检索结果-内蒙古大学图书馆

Signal compaction by maximum verisimilitude

UPB Scientific Bulletin, Series C: Electrical Engineering 2008年第3期70卷 59-74页

作者： Stefanoiu, Dan Culita, Janetta Dept. of Automatic Control and Computer Science University Politehnica of Bucharest Bucharest Romania

Sampled data provided by a process are usually corrupted by various noises. Although data are required to be denoised before applying any further processing, the corrupting noises could encode a part of desired information. A partial denoising is suitable in this case, as part of pre-processing procedure. Another requirement frequently used in data pre-processing is to compress the useful information in a smaller number of data. Partial denoising and compression are gathered in the concept of "signal compaction". The paper introduces an original method for providing compacted preliminary data, relied on the concept of "verisimilitude" and requiring no synchronization signal accompanying the acquired data.

关键词： Compaction

来源：评论

学校读者我要写书评

暂无评论

Event-based selective control strategy for raceway reactor: A simulation study

引用

IFAC-PapersOnLine 2016年第7期49卷 478-483页

作者： Pawlowski, A. Frenández, I. Guzmán, J.L. Berenguel, M. Acién, F.G. Dormido, S. Dept. of Computer Science and Automatic Control UNED Madrid Spain Dept. of Computer Science University of Almería ceiA3 CIESOL Almería Spain Dept. of Chemical Engineering University of Almería ceiA3 CIESOL Almer´ia Spain

This work presents a simulation study of an event-based selective control strategy for a raceway reactor. The control system aims are to maintain simultaneously a pH and dissolved oxygen within specific limits. In the analyzed control scheme, the pH value is prioritized over the dissolved oxygen, since it has a critical influence on the process performance. Besides, the dissolved oxygen also influences the photosynthesis rate and should be kept within the limits. The control structure is evaluated through simulation, where a nonlinear model for microalgae culture in the raceway photobioreactor is used. Analysis of different configurations allows to determine the most adequate control system setup to achieve the desired goals. The obtained results show that combination of an event-based approach with selective control allows to increase the overall productivity as well as to address effective CO2utilization and aeration system energy minimization. © 2016

关键词： Dissolved oxygen Algae control systems Dissolution Microorganisms Dissolved oxygen control Micro algae PH control raceway reactor Selective control

来源：评论

学校读者我要写书评

暂无评论

A SCORM based package model for WebLabs 44

A SCORM based package model for WebLabs

引用

44th Annual Frontiers in Education Conference, FIE 2014

作者： Ruano-Ruano, Ildefonso Gámez-García, Javier Bencomo, Sebastián Dormido Ortega, Juan Gómez GRAV Group University of Jaén Jaén Spain Dept. of Computer Science and Automatic Control UNED Madrid Spain

ISBN: (纸本)9781479939213

Web Laboratories (WebLabs) are essential resources for engineering education. Within this type of laboratory, a new Sharable Content Object Reference Model (SCORM) package design model is shown in this work. The proposed model is based on a set of resources that form a complete educational structure;taking into account the sequencing and navigation among the elements that compose it. In addition, it can be uploaded to a Learning Management System (LMS), offering to the students an effective tool to work with web labs. The package is structured in 4 sections or pages: Introduction, Theory, Virtual/Remote Laboratory (VRL) and Assessment;where the last performs an automated verification of the work done by the learner. In this way, one of the advantage of this methodology is that the instant results of the assessments, performed by the SCORM package, is stored in the inner LMS. Some WebLabs performing this methodology are being developed in the University of Jaén. In this work, an example is developed: 'Modelling of Dynamic System: DC Motor'. This WebLab is used in the Industrial Automation course that is included in several Industrial Engineering degrees. © 2014 IEEE.

