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2016 IEEE National Aerospace and Electronics Conference and Ohio Innovation Summit, NAECON-OIS 2016

作者： Al-Muraeb, Ahmed Abdel-Aty-Zohdy, Hoda Microelectronics and Bio-Inspired Systems Design Lab Department of Electrical and Computer Engineering Oakland University RochesterMI48309-4401 United States

ISBN: (纸本)9781509034413

Based on our work [1] we present a study for dimensions (number of FBG sections) in our novel APU-BA. C-band single-wavelength, and eye-safe dual-wavelength Triangular Spectrum Fiber Bragg Gratings (TS-FBG) of chosen lengths are considered. Setting the dimensions in APU-BA (and any swarm-based optimization algorithm) is critical. Optimum number of dimensions is reported. © 2016 IEEE.

关键词： Refractive index

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Users’ perceived control, trust and expectation on privacy settings of smartphone 9th

Users’ perceived control, trust and expectation on privacy ...

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9th International Symposium on Cyberspace Safety and Security, CSS 2017

作者： Zhou, Yun Raake, Alexander Xu, Tao Zhang, Xuyun School of Education Shaanxi Normal University Xi’anShaanxi710062 China Audiovisual Technology Group Institute for Media Technology University of Technology Ilmenau Ilmenau98693 Germany School of Software and Microelectronics Northwestern Polytechnical University Xi’anShaanxi710072 China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Xi’anShaanxi710054 China Department of Electrical and Computer Engineering University of Auckland Auckland1010 New Zealand

ISBN: (纸本)9783319694702

A common issue is that a large number of authorized apps use important and sensitive personal information without arousing users’ full awareness. Existing schemes for privacy protection on smartphones try to provide users with privacy settings to control privacy leakage. Privacy settings on smartphone are intended to inform users about risks of privacy leakage and let users take over control of smartphone. Therefore, it is essential to understand and measure how much users perceive and trust these settings. To this end, we design and conduct a fine-grained online survey with 222 respondents. We collect the demographics as well as users’ smartphone usage, covering not only participants’ basic background information like age, gender, job, but also time of smartphone use per day, respective importance and sensitivity level of personal data, and their smartphone OSs. In this paper, we investigate users’ current privacy perception and protection on smartphone in different groups, discussing participants’ responses to (1) Rating the importance and sensitivity of personal information;(2) Trust on existing privacy protection;(3) Perceived control on smartphone;(4) Frequency of searching privacy knowledge;(5) Concerns about manufacturer and third-party company’s behaviors on personal data and decision. © 2017, Springer International Publishing AG.

关键词： Surveys

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Experimental observation of the topological structure of exceptional points in an ultrathin hybridized metamaterial

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Physical Review A 2017年第6期96卷 063823-063823页

作者： Ming Kang Weiren Zhu Ivan D. Rukhlenko College of Physics and Materials Science Tianjin Normal University Tianjin 300387 China Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China Modeling and Design of Nanostructures Laboratory ITMO University Saint Petersburg 197101 Russia Department of Electrical and Computer Systems Engineering Monash University Clayton Victoria 3800 Australia

The exceptional point (EP), which is one of the most important branch-type singularities exclusive to non-Hermitian systems, has been observed recently in various synthetic materials, giving rise to counterintuitive phenomena due to the nontrivial topology of the EP. Here, we present a direct experimental observation of the topological structure of the EPs via the angle-resolved transmission measurement of a hybridized metamaterial. Both eigenvalues and eigenvectors show branch-point singularities in the investigated biparametric space of frequency and incident angle. Importantly, the angle-resolved transmission coefficients provide all the information about the eigenvalues as well as the corresponding eigenvectors in the biparametric space, revealing the nontrivial topological structure of the EP, such as mode switching and the topological phase for a parameter loop encircling the EP. It is shown that the appearance of the EP in the scattering matrix is related directly to the perfect unidirectional transmission and the chirality of the EP corresponds to the maximum or minimum value of the asymmetric factor. Our investigation uncovers the capabilities of metamaterials for exploring the physics of EPs and their potential for having extreme optical properties, which provide potential applications in the spectral band ranging from microwaves to visible frequencies.

