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arXiv 2017年

作者： Xu, Xiao Liu, Qian Steinbach, Eckehard Chair of Media Technology Technical University of Munich Germany Chair of Media Technology Chair of Communication Networks Technical University of Munich Germany Dept. of Computer Science and Technology Dalian University of Technology Dalian China

— Networked teleoperation with haptic feedback is a prime example for the emerging Tactile Internet, which requires a careful orchestration of haptic communication and control. One major challenge in this context is how to maximize the user’s quality-of-experience (QoE) while ensuring at the same time the stability of the global control loop in the presence of communication delay. In this paper, we propose a dynamic control scheme switching strategy for teleoperation systems, which maximizes the QoE for time-varying communication delay. In order to validate the feasibility of the proposed approach, we perform a dedicated case study for a virtual teleoperation environment consisting of a one-dimensional spring-damper system, and conduct extensive subjective tests under various delay conditions for two control schemes: (1) teleoperation with the time-domain passivity approach (TDPA), which is highly delay-sensitive but supports highly dynamic interaction between the operator and a potentially quickly changing remote environment;(2) model-mediated teleoperation (MMT), which is tolerable to relatively larger communication delays, but unsuitable for quickly changing, highly dynamic remote environments. For both schemes, we use recently proposed extensions, which incorporate perceptual data reduction to reduce the required packet rate between the operator and the teleoperator. One key contribution of this paper lies in the exploration of the intrinsic relationship among QoE, communication delay and the control schemes which provides a fundamental guidance, not only to this research, but also to the future joint optimization of communication and control for time-delayed teleoperation systems. Copyright © 2017, The Authors. All rights reserved.

关键词： Remote control

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A compact spectacles shaped patch antenna for UWB applications 9

A compact spectacles shaped patch antenna for UWB applicatio...

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9th International Conference on Electrical and computer Engineering, ICECE 2016

作者： Islam, M. Tarikul Samsuzzaman, M. Islam, M. Z. Mahmud M.T. Dept. of Computer and Communication Engineering Patuakhali Science and Technology University Patuakhai Bangladesh Dept. of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia Malaysia

ISBN: (纸本)9781509029631

In this paper, a new compact spectacles shaped patch UWB antenna using a microstrip fed line is proposed. The new design is consist of a spectacles shaped patch along with tapered slot ground *** proposed antenna has a compact electrical dimension of 0.24 λ × 0.21 λ × 0.016 λ and fed with a 50- ohm microstrip transmission line. computer Simulation Technology (CST) based on finite-difference time-domain method and High Frequency Structural Simulator (HFSS) based on finite element method is implemented in this research. In simulation, a wider frequency bandwidth of 8.5 GHz (3.0 - 11.5 GHz) with excellent impedance matching which covers entire UWB frequency, stable radiation pattern and constant gain is achieved. The proposed antenna is low profile, inexpensive and has excellent characteristics of UWB. © 2016 IEEE.

关键词： Microstrip antennas

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An Energy Demand Model for the Microscopic Simulation of Plug-In Hybrid Vehicles

An Energy Demand Model for the Microscopic Simulation of Plu...

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Transportation Electrification Conference and Expo

作者： Lorenz Ammon Bernd Huber Florian Hübler Rüdiger Berndt Sebastian Schellenberg Vitali Schneider Computer Networks and Communication Systems Dept. of Computer Science University of Erlangen-Nürnberg Germany

ISBN: (纸本)9781509004041

More and more car manufactures are combining a normal combustion engine and an electric motor to satisfy the standards for CO2 emissions. In order to take advantage of this technology in the most efficient way, for example in companies car fleets, realistic simulation models are required. In this paper, we present an accurate yet computationally inexpensive energy demand model for the microscopic simulation of plug-in hybrid vehicles. Our model mostly consists of a combustion engine, an electric motor and, most importantly, a realistic engine management model. Furthermore, a pragmatic kinematic model as well as a model for recuperation of energy while breaking are provided. Modularly designed, our simulation model allows for simple replacement and adjustment of each module. As input values, our model only requires the vehicle's speed and a set of constant predefined parameters. Consequently, this also enables the model to be easily connected with current sophisticated traffic simulators. We show the correctness of our model regarding the consumption of fuel and electric energy using comprehensive real-world experiments.

