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arXiv 2019年

作者： Dharmavarapu, Raghu Izumi, Ken-Ichi Katayama, Ikufumi Ng, Soon Hock Vongsvivut, Jitraporn Tobin, Mark J. Kuchmizhak, Aleksandr Nishijima, Yoshiaki Bhattacharya, Shanti Juodkazis, Saulius Department of Electrical Engineering Indian Institute of Technology Madras Chennai600036 India Centre for Micro-Photonics Faculty of Science Engineering and Technology Swinburne University of Technology HawthornVIC3122 Australia Melbourne Centre for Nanofabrication ANFF 151 Wellington Road ClaytonVIC3168 Australia Physics Department Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama240-8501 Japan Infrared Microspectroscopy Beamline Australian Synchrotron ClaytonVIC3168 Australia Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Sciences Vladivostok690041 Russia Far Eastern Federal University Vladivostok690090 Russia Department of Electrical and Computer Engineering Graduate School of Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama240-8501 Japan Institute of Advanced Sciences Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama240-8501 Japan School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo152-8550 Japan

Metasurfaces are engineered thin surfaces comprising two dimensional (2D) arrays of sub-wavelength spaced and sub-wavelength sized resonators. Metasurfaces can locally manipulate the amplitude, phase and polarization of light with high spatial resolution. In this study, we report numerical and experimental results of a vortex-beam-generating metasurface fabricated specifically for infrared (IR) and terahertz (THz) wavelengths. The designed metasurface consisted of a 2D array of dielectric cross-shaped resonators with spatially varying length, thereby providing desired spatially varying phase shift to the incident light. The metasurface was found to be insensitive to polarization of incident light. The dimensions of the cross-resonators were calculated using rigorous finite difference time domain (FDTD) analysis. The spectral scalability via physical scaling of meta resonators was demonstrated using two vortex generating optical elements operating at 8.8 μm (IR) and 0.78 THz (Terahertz). The vortex beam generated in the mid-IR spectral range was imaged using FTIR imaging miscroscope equipped with a focal plane array (FPA) detector. This design could be used for efficient wavefront shaping as well as various optical imaging applications in mid-IR spectral range, where polarization insensitivity is desired. Copyright © 2019, The Authors. All rights reserved.

关键词： Resonators

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Towards a Smart Manufacturing Maturity Assessment Framework: A Socio-Technical Perspective

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Journal of Physics: Conference Series 2019年第4期1345卷

作者： Lei Yue Pengfei Niu Yifang Fang Zhonghua Han Sensor and Network Control Center Instrumentation Technology and Economy Institute Beijing 100055 China Information Center Instrumentation Technology and Economy Institute Beijing 100055 China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang 110016 China

Researchers of information technology (IT) have often suggested that there is no clear relevance between the IT investment and return on investment (ROI) of enterprises. This phenomenon is called 'productivity paradox'. However, research on smart manufacturing capability maturity did not reflect empirically the fact that enterprises rarely benefit from information systems. Therefore, the aim of this article attempts to explore how humans and technologies are related and propose a smart manufacturing maturity assessment framework that can reveal the interaction between humans and technologies. This research addressed two questions, (a) what domains can be identified for smart manufacturing, and (b) how to harmonize all of the technical and social factors affecting maturity and benefits. A complicated concept 'socio-technical system' was surveyed for interpreting how enterprises benefit from technologies. Results of this study showed a smart manufacturing maturity assessment framework from the socio-technical perspective. As an explanation, the understanding of manufacturing operations management (MOM) capability maturity model (CMM) within the framework in the case study and its results were presented. To conclude, this study may be regarded as a meta-model or reference model for specific maturity models, as well as has the merit of offering valuable insights into the maturity assessment.

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Transmission-order optimization for bidirectional device-to-device (D2D) communications underlaying cellular TDD networks - A graph theoretic approach

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IEEE Journal on Selected Areas in Communications 2016年第1期34卷 1-14页

作者： Uykan, Zekeriya Jäntti, Riku Department of Control and Automation Engineering Faculty of Engineering Doʇuş University Istanbul34722 Turkey Aalto University School of Electrical Engineering Aalto University Espoo02150 Finland

Device-to-device (D2D) communications underlaying cellular networks is a promising concept that has several advantages over the traditional cellular networks. In the TDD system, the frame structure defines the order of uplink and downlink transmission slots. Typically, a TDD system is synchronized, and the same transmission order (TO) is used in all cells. In a direct D2D link, we have the freedom of selecting the TO of the devices freely. To our best knowledge, no paper has explicitly examined the TO optimization problem in D2D communications underlaying cellular network so far. In this paper, we focus exactly on this problem: once the proper co-channel D2D pairs are determined in the network, how do we minimize the network interference by optimally determining the TOs in all D2D links (together with co-channel cellular links) in the network, which is an NP-complete problem. In this paper, we formulate the TO optimization problem from a graph theoretic point of view: 1) we show that the TO optimization problem is equal to a constraint balanced min-cut graph partitioning problem of our defined augmented graph;and 2) we propose and analyze a distributed and a centralized efficient asynchronous clustering algorithm for solving the TO optimization problemequivalently for themin-cut of our proposed augmented graph. Computer simulations for the TDD-based D2D underlaying cellular network show that the proposed distributed and centralized algorithms, called ABCAMiC and CABCAMiC, respectively, 1) remarkably outperform the reference case where all TOs are fixed, 2) converge within a relatively small number of steps and generally converge in only a few epochs even for a large number of cellular and D2D users, and 3) the expected performance of the (partly/fully) distributed ABCAMiC is almost equal to that of the centralized solution CABCAMiC, which generally gives near-global optimal solution to the TO optimization problem. © 2015 IEEE.

