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作者： Christov, Nicolai D. Konstantinov, Mihail M. Petkov, Petko Hr. Laboratory of Automatics Computer Engineering and Signal Processing Lille University of Science and Technology Villeneuve d'Ascq59655 France Department of Mathematics University of Architecture Civil Engineering and Geodesy Sofia1046 Bulgaria Department of Systems and Control Technical University of Sofia Sofia1000 Bulgaria

New local perturbation bounds for the continuous-time H∞-control problem are obtained, which are nonlinear functions of the data perturbations and are tighter than the existing condition number-based local bounds. These nonlinear local bounds are then incorporated into nonlocal perturbation bounds which are less conservative than the existing nonlocal perturbation estimates for the H∞-control problem. Copyright © 2014, Kent State University.

关键词： Riccati equations

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Designing an Intelligent System for Traffic Management

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通讯和计算机（中英文版） 2015年第3期12卷 123-127页

作者： Maha Rezzai Wafaa Dachry Fouad Moutaouakkil Hicham Medromi Systems Architecture Team Laboratory of Computer System and Renewable Energy University Hassan H Casablanca ENSEMCasablanca 20200 Morocco Laboratory of Mechanical Engineering Industrial Management and Innovation (IMMII) University Hassan I FST SettatMorocco

Traffic congestion has become a serious problem that arises in our cities; this is due to rapid population growth, the rapid increase in the number of cars. Therefore, there is an infernal traffic jams. It is in this light, it is imperative to eliminate or at least reduce traffic congestion through the adoption of the policy of ITS (intelligent transport systems). The objective of this paper is to propose a study on the problem of congestion in cities, by reducing traffic congestion.

关键词：智能系统交通管理交通拥堵设计智能交通系统汽车数量交通堵塞城市

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A multi-lead ECG classification based on random projection features

A multi-lead ECG classification based on random projection f...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Iva Bogdanova Francisco Rincón David Atienza Embedded Systems Laboratory (ESL) Ecole Polytechnique Fédérale de Lausanne Switzerland Department of Computer Architecture and Automation Complutense University of Madrid Spain

This paper presents a novel method for classification of multi-lead electrocardiogram (ECG) signals. The feature extraction is based on the random projection (RP) concept for dimensionality reduction. Furthermore, the classification is performed by a neuro-fuzzy classifier. Such a model can be easily implemented on portable systems for practical applications in both health monitoring and diagnostic purposes. Moreover, the RP implementation on portable systems is very challenging featuring both energy efficiency and feasibility. The proposed method is tested on a 12-lead ECG database consisting of 20 beats during normal sinus rhythm, 20 beats with myocardial infarction and 20 beats showing cardiomyopathy for 60 different subjects. The experiments give a recognition rate of 100% for a small number of RP coefficients (only 25), i.e. after a considerable dimensionality reduction of the input ECG signal. The results are very promising, not only from the classification performance point of view, but also while targeting a low-complexity feature extraction in terms of computation requirements and memory usage for real-time operation on a wireless wearable sensor platform.

关键词： Electrocardiography Feature extraction Databases Pragmatics Wireless sensor networks Wireless communication computer architecture

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Avoiding store misses to fully modified cache blocks

Avoiding store misses to fully modified cache blocks

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： S. Hu L. John Networking and Computing Systems Group Freescale Semiconductor Inc. Austin TX USA Laboratory for Computer Architecture University of Texas Austin Austin TX USA

Memory bandwidth limitation is one of the major impediments to high-performance microprocessors. This paper investigates a class of store misses that can be eliminated to reduce data traffic. Those store misses fetch cache blocks whose original data is never used. If fully overwritten by subsequent stores, those blocks can be installed directly in the cache without accessing lower levels of the memory hierarchy, eliminating the corresponding data traffic. Our results indicate that for a 1 MB data cache, 28% of cache misses are avoidable across SPEC CPU INT 2000 benchmarks. We propose a simple hardware mechanism, the store fill buffer (SFB), which directly installs blocks for store misses, and substantially reduces the data traffic. A 16-entry SFB eliminates 16% of overall misses to a 64 KB data cache, resulting in 6% speedup. This mechanism enables other bandwidth-hungry techniques to further improve system performance

