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The mapping between TFD and IEEE 802.11 user priorities and access categories 32nd

The mapping between TFD and IEEE 802.11 user priorities and ...

32nd International Symposium on computer and Information Sciences, ISCIS 2018 Held at the 24th IFIP World computer Congress, WCC 2018

作者： Chodorek, Robert R. Chodorek, Agnieszka Department of Telecommunications AGH University of Science and Technology Al. Mickiewicza 30 Krakow30-059 Poland Faculty of Electrical Engineering Automatic Control and Computer Science Kielce University of Technology Al. Tysiaclecia P.P. 7 Kielce25-314 Poland

ISBN: (纸本)9783030008390

The modern approach to the quality of service (QoS) claims that problems of assurance of the required QoS parameters may occur not only in core networks (as the classic approach assumes), but also in access networks (including local networks, or LANs), especially if the access network is of broadcast type, such as the IEEE 802.11 wireless LAN. In the case of broadcast LANs, QoS assurance in the network layer should be associated with the QoS assurance in the data link layer. The aim of this paper is to propose such an association between the 802.11 QoS assurance and the QoS assurance based on the Traffic Flow Description (TFD) option of the IP protocol. The TFD was specified by the Authors in the IETF’s working document (Internet Draft), and was intended to describe Internet traffic for the purpose of dynamic resource reservations. The TFD-based QoS assurance offers dynamic reservations for micro-flows (single data real-time streams or non-real-time flows). The proposed method associates TFD and 802.11 QoS architectures in a way similar to the association of the DiffServ architecture and the 802.11 QoS, i.e. by the mapping of corresponding signalling. This mapping was designed and then implemented by the Authors in a Linux kernel. Results of laboratory experiments carried out in a test network show that the proposed mappings sufficiently promote traffic described by the TFD option in 802.11 WLAN and protect it against degradation. The proposed method includes the mapping of static signalling. Mapping of dynamic information conveyed in the TFD option is also possible and will be a subject of further research. The mapping between TFD and IEEE 802.11 user priorities and access categories will allow a 802.11 network to preserve TFD-based QoS in wireless links. © Springer Nature Switzerland AG 2018.

关键词： Quality of service

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Two Approximate Approaches for Reliability Evaluation in Large Networks. Comparative Study

Two Approximate Approaches for Reliability Evaluation in Lar...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Petru Caşcaval Sabina-Adriana Floria Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iaşi Professor Dimitrie Mangeron Street 67 Iaşi Romania

This paper deals with the complex problem of reliability evaluation of stochastic networks in which both links and nodes failures are considered, and compares two approximate approaches able to reduce the computation time: a sum of disjoint products (SDP) approach and another based on Monte Carlo simulation. In case of the SDP approach, the reliability is computed based on the minimal paths. In a first stage, only the links of the network are considered, and a `multiple variables inversion' technique for developing the set of minimal paths into a sum of disjoint products is applied. Then, in a second stage, each term of the set of disjoint Iink- products is processed separately taking into consideration the reliability values for both links and adjacent nodes. In case of Monte Carlo simulation, for speeding up the method and reducing the computation time, both minimal paths and cuts are considered. Also, other acceleration techniques are applied.

关键词： computer network reliability Monte Carlo methods Mathematical model Reliability theory Stochastic processes Approximation algorithms

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Tank based unified torque/impedance control for a pneumatically actuated antagonistic robot joint

Tank based unified torque/impedance control for a pneumatica...

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2017 IEEE International Conference on Robotics and Automation, ICRA 2017

作者： Toedtheide, Alexander Shahriari, Erfan Haddadin, Sami Institute of Automatic Control Faculty of Electrical Engineering and Computer Science Institute of Automatic Control Leibniz Universität Hannover Appelstr. 11 HannoverD-30167 Germany

ISBN: (纸本)9781509046331

In this paper the concept of a unified torque/impedance controller is applied to a pneumatically actuated, antagonistic robot joint. The investigated control algorithm consists of a cascaded structure in which the outer torque/impedance controller commands a desired torque to two cylinder-based force controllers. The torque-/impedance controller is equipped with a virtual tank that ensures passivity of the control loops above force level. Additionally, a shaping function provides a continuous transition to impedance control in case of sudden contact loss during a torque control operation. External torques used in the feedback loop for contact force regulation are estimated by a momentum observer. Experimental and simulation results show a maximum deflection of 9.7° over 130 ms in case of contact loss until a resting position is reached. Additionally, step and sinusoidal torque tracking up to 5 Hz was successfully tested at good performance. © 2017 IEEE.

