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International Conference on Computational Intelligence and Security

作者： Xingsi Xue Junfeng Chen Aihong Ren College of Information Science and Engineering Intelligent Information Processing Research Center Fujian Key Lab for Automotive Electronics and Electric Drive Fujian Provincial Key Laboratory of Big Data Mining and Applications Fujian University of Technology Fuzhou China College of IOT Engineering Hohai University ChanZhou China School of Mathematics and Information Science Baoji University of Arts and Sciences Baoji China

ISBN: (数字)9781728160924

ISBN: (纸本)9781728160931

Since different ontologies are mostly developed independently, establishing meaningful links between their entities, so-called ontology matching, is critical to ensure their communication. Due to the complexity of the ontology matching problem, Evolutionary Algorithm (EA) can present a good methodology for determining ontology alignments. However, since none of the similarity measure can distinguish all the identical ontology entities in any context, ontology alignments generated by the automatic matching tools should be validated by the users to ensure their qualities. To improve the quality of the ontology alignment, in this work, a similarity measure is first proposed to calculate the similarity value of two ontology entities; then, an optimal model for ontology matching problem is constructed; after that, an EA-based automatic matcher is presented to solve the ontology matching problem, which can also adaptively determine the timing of getting user involved; and finally, the ontology concept hierarchy graph based reasoning approaches are proposed to tradeoff the user's workload and his work's effect. The experiment is conducted on the Interactive track provided by the Ontology Alignment Evaluation Initiative (OAEI), and the comparisons with OAEI's participants show the effectiveness of our proposal.

关键词： Ontologies Graph theory Pattern matching Evolutionary computation

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Elliptical measurement of current sensing based on helical long period grating written in polarization-maintaining fiber

Elliptical measurement of current sensing based on helical l...

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Optical Fiber Sensors, OFS 2018

作者： Shen, Huixin Liu, Yunqi Jiang, Chen Mou, Chengbo Wang, Tingyun Key Lab of Specialty Fiber Optics and Optical Access Networks Shanghai Institute for Advanced Communication and Data Science School of Communication and Information Engineering Shanghai University 149 Yanchang Road Shanghai200072 China

We report the measurement of the Faraday effect of helical long period grating written in polarization-maintaining fiber. The elliptical polarized light was used to measure Faraday rotation angle, which shows a higher... 详细信息

ISBN: (纸本)9781943580507

关键词： Polarization-maintaining fiber

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On privacy protection of latent dirichlet allocation model training

arXiv

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arXiv 2019年

作者： Zhao, Fangyuan Ren, Xuebin Yang, Shusen Yang, Xinyu School of Computer Science and Technology Xi'an Jiaotong University China National Engineering Laboratory for Big Data Analytics Xi'an Jiaotong University China Ministry of Education Key Lab For Intelligent Networks and Network Security Xi'an Jiaotong University China

Latent Dirichlet Allocation (LDA) is a popular topic modeling technique for discovery of hidden semantic architecture of text datasets, and plays a fundamental role in many machine learning applications. However, like many other machine learning algorithms, the process of training a LDA model may leak the sensitive information of the training datasets and bring significant privacy risks. To mitigate the privacy issues in LDA, we focus on studying privacy-preserving algorithms of LDA model training in this paper. In particular, we first develop a privacy monitoring algorithm to investigate the privacy guarantee obtained from the inherent randomness of the collapsed gibbs sampling (CGS) process in a typical LDA training algorithm on centralized curated datasets. Then, we further propose a locally private LDA training algorithm on crowdsourced data to provide local differential privacy for individual data contributors. The experimental results on real-world datasets demonstrate the effectiveness of our proposed algorithms. Copyright © 2019, The Authors. All rights reserved.

关键词： Statistics

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A Novel Spun Photonic Crystal Fibre with Amoeba Shape

A Novel Spun Photonic Crystal Fibre with Amoeba Shape

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Yanhua Luo Binbin Yan John Canning Ghazal Tafti Shuai Wang Wenyu Wang Yuan Tian Kevin Cook Vigneswaran Dhasarathan Gang-Ding Peng Photonics & Optical Communications School of Electrical Engineering UNSW Sydney Australia State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China interdisciplinary Photonic Laboratories (iPL) Tech Lab School of Electrical and Data Engineering University of Technology Sydney Sydney Australia Department of Electronics and Communication Engineering Sri Krishna College of Technology Coimbatore Tamilnadu India

A novel spun photonic crystal fibre with Amoeba shape has been fabricated based on asymmetric self-pressurization. Asymmetry growth dynamics with fibre drawing has been investigated.

