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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Shuting Sun Huayu Chen Xuexiao Shao Liangliang Liu Xiaowei Li Bin Hu Gansu Provincial Key Laboratory of Wearable Computing School of Information Science and Engineering Lanzhou University Lanzhou China CAS Center for Excellence in BrainScience and Intelligence Technology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Beijing China Chinese Academy of Sciences Joint Research Center for Cognitive Neurosensor Technology of Lanzhou University & Institute of Semiconductors Beijing China Ministry of Education Engineering Research Center of Open Source Software and Real-Time System (Lanzhou University) Lanzhou China

ISBN: (数字)9781728162157

ISBN: (纸本)9781728162164

This Electroencephalography (EEG)-based research is to explore the effective biomarkers for depression recognition. Resting-state EEG data were collected from 24 major depressive patients (MDD) and 29 normal controls using 128-electrode geodesic sensor net. To better identify depression, we extracted multi-type of EEG features including linear features (L), nonlinear features (NL), functional connectivity features phase lagging index (PLI) and network measures (NM) to comprehensively characterize the EEG signals in patients with MDD. And machine learning algorithms and statistical analysis were used to evaluate the EEG features. Combined multi-types features (All: L+ NL + PLI + NM) outperformed single-type features for classifying depression. Analyzing the optimal features set we found that compared to other type features, PLI occupied the largest proportion of which functional connections in intra-hemisphere were much more than that of in inter-hemisphere. In addition, when using PLI features and All features, high frequency bands (alpha, beta) could achieve obviously higher classification accuracy than low frequency bands (delta, theta). Parietal-occipital lobe in the high frequency bands had great effect in depression identification. In conclusion, combined multi-types EEG features along with a robust classifier can better distinguish depressive patients from normal controls. And intra-hemispheric functional connections might be an effective biomarker to detect depression. Hence, this paper may provide objective and potential electrophysiological characteristics in depression recognition.

关键词： Electroencephalography Depression Feature extraction Electrodes Biomarkers Support vector machines Entropy

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A Kind of new parallax algorithm based on symmetric continuous optimization

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Journal of Physics: Conference Series 2021年第3期1748卷

作者： Kaiwen Jiang Degan Zhang Haixia Xu Key Laboratory of Computer Vision and System (Tianjin University of Technology) Ministry of Education 300384 China Tianjin Key Lab of Intelligent Computing & Novel software Technology Tianjin University of Technology Tianjin China School of Electronic and Information Engineering Tianjin Vocational Institute Tianjin 300410 China

With the fast development of 3D imaginations becomes more and more fascination, multi-view stereo based 3D reconstruction is a significant technique for those application. To facilitate the subsequent processing of 3D reconstruction and reduce the possibility of other algorithms falling into local optimal solutions, attempting to get better and faster performance, a new parallax calculation based on symmetric continuous optimization is proposed in this paper. The algorithm is proposed here will be tested respectively in the same data, in order to certificate the algorithm applied is better than traditional minimize El algorithm.

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Comparison Analysis of 2.4 GHz and Mm-wave V2V Channel Modelling Based on Measurements

Comparison Analysis of 2.4 GHz and Mm-wave V2V Channel Model...

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European Conference on Antennas and Propagation, EuCAP

作者： Hui Wang José Rodríguez-Piñeiro Xuefeng Yin Haowen Wang Ziming Yu School of Electronics and Information Engineering Tongji University Shanghai China China Academy of Science Shanghai Microsystem and Information Technology Research Institute Wireless Network System Research Dept. II WN Huawei Technologies Corporation Chengdu China

In this work, a recently conducted measurement campaign for millimeter wave (mm-wave) and sub-6 GHz vehicle to vehicle (V2V) propagation channel characterization is introduced. Two vehicles carrying a transmitter (Tx) and a receiver (Rx) respectively were following with each other at an average speed of 30 km/h in the mountain area of Zhoushan, Zhejiang Province, China. The measurement was conducted with 25 MHz bandwidth at center frequency of 39 GHz and 2.4 GHz. The channel parameters investigated include the shadowing, fast fading and their auto correlations. 7 kinds of distributions of analytical expressions were used to fit the shadowing and fast fading. The results show that the shadowing and fast fading at 2.4 GHz are more severe than those at 39 GHz. After segmentation, most shadowing and fast fading segments follow gaussian distribution. Furthermore, the shadowing and fast fading at 2.4 GHz have more spacial consistency than those at 39 GHz.

