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22nd International Conference on Hybrid Intelligent systems, HIS 2022 and the 18th International Conference on information Assurance and Security, IAS 2022

作者： Karoui, Hend Hamza, Sihem Ayed, Yassine Ben Multimedia Information Systems and Advanced Computing Laboratory MIRACL University of Sfax Sfax Tunisia

ISBN: (纸本)9783031274084

The ElectroCardioGram (ECG) is one of the most used signals for the prediction of heart disease. Lots of research are based on the ECG signal for the detection of cardiac diseases. In this research, we propose a four phases method to the recognition of cardiac disease. The first phase is to remove noise and detect QRS complex using a pass-band filter. In the second phase, we segment the filtered signal. For third phase is to make a fusion of three types of characteristics such as Zero Crossing Rate (ZCR), entropy and cepstral coefficients. Those features extracted considered as input in the next step which is the combination between Convolutional Neural Network (CNN) and Long Short-Term Memory (LSTM) proposed for multi-class classification of the ECG signal into five classes: Normal beat (N), Left bundle-branch block beat (L), Right bundle-branch block beat (R), premature Ventricular contraction (V), and Paced beat (P). The proposed model was evaluated using the MITBIH arrhythmia database and achieve an accuracy equal to 95.80%. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Long short-term memory

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Automatic hybrid approach for lip POI localization: Application for Lip-reading System

Automatic hybrid approach for lip POI localization: Applicat...

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1st International Conference on information and Communication Technology and Accessibility, ICTA 2007

作者： Werda, Salah Mahdi, Walid Hamadou, Abdelmajid Ben MIRACL: Multimedia Information Systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

ISBN: (纸本)9789973879141

Automatic Lip-reading system is one of the different assistive technologies for hearing impaired or elderly people. We can imagine, for example, a dependent person ordering a machine with an easy lip movement or by a simple visemes (visual phoneme) pronunciation. The need for an automatic lip-reading system is ever increasing. The lip-reading system is decomposed in three subsystems, first we have the lip localization system, which localizes the lips in the digital input, then there is the feature extracting system, and finally we have the classification system, which maps feature vectors to visemes. The major difficulty of the lip-reading system is the extraction of the visual speech descriptors. In fact, to ensure this task it is necessary to carry out an automatic localization and tracking of the labial gestures. We present in this paper a new automatic approach for lip POI localization on a speaker's face based on the color information of mouth and a geometrical model of lips. This hybrid solution makes our method more tolerant to noise and artefacts in the image. The algorithm works in natural condition and experiments revealed that our lip POI localization approach for lip-reading purpose is possible using the proposed approach.

关键词： Audition

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Automatic lip localization and feature extraction for lip-reading

Automatic lip localization and feature extraction for lip-re...

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2nd International Conference on Computer Vision Theory and Applications, VISAPP 2007

作者： Werda, Salah Mahdi, Walid Hamadou, Abdelmajid Ben MIRACL : Multimedia Information systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

In recent year, lip-reading systems have received a great attention, since it plays an important role in human communication with computer especially for hearing impaired or elderly people. The need for an automatic lip-reading system is ever increasing. Today, extraction and reliable analysis of facial movements make up an important part in many multimedia systems such as videoconference, low communication systems, lip- reading systems. We can imagine, for example, a dependent person ordering a machine with an easy lip movement or by a simple syllable pronunciation. We present in this paper a new approach for lip localization and feature extraction in a speaker's face. The extracted visual information is then classified in order to recognize the uttered viseme (visual phoneme). To check our system performance we have developed our Automatic Lip Feature Extraction prototype (ALiFE). Experiments revealed that our system recognizes 70.95 % of French digits uttered under natural conditions.

关键词： Feature extraction

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ALiFE: Automatic lip feature extraction: A new approach for speech recognition application 2

ALiFE: Automatic lip feature extraction: A new approach for ...

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2nd International Conference on information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Werda, Salah Mahdi, Walid Tmar, Mohamed Hamadou, Abdelmajid Ben MIRACL Multimedia Information Systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

ISBN: (纸本)0780395212

Actually several domains 'general public' are concerned by the utility of visual speech information such as e-learning, Tele-assistance, Human-Machine interaction, etc. The visual information helpfulness is more imperative among people with special needs. We can imagine for example, a dependant people ordered his machine with an easy lip movement or by a simple syllable pronunciation. More than, hard of hearing people normally compensate for their hearing problems by lip-reading as well as listening to the person they are talking to. Therefore, it's very important to create an automatic lip-reading system that resolve partially people hearing problem. We presents in this paper a new hybrid approach named ALiFE to automatically localize lipfeature points in the speaker's face and to carry out a spatial-temporal tracking of these points. ALiFE prototype is evaluated with a multiple speakers under natural conditions. In order to approve our lipfeature extraction approach, we have created a specific audio-visual corpus. The final results show the diferent configuration of the mouth through visemes. Later on these visemes will be associated to relatively precise physical measures. © 2006 IEEE.

