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International Conference on Space Science and Communication (IconSpace)

作者： Alexey N. Glushkov Vladimir P. Litvinenko Boris V. Matveev Oleg V. Chernoyarov Alexandra V. Salnikova Dept. of Radio engineering Voronezh State Technical University Voronezh Russia Dept. of Radio engineering Devices and Antenna Systems National Research University “MPEI” Moscow Russia Dept. of Information Technologies and Computer-aided Design Voronezh State University of Architecture and Civil Engineering Voronezh Russia

We are to introduce the basic fast digital coherent demodulation algorithms for the radio signals with various modulation formats, the ones that require the minimum number of simple arithmetic operations. We are demonstrating how they provide the implementation of the demodulators of the phase-shift keyed and the amplitude-modulated signals. We have determined the expressions for the probabilities of error, and we show that in the case of white noise the considered devices provide noise stability close to the potential. The obtained results have been corroborated by statistical simulation. We are also to illustrate that the suggested algorithms can be practically implemented when supported by the signal processors and modern programmable logic devices.

关键词： Demodulation Signal processing algorithms Noise Phase shift keying Quadrature amplitude modulation Differential phase shift keying Stability analysis

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Design and evaluation of an elliptical patch textile antenna for RFID application and bending consequences

Design and evaluation of an elliptical patch textile antenna...

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International Conference on Electrical Engineering and Information & Communication Technology (ICEEICT)

作者： Shahriar Hasan Shehab Shahreen Hassan Md. Ashif Islam Oni Shuvashis Dey Md. Munir Hassan Department of Electrical and Electronic Engineering American International University-Bangladesh (AIUB) Dhaka Bangladesh Dept. of Electrical and Computer Systems Engineering Monash University Australia Dept. of Naval Architecture and Marine Engineering Military Institute of Science and Technology (MIST) Dhaka Bangladesh

This paper presents a design of an elliptical patch textile antenna having operating frequency at 2.45 GHz for RFID application. The proposed antenna consists of elliptical patch on Dacron fabric (□ r =3) as substrate followed by a partial ground at the back of the substrate. The overall size of the proposed antenna is 45×38 mm 2 . The proposed antenna has a gain of 3.386 dB with VSWR of 1.07. The performance of the proposed antenna is analyzed under four angles of bending. The effect of change in feed length is also focused. The characteristics, low profile and compact size of the antenna depicts as a potential candidate for RFID application. CST Microwave Studio package is used for design and simulation purpose.

关键词： Textiles Substrates Feeds Radiofrequency identification Slot antennas

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Stealthy Attack Detection of controlled ramp meters in freeway networks

Stealthy Attack Detection of controlled ramp meters in freew...

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IEEE Conference on Decision and Control

作者： Charalambos Menelaou Kangkang Zhang Stelios Timotheou Christos G. Panayiotou Thomas Parisini Dept. of Electrical and Computer Engineering KIOS CoE University of Cyprus Dept. of Electrical and Electronic Engineering Imperial College London London U.K. Department of Electronic Systems Aalborg University Denmark Department of Engineering and Architecture University of Trieste Italy

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

The increasing reliance on intelligent transportation systems (ITS) for traffic management has simultaneously heightened the potential for cybersecurity threats. Malicious cyber attacks on such systems can lead to operational inefficiencies, heightened congestion, and compromised safety. This work introduces a stealthy integrity attack tailored for ramp metered freeway systems. The attack model is conceptualized as a closed-loop dynamical system, formulated as an optimization problem based on the Cell Transmission Model. This work further proposes a distributed detection mechanism designed to identify attack residuals, which, by incorporating an adaptive threshold scheme, can detect the presence of an attack. To demonstrate the efficacy of our detection scheme, we present a scenario illustrating its application in freeway road networks.

关键词： Meters Adaptation models Roads Traffic control Safety Dynamical systems Cyberattack Optimization Intelligent transportation systems Resilience

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Navigating Green Transportation in Urban Agglomerations: A Refined Approach for Carbon Emissions Assessment 24

Navigating Green Transportation in Urban Agglomerations: A R...

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24th COTA International Conference of Transportation Professionals: Resilient, Intelligent, Connected, and Lowcarbon Multimodal Transportation, CICTP 2024

作者： Chen, Boyou Wang, Yuanqing Abolarin, Emmanuel Zhang, Shuangyan Liu, Xihao Guo, Hanlin Ren, Baolong Dept. of Built Environment Bartlett School of Planning Univ. College London London United Kingdom Dept. of Transportation Engineering College of Transportation Engineering Chang’an Univ. Xi’an China Dept. of Industrial and Manufacturing Systems Engineering College of Engineering and Computer Science Univ. of Michigan–Dearborn Dearborn United States School of Civil and Transportation Engineering Beijing Univ. of Civil Engineering and Architecture Beijing China Sino-French Engineer School Beihang Univ. Beijing China Dept. of Instrument Science and Technology College of Mechanical Engineering Nanjing Univ. of Science and Technology Nanjing China Sino-Danish College Univ. of Chinese Academy of Sciences Beijing China

