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International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： P.T. Antonov D.G. Razsadov Computer Science and Engineering Dpt. TU Vama Bulgaria

In the majority of analytical and imitation models analyzing the processes of communication networks functioning, input streams are associated with the well known Poisson's model, describing the most unfavorable case of stationary random streams. In practice the input streams are characterized mainly with strong nonstationary processes, impacting the final results of modeling to a significant degree. Having this in mind this report presents an input stream model for simulation modeling and analysis of communication networks.

关键词： Communication networks Analytical models Telecommunication traffic Traffic control computer science Fractals Page description languages

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Context-sensitive content representation for static document

Context-sensitive content representation for static document

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Asia-Pacific Conference on Software engineering

作者： W.C. Chu Y.W. Chen J.N. Chen Dpt. of Computer Science and Information Engineering Tunghai University Taiwan Dpt. of Engineering Science National Cheng Kung University Taiwan

Due to the convenience of pervasive information environment, many people use various computing devices to perform plenty kinds of tasks. In the field of education, there are various applications to facilitate learner, especially for e-learning. However, some computing devices suffer from the limited resources and cannot accept rich information content. Therefore, the information content has to be tailored into different kinds of presentation depending on the types of computing devices. Context sensitivity is an application software system's ability to sense and analyze context from various sources. In this paper, we aim to customize static documents using context-sensitive middleware (CSM) to sense the computing device, and then using the agent-based parser to provide suitable content representation dynamically.

关键词： Application software Electronic learning Personal digital assistants Pervasive computing Middleware Embedded computing Web pages computer science computer science education Mobile computing

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Semantic web access prediction using WordNet

Semantic web access prediction using WordNet

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International Conference on Web engineering, ICWE 2009 Doctoral Consortium - In Conjunction with ICWE 2009

作者： Hapalova, Lenka Dpt. of Computer Science and Engineering Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nám. 13 121 35 Prague 2 CZ Czech Republic

The user observed latency of retrieving Web documents is one of limiting factors while using the Internet as an information data source. Prefetching became important technique to reduce the average Web access latency. Existing prefetching methods are based predominantly on URL graphs. They use the graphical nature of HTTP links to determine the possible paths through a hypertext system. Although the URL graph-based approaches are effective in the prefetching of frequently accessed documents, few of them can pre-fetch those URLs that are rarely visited. In our paper we aim to propose a new prefetching algorithm that would increase the efficiency of Web prefetching and that will embody the new demands for Web personalisation and Web search assistance. The aim of the research is to design a system for web page prefetching. The system should use user's link path history in combination with the semantic path history. To enable this, semantically annotated web pages are necessary. We cannot rely on the web documents' creators thus one part of the work must be the design and implementation of simple annotator based on WordNet just for purposes of our research.

关键词： Hypertext systems

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Develop a new mobile-optimized remote experiment application for mobile learning 123

Develop a new mobile-optimized remote experiment application...

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123rd ASEE Annual Conference and Exposition

作者： Lan, Qianlong Wang, Ning Chen, Xuemin Song, Gangbing Parsaei, Hamid R. Texas Southern University Dpt. of Computer Science United States Texas Southern University Department of Electrical and Computer Engineering United States United States Texas A and M University Department of Mechanical Engineering United States

As Mobile Learning (M-Learning) has had a great impact on online education, more and more mobile applications are designed and developed for the M-Learning. In this paper, a novel mobile-optimized application architecture is proposed to integrate the remote laboratory into mobile environment for the M-Learning. With this mobile optimized application architecture, the remote experiment applications can use a common codebase to deploy native-like applications on many different mobile platforms (such as, iOS, Android, Window Mobile, etc.). To demonstrate the effectiveness of proposed new architecture for M-Learning, an innovative remote networked Smart Vibration Platform (SVP) experiment is successfully implemented based on this new application architecture. This remote SVP experiment has been used in several engineering courses. © American Society for engineering Education, 2016.

关键词： E-learning

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Camera calibration method for an automotive safety driving system

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Journal of Institute of Control, Robotics and Systems 2015年第7期21卷 621-626页

作者： Park, Jong-Seop Kim, Gi-Seok Roh, Soo-Jang Cho, Jae-Soo Dpt. of Computer Science and Engineering Korea University of Technology and Education Korea Republic of

This paper presents a camera calibration method in order to estimate the lane detection and inter-vehicle distance estimation system for an automotive safety driving system. In order to implement the lane detection and vision-based inter-vehicle distance estimation to the embedded navigations or black box systems, it is necessary to consider the computation time and algorithm complexity. The process of camera calibration estimates the horizon, the position of the car's hood and the lane width for extraction of region of interest (ROI) from input image sequences. The precision of the calibration method is very important to the lane detection and inter-vehicle distance estimation. The proposed calibration method consists of three main steps: 1) horizon area determination;2) estimation of the car's hood area;and 3) estimation of initial lane width. Various experimental results show the effectiveness of the proposed method. © ICROS 2015.

关键词： Vehicle safety

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Deployment of a LoRa-based Network and Web Monitoring Application for a Smart Farm

Deployment of a LoRa-based Network and Web Monitoring Applic...

