEPs acquired from earpieces. In the online experiment, all subjects successfully completed the tasks with an average accuracy of 87.92±12.10 %, leading to an average ITR of 16.60±6.55 bits/min. The results suggest that EarEEG can be used to perform practical BCI applications. The EarEEG has the potential to be used as a portable EEG recordings platform, that could enable real-world BCI applications.

关键词： SSVEP acquired earpieces

来源：评论

学校读者我要写书评

暂无评论

João Hespanha [People in control]

引用

IEEE control Systems 2014年第1期34卷 22-24页

作者： Hespanha, João Center for Control Dynamical Systems and Computation University of California Santa BarbaraCA United States Department of Electrical and Computer Engineering University of California Harold Frank Hall Santa BarbaraCA93106-9560 United States

In this issue of IEEE control Systems Magazine, we speak with João Hespanha, who is a professor and chair of the department of electrical and computer engineering and Director of the center for control, Dynamical Systems, and computation at the University of California, Santa Barbara. He received a Licenciatura and an M.S. at Instituto Superior Técnico, Lisbon, Portugal, in 1991 and 1993, respectively, and a Ph.D. from Yale University in 1998. He was formerly on the faculty in the department of electrical engineering at the University of Southern California. He is a Fellow of IEEE and a recipient of the Automatica Theory/Methodology Best Paper Prize, the George S. Axelby Outstanding Paper Award, and the Antonio Ruberti Young Researcher Prize. His research interests include hybrid systems, networked control systems, cooperative control, advanced sensing, and systems biology. © 2014 IEEE.

关键词： Hybrid systems

来源：评论

学校读者我要写书评

暂无评论

Stability analysis for a general class of discrete-time polynomial fuzzy dynamic systems

Stability analysis for a general class of discrete-time poly...

引用

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Liwei Ren Xiaojun Ban Hao Ying Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin P. R. China Department of Electrical and Computer Engineering Wayne State University Detroit Michigan USA

ISBN: (纸本)9781467374293

The polynomial fuzzy models are capable of modeling complex dynamic systems. They have attracted increasing attention in the recent years as the models of choice for the development of more advanced fuzzy controllers. Little effort has been made to study the models themselves though. Like many other types of models, a polynomial fuzzy model aims at describing the physical system's dynamics based on the measured input-output data of the system. Importantly, a polynomial fuzzy model that appears to mimic the measured data reasonably well does not guarantee its validity. One way to assess model's quality is to check whether its stability is consistent with that of the physical system, which is the theme of our investigation. In this paper, we first propose a type of discrete-time polynomial fuzzy dynamic models, which comprises the general Takagi-Sugeno (T-S) fuzzy model as a special case. Then, based on the Lyapunov's linearization method, a necessary and sufficient condition is established for analytically determining the local asymptotic stability of the proposed models. A numerical example is given to illustrate the effectiveness and utility of our method.

关键词： Polynomials Fuzzy systems Asymptotic stability Stability analysis Data models Nonlinear dynamical systems

来源：评论

学校读者我要写书评

暂无评论

Modular Heavy Duty Vehicle Modelling and User Interface Development

引用

IFAC-PapersOnLine 2015年第15期48卷 354-360页

作者： Mümin Tolga Emirler İsmail Meriç Can Uygan Kerem Köprübasi Bülent Ünver Bilin Aksun Güvenç Levent Güvenç The Ohio State University Center for Automotive Research Columbus OH 43212 USA Istanbul Technical University Department of Control Engineering Istanbul 34469 TURKEY Ford Otosan A.S. Product Development Sancaktepe Istanbul 34885 TURKEY The Ohio State University Department of Mechanical and Aerospace Engineering Columbus OH 43210 USA The Ohio State University Department of Electrical and Computer Engineering OH 43210 USA

Engine calibration work requires the use of realistic simulation models for designing and testing powertrain control algorithms in offline simulations before hardware-in-the-loop, dynamometer and road testing. These models should be computationally efficient for repeated offline simulation runs. Also, they should have a modular, standardized structure to make it easy for a team of engineers to work on it simultaneously. In this paper, such a modular Simulink model is developed for heavy duty vehicle powertrain dynamics. The model framework is formed using subsystems such as engine, transmission, driveline, vehicle dynamics, auxiliaries, driver, environment, test scenarios, hardware-in-the-loop and analysis. A user interface is developed to ease the model usage and also to analyze the simulation results using plots and previously defined metrics. Well established and widely accepted simulation scenarios such as drive cycle test, performance test, gradeability test, cruise test and coast-down test are coded and integrated into the user interface.

关键词： Heavy duty vehicle modeling engine transmission driveline vehicle dynamics user interface

来源：评论

学校读者我要写书评

暂无评论

[email protected] : Analysis and results of evolving competitions for domestic and service robots

引用

Artificial Intelligence 2015年 229卷 258-281页

作者： Luca Iocchi Dirk Holz Javier Ruiz-del-Solar Komei Sugiura Tijn van der Zant Department of Computer Control and Management Engineering Sapienza University of Rome Italy Autonomous Intelligent Systems Group University of Bonn Germany Department of Electrical Engineering & Advanced Mining Technology Center Universidad de Chile Chile Information Services Platform Laboratory National Institute of Information and Communications Technology Japan Cognitive Robotics Laboratory University of Groningen The Netherlands

Scientific competitions are becoming more common in many research areas of artificial intelligence and robotics, since they provide a shared testbed for comparing different solutions and enable the exchange of research results. Moreover, they are interesting for general audiences and industries. Currently, many major research areas in artificial intelligence and robotics are organizing multiple-year competitions that are typically associated with scientific conferences. One important aspect of such competitions is that they are organized for many years. This introduces a temporal evolution that is interesting to analyze. However, the problem of evaluating a competition over many years remains unaddressed. We believe that this issue is critical to properly fuel changes over the years and measure the results of these decisions. Therefore, this article focuses on the analysis and the results of evolving competitions. In this article, we present the [email protected] competition, which is the largest worldwide competition for domestic service robots, and evaluate its progress over the past seven years. We show how the definition of a proper scoring system allows for desired functionalities to be related to tasks and how the resulting analysis fuels subsequent changes to achieve general and robust solutions implemented by the teams. Our results show not only the steadily increasing complexity of the tasks that [email protected] robots can solve but also the increased performance for all of the functionalities addressed in the competition. We believe that the methodology used in [email protected] for evaluating competition advances and for stimulating changes can be applied and extended to other robotic competitions as well as to multi-year research projects involving Artificial Intelligence and Robotics.

关键词： Robotic competitions Artificial intelligence and robotics Benchmarking

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：