关键词： Laboratories

来源：评论

学校读者我要写书评

暂无评论

Web-based control laboratory: The ball and beam system

Web-based control laboratory: The ball and beam system

引用

作者： Guinaldo, M. Vargas, H. Sánchez, J. Sanz, E. Dormido, S. Dept. Of Computer Science and Automatic Control UNED C/ Juan del Rosal 16 28040 Madrid Spain

ISBN: (纸本)9783902661562

This paper presents a Web-based control laboratory of a non-linear and unstable system: the ball and beam plant. Different control strategies, apart from the traditional PID, as Robust, Fuzzy and PD-Reset control have been taken to give students a wider vision of control approaches. The client-side of the virtual laboratory has been developed using EJS (Easy Java Simulations), an open-source tool that allows creating Java applications easily. Meanwhile, the application that locally interacts with the system is written in LabVIEW. Different experiences are presented showing the advantages of advanced control strategies over PD control.

关键词： Websites

来源：评论

学校读者我要写书评

暂无评论

Application of New Type BP Neural Networks for Magnetic Measurement

引用

High Technology Letters 2002年第2期8卷 83-86页

作者：张旭 Che Rensheng Kinouchi Y Luo Xiaochuan Dept. of Automatic Measurement and Control School of Computer Science and EngineeringHarbin Institute of Technology Harbin 150001 P.R.China Dept. of Electronic Engineering University of Tokushima Japan

Magnetic measurement is a typical inverse problem in Biomedical field. In this kind of problem we always need to locate the positions and moments of one or more magnetic dipoles. Although using the traditional methods to solve this kind of inverse problem has all kinds of shortcomings, BPNN (Back Propagation Neural Networks) method can be used to solve this typical inverse problem fast enough for real time measurement. In the traditional BPNN method, gradient descent search method is performed for error propagation. In this paper the authors propose a new algorithm that Newton method is performed for error propagation. For the cost function is highly nonconvex in the magnetic measurement problem, the new kind of BPNN can get convergent results quickly and precisely. A simulation result for this method is also presented.

关键词： magnetic measurement BP neural network gradient method Newton Gauss method

来源：评论

学校读者我要写书评

暂无评论

Studying robot-environment interaction via transparent controllers

Studying robot-environment interaction via transparent contr...

引用

IEEE 15th International Conference on Advanced Robotics: New Boundaries for Robotics, ICAR 2011

作者： Akanyeti, O. Fiorini, P. Billings, S.A. Dept. of Computer Science University of Verona Italy Dept. of Automatic Control and Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)9781457711589

In this paper we address the question of "Why is it that a mobile robot, programmed in a certain way and placed in some environment to execute a program, behaves in the way it does?". We present three real world experiments in which we first obtain transparent controllers to express sensor-motor couplings of a mobile robot. We then use these models to analyze the robot behaviour formally;in particular to understand how the sensor readings are related to motor commands, to evaluate the derived controllers from a mathematical point of view and even to predict the behaviour of the robot in untested environments. © 2011 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Quality-driven synthesis of embedded multi-mode control systems 09

Quality-driven synthesis of embedded multi-mode control syst...

引用

2009 46th ACM/IEEE Design Automation Conference, DAC 2009

作者： Samii, Soheil Eles, Petru Zebo, Peng Cervin, Anton Dept. of Computer and Information Science Linköping University Linköping Sweden Dept. of Automatic Control Lund University Lund Sweden

ISBN: (纸本)9781605584973

At runtime, an embedded control system can switch between alternative functional modes. In each mode, the system operates by using a schedule and controllers that exploit the available computation and communication resources to optimize the control performance in the running mode. The number of modes is usually exponential in the number of control loops, which means that all controllers and schedules cannot be produced in affordable design-time and stored in memory. This paper addresses synthesis of multi-mode embedded control systems. Our contribution is a method that trades control quality with optimization time, and that efficiently selects the schedules and controllers to be synthesized and stored in memory. Copyright 2009 ACM.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

The challenge of cloud control 8

The challenge of cloud control

引用

8th International Workshop on Feedback Computing

作者： Kihl, Maria Elmroth, Erik Tordsson, Johan Årzén, Karl Erik Robertsson, Anders Dept. of Electrical and Information Technology Lund University Sweden Dept. of Computer Science Umeå University Sweden Dept of Automatic Control Lund University Sweden