关键词： Fading channels Shadow mapping Antenna measurements Automobiles Horn antennas Frequency measurement Correlation

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A novel method for breast mass segmentation: from superpixel to subpixel segmentation

A novel method for breast mass segmentation: from superpixel...

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作者： Gu, Shenghua Chen, Yi Sheng, Fangqing Zhan, Tianming Chen, Yunjie School of Computer and Software Nanjing University of Information Science and Technology Nanjing210044 China School of Computer Science and Technology Nanjing Normal University Nanjing210023 China Jiangsu Laboratory of Lake Environment Remote Sensing Technologies Huaiyin Institute of Technology Huaiyin223001 China Faculty of Hospitality and Tourism Management Macau University of Science and Technology Macau China School of Humanity and Art Jiangsu Maritime Institute Nanjing211100 China School of Information Engineering Nanjing Audit University Nanjing211815 China School of Math and Statistics Nanjing University of Information Science and Technology Nanjing210044 China

In this paper, an effective method is proposed for breast mass segmentation using a superpixel generation and curve evolution method. The simple linear iterative clustering method and density-based spatial clustering of applications with noise method are applied to generate superpixels in mammograms at first. Thereafter, a region of interesting (ROI) that contains the breast mass is built on the superpixel generation results. Finally, the image patch and the position of the manual labeled seed are used to build the prior knowledge for the level set method driven by the local Gaussian distribution fitting energy and evolve the curve to capture the edge of breast mass in ROI. Experimental results on mammogram data set demonstrate that the proposed method shows superior performance in contrast to some well-known methods in breast mass segmentation. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Gaussian distribution

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Assessing Mental Stress Based on Smartphone Sensing Data: An Empirical Study

Assessing Mental Stress Based on Smartphone Sensing Data: An...

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing, UIC-ATC

作者： Feng Wang Yasha Wang Jiangtao Wang Haoyi Xiong Junfeng Zhao Daqing Zhang Key Laboratory of High Confdence Software Technologies Ministry of Education Beijing China School of Electronics Engineering and Computer Science Peking University Beijing China Peking University Information Technology Institute Tianjin Binhai China National Engineering Research Center of Software Engineering Beijing China Big Data Lab Baidu Research Beijing

ISBN: (数字)9781728140346

ISBN: (纸本)9781728140353

Mental stress is a critical factor affecting one's physical and mental well-being. At the early stage, the effect of stress is often underestimated, while it usually leads to serious issue Lateran. Therefore, it is crucial to detect stress before it evolves into severe problems. Traditional stress detection methods are based on either questionnaires or professional devices, which are time-consuming, costly and intrusive. With the popularity of smartphones embedded with a rich set of sensors, which can capture people's context, such as movement, sound, location and so on, it is an alternative way to access people's behavior by smartphones. Through an empirical study, this paper proposes an automatic and non-intrusive stress detection framework based on smartphone sensing data. First, we construct various discriminative features from multi-modality phone sensing data, in which both absolute and relative features are considered to make the model more personalized. Then, to tackle the challenge of label insufficiency, we further develop a co-training based method for stress level classification. Finally, we evaluate our model based on an open dataset, and the experimental results verify its advantages over other baselines.

关键词： Sensors Stress Feature extraction Psychology Mobile handsets Data models Biomedical monitoring

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Learning low-dimensional temporal representations supplementary material 35

Learning low-dimensional temporal representations supplement...

