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Sparse vector autoregressive modeling of audio signals and its application to the elimination of impulsive disturbances

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IFAC-PapersOnLine 2015年第28期48卷 1208-1213页

作者： Maciej, Niedwiecki Marcin, Ciolek Faculty of Electronics Telecommunications and Computer Science Department of Automatic Control Gdask University of Technology ul Narutowicza 11/12 Gdask Poland

Archive audio files are often corrupted by impulsive disturbances, such as clicks, pops and record scratches. This paper presents a new method for elimination of impulsive disturbances from stereo audio signals. The proposed approach is based on a sparse vector autoregressive signal model, made up of two components: one taking care of short-term signal correlations, and the other one taking care of long-term correlations. The method is evaluated on a set of clean audio signals contaminated with real click waveforms extracted from silent parts of old gramophone recordings. © 2015

关键词： Vectors Phonograph records Autoregressive signals Impulsive disturbances ITS applications Long term correlations Signal correlation Sparse vectors Stereo audio signal Two component

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Embedded model control GNC for the next generation gravity mission 67

Embedded model control GNC for the next generation gravity m...

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67th International Astronautical Congress, IAC 2016

作者： Colangelo, Luigi Massotti, Luca Canuto, Enrico Novara, Carlo Dionisio, Sabrina Department of Control and Computer Engineering Politecnico di Torino Corso Duca degli Abruzzi 24 Turin10129 Italy ESA-ESTEC NoordwijkNL-2200 Netherlands Engineering Department Domain Exploration and Science Thales Alenia Space Italia Strada Antica di Collegno 253 Turin Italy

A Next Generation Gravity Mission (NGGM) concept for measuring the Earth's variable gravity field has been recently proposed by ESA. The mission objective consists in measuring the temporal variations of the Earth gravity field over a long time span, with very high spatial and temporal resolutions. This paper focuses on the GNC design for NGGM. NGGM will consist of a two-satellite long-distance formation like GRACE, where each satellite will be controlled to be drag-free like GOCE. Satellite-to-satellite distance variations, encoding gravity anomalies, will be measured by laser interferometry. The formation satellites, distant up to 200 km, will fly in a quasi-polar orbits at an Earth altitude between 300 and 450 km. Orbit and formation control counteract bias and drift of the residual drag-free accelerations, in order to reach orbit/formation long-term stability. Drag-free control is the core of the orbit/formation control since it allows the formation to fly counteracting the atmospheric drag, ideally subjected only to gravity. Orbit and formation control, designed through the innovative Integrated Formation control (IFC), have been integrated into a unique control system, aiming at stabilizing the 'formation triangle' consisting of satellites and Earth Center of Masses. In addition, both spacecrafts must align their control axis to the satellite-to-satellite line (SSL) with micro-radian accuracy. This is made possible by specific optical sensors and the inter-satellite laser interferometer, capable of materializing the SSL. Such sensors allow each satellite to pursue an autonomous alignment after a suitable acquisition procedure. Pointing control is severely constrained by the angular drag-free control which must ideally zero the angular acceleration vector, in the science frequency band. The control unit has been designed according to the Embedded Model control methodology and is organized in a hierarchical way where drag-free control plays the role of a wide-ba

关键词： Orbits

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Direct Torque control of Induction Motor with Matrix Converter

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Journal of engineering science and Technology Review 2016年第2期9卷 50-58页

作者： Gaeid, Khalaf Salloum Murshid, Asim Majeed Salih, Ziad Hussein Electrical Engineering Department Tikrit University Iraq Computer Department College of Science Kirkuk University Iraq Control and oComputer Department Tikrit University Iraq

The matrix converter (MC) with direct torque control (DTC) combination is efficient way to get better performance specificationsin the industry. The MC and the DTC advantages are combined together. The reduction of complexity and cost ofDC link in the DTC since it has no capacitors in the circuit. However, the controlling torque is a big problem it in DTCbecause of high ripple torque production which results in vibrations response in the operation of the iductuction motor as ithas no PID to control the torque directly. To overcome this, a combination of MC with DTC is applied to reduce the fluctuationin the output torque and minimize the steady state error. This paper presents the simulation analysis of inductionmachine drives using Maltlab/Simulink toolbox R2012a. Design of DTC induction motor drive, MC with constantswitching frequency, speed controller and stability investigation as well as controllability and observabilty with minimum final prediction (FPE) steady state error and loss functionality has been carried out precisely. © 2016 Eastern Macedonia and Thrace Institute of Technology.