关键词： Bandwidth Microprocessors Hardware Buffer storage Impedance Delay computer networks Laboratories computer architecture System performance

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Design and Experimental Investigation of Trikarenos: A Fault-Tolerant 28nm RISC-V-based SoC

arXiv

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arXiv 2024年

作者： Rogenmoser, Michael Wiese, Philip Forlin, Bruno Endres Gürkaynak, Frank K. Rech, Paolo Menicucci, Alessandra Ottavi, Marco Benini, Luca The Integrated Systems Laboratory ETH Zurich Switzerland The Computer Architecture for Embedded Systems The University of Twente Netherlands The Department of Industrial Engineering The University of Trento Italy The Department of Space Engineering The Delft University of Technology Netherlands The Computer Architecture for Embedded Systems The University of Twente Netherlands The Department of Electronic Engineering The University of Rome Tor Vergata Italy The Integrated Systems Laboratory ETH Zurich Switzerland The Department of Electrical Electronic and Information Engineering The University of Bologna Italy

We present a fault-tolerant by-design RISC-V SoC and experimentally assess it under atmospheric neutrons and 200 MeV protons. The dedicated ECC and Triple-Core Lockstep countermeasures correct most errors, guaranteein... 详细信息

关键词： Fault tolerance

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VersaSens: An Extendable Multimodal Platform for Next-Generation Edge-AI Wearables

IEEE Transactions on Circuits and Systems for Artificial Int...

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IEEE Transactions on Circuits and systems for Artificial Intelligence 2024年第1期1卷 83-96页

作者： Taraneh Aminosharieh Najafi José Angel Miranda Calero Jérôme Thevenot Benjamin Duc Stefano Albini Alireza Amirshahi Hossein Taji María José Belda Beneyto Antonio Affanni David Atienza Embedded Systems Laboratory (ESL) Institute of Electrical and Micro Engineering École Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Polytechnic Department of Engineering and Architecture Udine Italy Computer Architecture and Automation Department Universidad Complutense de Madrid Madrid Spain

The transition of healthcare towards digitalization is closely related to the advancement of health-related technologies, including wearable sensors and edge computing. In this paper, we present VersaSens, a versatile and customizable platform concept and its real implementation as a tool to boost research in wearable sensors. The platform embodies the core attributes of the VersaSens concept: versatility, flexibility, and extendability across multiple aspects of hardware, software, and processing components. It features a modular design, consisting of sensor, processor, and co-processor modules, allowing for various configurations. To evaluate the efficiency of the platform, we tested three use cases: cough monitoring, heartbeat classification and epileptic seizure detection. In all cases, the results indicate that the platform effectively executes the applications, achieving low energy consumption. In particular, our findings indicates that the integration of a domain-specific edge-AI co-processor [i.e., HEEP ocrates (Machetti et al., 2024)] equipped with several hardware accelerators further improved the overall execution time and energy consumption of the system. These results demonstrate the potential of VersaSens to effectively support a diverse range of edge-AI applications and configurations, thereby providing a robust foundation for the research and development of novel smart wearable sensor systems.

关键词： Sensors Wearable devices Artificial intelligence Wearable sensors Medical services Intelligent sensors Monitoring

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A generic agent-oriented model used fordesigning a collaborative information system

A generic agent-oriented model used fordesigning a collabora...

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World Conference on Complex systems (WCCS)

作者： Sara Maalal Malika Addou Wafaa Dachry Brahim Aghezzaf Team of Systems'Architecture Laboratory of computing Systems and Renewable Energy National and High School of Electricity and Mechanic Casablanca Morocco Department of Mathematics and Computer Faculty of sciences Hassan II University Casablanca Morocco

Faced with new environmental constraints, firms decide to collaborate in collective entities and adopt new patterns of behavior. So, this firms' collaboration becomes an unavoidable approach. This collaboration can be represented by many agents collaboration within a multi agent system. Indeed, agent technology is a software paradigm that permits to implement large and complex distributed applications [1]. In order to assist analyzing, conception and development or implementation phases of multi-agent systems, we've tried to present a practical application of a generic and scalable method of a MAS with a component-oriented architecture and agent-based approach that allows MDA to generate source code from a given model. We have designed a generic class diagram as a class meta-model of different agents of a MAS. Then we have applied it on a collaborative platform based on MAS supply chain which ensures cooperation and information logging and sharing between partners in real time. We have finally generated the model source code developed using an open source tool called AndroMDA. This agent-based and evolutive approach enhances the modularity and genericity developments and promotes their reusability in future developments.