关键词： Metamaterials

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Moiré excitons in Van der Waals heterostructures

arXiv

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arXiv 2018年

作者： Tran, Kha Moody, Galan Wu, Fengcheng Lu, Xiaobo Choi, Junho Singh, Akshay Embley, Jacob Zepeda, André Campbell, Marshall Kim, Kyounghwan Rai, Amritesh Autry, Travis Sanchez, Daniel A. Taniguchi, Takashi Watanabe, Kenji Lu, Nanshu Banerjee, Sanjay K. Tutuc, Emanuel Yang, Li MacDonald, Allan H. Silverman, Kevin L. Li, Xiaoqin Department of Physics Center for Complex Quantum Systems University of Texas at Austin AustinTX78712 United States National Institute of Standards & Technology BoulderCO80305 United States Materials Science Division Argonne National Laboratory ArgonneIL60439 United States Department of Physics Washington University in St. Louis St. LouisMI63136 United States Microelectronics Research Center Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78758 United States Department of Aerospace Engineering and Engineering Mechanics University of Texas at Austin AustinTX78712 United States National Institute of Material Science 1-1 Namiki Tsukuba Ibaraki205-0044 Japan Texas Materials Institute University of Texas at Austin AustinTX78712 United States Department of Material Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States

In van der Waals (vdW) heterostructures formed by stacking two monolayer semiconductors, lattice mismatch or rotational misalignment introduces an in-plane moiré superlattice. While it is widely recognized that a moiré superlattice can modulate the electronic band structure and lead to novel transport properties including unconventional superconductivity and insulating behavior driven by correlations, its influence on optical properties has not been investigated experimentally. We present spectroscopic evidence that interlayer excitons are confined by the moiré potential in a high-quality MoSe2/WSe2heterobilayer with small rotational twist. A series of interlayer exciton resonances with either positive or negative circularly polarized emission is observed in photoluminescence, consistent with multiple exciton states confined within the moiré potential. The recombination dynamics and temperature dependence of these interlayer exciton resonances are consistent with this interpretation. These results demonstrate the feasibility of engineering artificial excitonic crystals using vdW heterostructures for nanophotonics and quantum information applications. Copyright © 2018, The Authors. All rights reserved.

关键词： Van der Waals forces

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Author Correction: Record thermopower found in an IrMn-based spintronic stack

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Nature communications 2020年第1期11卷 2496页

作者： Sa Tu Timothy Ziman Guoqiang Yu Caihua Wan Junfeng Hu Hao Wu Hanchen Wang Mengchao Liu Chuanpu Liu Chenyang Guo Jianyu Zhang Marco A Cabero Z Youguang Zhang Peng Gao Song Liu Dapeng Yu Xiufeng Han Ingrid Hallsteinsen Dustin A Gilbert Mamoru Matsuo Yuichi Ohnuma Peter Wölfle Kang L Wang Jean-Philippe Ansermet Sadamichi Maekawa Haiming Yu Fert Beijing Institute BDBC School of Microelectronics Beihang University 100191 Beijing China. Institut Laue-Langevin 38042 Grenoble France. Université de Grenobles-Alpes and CNRS LPMMC 38042 Grenoble France. Kavli Institute for Theoretical Sciences University of Chinese Academy of Sciences 100190 Beijing China. Department of Electrical Engineering University of California Los Angeles CA 90095 USA. Beijing National Laboratory for Condensed Matter Physics Institute of Physics University of Chinese Academy of Sciences Chinese Academy of Sciences 100190 Beijing China. Institute of Physics Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland. Electron Microscopy Laboratory School of Physics Peking University 100871 Beijing China. Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics Southern University of Science and Technology (SUSTech) 518055 Shenzhen China. International Center for Quantum Materials School of Physics Peking University 100871 Beijing China. Collaborative Innovation Center of Quantum Matter 100871 Beijing China. Department of Electronic Systems Norwegian University of Science and Technology Trondheim 7491 Norway. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA. Material Science and Engineering Department University of Tennessee Knoxville TN 37996 USA. RIKEN Center for Emergent Matter Science (CEMS) Wako 351-0198 Japan. Institute for Theory of Condensed Matter Karlsruhe Institute of Technology 76049 Karlsruhe Germany. Fert Beijing Institute BDBC School of Microelectronics Beihang University 100191 Beijing China. haiming.yu@***.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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Controllable optical response by modifying the gain and loss of a mechanical resonator and cavity mode in an optomechanical system