关键词： Electromobility Plug-in Hybrid Electric Vehicle Simulation

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On the impact of antenna patterns on VANET simulation

On the impact of antenna patterns on VANET simulation

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IEEE Vehicular Networking Conference (VNC)

作者： David Eckhoff Alexander Brummer Christoph Sommer Computer Networks and Communication Systems University of Erlangen Germany Dept. of Computer Science Paderborn University Germany

ISBN: (纸本)9781509051984

Although the level of realism in vehicular network simulation is constantly increasing, antenna radiation patterns have only rarely entered the picture. In this paper we investigate the impact of these antenna patterns on the outcome of a city-wide simulation with hundreds of cars as well as an isolated intersection collision avoidance scenario. We show that in both cases pronounced differences can be observed: Compared to idealistic isotropic antennas, using realistic antennas changes the distribution of angle of arrival, affecting network topology dynamics. In collision avoidance applications, the antenna radiation pattern can make the difference between a crash and a successful emergency brake, strongly indicating that antenna characteristics should find more consideration in vehicular network simulation.

关键词： Antenna radiation patterns Vehicles Receiving antennas Safety Computational modeling Antenna measurements

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Marrying safety with privacy: A holistic solution for location privacy in VANETs

Marrying safety with privacy: A holistic solution for locati...

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IEEE Vehicular Networking Conference (VNC)

作者： David Eckhoff Christoph Sommer Computing and Information Systems Department The University of Melbourne Australia Computer Networks and Communication Systems University of Erlangen Germany Dept. of Computer Science Paderborn University Germany

ISBN: (纸本)9781509051984

Existing privacy measures often conflict with the requirements of future vehicular networks. First and foremost, in attempting to achieve local privacy, they interfere with the primary purpose of vehicular networks: to improve road safety. Other solutions undermine accountability or introduce too high overhead to be of practical use. For this reason, proper privacy protection is disregarded in many field experiments, proposals, and standardization documents. In this paper, we take a structured approach to deriving a holistic solution for location privacy protection in Vehicular Ad-Hoc networks (VANETs): Under reasonable assumptions about an adversary's capability, local privacy is neither required nor can it be achieved without compromising traffic safety. Our approach is therefore based on synchronized time-slotted pseudonym pools and the local announcing of pseudonym changes. By this, we overcome the privacy-safety problem while at the same time increasing privacy for all users. Our system is fully compatible with the requirements of vehicular networks and current standardization efforts.

关键词： Privacy Vehicles Safety Proposals Standards Ad hoc networks

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Adaptive control for pivoting with visual and tactile feedback

Adaptive control for pivoting with visual and tactile feedba...

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2016 IEEE International Conference on Robotics and Automation, ICRA 2016

作者： Vina, Francisco E.B. Karayiannidis, Yiannis Smith, Christian Kragic, Danica Computer Vision and Active Perception Lab. Centre for Autonomous Systems School of Computer Science and Communication Royal Institute of Technology KTH StockholmSE-100 44 Sweden Dept. of Signals and Systems Chalmers University of Technology GothenburgSE-412 96 Sweden

ISBN: (纸本)9781467380263

In this work we present an adaptive control approach for pivoting, which is an in-hand manipulation maneuver that consists of rotating a grasped object to a desired orientation relative to the robot's hand. We perform pivoting by means of gravity, allowing the object to rotate between the fingers of a one degree of freedom gripper and controlling the gripping force to ensure that the object follows a reference trajectory and arrives at the desired angular position. We use a visual pose estimation system to track the pose of the object and force measurements from tactile sensors to control the gripping force. The adaptive controller employs an update law that accommodates for errors in the friction coefficient, which is one of the most common sources of uncertainty in manipulation. Our experiments confirm that the proposed adaptive controller successfully pivots a grasped object in the presence of uncertainty in the object's friction parameters. © 2016 IEEE.

关键词： Friction

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Genetic Algorithm for Routing and Spectrum Allocation in Elastic Optical networks

Genetic Algorithm for Routing and Spectrum Allocation in Ela...