关键词： Audition

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Continual Reinforcement Learning for Digital Twin Synchronization Optimization

arXiv

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arXiv 2025年

作者： Tong, Haonan Chen, Mingzhe Zhao, Jun Hu, Ye Yang, Zhaohui Liu, Yuchen Yin, Changchuan The Beijing Key Laboratory of Network System Architecture and Convergence The Beijing Advanced Information Network Laboratory Beijing University of Posts and Telecommunications Beijing China Singapore The Department of Electrical and Computer Engineering Frost Institute for Data Science and Computing University of Miami Coral GablesFL33146 United States The Department of Industrial and Systems Engineering University of Miami Coral GablesFL33146 United States The College of Information Science and Electronic Engineering Zhejiang University Zhejiang Hangzhou310027 China The Department of Computer Science North Carolina State University RaleighNC27695 United States The Beijing Key Laboratory of Network System Architecture and Convergence China The Beijing Advanced Information Network Laboratory Beijing University of Posts and Telecommunications Beijing100876 China

This article investigates the adaptive resource allocation scheme for digital twin (DT) synchronization optimization over dynamic wireless networks. In our considered model, a base station (BS) continuously collects factory physical object state data from wireless devices to build a real-time virtual DT system for factory event analysis. Due to continuous data transmission, maintaining DT synchronization must use extensive wireless resources. To address this issue, a subset of devices is selected to transmit their sensing data, and resource block (RB) allocation is optimized. This problem is formulated as a constrained Markov process (CMDP) problem that minimizes the long-term mismatch between the physical and virtual systems. To solve this CMDP, we first transform the problem into a dual problem that refines RB constraint impacts on device scheduling strategies. We then propose a continual reinforcement learning (CRL) algorithm to solve the dual problem. The CRL algorithm learns a stable policy across historical experiences for quick adaptation to dynamics in physical states and network capacity. Simulation results show that the CRL can adapt quickly to network capacity changes and reduce normalized root mean square error (NRMSE) between physical and virtual states by up to 55.2%, using the same RB number as traditional methods. © 2025, CC BY-NC-SA.

关键词： Markov processes

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Hand localization and fingers features extraction: Application to digit recognition in sign language

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10th International Conference on Intelligent Data Engineering and Automated Learning, IDEAL 2009

作者： Jmaa, A. Ben Mahdi, W. Jemaa, Y. Ben Hamadou, A. Ben Multimedia InfoRmation Systems and Advanced Computing Laboratory Tunisia Signal and System Research Unit Tunisia

ISBN: (纸本)3642043933

We present in this paper an approach of hand gesture analysis that aims at recognizing a digit. The analysis is based on extracting a set of features from a hand image and then combining them by using an induction graph. The most important features we extract from each image are the fingers locations, their heights and the distance between each pair of fingers. Our approach consists of three steps: (i) Hand localization, (ii) fingers extraction and (iii) features identification and combination to digit recognition. Each input image is assumed to contain only one hand with black background, thus we apply a classifier based on one skin color to identify the skin pixels. In the finger extraction step, we attempt to remove all the hand components except the fingers, this process is based on the hand anatomy properties. The final step is based on histogram representation of the detected fingers which results in the features identification, which results in the digit recognition. The approach is invariant to scale, rotation and translation of the hand. Some experiments have been undertaken to show the effectivness of the proposed approach. © 2009 Springer Berlin Heidelberg.

关键词： Feature extraction

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Structural relevance feedback in XML retrieval

Structural relevance feedback in XML retrieval

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8th International Conference on Flexible Query Answering systems, FQAS 2009

作者： Kamoun Fourati, Inès Tmar, Mohamed Hamadou, Abdelmajid Ben Multimedia Information Systems and Advanced Computing Laboratory High Institute of Computer Science and Multimedia University of Sfax Sfax Tunisia

ISBN: (纸本)3642049567

Contrarily to classical information retrieval systems, the systems that treat structured documents include the structural dimension through the document and query comparison. Thus, the retrieval of relevant results means the retrieval of document fragments that match the user need rather than the whole document. So, the structure notion should be taken into account during the retrieval process as well as during the reformulation. In this paper we propose an approach of query reformulation based on structural relevance feedback. We start from the original query on one hand and the fragments judged as relevant by the user on the other. Structure hints analysis allows us to identify nodes that match the user query and to rebuild it during the relevance feedback step. The main goal of this paper is to show the impact of structural hints in XML query optimization. Some experiments have been undertaken into a dataset provided by INEX to show the effectiveness of our proposals. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： XML