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Workshop on Metrology for Industry 4.0 and IoT

作者： Mohamed Saban Otman Aghzout Alfredo Rosado-Muñ oz Dpt. Electronic Engineering ETSE School of Engineering Burjassot Spain Dpt. Computer Science ENSA School of Engineering Tetouan Morocco

The integration of Industry 4.0 technologies in agriculture will reduce the increasing challenges of agricultural process around the globe. The real-time farm management with high degree of automation will greatly improve productivity, agri-food supply chain efficiency and food safety. This paper describes a fully customized LoRa-based IoT system that aims for a low-cost, low power and wide range wireless sensor network targeted for smart farms. The presented system integrates already existing Programmable Logic Controllers (PLC) typically used to control multiple processes and devices such as water pumps, certain machinery, etc. along with a newly developed network of wireless LoRA sensors distributed over the farm. A Telegram bot is also included as novelty for automated user communication via this mobile phone messaging application. The network structure was deployed and tested. The developed integrated system also includes a cloud-based monitoring application to provide remote visualization and control for all the farming environment.

关键词： Smart agriculture Wireless communication Temperature sensors Temperature measurement Wireless sensor networks Process control Water pumps

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A robust Carrier Frequency and Timing Offset Estimation in Inter-UAV OFDM Communication Links

A robust Carrier Frequency and Timing Offset Estimation in I...

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International Multi-Topic ICT Conference (IMTIC)

作者： Farzana Kulsoom Iraj Fatima Hassan Nazeer Chaudhry Aneeqa Gul Adeel Akram Telecommunication Engineering Dpt. University of Engineering and Technology Taxila Pakistan Computer Science Dpt. Barani Institute of Technology Rawalpindi Pakistan

The UAV-mounted base station has been integrated into 5G and beyond to provide communication in an emergency when conventional systems fail due to some reason. Moreover, it is also used in coverage enhancement and for other strategic purposes. In this work, we have considered a MIMO-OFDM based UAV system that is inclined to fast-fading channels due to the continuous motion of UAVs. Due to the mobility of UAVs, there is a frequency and timing offset which must be estimated for proper and seamless communication. For that purpose, we have proposed a data-aided maximum likelihood-based scheme that efficiently estimates the carrier frequency and timing offset. Results show that our algorithm outperforms the state-of-the-art system in terms of MSE.

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Development of an ubiquitous decision support system for clinical guidelines using MDA

Development of an ubiquitous decision support system for cli...

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19th International Conference on Advanced Information Systems engineering, CAiSE 2007

作者： Porres, Ivan Domínguez, Eladio Pérez, Beatriz Rodríguez, Áurea Zapata, María A. Department of Computer Science Åbo Akademi University Joukahaisenkatu 3-5 B Turku FIN-20520 Finland Dpt. of Computer Science and Systems Engineering University of Zaragoza Pedro Cerbuna 12 E-50009 Zaragoza Spain

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Subdividing triangular and quadrilateral meshes in parallel to approximate curved geometries

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Procedia engineering 2017年 203卷 310-322页

作者： A. Gargallo-Peiró G. Houzeaux X. Roca Computer Applications in Science and Engineering Dpt. Barcelona Supercomputing Center-Centro Nacional de Supercomputación C/ Jordi Girona 29 Barcelona 08034 Spain

A parallel distributed approach to refine a mesh while preserving the curvature of a target geometry is presented. Our approach starts by generating a coarse linear mesh of the computational domain. Second, the former coarse mesh is curved to match the curvature of the target geometry. Then, the curved mesh is partitioned and the subdomain meshes are sent to the slaves. Finally, the curved elements are uniformly subdivided in parallel targeting the geometry approximated by the curved mesh. The result is a distributed finer linear mesh featuring improved geometric accuracy. The key ingredient of our implementation is to approximate the target geometry as a linear mesh equipped with an elemental field corresponding to an element-wise polynomial geometry representation. Thus, the distribution of the curved geometry is equivalent to partitioning the linear mesh and sending the subdomain meshes and the elemental fields to the slaves. The main application of the obtained finer linear mesh is to compute in parallel steady state flow solutions on real topographies. The qualitative results show that for 2D and 3D steady state flow solutions, on real and synthetic topographies, our parallel subdivision approach mitigates the artificial artifacts that might appear with standard straight-sided subdivision methods. We also check the parallel performance of the implementation by performing a weak scalability test in 2D.

关键词： Mesh subdivision Mesh multiplication Parallel mesh generation Parallel computing High-order mesh

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Annotations Time Shift: A Key Parameter in Evaluating Musical Note Onset Detection Algorithms

Annotations Time Shift: A Key Parameter in Evaluating Musica...

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IEEE Workshop on applications of Signal Processing to Audio and Acoustics

作者： Mina Mounir Peter Karsmakers Toon van Waterschoot Dpt. of Electrical Engineering KU Leuven Leuven Belgium Dpt. of Computer Science KU Leuven GEEL Belgium

Musical note onset detection is a building component for several MIR related tasks. The ambiguity in the definition of a note onset and the lack of a standard way to annotate onsets, introduce differences in datasets labeling, which in turn makes evaluations of note onset detection algorithms difficult to compare. This paper gives an overview of the parameters influencing the commonly used onset detection evaluation measure, i.e. the F1-score, pointing out a consistently missing parameter which is the overall time shift in annotations. This paper shows how crucial this parameter is in making reported F1-scores comparable among different algorithms and datasets, achieving a more reliable evaluation. As several MIR applications are concerned with the relative location of onsets to each other and not their absolute location, this paper suggests to include the overall time shift as a parameter when evaluating the algorithm performance. Experiments show a strong variability in the reported F1-score and up to 50% increase in the best-case F1-score when varying the overall time shift. Optimizing the time shift turns out to be crucial when training or testing algorithms with datasets that are annotated differently (e.g. manually, automatically, and with different annotators) and especially when using deep learning algorithms.

关键词： Annotations Labeling Signal processing algorithms Music Transient analysis Multiple signal classification Training

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