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European Network Intelligence Conference (ENIC)

作者： Piotr Lechowicz Krzysztof Walkowiak Dept. of Systems and Computer Networks Wroclaw University of Science and Technology Wroclaw Poland

ISBN: (纸本)9781509034567

Elastic Optical Network (EON) architecture has been proposed as a promising technology for a new generation of OFDM networks. It is based on the concept that spectrum can be split into smaller slices than are used currently in the fixed-grid network. It allows better spectral utilization and support for bit rates over 100 Gb/s. EONs arise with the problem of routing and spectrum allocation (RSA). In this paper, we propose a Genetic Algorithm (GA) to solve the RSA problem with multicast flows. Different selection and crossover strategies are presented. Extensive numerical experiments are performed to select the most appropriate combination of operators and tuning parameters of the GA algorithm in the context of the RSA problem. Obtained results show that GA can be applicable.

关键词： Genetic algorithms Routing OFDM Optical fiber networks Biological cells Resource management Modulation

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Differential evolution for task allocation in mesh networks: Experimentation system and comparison of mutation schemes

Differential evolution for task allocation in mesh networks:...

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International Symposium on Computational and Business Intelligence (ISCBI)

作者： Adam Wlodarczyk Iwona Pozniak-Koszalka Leszek Koszalka Andrzej Kasprzak Dept. of Systems and Computer Networks Wroclaw University of Science and Technology Wroclaw Poland

ISBN: (纸本)9781509034895

The paper concerns the problem of the allocation of processes in mesh structured systems. The implemented optimization algorithm is based on the idea of Differential Evolution. The algorithm can be tuned along with ten different mutation schemes. The essential aim of the paper is checking these mutation schemes' impact on the efficiency of the considered algorithm. The studies are based on the simulations which have been made using the own created and implemented experimentation system. The reported results allow for the recommendation of one of the mutation schemes called DE/best/2.

关键词： Resource management Mesh networks Program processors Algorithm design and analysis Sociology Statistics computer architecture

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Path optimization in 3D printer: Algorithms and experimentation system

Path optimization in 3D printer: Algorithms and experimentat...

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International Symposium on Computational and Business Intelligence (ISCBI)

作者： Piotr Lechowicz Leszek Koszalka Iwona Pozniak-Koszalka Andrzej Kasprzak Dept. of Systems and Computer Networks Wroclaw University of Science and Technology Wroclaw Poland

ISBN: (纸本)9781509034895

3d Printers create an object by printing thousands of successive thin layers. Each layer is created by the printing tool which moves on the selected paths. The ability to reduce the total length of printing paths results in lower overall time needed for printing process. In this paper there are presented two hybrid algorithms for that purpose, Greedy Two Opt and Greedy Annealing. Both of them based on the same assumption that it is profitable to select initial solution with fast algorithm and after that, to try to improve it by further exploration of the solution space with the other one. The simulations made with the designed experimentation system confirmed good properties of the implemented algorithms.

关键词： Printing Printers Optimized production technology Algorithm design and analysis Three-dimensional displays Heuristic algorithms

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Demosaicking based on dual-CFA pattern

Demosaicking based on dual-CFA pattern

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IEEE International Workshop on Imaging systems and Techniques (IST)

作者： Xiangdong Chen Haoran Wu Bo Yang Gwanggil Geon School of Computer Science Nanjing University of Posts and Telecommunications Nanjing China School of Oversea Education Nanjing University of Posts and Telecommunications Nanjing China College of Communication and Information Engineering Nanjing University of Posts and Telecommunications Nanjing China Dept. Embedded Systems Engineering Incheon National University Incheon Korea

In this paper, we propose a dual-CFA pattern for imaging system. Different from the conventional single CFA, the proposed dual-CFA imaging system has two advantages: first, compared with the single CFA pattern, the populated image based on the dual-CFA pattern has almost no artifacts on the edge and texture details; second, it greatly reduces the false color artifacts because more color information can be used when interpolating the missing color components; As compared with the latest demosaicking algorithms, experiments show that the proposed algorithm provides superior performance in terms of both objective and subjective image qualities.

关键词： Image color analysis Interpolation Digital cameras Image edge detection Optical filters

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