ISBN: (数字)9780784485484

ISBN: (纸本)9780784485484

Rapid urbanization has expanded urban agglomerations, escalating carbon emissions from increased transportation needs. These agglomerations have distinct multi-modal transportation systems. Analyzing their carbon footprints and eco-friendly transportation evolution is essential for sustainability. However, research in this domain is limited. This research refines emissions estimation methods, introducing models tailored for urban agglomerations. An evaluation framework for green transportation detailing a computational method for future policies is proposed. The research highlights primary transportation structures and energy consumption. Using a "bottom-up" approach, carbon estimation models for inter- and intra-city transportation are drafted. Assessment indicators are redefined by merging the DPSIR model with urban metrics, forming five main modules with 19 indicators. Using the Regression Random Forest method and focusing on the Yangtze River Delta in China, the link between annual emissions and these indicators is examined, providing a theoretical analysis approach for general cases. © ASCE.

关键词： Carbon sequestration

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The comparative analysis of estimates of the time discontinuous parameter of the random pulse synthesized using Bayesian and maximum likelihood approaches

The comparative analysis of estimates of the time discontinu...

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ELEKTRO

作者： Alexandra V. Salnikova Oleg V. Chernoyarov Leila A. Golpayegani Michal Kuba Dept. of Radio Engineering Devices and Antenna Systems “Moscow Power Engineering Institute” (MPEI) Moscow Russia Dept. of Radio Engineering Devices and Antenna Systems National Research University “Moscow Power Engineering Institute” (MPEI) Moscow Russia Dept. of Telecommunications and Multimedia University of Zilina (ZU) Zilina Slovakia Dept. of Information Technologies and Computer-aided Design Voronezh State University of Architecture and Civil Engineering Voronezh Russia

The algorithms for optimal and quasi-optimal estimation of the arrival time of a Gaussian random pulse with a priori known and inaccurately known duration, which is observed against the background of white Gaussian noise, is synthesized. The comparative analysis of the Bayesian (quasi-Bayesian) and maximum likelihood (quasi-likelihood) measurers of the arrival time is performed. The results of the statistical computer simulation of estimation algorithms are presented.

关键词： Maximum likelihood estimation Bayes methods Time measurement Signal to noise ratio Pulse measurements Signal processing algorithms

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ST-Diary: A multimedia authoring environment for crowdsourced spatio-temporal events 8

ST-Diary: A multimedia authoring environment for crowdsource...

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8th ACM SIGSPATIAL International Workshop on Location-Based Social Networks, LBSN 2015

作者： Ahmad, Akhlaq Afyouni, Imad Murad, Abdullah Rahman, Md. Abdur Rehman, Faizan Ur Sadiq, Bilal Basalamah, Saleh Wahiddin, Mohamed Ridza Kulliyah of Information and Communication Technology International Islamic University Makkah Saudi Arabia College of Engineering and Islamic Architecture Umm Al Qura University Makkah Saudi Arabia KACST GIS Technology Innovation Center Umm Al Qura University Makkah Saudi Arabia Innovation and Entrepreneurship Institute Umm Al Qura University Malaysia College of Computer and Information Systems Umm Al Qura University Makkah Saudi Arabia Dept. of Computer Science LIG University of Grenoble Alpes France

ISBN: (纸本)9781450339759

The intensive use of social media through mobile devices has leveraged the development of digital diary applications that keep track of social events as well as geotagged multimedia content. In a large crowd where users with cultural diversity perform spatiotemporal activities, such geotagged multimedia content facilitates users' navigation through points of interest (POI) based on their preferences. This work presents a crowdsourced geo-spatial multimedia data aggregation tool that allows users to develop diary chapters relevant to forthcoming users' spatio-temporal activities. Our proposed solution provides users with the ability to add POIs through an authoring environment with multiple dimensions, such as spatio-temporal filters, multimedia categories, and event types. Specific application domains such as emergency situations, leisure trips, journalism, and tourism can take benefit of this technique. This authoring environment also visualizes geo-spatial multimedia content for collocated points of interest (CPOI) with moving users' timelines. We plan to integrate our proposed authoring environment as a proof of concept into our existing large-scale crowdsourcing environment that is envisioned to support millions of users during the Hajj 2015 event.

关键词： Crowdsourcing

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Simulation of High-Performance Memory Allocators

Simulation of High-Performance Memory Allocators

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Euromicro Symposium on Digital System Design

作者： Jose L. Risco-Martín J. Manuel Colmenar David Atienza J. Ignacio Hidalgo Dept. of Computer Architecture and Automation Complutense University of Madrid Madrid Spain C.E.S. Felipe II Complutense University of Madrid Aranjuez Spain Embedded Systems Laboratory (ESL) EPFL Lausanne Switzerland

Current general-purpose memory allocators do not provide sufficient speed or flexibility for modern high-performance applications. To optimize metrics like performance, memory usage and energy consumption, software engineers often write custom allocators from scratch, which is a difficult and error-prone process. In this paper, we present a flexible and efficient simulator to study Dynamic Memory Managers (DMMs), a composition of one or more memory allocators. This novel approach allows programmers to simulate custom and general DMMs, which can be composed without incurring any additional runtime overhead or additional programming cost. We show that this infrastructure simplifies DMM construction, mainly because the target application does not need to be compiled every time a new DMM must be evaluated. Within a search procedure, the system designer can choose the "best" allocator by simulation for a particular target application. In our evaluation, we show that our scheme will deliver better performance, less memory usage and less energy consumption than single memory allocators.