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Query reformulation based on relevance feedback

Query reformulation based on relevance feedback

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8th International Conference on Flexible Query Answering systems, FQAS 2009

作者： Taktak, Imen Tmar, Mohamed Hamadou, Abdelmajid Ben Multimedia Information Systems and Advanced Computing Laboratory High Institute of Computer Science and Multimedia University of Sfax Sfax Tunisia

ISBN: (纸本)3642049567

In a Relevance Feedback process, the query can be reformulated basing on a matrix product of the RSV (Retrieval Status Value) vector and the documents-terms matrix. In such case, the challenge is to determine the most appropriate query that fulfils the retrieval process. In this paper, we present an automatic query reformulation approach based on a dual form of this product matrix which systematically generate as solution the reformulated query. This approach was spread to assure a learning strategy in order to rank the results of an information retrieval system. Some experiments have been undertaken into a dataset provided by TREC and the results show the effectiveness of our approach. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： Search engines

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LMP-GAN: Out-Of-Distribution Detection For Non-Control Data Malware Attacks

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IEEE Transactions on Pattern Analysis and Machine Intelligence 2025年 PP卷 PP页

作者： Wood, David Kapp, David Kebede, Temesgen Hirakawa, Keigo Wuhan University School of Computer Science China Wuhan University National Engineering Research Center for Multimedia Software Hubei Key Laboratory of Multimedia and Network Communication Engineering China Zhongguancun Academy China Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing China Sun Yat-sen University School of Geography and Planning China Mohamed bin Zayed University of Artificial Intelligence United Arab Emirates Chongqing University College of Computer Science China The University of Tokyo Japan RIKEN Center for Advanced Intelligence Project Japan Intelligent Science & Technology Academy Limited CASIC China iFlytek Company Ltd. National Engineering Research Center of Speech and Language Information Processing China Nanyang Technological University College of Computing & Data Science Singapore Henan Academy of Sciences Aerospace Information Research Institute China

Anomaly detection is a common application of machine learning. Out-of-distribution (OOD) detection in particular is a semi-supervised anomaly detection technique where the detection method is trained only on the inlier (in-distribution) samples - unlike the fully supervised variant, the distribution of the outlier samples are never explicitly modeled in OOD detection tasks. In this work, we design a novel GAN-based OOD detection network specifically designed to protect a cyber-physical signal systems from novel Trojan malware called non-control data (NCD) attack that evades conventional malware detection techniques. Inspired in part by the classical locally most powerful (LMP) test in statistical inferences, the proposed LMP-GAN trains the OOD detector (discriminator) by generating OOD samples that are aimed at making maximal alteration to the inlier samples while evading detection. We experimentally compare the results to the state-of-the-art anomaly detection methods to demonstrate the benefits and the appropriateness of the LMP-GAN OOD detector. © 2025 IEEE.

关键词： Malware

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WOW: Self-organizing wide area overlay networks of virtual workstations

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Journal of Grid computing 2007年第2期5卷 151-172页

作者： Ganguly, A. Agrawal, A. Boykin, P.O. Figueiredo, Renato J. Advanced Computing and Information Systems Laboratory University of Florida Gainesville FL 32601 United States

This paper describes WOW, a distributed system that combines virtual machine, overlay networking and peer-to-peer techniques to create scalable wide-area networks of virtual workstations for high-throughput computing. The system is architected to: facilitate the addition of nodes to a pool of resources through the use of system virtual machines (VMs) and self-organizing virtual network links;to maintain IP connectivity even if VMs migrate across network domains;and to present to end-users and applications an environment that is functionally identical to a local-area network or cluster of workstations. We describe IPOP, a network virtualization technique that builds upon a novel, extensible user-level decentralized technique to discover, establish and maintain overlay links to tunnel IP packets over different transports (including UDP and TCP) and across firewalls. We evaluate latency and bandwidth overheads of IPOP and also time taken for a new node to become fully-routable over the virtual network. We also report on several experiments conducted on a testbed WOW deployment with 118 P2P router nodes over PlanetLab and 33 VMware-based VM nodes distributed across six firewalled domains. Experiments show that the testbed delivers good performance for two unmodified, representative benchmarks drawn from the life-sciences domain. We also demonstrate that the system is capable of seamlessly maintaining connectivity at the virtual IP layer for typical client/server applications (NFS, SSH, PBS) when VMs migrate across a WAN. © Springer Science + Business Media B.V. 2007.

关键词： Wide area networks

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