检索结果-内蒙古大学图书馆

International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Barbara Bazzana Ralph Brantjes Chiara Gabellieri Antonio Franchi Robotics and Mechatronics Department Electrical Engineering Mathematics and Computer Science (EEMCS) Faculty University of Twente Enschede The Netherlands Department of Computer Control and Management Engineering Sapienza University of Rome Rome Italy

ISBN: (数字)9798350357882

ISBN: (纸本)9798350357899

In this paper, we propose a model for the thrust coefficient of propellers that can take into account cross-influence between adjacent propellers. The aerodynamic interaction between propellers in multirotor aerial vehicles reduces the thrust they can produce. The influence between propellers depends on their relative positioning and orientation, which are taken into account by the proposed model. It is validated on measurements collected by a force sensor mounted on a propeller for different configurations of the adjacent propellers in a support structure. In this work, we focus on configurations with small relative orientations. Results show that the proposed model outperforms the traditional constant model in terms of thrust prediction on the data we collected, and it performs better than other models with fewer parameters, being the only one with less than 10% maximum percentage error.

关键词： Training Adaptation models Torque Propellers Atmospheric modeling Force Velocity control

来源：评论

学校读者我要写书评

暂无评论

QoS-Aware Dynamic Resource Management in Heterogeneous Mobile Cloud Computing Networks

引用

China Communications 2014年第5期11卷 144-159页

作者： SI Pengbo ZHANG Qian F. Richard YU ZHANG Yanhua College of Electronic Information and Control Engineering Beijing University of Technology Beijing 100124 P.R. China Department of Systems and Computer Engineering Carleton University Ottawa K1 S 5B6 Canada

In mobile cloud computing(MCC) systems,both the mobile access network and the cloud computing network are heterogeneous,implying the diverse configurations of hardware,software,architecture,resource,*** such heterogeneous mobile cloud(HMC) networks,both radio and cloud resources could become the system bottleneck,thus designing the schemes that separately and independently manage the resources may severely hinder the system *** this paper,we aim to design the network as the integration of the mobile access part and the cloud computing part,utilizing the inherent heterogeneity to meet the diverse quality of service(QoS)requirements of ***,we propose a novel cross-network radio and cloud resource management scheme for HMC networks,which is QoS-aware,with the objective of maximizing the tenant revenue while satisfying the QoS *** proposed scheme is formulated as a restless bandits problem,whose "indexability" feature guarantees the low complexity with scalable and distributed *** simulation results are presented to demonstrate the significant performance improvement of the proposed scheme compared to the existing ones.

关键词： service-aware approach dynamic resource management heterogeneous mobile cloud restless bandits formulation

来源：评论

学校读者我要写书评

暂无评论

Hierarchical model predictive control of integrated quality and quantity in drinking water distribution systems

引用

Urban Water Journal 2005年第2期2卷 125-137页

作者： Duzinkiewicz, K. Brdys, M. A. Chang, T. Department of Control Engineering Faculty of Electrical Engineering and Automatic Control Gdánsk University of Technology. G. Narutowicza 11/12 Gdánsk 80-952 Poland Department of Electronic Electrical and Computer Engineering School of Engineering The University of Birmingham Birmingham B15 2TT UK

An integrated approach to control of quantity and quality in water supply and distribution systems is proposed. The integrated control consists in optimising the operational cost, meeting a demand on water of desired quality and maintaining the system constraints. This constrained optimising control problem is complex due to nonlinearities, large dimension, output constraints, mixed-integer structure of the variables involved, at least two time scales in the system dynamics and an uncertainty. A sub-optimal two-level hierarchical control structure is proposed that allows incorporating the desired controller functions and yet making the synthesis of these functions possible. The algorithms for implementing the functionalities are proposed and discussed. Detail design of the lower level controller is presented and investigated. The controller performance is validated by simulation. [ABSTRACT FROM AUTHOR]

关键词： Bounding method Chlorine residuals Constraints Predictive control Transport delay Uncertain dynamic systems Water quality control

来源：评论

学校读者我要写书评

暂无评论

Improved computation of individual ZPD in a distance learning system

Improved computation of individual ZPD in a distance learnin...

引用

International Conference on Information Technology Based Higher Education and Training, ITHET

作者： Sara De Cristofano Maria De Marsico Andrea Sterbini Marco Temperini Department of Computer Science Sapienza University of Rome Rome Italy Department of Computer Control and Management Engineering Antonio Ruberti Sapienza University of Rome Rome Italy

ISBN: (纸本)9781509007790

This paper builds upon theoretical studies in the field of social constructivism. Lev Vygotsky is considered one of the greatest representatives of this research line, with his theory of the Zone of Proximal Development (ZPD). Our work aims at integrating this concept in the practice of a computer-assisted learning system. For each learner, the system stores a model summarizing the current Student Knowledge (SK). Each educational activity is specified through the deployed content, the skills required to tackle it, and those acquired, and is further annotated by the effort estimated for the task. The latter may change from one student to another, given the already achieved competence. A suitable weighting of the robustness (certainty) of student's skills, stored in SK, and their combination are used to verify the inclusion of a learning activity in the student's ZPD. With respect to our previous work, the algorithm for the calculation of the ZPD of the individual student has been optimized, by enhancing the certainty weighting policy, and a graphical display of the ZPD has been added. Thanks to the latter, the student can get a clear vision of the learning paths that he/she can presently tackle. This both facilitates the educational process, and helps developing the metacognitive ability self-assessment.