ISBN: (纸本)9781943580705

A novel spun photonic crystal fibre with Amoeba shape has been fabricated based on asymmetric self-pressurization. Asymmetry growth dynamics with fibre drawing has been investigated.

关键词： Fiber design High power fiber lasers High power lasers Hollow core fibers Photonic crystal fibers Structured optical fibers

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Erratum: “Spin wave propagation in a ferrimagnetic thin film with perpendicular magnetic anisotropy” [Appl. Phys. Lett. 117, 232407 (2020)]

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Applied Physics Letters 2021年第2期118卷

作者： Lutong Sheng Yawen Liu Jilei Chen Hanchen Wang Jianyu Zhang Mingfeng Chen Ji Ma Chuanpu Liu Sa Tu Ce-Wen Nan Haiming Yu 1Fert Beijing Institute School of Integrated Circuit Science and Engineering Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Beijing 100191 China 2Department of Physics and Astronomy University of California Riverside California 92521 USA 3State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

In the original article,1 the line spectrum in Fig. 2(b) is missing. The correct Fig. 2(b), given here, shows how we get the frequency difference from this spec

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Non-volatile optical switch based on a GST-loaded directional coupler 3

Non-volatile optical switch based on a GST-loaded directiona...

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3rd Optoelectronics Global Conference, OGC 2018

作者： Zhang, Hanyu Zhou, Linjie Lu, Liangjun Chen, Jianping Rahman, B.M.A. Shanghai Institute for Advanced Communication and Data Science Shanghai Key Lab of Navigation and Location Services State Key Laboratory of Advanced Optical Communication Systems and Networks SJTU Shanghai China Department of Electrical and Electronic Engineering University of London London United Kingdom

ISBN: (纸本)9781538673973

We present a non-volatile optical switch based on a directional coupler comprising a silicon-Ge2Sb2Te5 (GST) hybrid waveguide. The non-volatility of GST makes it attractive for reducing static power consumption in optical switching. Experimental results show that the optical switch has an extinction ratio of >20 dB in the bar state and >25 dB in the cross state around 1578 nm wavelength. The insertion loss is 2 dB and 7 dB for the bar and cross states, respectively. © 2018 IEEE.

关键词： Phase change materials

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Optical computing and logic operation with GST-enabled silicon photonics

Optical computing and logic operation with GST-enabled silic...

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Asia Communications and Photonics Conference

作者： Hanyu Zhang Linjie Zhou Liangjun Lu Jianping Chen B. M. A. Rahman State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Shanghai Institute for Advanced Communication and Data Science Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Electrical and Electronic Engineering City University of London London EC 1V 0HB U.K

We report a Si-Ge_2Sb_2Te_5 hybrid photonic device for in-memory multiplication and logic operation. The phase change of Ge_2Sb_2Te_5 can be induced by electrical pulses, optical pulses, or both, extending its applica... 详细信息

ISBN: (纸本)9781943580705

关键词： Germanium Integrated optics Multimode interference Refractive index Silicon photonics Transmittance

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AN EMPIRICAL FEASIBILITY STUDY OF SOCIETAL RISK CLASSIFICATION TOWARD BBS POSTS

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Journal of Systems Science and Systems engineering 2018年第6期27卷 709-726页

作者： Jindong Chen Xiaoji Zhou Xijin Tang School of Economics and Management Beifing Information Science &Technology University Beifing 100192 China China Academy of Aerospace Systems Science and Engineering Beijing 100048 China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Beijing Key Lab of Green Development Decision Based on Big Data Beijing 100192 China University of Chinese Academy of Sciences Beijing 100049 China

Societal risk classification is the fundamental issue for online societal risk monitoring. To show the challenge and feasibility of societal risk classification toward BBS posts, an empirical analysis is implemented in this paper. Through effectiveness analysis, Support Vector Machine based on Bag-Of-Words （BOW-SVM） is adopted for challenge validation, and the distributed document embeddings of BBS posts generated by Paragraph Vector are applied to feasibility study. Based on BOW-SVM, cross-validations of BBS posts labeled by different groups and annotators are conducted. The big fluctuation of cross-validation results indicates the differences of individual risk perceptions, which brings more challenges to societal risk classification. Furthermore, based on the distributed document embeddings of BBS posts, the pairwise similarities of more than 300 thousands BBS posts from different societal risk categories are compared. The higher similarities of BBS posts in the same societal risk category reveal that BBS posts in the same societal risk category share more features than BBS posts in different categories, which manifests the feasibility of societal risk classification of BBS posts, and also reflects the possibility to improve the performance of societal risk monitoring.