关键词： Torque

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Using Cloud and Mobile Technologies in the Hospitality Industry

Using Cloud and Mobile Technologies in the Hospitality Indus...

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Roedunet International Conference (RoEduNet)

作者： Ioan - Radu JINGA Laurentiu-Florin BOTEZATU Ioana CULIC Alexandru RADOVICI Faculty of Automatic Control and Computer “Politehnica” University of Bucharest Bucharest Romania Faculty of Engineering in Foreign Languages “Politehnica” University of Bucharest Bucharest Romania Research Department Wyliodrin Bucharest Romania Department of Computer Engineering “Politehnica” University of Bucharest Bucharest Romania

Although the expansion rate of the technology mixed with other domains is growing, restaurant industry has, on average, little to no technical solutions for the common problems of their business. A specific problem is the time consuming and ineffective methods of calculating the bill for every person at the table. In this paper, we describe an automatic and efficient solution for this problem, a platform that digitally extracts the products from the bill, no matter the structure of it and allows users to select the items they ordered.

关键词： Optical character recognition software Mobile applications Google History Real-time systems Industries Libraries

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Fractional Differential Equation Solvers in Octave/Matlab

Fractional Differential Equation Solvers in Octave/Matlab

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International Conference on Methods and Models in Automation and Robotics

作者： Marcin Sowa Aleksandra Kawala-Janik Waldemar Bauer Faculty of Electrical Engineering Silesian University of Technology Gliwice Poland Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Kraków Poland

This paper concerns solvers for time fractional differential equations in Matlab and Octave. The main analysis revolves around a time step size adaptive solver basing on the numerical method called SubIval. The basis of SubIval is explained and formulae for the step size adaptivity are given. The solver is compared with others basing on: fractional linear multistep methods, product integration rules and the Grunwald-Letnikov approximation.

关键词： Fractional calculus Differential equations Electrical engineering Electronic mail Matlab Capacitors Coils

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automatic language identification for romance languages using stop words and diacritics: Tool/experimental paper

arXiv

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arXiv 2018年

作者： Truicǎ, Ciprian-Octavian Velcin, Julien Boicea, Alexandru Computer Science and Engineering Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania University of Lyon ERIC Laboratory Lyon 2 Lyon France

automatic language identification is a natural language processing problem that tries to determine the natural language of a given content. In this paper we present a statistical method for automatic language identification of written text using dictionaries containing stop words and diacritics. We propose different approaches that combine the two dictionaries to accurately determine the language of textual corpora. This method was chosen because stop words and diacritics are very specific to a language, although some languages have some similar words and special characters they are not all common. The languages taken into account were romance languages because they are very similar and usually it is hard to distinguish between them from a computational point of view. We have tested our method using a Twitter corpus and a news article corpus. Both corpora consists of UTF-8 encoded text, so the diacritics could be taken into account, in the case that the text has no diacritics only the stop words are used to determine the language of the text. The experimental results show that the proposed method has an accuracy of over 90% for small texts and over 99.8% for large texts. Copyright © 2018, The Authors. All rights reserved.

关键词： Natural language processing systems

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Blind users' assistive technology based on the Android platform

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International Journal of Innovative Computing and Applications 2017年第3期8卷 162-171页

作者： Al-Nabulsi, Jamal Ma'touq, Jumana Abdallah, Emad E. Haloubi, Tarek Manasra, Ali Biomedical Engineering Department Faculty of Engineering Hashemite University Jordan Al-Ahliyya Amman University Amman19328 Jordan Institute of Automatic Control Leibniz Universität Hannover Germany Department of Computer Information System Faculty of Information Technology Hashemite University Jordan Biomedical Engineering Department Faculty of Engineering Al-Ahliyya Amman University Jordan