关键词： Problem-solving computer aided instruction Collaboration Context Electronic learning Learning systems

来源：评论

学校读者我要写书评

暂无评论

A new statistical approach for the extraction of adjacency matrix from effective connectivity networks

A new statistical approach for the extraction of adjacency m...

引用

2013 35th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2013

作者： Toppi, J. De Vico Fallani, F. Petti, M. Vecchiato, G. Maglione, A. Cincotti, F. Salinari, S. Mattia, D. Babiloni, F. Astolfi, L. Department of Computer Control and Management Engineering Univ. of Rome Sapienza Italy Dept. of Physiology and Pharmacology University of Rome Sapienza Italy Department of Anatomy Histology Forensic Medicine and Orthopedics University of Rome Sapienza Italy Fondazione Santa Lucia Hospital Rome Italy

ISBN: (纸本)9781457702167

Graph theory is a powerful mathematical tool recently introduced in neuroscience field for quantitatively describing the main properties of investigated connectivity networks. Despite the technical advancements provided in the last few years, further investigations are needed for overcoming actual limitations in the field. In fact, the absence of a common procedure currently applied for the extraction of the adjacency matrix from a connectivity pattern has been leading to low consistency and reliability of ghaph indexes among the investigated population. In this paper we proposed a new approach for adjacency matrix extraction based on a statistical threshold as valid alternative to empirical approaches, extensively used in Neuroscience field (i.e. fixing the edge density). In particular we performed a simulation study for investigating the effects of the two different extraction approaches on the topological properties of the investigated networks. In particular, the comparison was performed on two different datasets, one composed by uncorrelated random signals (null-model) and the other one by signals acquired on a mannequin head used as a phantom (EEG null-model). The results highlighted the importance to use a statistical threshold for the adjacency matrix extraction in order to describe the real existing topological properties of the investigated networks. The use of an empirical threshold led to an erroneous definition of small-world properties for the considered connectivity patterns. © 2013 IEEE.

关键词： Extraction

来源：评论

学校读者我要写书评

暂无评论

The research and design of invisible digital watermarking based on DCT and Matlab

The research and design of invisible digital watermarking ba...

引用

International Conference on computer Science and Network Technology (ICCSNT)

作者： Zhuokang Jia Ting Zhi Electrical & Computer Engineering Department Western Michigan University Kalamazoo United States School of Control and Computer Engineering North China Electric Power University Beijing China

Digital watermarking can be used to protect the intellectual property for multimedia data. Digital watermarking has two main advantages: firstly, the authority on a particular file can be traced; secondly, there is no need to use additional space to maintain this information. A digital watermark is an invisible secret message that is embedded directly in a multimedia file. According to applications, watermarking systems can be classified in fragile and robust. The watermark is designed to be robust against attacks in order to protect ownership of the image. In addition, watermarking systems may be classified in non-blind detection or blind detection which decide whether the detector uses the original image to extract the watermark or not. In our paper, we introduce a blind image watermarking system, since only the embedded image and the secret key are required in the detection phase, and the original image is not required.

关键词： Watermarking PSNR Correlation Robustness Image coding Transforms

来源：评论

学校读者我要写书评

暂无评论

Achieving differential privacy of data disclosure from non-intrusive load monitoring in smart grid 1

引用

9th International Symposium on Cyberspace Safety and Security, CSS 2017

作者： Cao, Hui Liu, Shubo Guan, Zhitao Wu, Longfei Wang, Tian School of Computer Wuhan University Wuhan430072 China School of Control and Computer Engineering North China Electric Power University Beijing102206 China North China Branch of State Grid Corporation of China Beijing10053 China Department of Mathematics and Computer Science Fayetteville State University FayettevilleNC28301 United States College of Computer Science and Technology Huaqiao University Xiamen361021 China

ISBN: (数字)9783319694719

ISBN: (纸本)9783319694702

In smart grid, large quantities of smart meters are installed in customers’ homes to collect electricity usage data, which can then be used to draw the load curve versus time of a day, and develop a plan or model for power generation. However, such data can also reveal customer’s daily activities. In addition, a non-intrusive load monitoring (NILM) device can monitor an electrical circuit that contains a number of appliances which switch on and off independently. If an adversary analyzes the meter readings together with the data measured by NILM device, the customer’s privacy will be disclosed. In this paper, we propose an effective privacy-preserving scheme for electric load monitoring, which can guarantee differential privacy of data disclosure in smart grid. In the proposed scheme, an energy consumption behavior model based on Factorial Hidden Markov Model (FHMM) is established. In addition, Laplace noise is added to the behavior parameter, which is different from the traditional methods that usually add noise to the energy consumption data. The analysis shows that the proposed scheme can get a better trade-off between utility and privacy compared with other popular methods. © 2017, Springer International Publishing AG.