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Physical Review A 2017年第1期95卷 013843-013843页

作者： Yu-Long Liu Rebing Wu Jing Zhang Şahin Kaya Özdemir Lan Yang Franco Nori Yu-xi Liu Institute of Microelectronics Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology (TNList) Beijing 100084 China Department of Automation Tsinghua University Beijing 100084 China Department of Electrical and Systems Engineering Washington University St. Louis Missouri 63130 USA CEMS RIKEN Saitama 351-0198 Japan Department of Physics The University of Michigan Ann Arbor Michigan 48109-1040 USA

We theoretically study a strongly driven optomechanical system which consists of a passive optical cavity and an active mechanical resonator. When the optomechanical coupling strength is varied, phase transitions, which are similar to those observed in PT-symmetric systems, are observed. We show that the optical transmission can be controlled by changing the gain of the mechanical resonator and loss of the optical cavity mode. Especially, we find that (i) for balanced gain and loss, optical amplification and absorption can be tuned by changing the optomechanical coupling strength through a control field; (ii) for unbalanced gain and loss, even with a tiny mechanical gain, both optomechanically induced transparency and anomalous dispersion can be observed around a critical point, which exhibits an ultralong group delay. The time delay τ can be optimized by regulating the optomechanical coupling strength through the control field, and it can be improved up to several orders of magnitude (τ∼2ms) compared to that of conventional optomechanical systems (τ∼1μs). The presence of mechanical gain makes the group delay more robust to environmental perturbations. Our proposal provides a powerful platform to control light transport using a PT-symmetric-like optomechanical system.

关键词： Electromagnetically induced transparency Light propagation, transmission & absorption Optical microcavities Photon statistics

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Sliding Mode Control Technique for Multi-switching Synchronization of Chaotic systems

Sliding Mode Control Technique for Multi-switching Synchroni...

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

作者： Shikha Singh Ahmad Taher Azar Adel Ouannas Quanmin Zhu Weicun Zhang Jing Na Faculty of Natural Sciences Jamia Millia Islamia Faculty of Computers and Information Benha UniversityEgypt and Nile University Laboratory of Mathematics Informatics and Systems (LAMIS) University of Larbi Tebessi Department of Engineering Design and Mathematics University of the West of England School of Automation and Electrical Engineering University of Science and Technology Beijing

In this manuscript,a sliding mode control technique is proposed for multi-switching synchronization of chaotic systems in which state variables of a master system are synchronized with different state variables of a slave *** on the sliding mode control technique and Lyapunov stability theory,the suitable controllers are designed for different *** implement this methodology,Lorenz chaotic system is taken as a master system and Pehlivan chaotic system is taken as a slave *** results are carried out to justify the theoretical results and revealed that the error dynamics tends to zero and required synchronization is obtained.