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35th International Conference on Machine Learning, ICML 2018

作者： Su, Bing Wu, Ying Science and Technology on Integrated Information System Laboratory Institute of Software Chinese Academy of Sciences Beijing China Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL United States

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From fresnel diffraction model to fine-grained human respiration sensing with commodity Wi-Fi devices

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Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous technologies 2018年第1期2卷 1-23页

作者： Zhang, Fusang Zhang, Daqing Xiong, Jie Wang, Hao Niu, Kai Jin, Beihong Wang, Yuxiang Key Laboratory of High Confidence Software Technologies Ministry of Education School of Electronics Engineering and Computer Science Peking University Beijing China State Key Laboratory of Computer Sciences Institute of Software Chinese Academy of Sciences Beijing China College of Information and Computer Sciences University of Massachusetts Amherst United States

Non-intrusive respiration sensing without any device attached to the target plays a particular important role in our everyday lives. However, existing solutions either require dedicated hardware or employ special-purpose signals which are not cost-effective, significantly limiting their real-life applications. Also very few work concerns about the theory behind and can explain the large performance variations in different scenarios. In this paper, we employ the cheap commodity Wi-Fi hardware already ubiquitously deployed around us for respiration sensing. For the first time, we utilize the Fresnel diffraction model to accurately quantify the relationship between the diffraction gain and human target s subtle chest displacement and thus successfully turn the previously considered destructive obstruction diffraction in the First Fresnel Zone (FFZ) into beneficial sensing capability. By not just considering the chest displacement at the frontside as the existing solutions, but also the subtle displacement at the backside, we achieve surprisingly matching results with respect to the theoretical plots and become the first to clearly explain the theory behind the performance distinction between lying and sitting for respiration sensing. With two cheap commodity Wi-Fi cards each equipped with just one antenna, we are able to achieve higher than 98% accuracy of respiration rate monitoring at more than 60% of the locations in the FFZ. Furthermore, we are able to present the detail heatmap of the sensing capability at each location inside the FFZ to guide the respiration sensing so users clearly know where are the good positions for respiration monitoring and if located at a bad position, how to move just slightly to reach a good position. 2018 Association for Computing Machinery.

关键词： Wi-Fi

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Environmentally safe layered crystal produced from hazardous chemical elements: TlPb2BrI4, a new promising detector material

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Journal of Alloys and Compounds 2022年 924卷 1页

作者： Khyzhun, O.Y. Vu, Tuan V. Parasyuk, O.V. Fedorchuk, A.O. Fochuk, P.M. Lavrentyev, A.A. Gabrelian, B.V. Levchuk, Ievgen Matt, Gebhard J. Tedde, Sandro F. Schmidt, Oliver Shrestha, Shreetu Brabec, Christoph J. Kityk, I.V. Piasecki, M. Frantsevych Institute for Problems of Materials Science National Academy of Sciences of Ukraine 3 Krzhyzhanovsky Street KyivUA-03142 Ukraine Faculty of Mechanical - Electrical and Computer Engineering School of Engineering and Technology Van Lang University Ho Chi Minh City Viet Nam Department of Inorganic and Physical Chemistry Lesya Ukrainka Volyn National University 13 Voli Avenue LutskUA-43025 Ukraine Department of Inorganic and Organic Chemistry Lviv National University of Veterinary Medicine and Biotechnologies 50 Pekarska Street Lviv79010 Ukraine Yuriy Fed'kovych Chernivtsi National University 2 Kotziubynskoho Street Chernivtsi58012 Ukraine Department of Electrical Engineering and Electronics Don State Technical University 1 Gagarin Square Rostov-on-Don344010 Russia Department of Computational Technique and Automated System Software Don State Technical University 1 Gagarin Square Rostov-on-Don344010 Russia Martensstrasse 7 Erlangen91058 Germany Siemens Healthineers Technology Center Guenther-Scharowsky-Str. 1 Erlangen91058 Germany Electrical Engineering Department Czestochowa University Technology Armii Krajowej 17 Częstochowa42217 Poland Departmentof Experimental Physics and Information-measuring Technology Lesya Ukrainka Volyn National University Voli Avenue 13 Lutsk43025 Ukraine J.Dlugosz University Częstochowa Armii Krajowej 13/15 Częstochowa42200 Poland