关键词： Smart power grids

来源：评论

学校读者我要写书评

暂无评论

Minimum structural sensor placement for switched linear time-invariant systems and unknown inputs

arXiv

引用

arXiv 2021年

作者： Reed, Emily A. Ramos, Guilherme Bogdan, Paul Pequito, Sérgio Ming Hsieh Electrical and Computer Engineering Department University of Southern California United States Department of Electrical and Computer Engineering Faculty of Engineering University of Porto Portugal University of Southern California Ming Hsieh Electrical and Computer Engineering Department Delft University of Technology Delft Center for Systems and Control

In this paper, we study the structural state and input observability of continuous-time switched linear time- invariant systems and unknown inputs. First, we provide necessary and sufficient conditions for their structural state and input observability that can be efficiently verified in O((m(n + p))2), where n is the number of state variables, p is the number of unknown inputs, and m is the number of modes. Moreover, we address the minimum sensor placement problem for these systems by adopting a feed-forward analysis and by providing an algorithm with a computational complexity of O((m(n + p) + α)2.373), where α is the number of target strongly connected components of the system's digraph representation. Lastly, we explore different assumptions on both the system and unknown inputs (latent space) dynamics that add more structure to the problem, and thereby, enable us to render algorithms with lower computational complexity, which are suitable for implementation in large-scale systems. Copyright © 2021, The Authors. All rights reserved.

关键词： Time varying control systems

来源：评论

学校读者我要写书评

暂无评论

The conceptual approach of system for automatic vehicle accident detection and searching for life signs of casualties 5th

The conceptual approach of system for automatic vehicle acci...

引用

5th International Doctoral Symposium on Applied Computation and Security Systems, ACSS 2018

作者： Lupinska-Dubicka, Anna Tabedzki, Marek Adamski, Marcin Rybnik, Mariusz Omieljanowicz, Miroslaw Omieljanowicz, Andrzej Szymkowski, Maciej Gruszewski, Marek Klimowicz, Adam Rubin, Grzegorz Saeed, Khalid Faculty of Computer Science Bialystok University of Technology Bialystok Poland Faculty of Mathematics and Informatics University of Bialystok Bialystok Poland Faculty of Mechanical Engineering Department of Automatic Control and Robotics Bialystok University of Technology Bialystok Poland Faculty of Computer and Food Science Lomza State University of Applied Sciences Lomza Poland

ISBN: (纸本)9789811337017

The European eSafety initiative aims to improve the safety and efficiency of road transport. The main element of eSafety is the pan-European eCall project—an in-vehicle system which idea is to inform about road collisions or serious accidents. As estimated by the European Commission, the implemented system will reduce services’ response time by 40%. This will save 2,500 people a year. In 2015, the European Parliament adopted the legislation that from the end of March 2018 all new cars from the EU should be equipped with the eCall system. The limitation of this idea is that only small part of cars driven in UE are brand new (about 3.7% brand new cars were sold in 2015). This paper presents the first concept of an onboard eCall device which can be installed at the owners’ request in used vehicles. The proposed system will be able to detect a road accident, indicate the number of vehicle’s occupants, report their vital functions, and send that information to dedicated emergency services via duplex communication channel. © Springer Nature Singapore Pte Ltd. 2019.

关键词： Emergency services

来源：评论

学校读者我要写书评

暂无评论

Natural frequency ratio effect on 2 DOF flow induced vibration of cylindrical structures

Natural frequency ratio effect on 2 DOF flow induced vibrati...

引用

26th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013

作者： Han, Xiangxi Zhao, Chengbi Tang, Youhong Chen, Xiaoming Lin, Wei Sammut, Karl Department of Naval Architecture and Ocean Engineering School of Civil Engineering and Transportation South China University of Technology Guangdong 510641 China Centre for Maritime Engineering Control and Imaging School of Computer Science Engineering and Mathematics Flinders University SA 5042 Australia China Ship Architecture Design and Research Institute Co. Ltd. Beijing 100024 China

ISBN: (纸本)9783642539619

In this study, the vortex-induced vibration (VIV) of a circular cylinder at the low Reynolds number of 200 is simulated by a transient coupled fluid-structure interaction numerical model using the combination of FLUENT and ANSYS platforms. Considering VIV with low reduced damping parameters, the trend of the lift coefficient, the drag coefficient and the displacement of the cylinder are analyzed under different oscillating frequencies of the cylinder. The frequency ratio α is a very important parameter, which has been intensively investigated here. The typical nonlinear phenomena of lockedin, beat and phases switch can be captured successfully. The evolution of vortex shedding from the cylinder and the trajectory of the 2 DOF case with varied frequency ratio is also discussed. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Vortex shedding

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：