关键词： Sliding Mode Control Chaos control Lya punov stability Multi-Switching Synchronization

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The Liver Tumor Segmentation Benchmark (LiTS)

arXiv

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arXiv 2019年

作者： Bilic, Patrick Christ, Patrick Li, Hongwei Bran Vorontsov, Eugene Ben-Cohen, Avi Kaissis, Georgios Szeskin, Adi Jacobs, Colin Mamani, Gabriel Efrain Humpire Chartrand, Gabriel Lohöfer, Fabian Holch, Julian Walter Sommer, Wieland Hofmann, Felix Hostettler, Alexandre Lev-Cohain, Naama Drozdzal, Michal Amitai, Michal Marianne Vivanti, Refael Sosna, Jacob Ezhov, Ivan Sekuboyina, Anjany Navarro, Fernando Kofler, Florian Paetzold, Johannes C. Shit, Suprosanna Hu, Xiaobin Lipková, Jana Rempfler, Markus Piraud, Marie Kirschke, Jan Wiestler, Benedikt Zhang, Zhiheng Hülsemeyer, Christian Beetz, Marcel Ettlinger, Florian Antonelli, Michela Bae, Woong Bellver, Míriam Bi, Lei Chen, Hao Chlebus, Grzegorz Dam, Erik B. Dou, Qi Fu, Chi-Wing Georgescu, Bogdan Giró-I-Nieto, Xavier Gruen, Felix Han, Xu Heng, Pheng-Ann Hesser, Jürgen Moltz, Jan Hendrik Igel, Christian Isensee, Fabian Jäger, Paul Jia, Fucang Kaluva, Krishna Chaitanya Khened, Mahendra Kim, Ildoo Kim, Jae-Hun Kim, Sungwoong Kohl, Simon Konopczynski, Tomasz Kori, Avinash Krishnamurthi, Ganapathy Li, Fan Li, Hongchao Li, Junbo Li, Xiaomeng Lowengrub, John Ma, Jun Maier-Hein, Klaus Maninis, Kevis-Kokitsi Meine, Hans Merhof, Dorit Pai, Akshay Perslev, Mathias Petersen, Jens Pont-Tuset, Jordi Qi, Jin Qi, Xiaojuan Rippel, Oliver Roth, Karsten Sarasua, Ignacio Schenk, Andrea Shen, Zengming Torres, Jordi Wachinger, Christian Wang, Chunliang Weninger, Leon Wu, Jianrong Xu, Daguang Yang, Xiaoping Yu, Simon Chun-Ho Yuan, Yading Yue, Miao Zhang, Liping Cardoso, Jorge Bakas, Spyridon Braren, Rickmer Heinemann, Volker Pal, Christopher Tang, An Kadoury, Samuel Soler, Luc van Ginneken, Bram Greenspan, Hayit Joskowicz, Leo Menze, Bjoern Department of Informatics Technical University of Munich Germany Department of Quantitative Biomedicine University of Zurich Switzerland Ecole Polytechnique de Montréal Canada Department of Medical Imaging Radboud University Medical Center Nijmegen Netherlands Department of Biomedical Engineering Tel-Aviv University Israel Germany Pattern Analysis and Learning Group Department of Radiation Oncology Heidelberg University Hospital Heidelberg Germany Philips Research China Philips China Innovation Campus Shanghai China School of Biomedical Engineering & Imaging Sciences King0s College London London United Kingdom Institute for AI in Medicine Technical University of Munich Germany Department of Computer Science Guangdong University of Foreign Studies China Institute for diagnostic and interventional radiology Klinikum rechts der Isar Technical University of Munich Germany Institute for Diagnostic and Interventional Neuroradiology Klinikum Rechts der Isar Technical University of Munich Germany Department of Hepatobiliary Surgery The Affiliated Drum Tower Hospital Nanjing University Medical School China Department of Computing Imperial College London London United Kingdom Institute for Tissue Engineering and Regenerative Medicine Helmholtz Zentrum München Neuherberg Germany Brigham and Women's Hospital Harvard Medical School United States School of Computer Science and Engineering The Hebrew University of Jerusalem Israel University of Pennsylvania PA United States Pte. Ltd. Singapore Medical Imaging and Reconstruction Lab Department of Engineering Design Indian Institute of Technology Madras India Sensetime Shanghai China Department of Radiology Perelman School of Medicine University of Pennsylvania United States Department of Pathology and Laboratory Medicine Perelman School of Medicine University of Pennsylvania PA United States Co. Ltd China MontréalQC Canada Department of Radiology Radiation Oncology and Nuclear Medicine University of Montréal