Today's cloud data center infrastructures are not even near being able to cope with the enormous and rapidly varying capacity demands that will be reality in a near future. So far, very little is understood about how to transform today's data centers (being large, power-hungry facilities, and operated through heroic efforts by numerous administrators) into a self-managed, dynamic, and dependable infrastructure, constantly delivering expected QoS with reasonable operation costs and acceptable carbon footprint for large-scale services with sometimes dramatic variations in capacity demands. In this paper, we discuss some of the major challenges for resource-optimized cloud data center. We propose a new research area called Cloud control, which is a control theoretic approach to a range of cloud management problems, aiming to transform todaýs static and energy consuming cloud data centers into self-managed, dynamic, and dependable infrastructures, constantly delivering expected quality of service with acceptable operation costs and carbon footprint for large-scale services with varying capacity demands. © 8th International Workshop on Feedback Computing 2013. All rights reserved.

关键词： Carbon footprint

来源：评论

学校读者我要写书评

暂无评论

Towards a Holistic controller: Reinforcement Learning for Data Center control 21

Towards a Holistic Controller: Reinforcement Learning for Da...

引用

12th ACM International Conference on Future Energy Systems, e-Energy 2021

作者： Heimerson, Albin Brännvall, Rickard Sjölund, Johannes Eker, Johan Gustafsson, Jonas Lund University Dept. of Automatic Control Sweden Rise Research Institutes of Sweden Dept. of Computer Science Sweden Ericsson Research Lund University Sweden

ISBN: (纸本)9781450383332

The increased use of cloud and other large scale datacenter IT services and the associated power usage has put the spotlight on more energy-efficient datacenter management. In this paper, a simple model was developed to represent the heat rejection system and energy usage in a small DC setup. The model was then controlled by a reinforcement learning agent that handles both the load balancing of the IT workload, as well as cooling system setpoints. The main contribution is the holistic approach to datacenter control where both facility metrics, IT hardware metric and cloud service logs are used as inputs. The application of reinforcement learning in the proposed holistic setup is feasible and achieves results that outperform standard algorithms. The paper presents both the simplified DC model and the reinforcement learning agent in detail and discusses how this work can be extended towards a richer datacenter model. © 2021 ACM.

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

On the integration of skilled robot motions for productivity in manufacturing

On the integration of skilled robot motions for productivity...

引用

IEEE International Symposium on Assembly and Manufacturing

作者： Bjorkelund, Anders Edstrom, Lisett Haage, Mathias Malec, Jacek Nilsson, Klas Nugues, Pierre Robertz, Sven Gestegard Storkle, Denis Blomdell, Anders Johansson, Rolf Linderoth, Magnus Nilsson, Anders Robertsson, Anders Stolt, Andreas Bruyninckx, Herman Dept. of Computer Science Lund University Sweden Dept of Automatic Control Lund University Sweden Dept. of Mechanical Engineering K.U. Leuven Belgium

ISBN: (纸本)9781612843438

Robots used in manufacturing today are tailored to their tasks by system integration based on expert knowledge concerning both production and machine control. For upcoming new generations of even more flexible robot solutions, in applications such as dexterous assembly, the robot setup and programming gets even more challenging. Reuse of solutions in terms of parameters, controls, process tuning, and of software modules in general then gets increasingly important. There has been valuable progress within reuse of automation solutions when machines comply with standards and behave according to nominal models. However, more flexible robots with sensor-based manipulation skills and cognitive functions for human interaction are far too complex to manage, and solutions are rarely reusable since knowledge is either implicit in imperative software or not captured in machine readable form. We propose techniques that build on existing knowledge by converting structured data into an RDF-based knowledge base. By enhancements of industrial control systems and available engineering tools, such knowledge can be gradually extended as part of the interaction during the definition of the robot task. © 2011 IEEE.

关键词： Manufacture

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：