关键词： Societal risk classification Tianya Forum cross validation pairwise similarity individual risk perception

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Supramolecular engineering of Cathode Materials for Aqueous Zinc-ion Energy Storage Devices: Novel Benzothiadiazole Functionalized Two-Dimensional Olefin-Linked COFs

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Angewandte Chemie 2023年第10期135卷

作者： Dr. Haijun Peng Senhe Huang Dr. Verónica Montes-García Dr. Dawid Pakulski Dr. Haipeng Guo Dr. Fanny Richard Prof. Xiaodong Zhuang Prof. Paolo Samorì Dr. Artur Ciesielski Université de Strasbourg CNRS Institut de Science et d'Ingénierie Supramoléculaires 8 allée Gaspard Monge 67000 Strasbourg France Contribution: Data curation (lead) Investigation (lead) Writing - original draft (lead) Writing - review & editing (lead) The Soft2D Lab State Key Laboratory of Metal Matrix Composites Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 200240 Shanghai China Centre for Advanced Technologies Adam Mickiewicz University Uniwersytetu Poznańskiego 10 61-614 Poznań Poland Adam Mickiewicz University Foundation Poznań Science and Technology Park Rubież 46 61-612 Poznań Poland

Two-dimensional covalent organic frameworks (COFs) have emerged as promising materials for energy storage applications exhibiting enhanced electrochemical performance. While most of the reported organic cathode materials for zinc-ion batteries use carbonyl groups as electrochemically-active sites, their high hydrophilicity in aqueous electrolytes represents a critical drawback. Herein, we report a novel and structurally robust olefin-linked COF-TMT-BT synthesized via the aldol condensation between 2,4,6-trimethyl-1,3,5-triazine (TMT) and 4,4′-(benzothiadiazole-4,7-diyl)dibenzaldehyde (BT), where benzothiadiazole units are explored as novel electrochemically-active groups. Our COF-TMT-BT exhibits an outstanding Zn 2+ storage capability, delivering a state-of-the-art capacity of 283.5 mAh g −1 at 0.1 A g −1 . Computational and experimental analyses reveal that the charge-storage mechanism in COF-TMT-BT electrodes is based on the supramolecularly engineered and reversible Zn 2+ coordination by the benzothiadiazole units.

关键词： Charge Storage Mechanism Covalent Organic Frameworks Energy Storage Devices Functional Porous Materials Zinc-Ion Batteries

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VUSphere: Visual Analysis of Video Utilization in Online Distance Education 13

VUSphere: Visual Analysis of Video Utilization in Online Dis...

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13th IEEE Conference on Visual Analytics Science and Technology, VAST 2018

作者： He, Huan Zheng, Oinghua Dong, Bo Key Laboratory of Intelligent Networks and Network Security Ministry of Education Xi'An Jiaotong University China School of Electronic and Information Engineering Xi'An Jiaotong University China School of Continuing Education Xi'An Jiaotong University China National Engineering Lab for Big Data Analytics Xi'An Jiaotong University China

ISBN: (纸本)9781538668610

Online Distance Education (ODE) provides massive course videos of various specialties for students across the country to learn professional knowledge anytime and anywhere. Analyzing the utilization of these videos from user log data can help academics better understand the learning process of students, evaluate the quality of service provided by regional learning centers, and improve the quality of program curriculum in the future. However, due to the lack of comparable indicators, it is a great challenge to discover the utilization patterns of massive videos and analyze the learning process of large-scale student population from learning log data. In this paper, we introduce a visual analytics system, called VUSphere, to explore the video utilization from multiple perspectives with two proposed indicators. This system offers three coordinated views: A spherical layout overview to depict the overall utilization distribution of videos, courses, and students;a detailed statistics view with four panels to present video utilization statistics of each element from multiple perspectives;and a comparison view to examine the differences in individual elements. Based on the real dataset from our ODE school, several patterns related to video utilization and enrollment are found in the case study with our domain experts. © 2018 IEEE.

关键词： Students

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