In this work, we report the set-up and results of the Liver Tumor Segmentation Benchmark (LiTS), which was organized in conjunction with the IEEE International Symposium on Biomedical Imaging (ISBI) 2017 and the International Conferences on Medical Image Computing and Computer-Assisted Intervention (MICCAI) 2017 and 2018. The image dataset is diverse and contains primary and secondary tumors with varied sizes and appearances with various lesion-to-background levels (hyper-/hypo-dense), created in collaboration with seven hospitals and research institutions. Seventy-five submitted liver and liver tumor segmentation algorithms were trained on a set of 131 computed tomography (CT) volumes and were tested on 70 unseen test images acquired from different patients. We found that not a single algorithm performed best for both liver and liver tumors in the three events. The best liver segmentation algorithm achieved a Dice score of 0.963, whereas, for tumor segmentation, the best algorithms achieved Dices scores of 0.674 (ISBI 2017), 0.702 (MICCAI 2017), and 0.739 (MICCAI 2018). Retrospectively, we performed additional analysis on liver tumor detection and revealed that not all top-performing segmentation algorithms worked well for tumor detection. The best liver tumor detection method achieved a lesion-wise recall of 0.458 (ISBI 2017), 0.515 (MICCAI 2017), and 0.554 (MICCAI 2018), indicating the need for further research. LiTS remains an active benchmark and resource for research, e.g., contributing the liver-related segmentation tasks in http://***/. In addition, both data and online evaluation are accessible via ***. © 2019, CC BY-NC-ND.

关键词： Deep learning

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On the stability of static poisson networks under random access

On the stability of static poisson networks under random acc...

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作者： Zhong, Yi Haenggi, Martin Quek, Tony Q.S. Zhang, Wenyi Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei230027 China Information Systems Technology and Design Pillar Singapore University of Technology and Design Singapore487372 Singapore Department of Electrical Engineering University of Notre Dame Notre DameIN46556 United States Key Laboratory of Wireless-Optical Communications Chinese Academy of Sciences Hefei230027 China

We investigate the stable packet arrival rate region of a discrete-time slotted random access network, where the sources are distributed as a Poisson point process. Each of the sources in the network has a destination at a given distance and a buffer of infinite capacity. The network is assumed to be random but static, i.e., the sources and the destinations are placed randomly and remain static during all the time slots. We employ tools from queueing theory as well as point process theory to study the stability of this system using the concept of dominance. The problem is an instance of the interacting queues problem, further complicated by the Poisson spatial distribution. We obtain sufficient conditions and necessary conditions for stability. Numerical results show that the gap between the sufficient conditions and the necessary conditions is small when the access probability, the density of transmitters, or the SINR threshold is small. The results also reveal that a slight change of the arrival rate may greatly affect the fraction of unstable queues in the network. © 1972-2012 IEEE.

关键词： Queueing theory

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Ultra Wideband Slot-loaded, Dielectric-filled Discone Antenna for WLAN Applications

Ultra Wideband Slot-loaded, Dielectric-filled Discone Antenn...

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European Conference on Antennas and Propagation

作者： D. Tran M. Wang A. Yarovoy Microwave Sensing Signals and Systems Laboratory Department of Microelectronics Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 The Netherlands

ISBN: (纸本)9781509022342

Novel antenna design for WLAN applications comply IEEE 802.11 a/b/g/n protocol is proposed. The design is based on a dielectric filled discone antenna. The antenna is characterized by omnidirectional radiation patterns in the azimuthal plane and similar to each other radiation patterns at both WLAN operational bands at 2.4GHz and 5.5GHz in the elevation plane in the angular sector from 40° to 60°.

关键词： UWB WLAN dielectric filled discone antenna omni-directional slot-loadding wireless local area network (WLAN) Ultra wideband technologies Radiation patterns ANTENNA antennae antenna design

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