关键词： Induction motors

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A Critical Review of MANET Testbed Using Mobile Robot Technology

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Journal of Physics: Conference Series 2018年第1期1019卷 012046-012046页

作者： Muchtar, Farkhana Abdul Hanan Abdullah Marina Md Arshad Mohd Helmy Abd Wahab Siti Nor Zawani Ahmmad Abdul-Salaam, Gaddafi Faculty of Computing Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia School of Computer Sciences Universiti Sains Malaysia 11800 Gelugor Pulau Pinang Malaysia Faculty of Computing Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Faculty of Electronic and Electrical Engineering Universiti Tun Hussein Onn 86400 Batu Pahat Johor Malaysia Instrumental and Control Engineering University Kuala Lumpur MITEC Persiaran Sinaran Ilmu Bandar Seri Alam 81750 Johor Malaysia Department of Computer Science Kwame Nkrumah University of Science and Technology Ghana

This paper is a continuation of our previous paper under the same topic, MANET testbed using mobile robot technology. In our previous paper, we studied the topic by scrutinizing all the technical aspects and presented it as a technical review. However in this paper, we study the topic and presents it as a critical review that dwells into four aspect, namely (i) purpose, accessibility and scope of testbed facilities, (ii) usability and controllability of robot mobility in t estbed facilities, (iii) repeatability and reproducibility of real mobility in t estbeds, and (iv) tools for MANET implementation, deployment and debugging for experiments. With the wealth of information on the topic provided in this paper, the content of this paper is expected to be a source of reference for MANET researchers who are at a crossroad when selecting the preferred mobile robot technology and approach to suit their own specific needs.

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Towards multi-functional light-weight long-term real-time coastal ocean observation system 11

Towards multi-functional light-weight long-term real-time co...

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11th ACM International Conference on Underwater Networks and Systems, WUWNet 2016

作者： Jiang, Zhenfeng Ma, Yanming Chen, Jiali Wang, Zigeng Peng, Zheng Liu, Jun Han, Guitao Smart Ocean Industry Research Institute Nantong Jiangsu226000 China Computer Science and Engineering Department University of Connecticut StorrsCT06269 United States Computer Science Deparment City College of New York NY10031 United States Computer Science and Technology Department Jilin University Changchun Jilin130012 China State Key Laboratory of Robotics Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China

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Pedestrian Detection via Contour Fragments

Pedestrian Detection via Contour Fragments

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第35届中国控制会议

作者： Dandi Chen Siyu Xia Yuan Zhou Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Computer Science and Engineering Department University of Connecticut

ISBN: (纸本)9781509009107

Pedestrian detection has been the key point of several hot research fields,including intelligent surveillance,driving assistance,intelligent robot,*** to pedestrian appearance,multi-pose,angle of view,environment and other factors,the existing pedestrian detection algorithms still have some unsolved technical *** this paper,we focus on contour *** on traditional feature descriptors and feature selection methods,we proposed a novel oriented Chamfer distance(OCD) feature to describe pedestrian *** improves anti-interference ability of image noise using Bag of Words(BOW)model and image multi-scale ***,we conducted experimental comparisons using scale-invariant feature transform(SIFT),histogram of oriented gradient(HOG),speeded up robust feature(SURF) and OCD feature in feature extraction and parameter optimization,in Boosting and support vector machine(SVM) classification *** results demonstrate that the proposed OCD feature has great discriminant ability of pedestrian contours.

关键词： Pedestrian detection Contour feature Oriented Chamfer distance feature Support vector machine Boosting

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3D Mesostructures: Fabrication and Deformation of 3D Multilayered Kirigami Microstructures (Small 11/2018)

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Small 2018年第11期14卷

作者： Mohammad Humood Yan Shi Mengdi Han Joseph Lefebvre Zheng Yan Matt Pharr Yihui Zhang Yonggang Huang John A. Rogers Andreas A. Polycarpou Department of Mechanical Engineering College of Engineering Texas A&M University College Station TX 77843-3123 USA State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China Center for Mechanics and Materials and Center for Flexible Electronics Technology AML Department of Engineering Mechanics Tsinghua University Beijing 100084 P. R. China Department of Materials Science and Engineering Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana IL 61801 USA Bruker Nano Surfaces Eden Prairie MN 55344 USA Department of Chemical Engineering and Department of Mechanical and Aerospace Engineering University of Missouri Columbia MI 65211 USA Departments of Mechanical Engineering and Civil and Environmental Engineering Northwestern University Evanston IL 60208 USA Department of Biomedical Engineering Department of Chemistry Department of Mechanical Engineering Department of Electrical Engineering and Department of Computer Science Center for Bio-Integrated Electronics Simpson Querrey Institute for Nano/Biotechnology Northwestern University Evanston IL 60208 USA

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Delay- and diversity-aware buffer-aided relay selection policies in cooperative networks

Delay- and diversity-aware buffer-aided relay selection poli...