Exploring better Gamma, X-Ray and IR-Mid-R detectors, adequately sensitive to ambient temperatures and environmental conditions, is highly desirable. Therefore, following this path, we present detecting opportunities, based on data of experimental and theoretical investigation of the electronic and optical properties, photocurrent behavior at different bias voltages as well as the reflection for the He-Cd cw laser after irradiation by three different IR laser wavelengths, for recently grown TlPb2BrI4 single crystal with strong anisotropic, two-dimensional (2D) layered structure. The X-ray photoelectron spectroscopy brings data on binding energy values of core levels of TlPb2BrI4 for both as-grown and Ar+-ion-treated crystal surfaces as well as for elucidation of the energy distribution of the valence electronic states. In opposite to well-known IR-detector materials, TlPb2BrI4 crystal surface shows high chemical stability concerning Ar+-ion bombardment. Further, we carry out ab initio band-structure calculations to gain curves of total and partial densities of states and to elucidate the principal optical constants of TlPb2BrI4. The present studies indicate that, in spite of the fact that the TlPb2BrI4 crystal contains two very hazardous/toxic chemical elements, thallium and lead;however, it is chemically stable and reveals very low hygroscopic behavior when being exposed to environmental conditions. © 2022 Elsevier B.V.

关键词： X ray photoelectron spectroscopy

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Personalizing search results using hierarchical RNN with query-aware attention

arXiv

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arXiv 2019年

作者： Ge, Songwei Dou, Zhicheng Jiang, Zhengbao Nie, Jian-Yun Wen, Ji-Rong School of Information Renmin University of China DIRO Université de Montréal Beijing Key Laboratory of Big Data Management and Analysis Methods National Engineering Laboratory of Big Data System Software Beijing Institute of Technology Key Laboratory of Data Engineering and Knowledge Engineering MOE

Search results personalization has become an effective way to improve the quality of search engines. Previous studies extracted information such as past clicks, user topical interests, query click entropy and so on to tailor the original ranking. However, few studies have taken into account the sequential information underlying previous queries and sessions. Intuitively, the order of issued queries is important in inferring the real user interests. And more recent sessions should provide more reliable personal signals than older sessions. In addition, the previous search history and user behaviors should influence the personalization of the current query depending on their relatedness. To implement these intuitions, in this paper we employ a hierarchical recurrent neural network to exploit such sequential information and automatically generate user profile from historical data. We propose a query-aware attention model to generate a dynamic user profile based on the input query. Significant improvement is observed in the experiment with data from a commercial search engine when compared with several traditional personalization models. Our analysis reveals that the attention model is able to attribute higher weights to more related past sessions after fine training. Copyright © 2019, The Authors. All rights reserved.

关键词： Search engines

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Dynamic group behavior analysis and its application in network abnormal behavior detection 12th

Dynamic group behavior analysis and its application in netwo...

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12th International Conference on Communications and Networking in China, CHINACOM 2017

作者： Tong, Yan Zhang, Jian Chen, Wei Xu, Mingdi Qin, Tao System Research Department Wuhan Digital Engineering Institute 718 Luoyu Road Hongshan District Wuhan China System Software Department Wuhan Digital Engineering Institute 718 Luoyu Road Hongshan District Wuhan China School of Electronic and Information Engineering Xi’an Jiaotong University 28 Xianning West Road Xi’anShaanxi China

ISBN: (纸本)9783319781389

Focus on the difficulty of large-scale network traffic monitoring and analysis, this paper proposed the concepts of Group Behavior Flow model to aggregate traffic packets and perform abnormal behavior detection. Based on the flow model the pivotal traffic metrics can be extracted while the number of flow records are reduced significantly. Secondly, we employ the graph model to capture the traffic feature distribution between different group users. And optical flow analysis methods are proposed to extract the dynamic behavior changing features between different groups and achieve the goal of abnormal behavior detection. The experimental results based on actual traffic traces show that the methods proposed in this paper can capture the traffic features effectually in the current 10 Gbps network environment, and achieve the goal of abnormal behavior detection and abnormal source location, which is very important for traffic management. © ICST institute for Computer Sciences, Social Informatics and Telecommunications engineering 2018.

关键词： Optical flows

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