关键词： Unified modeling language Collaboration Object oriented modeling Multiagent systems Computational modeling Software Complexity theory

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An Estimate of the Complexity of the Section Finding Problem on Algebraic Surfaces

An Estimate of the Complexity of the Section Finding Problem...

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International Symposium on Computing and Networking (CANDAR)

作者： Shinya Okumura Koichiro Akiyama Tsuyoshi Takagi Information Security Laboratory Institute of Systems Information Technologies and Nanotechnologies Fukuoka Japan Computer Architecture & Security Systems Laboratory Toshiba Corporation R&D Center Kawasaki Japan Institute of Mathematics for Industry Kyushu University Fukuoka Japan

ISBN: (纸本)9781509026562

Researching post-quantum cryptography has been an important task in cryptography. The section finding problem on algebraic surfaces (AS-SFP) is considered to be intractable also after building quantum computers. Thus AS-SFP is used as a basis of the security of the Algebraic Surface Cryptosystem (ASC), which is a candidate of post-quantum cryptosystems, and it is important for designing parameters which make ASC secure to estimate the complexity of AS-SFP. Solving AS-SFP is reduced to solving certain multivariate equation systems (section equation systems) of high degrees, and one can solve such equation systems by using the Grobner basis technique. Although estimating the complexity of computing a Grobner basis associated with an equation system is difficult in general, it becomes easy if the equation system is semi-regular. In this paper, we experimentally estimate the complexity of AS-SFP. From our experimental results, although we see that section equation systems do not become semi-regular in most cases for small parameters, we can infer parameters closely related to the difficulty of computing Grobner bases associated with section equation systems. According to our inference, we estimate the complexity of AS-SFP and parameters which make ASC 128-bit security against the attack by the Grobner basis technique. We also consider a brute-force attack against AS-SFP and conjecture that the brute-force attack is more efficient than the attack by the Grobner basis technique. Finally, we estimate parameters and sizes of public keys such that ASC has 128-bit security against the brute-force attack. Its size (876 bits) is much smaller than sizes of public keys in other efficient candidates of PQC.

关键词： Complexity theory Elliptic curve cryptography Quantum computing computers

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VirtualQueue: A technique for packet voice stream reconstruction

VirtualQueue: A technique for packet voice stream reconstruc...

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IEEE International Conference on Multimedia Computing and systems (ICMCS)

作者： N. Figueira J. Pasquale Bay Architecture Lab Nortel Networks Limited Santa Clara CA USA Computer Systems Laboratory Department of Computer Science and Engineering University of California San Diego La Jolla CA USA

Statistical multiplexing in packet-switched networks creates problems for packetized voice streams by introducing variable delays on delivered packets. The resulting jitter needs to be filtered so that received voice packets can be reconstructed as a continuous stream at the receiver. One common approach to reconstruction is to play back the receiver voice data after a delay offset from the departure time at the source of the packet stream. While the added delay helps filter jitter, one cannot introduce too much delay, otherwise, interactiveness suffers. This paper presents a new technique to find the necessary delay offset (or play-back delay) to recreate the original voice data stream. This technique gives the user control over the fraction of packets that should arrive in time to be played back so that the added play-back delay can be effectively minimized.

关键词： Delay effects Delay estimation Added delay Jitter Upper bound Streaming media Humans Degradation NASA Laboratories

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UCC 2013: Message from the conference organization chairs

Proceedings - 2013 IEEE/ACM 6th International Conference on ...

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Proceedings - 2013 IEEE/ACM 6th International Conference on Utility and Cloud Computing, UCC 2013 2013年 xv-xvi页

作者： Buyya, Rajkumar Schill, Alexander Spillner, Josef Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Department of Computer Science Institute for Systems Architecture Technische Universität Dresden Germany Technische Universität Dresden Germany

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