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IEEE Wireless Communications and Networking Conference

作者： Dimitrios Poulimeneas Themistoklis Charalambous Nikos Nomikos Ioannis Krikidis Demosthenes Vouyioukas Mikael Johansson Automatic Control Lab Royal Institute of Technology (KTH) Department of Signals and Systems Chalmers University of Technology Department of Information and Communication Systems Engineering University of the Aegean Electrical and Computer Engineering Department University of Cyprus

ISBN: (纸本)9781467398152

In this paper, we propose novel relay selection policies that aim at reducing the average delay by incorporating the buffer size of the relay nodes into the relay selection process. More specifically, we propose two delay-aware protocols that are based on the max - link relay selection protocol. First, a delay-aware only approach while it reduces the delays considerably it starves the buffers and increases the outage probability of the system. Towards this end, we propose a delay- and diversity-aware buffer-aided relay selection policy that aims at reducing the average delay considerably and at the same time maintaining good diversity. The protocols are analyzed by means of Markov Chains and expressions for the outage, throughput and delay are derived. The performance and use of our proposed algorithms is demonstrated via extensive simulations and comparisons.

关键词： Cooperative relaying Relay selection Buffer-aided relaying Delays Diversity Markov chains

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Further results on the exploration of combinatorial tree in multi-parametric quadratic programming

Further results on the exploration of combinatorial tree in ...

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European control Conference (ECC)

作者： Parisa Ahmadi-Moshkenani Sorin Olaru Tor Arne Johansen Department of Engineering Cybernetics NTNU Trondheim Norway SUPÉLEC Systems Science (E35) Automatic Control Department Gif-Sur-Yvette France

A combinatorial approach has been recently proposed for multi-parametric quadratic programming and has shown to be more effective in finding the complete solution than existing geometric methods for higher-order systems. In this paper, we propose a method for exploring the combinatorial tree which exploits some of the underlying geometric properties of adjacent critical regions as the supplementary information in combinatorial approach to exclude a noticeable number of feasible candidate active sets from combinatorial tree. This method is particularly well-suited for cases where many combinations of active constraints are feasible but not optimal. Results indicate that this method can find all critical regions corresponding to non-degenerate multi-parametric programming. A postprocessing algorithm can be applied to complete the proposed method in the cases in which some critical regions might not be enumerated due to degeneracies in the problem.

关键词： Quadratic programming Partitioning algorithms Computational complexity Simulation Europe Prediction algorithms

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Experimental demonstration of quantum fully homomorphic encryption with application in a two-party secure protocol

arXiv

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arXiv 2018年

作者： Tham, W.K. Ferretti, Hugo Bonsma-Fisher, Kent Brodutch, Aharon Sanders, Barry C. Steinberg, Aephraim M. Jeery, Stacey Department of Physics University of Toronto 60 St George St TorontoONM5S 1A7 Canada Center for Quantum Information and Quantum Control University of Toronto 60 St George St Toronto OntarioM5S 1A7 Canada Edward S. Rogers Department of Electrical and Computer Engineering University of Toronto 10 Kings College Road TorontoONM5S 3G4 Canada Institute for Quantum Science and Technology University of Calgary AlbertaT2N 1N4 Canada Institute for Quantum Information and Matter California Institute of Technology PasadenaCA91125 United States Program in Quantum Information Science Canadian Institute for Advanced Research TorontoONM5G 1M1 Canada QuSoft and Cwi Amsterdam Netherlands

A fully homomorphic encryption system hides data from unauthorized parties, while still allowing them to perform computations on the encrypted data. Aside from the straightforward benefit of allowing users to delegate computations to a more powerful server without revealing their inputs, a fully homomorphic cryptosystem can be used as a building block in the construction of a number of cryptographic functionalities. Designing such a scheme remained an open problem until 2009, decades after the idea was first conceived, and the past few years have seen the generalization of this functionality to the world of quantum machines. Quantum schemes prior to the one implemented here were able to replicate some features in particular use-cases often associated with homomor-phic encryption but lacked other crucial properties, for example, relying on continual interaction to perform a computation or leaking information about the encrypted data. We present the first experimental realisation of a quantum fully homomorphic encryption scheme. We further present a toy two-party secure computation task enabled by our scheme. Finally, as part of our implemen-tation, we also demonstrate a post-selective two-qubit linear optical controlled-phase gate with a much higher post-selection success probability (1/2) when compared to alternate implementations, e.g. with post-selective controlled-Z or controlled-X gates (1/9). Copyright © 2018, The Authors. All rights reserved.

关键词： Toys

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