Because of the wide use of smartphones in our daily activities, a wide range of mobile applications have been developed to serve as assistive technologies. However, there is a lack of applications in the Arabic language to assist disabled people. The main aim of this paper is to build a simple yet accurate Arabic language application that is capable of helping blind users in real-Time. In the proposed technology, the blind user captures a photo and records his/her voice inquiry. The query is instantly sent with the captured photo to a set of volunteers. The volunteers answer the blind user enquiries and send the answers back. Fifteen visually impaired persons and ten volunteers were used in the experimental testing. The scenarios were carefully created based on realistic situations. The subjects were then asked to answer a questionnaire to test if their queries were answered effectively and efficiently. The early results are promising because all blind users found the proposed technology useful and 80% of them wanted to use it on a daily basis. In addition, all volunteers found the application easy to use with clear instructions and 80% of them were excited about using it to assist blind users. Copyright © 2017 Inderscience Enterprises Ltd.

关键词： Mobile computing

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Benchmarking top-k keyword and top-k document processing with T2K2and T2K2D2

arXiv

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arXiv 2018年

作者： Truicǎ, Ciprian-Octavian Darmont, Jérôme Boicea, Alexandru Rǎdulescu, Florin Computer Science and Engineering Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania Université de Lyon ERIC EA Lyon 23083 France

Top-k keyword and top-k document extraction are very popular text analysis techniques. Top-k keywords and documents are often computed on-the-fly, but they exploit weighted vocabularies that are costly to build. To compare competing weighting schemes and database implementations, benchmarking is customary. To the best of our knowledge, no benchmark currently addresses these problems. Hence, in this paper, we present T2K2, a top-k keywords and documents benchmark, and its decision support-oriented evolution T2K2D2. Both benchmarks feature a real tweet dataset and queries with various complexities and selectivities. They help evaluate weighting schemes and database implementations in terms of computing performance. To illustrate our benchmarks' relevance and genericity, we successfully ran performance tests on the TF-IDF and Okapi BM25 weighting schemes, on one hand, and on different relational (Oracle, PostgreSQL) and document-oriented (MongoDB) database implementations, on the other hand. Copyright © 2018, The Authors. All rights reserved.

关键词： Benchmarking

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A new approach to create a realistic virtual model of a cylindrical robot using Automation Studio

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IOP Conference Series: Materials Science and engineering 2019年第1期591卷

作者： C C Dosoftei A Lupu C M Pascal Gheorghe Asachi Technical University of Iasi Faculty of Automatic Control and Computer Engineering Bd. Dimitrie Mangeron nr. 67 700050 Iasi Romania

Industry 4.0 is mainly represented by the digitalization technologies of physical industrial assets, thus obtaining the cyber-physical systems. A key role in digitalization developing is indeed played by possibility to develop a realistic virtual model (3D model) and using this model in virtual simulations to test the functionality of the system at possible scenarios from real world. The paper presents the modelling a mechatronic system represented by a three-dimensional cylindrical type manipulator in Automation Studio software and aims creating cinematic animation which will be used in the field of virtual commissioning. This approach in Industry 4.0 paradigm is studied in the academic environment and in the industrial research from last decade time, because generate major benefits such as in remote accessibility for learning, time efficiency from planning to real setup with possibility of detection and debugging of errors in the system, for minimizing time commissioning and predictive maintenance.

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Stereo vision based environment analysis and perception for autonomous driving applications

Stereo vision based environment analysis and perception for ...

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IEEE International Conference on Intelligent computer Communication and Processing

作者： Adrian Burlacu Simona Caraiman Amalia Cozma Ecaterina Dobrincu Robert Lupu Roxana Miron Otilia Zvoristeanu Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Romania

Environment analysis and perception are two of the most important tasks in various application areas involving stereo vision. Specifically to autonomous driving applications these tasks are related to systems awareness and are direct linked to the decision process. This research proposes an architecture for environment analysis and perception with strait forward replicable design. This architecture is structured in three parts: input data, environment analysis and environment perception. Starting from a disparity map the architecture employs different representations that allow for ground area and obstacles detection. For free space assessment a polar grid is built allowing for better interpretation of the free space direction. In the end obstacle classification adds new information to the obstacles position and orientation. Classification is done using existing trained neural classifiers.

关键词： computer architecture Stereo vision Roads Cameras Autonomous vehicles Three-dimensional displays Feature extraction

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