关键词： Clustering algorithms

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Multi-objective drilling trajectory optimization based on NSGA-II

Multi-objective drilling trajectory optimization based on NS...

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Asian control Conference

作者： Wendi Huang Min Wu Jun Cheng Xin Chen Weihua Cao Yule Hu Hui Gao School of Automation Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China Faculty of Engineering China University of Geosciences Wuhan China

ISBN: (纸本)9781509015740;9781509015733

Facing the demand of the efficiency and safety of drilling process, it is necessary to find the optimal drilling trajectory in the complex geological environment. To solve this multi-objective optimization problem, non-dominated sorting genetic algorithm II (NSGA-II) is applied. And Linear sum weighted method is applied at the same time for comparison. Firstly, the numerical model of a sidestracking horizontal well trajectory is established by nature curve method. Constraints subjected to engineering conditions and objective functions are discussed. Then, as decision parameters, the build rate and the turn rate are optimized. Finally, optimal solutions distributed on the Pareto front uniformly are obtained.

关键词： Trajectory Linear programming Optimization methods Sociology Statistics Sorting

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Random asynchronous iterations in distributed coordination algorithms

arXiv

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arXiv 2018年

作者： Chen, Yao Xia, Weiguo Cao, Ming Lü, Jinhu Department of Computer Science Southwestern University of Finance and Economics Chengdu611130 China School of Control Science and Engineering Dalian University of Technology Dalian116024 China Faculty of Science and Engineering ENTEG University of Groningen Groningen9747 AG Netherlands School of Automation Science and Electrical Engineering State Key Laboratory of Software Development Environment Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Beijing100191 China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China

Distributed coordination algorithms (DCA) carry out information processing processes among a group of networked agents without centralized information fusion. Though it is well known that DCA characterized by an SIA (stochastic, indecomposable, aperiodic) matrix generate consensus asymptotically via synchronous iterations, the dynamics of DCA with asynchronous iterations have not been studied extensively, especially when viewed as stochastic processes. This paper aims to show that for any given irreducible stochastic matrix, even non-SIA, the corresponding DCA lead to consensus successfully via random asynchronous iterations under a wide range of conditions on the transition probability. Particularly, the transition probability is neither required to be independent and identically distributed, nor characterized by a Markov chain. Copyright © 2018, The Authors. All rights reserved.

关键词： Stochastic systems

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Gaussian pedestrian proxemics model with social force for service robot navigation in dynamic environment 17th

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17th International Conference on Asia Simulation, AsiaSim 2017

作者： Chik, Sheng Fei Yeong, Che Fai Su, Eileen Lee Ming Lim, Thol Yong Duan, Feng Tan, Jeffrey Too Chuan Tan, Ping Hua Chin, Patrick Jun Hua Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia Centre for Artificial Intelligence and Robotics Universiti Teknologi Malaysia Johor Bahru Malaysia Malaysia Japan Institute of Technolgy Universiti Teknologi Malaysia Johor Bahru Malaysia Department of Automation College of Computer and Control Engineering Nankai University Tianjin China Institute of Industrial Science The University of Tokyo Tokyo Japan DF Automation and Robotics Sdn. Bhd Skudai Malaysia

ISBN: (纸本)9789811064623

Pedestrian motion behaves stochastically, causing difficulties in modelling the appropriate proxemics for effective and efficient service robot navigation. Intruding the pedestrian social space can affect the social acceptance of a service robot. In this paper, a new proxemics model, Social-Force Gaussian Pedestrian Proxemics Model is presented to model the pedestrian social space and to improve the service robot navigation in dynamic human environment. This model was simulated and validated in a pedestrian simulator with both low and high pedestrian density environments. Results showed that the proposed model (i) improved proxemics representation of pedestrians, (ii) enhanced the robot performance in respecting the social norm and (iii) increased the efficiency in achieving a given task. This paper also presents the methods for parameter selections for the model without the requirement of complex tuning. © Springer Nature Singapore Pte Ltd. 2017.

关键词： Mobile robots

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Research on the tip-carbon nanotube interaction model using molecular dynamics simulation

Research on the tip-carbon nanotube interaction model using ...