关键词： Memory management Resource management Energy consumption Dynamic scheduling Software Computational modeling Algorithm design and analysis

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Free Roll Decay Modeling of a Trimaran Based on Least Square Support Vector Machine

Free Roll Decay Modeling of a Trimaran Based on Least Square...

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OCEANS Conference

作者： Jinlong Li Songlin Yang Shuo Pang National Key Lab of AUV Technology Harbin Engineering University School of Naval Architecture and Ocean Engineering Jiangsu University of Science and Technology Dept. of Electrical Computer Software Systems Engineering Embry-Riddle Aeronautical University

ISBN: (纸本)9781467308298

A trimaran is a multihulled boat consisting of a main hull and two smaller outrigger hulls, attached to the main hull with lateral struts. There have been many studies highlighting that a trimaran takes many advantages over other types of hulls especially the roll performance, because of the greater resistance to rolling that the outrigger hulls offer. In order to study the rolling motion of a trimaran, an accurate roll motion model is needed. The rolling motion of a trimaran is inherently nonlinear due to both nonlinearities in the restoring moment and damping moment. This paper presents an estimation method to predict the linear and nonlinear roll damping parameters based on free roll decay experiments of a trimaran, whose outrigger hulls are movable both along the longitudinal and transverse direction. The estimation method is based on least square support vector regression (LS-SVR) theory. In order to verify the performance of this new estimation method, the least square (LS) estimation method is also applied to identify the parameters. Both methods show satisfying performances, however models generated by LS-SVR shows less accumulated errors than models generated by LS.

关键词： Trimaran Free roll decay Support vector regression Least square

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The DEVStone Metric: Performance Analysis of DEVS Simulation Engines

arXiv

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arXiv 2023年

作者： Cárdenas, Román Henares, Kevin Arroba, Patricia Risco-Martín, José L. Wainer, Gabriel A. Integrated Systems Laboratory Universidad Politécnica de Madrid Madrid Spain Dept. of Systems and Computer Engineering Carleton University OttawaON Canada Dpt. of Computer Architecture and Automation Universidad Complutense de Madrid Madrid Spain Center for Computational Simulation Universidad Politécnica de Madrid Madrid Spain

The DEVStone benchmark allows us to evaluate the performance of discrete-event simulators based on the DEVS formalism. It provides model sets with different characteristics, enabling the analysis of specific issues of simulation engines. However, this heterogeneity hinders the comparison of the results among studies, as the results obtained on each research work depend on the chosen subset of DEVStone models. We define the DEVStone metric based on the DEVStone synthetic benchmark and provide a mechanism for specifying objective ratings for DEVS-based simulators. This metric corresponds to the average number of times that a simulator can execute a selection of 12 DEVStone models in one minute. The variety of the chosen models ensures we measure different particularities provided by DEVStone. The proposed metric allows us to compare various simulators and to assess the impact of new features on their performance. We use the DEVStone metric to compare some popular DEVS-based simulators. © 2023, CC BY-SA.

关键词： Discrete event simulation

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Dynamic Adaptation Gain Design and Tuning for Threat Discrimination

Dynamic Adaptation Gain Design and Tuning for Threat Discrim...

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IEEE Conference on Decision and Control

作者： Kangkang Zhang Kaiwen Chen Marios M. Polycarpou Thomas Parisini Dept. of Electrical and Electronic Engineering Imperial College London London U.K. Dept. of Electrical and Computer Engineering KIOS Research and Innovation Center of Excellence University of Cyprus Nicosia Cyprus Department of Electronic Systems Aalborg University Denmark Department of Engineering and Architecture University of Trieste Italy

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

Considering potential threats to cyber-physical systems such as component faults and stealthy cyber-attacks, an adaptive observer-based threat discrimination method is proposed for identifying the occurring threat type. Typically, stealthy attacks have only weak effects easily obscured by disturbances on the system outputs. To solve this problem, a parameter adaptation algorithm based on a newly designed dynamic adaptive gain generator is proposed, aiming at improving the sensitivity of the adaptive threat discrimination scheme to potential threats. Only the strictly positive real condition of the proposed gain generator sufficiently ensures the stability of the adaptive observer error system. A moment-matching method is then developed to determine the proper parameters of the gain generator, allowing for the improvement of the sensitivity of the threat discriminators. A numerical example to demonstrate the effectiveness of the proposed methodology is presented.

关键词： Fault diagnosis Sensitivity Adaptive systems Heuristic algorithms Observers Cyber-physical systems Generators Cyberattack Tuning Numerical stability

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