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2017 9th International Conference on Modelling, Identification and control (ICMIC 2017)

作者： Shuai Yuan Xiao Yao Zhihua Liu Jingang Shi Jingyi Xing Information & Control Engineering Faculty Shenyang Jianzhu University State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of Sciences

In atomic force microscopy(AFM) based carbon nanotubes(CNTs) manipulation,the interaction force between AFM tip and CNT has a significant effect on the operation *** this paper,we propose to simulate the contact model between AFM tip and carbon nanotube by using molecular dynamics *** the proposed framework,different contact process(under different tip shapes,tip sizes,and contact positions) are also *** effectiveness of this proposed simulation is verified by comparing the simulation result with the literature *** study explores atomic scale mechanical changes in the AFM tip-CNT interaction,providing a more accurate mechanical basis for AFM based CNT manipulation.

关键词： AFM carbon nanotube interaction force molecular dynamics simulation

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Search-based optimal motion planning for automated driving

arXiv

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arXiv 2018年

作者： Ajanovic, Zlatan Lacevic, Bakir Shyrokau, Barys Stolz, Michael Horn, Martin Virtual Vehicle Research Center Inffeldgasse 21a Graz8010 Austria Faculty of Electrical Engineering University of Sarajevo Sarajevo Bosnia Herzegovina7100 Bosnia and Herzegovina Department of Cognitive Robotics Delft University of Technology Mekelweg 2 Delft2628 Netherlands Institute of Automation and Control at Graz University of Technology Inffeldgasse 21b Graz8010 Austria

This paper presents a framework for fast and robust motion planning designed to facilitate automated driving. The framework allows for real-time computation even for horizons of several hundred meters and thus enabling automated driving in urban conditions. This is achieved through several features. Firstly, a convenient geometrical representation of both the search space and driving constraints enables the use of classical path planning approach. Thus, a wide variety of constraints can be tackled simultaneously (other vehicles, traffic lights, etc.). Secondly, an exact cost-to-go map, obtained by solving a relaxed problem, is then used by A∗-based algorithm with model predictive flavour in order to compute the optimal motion trajectory. The algorithm takes into account both distance and time horizons. The approach is validated within a simulation study with realistic traffic scenarios. We demonstrate the capability of the algorithm to devise plans both in fast and slow driving conditions, even when full stop is required. Copyright © 2018, The Authors. All rights reserved.

关键词： Motion planning

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Factors influencing message dissemination through social media

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Physical Review E 2018年第6期97卷 062306-062306页

作者： Zeyu Zheng Huancheng Yang Yang Fu Dianzheng Fu Boris Podobnik H. Eugene Stanley Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China Key Laboratory of Network Control System Chinese Academy of Sciences Shenyang 110016 China University of Chinese Academy of Sciences Beijing 100049 China Luxembourg School of Business Luxembourg L-2453 EU Faculty of Information Studies SI-8000 Novo Mesto Slovenia EU Faculty of Civil Engineering University of Rijeka 51000 Rijeka Croatia EU Zagreb School of Economics and Management 10000 Zagreb Croatia EU Center for Polymer Studies Boston University Boston Massachusetts 02215 USA

Online social networks strongly impact our daily lives. An internet user (a “Netizen”) wants messages to be efficiently disseminated. The susceptible-infected-recovered (SIR) dissemination model is the traditional tool for exploring the spreading mechanism of information diffusion. We here test our SIR-based dissemination model on open and real-world data collected from Twitter. We locate and identify phase transitions in the message dissemination process. We find that message content is a stronger factor than the popularity of the sender. We also find that the probability that a message will be forwarded has a threshold that affects its ability to spread, and when the probability is above the threshold the message quickly achieves mass dissemination.

关键词： Dynamics of networks Network phase transitions Network structure

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Visual Navigation Method for Indoor Mobile Robot Based on Extended BoW Model

Visual Navigation Method for Indoor Mobile Robot Based on Ex...

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第十二届中国智能机器人大会

作者： Xianghui Li Xinde Li Mohammad Omar Khyam Chaomin Luo Yingzi Tan Key Laboratory of Measurement and Control of CSE (Ministry of Education) School of Automation Sout Department of Electrical and Computer Engineering Faculty of Engineering National University of Si Department of Electrical and Computer Engineering University of Detroit Mercy Michigan USA

This paper proposes a new navigation method for mobile robots based on an extended BoW (Bag of Words) model for general object recognition in indoor *** SIFT (Scale-invariant Feature Transform) detection algorithm with the GPU (Graphic Processing Unit) acceleration technology is used to describe feature vectors in this ***,in order to add some redundant image information,statistical information of the spatial relationships of all the feature points in an image,i.e.,relative distances and angles,is used to extend the feature vectors in the original BoW ***,the unsupervised SVM (Support Vector Machine) classifier is used to classify ***,in order to navigate conveniently in unknown and dynamic indoor environments,a type of human-robot interaction method based on a hand-drawn semantic map is *** experimental results show that this new navigation technology for indoor mobile robots is very robust and highly effective.

关键词： general object recognition Bag of Words model mobile robot visual navigation

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