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Rehabilitation Engineering and Assistive technology (i-CREATe), International Convention on

作者： Sihong Wei Lianchi Huang Bin Wen Chong Shen Yufei Chen Jin Xu Key Laboratory of Biomedical Information Engineering of Ministry of Education Institute of Health and Rehabilitation Science School of Life Science and Technology Xi'an Jiaotong University Xi'an China Sichuan Digital Economy Industry Development Research Institute Chengdu China

ISBN: (数字)9798350355154

ISBN: (纸本)9798350355161

Upper limb movements can be associated with activation of both sensorimotor cortices on functional MRI. The neurophysiological significance of the ipsilateral activation remains unclear. This study aimed to understand changes in ipsilateral motor cortical (iM1) activation during finger and shoulder movements. Fourteen healthy subjects were recruited and were asked to perform two experiments in left- and right-hand. Experiment 1 required the execution of hand clenching task, and experiment 2 consisted of shoulder forward flexion and elbow flexion. During motor execution, electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) and surface electromyography (sEMG) data were simultaneously recorded. EEG analysis was employed to assess event-related desynchronization (ERD), fNIRS to measure blood oxygen concentrations (oxygenated hemoglobin, HbO) in the brain, and sEMG to analyze the electrical activity of muscles during movement. ERD occurred clearly bilaterally during both shoulder and elbow movements compared to hand clenching. In all left-hand conditions, the HbO was significantly higher contralaterally than ipsilaterally (P < 0.05). Additionally, hand clenching exhibited significantly higher HbO and muscle electrical activity compared to shoulder and elbow movements (P < 0.05). Ipsilateral ERD and HbO during execution appear to reflect the excitability of proximal muscle and the level of muscle activation, respectively. This information may be valuable for comprehensively studying movement disorders, like those in post-stroke hemiplegic patients.

关键词： Magnetic resonance imaging Electric variables measurement Muscles Motors Electroencephalography Electromyography Brain-computer interfaces Functional near-infrared spectroscopy Elbow Blood

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DIGITAL TWIN AS A TRANSFORMATIVE APPROACH TO CLASSICAL FORCE MEASUREMENT SYSTEMS 24

DIGITAL TWIN AS A TRANSFORMATIVE APPROACH TO CLASSICAL FORCE...

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24th IMEKO TC3 Conference on Measurement of Force, Mass and Torque 2022, Together with the 14th TC5 Conference on the Measurement of Hardness, the 6th TC16 Conference on Pressure and Vacuum Measurement, and the 5th TC22 Conference on Vibration Measurement

作者： Solis, M.J.A. Giusca, C. Goel, S. Industrial Technology Development Institute Department of Science and Technology Bicutan Taguig City1631 Philippines Cranfield University Bedfordshire CranfieldMK43 0AL United Kingdom London South Bank University LondonSE10AA United Kingdom

ISBN: (纸本)9781713870203

Like any other measuring device, load cells are vital in ensuring that products meet quality and safety requirements;therefore, they must always be accurate and reliable. Creep affects measurement results and the useful life of load cells but is not well understood. Digital twins create a virtual representation of an instrument that can be used to understand, monitor, and predict load cell behaviour. This study found that the significant source of creep originates from the strain gauge's carrier matrix and that the Larson-Miller Parameter equation can be used to support the digital twin development of the load cell. © 2023 *** All Rights Reserved.

关键词： Creep

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Symmetric Wide Slot Ground with Triangle Tunable Patch Antenna for WLAN Application

Symmetric Wide Slot Ground with Triangle Tunable Patch Anten...

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2021 International Conference on Advances in technology, Management and Education, ICATME 2021

作者： Soni, Rachna Gupta, Sudesh Yadav, Pranay Technocrats Institute Of Technology Science Dept. of Electronics Communication Engineering Bhopal India Dept. of Research Development Bhopal India

ISBN: (纸本)9781728185866

In era of digital communication wireless technology gaining advancement day by day. In this research presented a wide slot ground with triangle tunable patch antenna. For the modeling of the presented antenna use CST microwave studio. The band-width of anticipated design is good that is 182.18% (6.3GHz). The simulation outcome of triangle tunable patch with wide slot antenna with the assessment of different antenna parameters. The projected design triangle tunable patch demonstrate better result for bandwidth (B.W.), reflection coefficient, number of bands and other parameters as compare to robust previous wide slot shapes antenna. © 2021 IEEE.

关键词： Wireless local area networks (WLAN)

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Subsurface modelling of Kei Kecil Island with 3D gravity inversion 7

Subsurface modelling of Kei Kecil Island with 3D gravity inv...

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7th International Conference on Mathematics, science, and Education 2020, ICMSE 2020

作者： Supriyadi Wijanarko, E. Khumaedi Department of Physics Faculty of Mathematics and Natural Science Universitas Negeri Semarang Indonesia Research and Development Centre for Oil and Gas Technology LEMIGAS

Kei Kecil Island located at Kei Islands, Maluku Province, Indonesia and it is one of outer Banda Arc. Several compression and extension tectonic accoured in Kei Island that made complex regional structural geology there. Mapping of surface geology has been done by several geoscientists, but subsurface mapping is still challenging. This paper aims to image subsurface geological features in Kei Island and its surrounding. Gravity method carried out to obtain density configuration for interpretation of basin topography. Gravity data obtained from previous publication and the other collected through satellite-derived gravity. Result of analyses show Kei Kecil Island located at depocenter of the basin around the high of the surroundings. Trending of the basin is Northeast-Southwest to North-South. Interpretation reveals basin in the Kei Kecil Island situated in central part toward northern trending almost North-South direction. The higher density rock dominating southern area of the island caused by Weduar and Elat Formation from Kei Besar Island. The denser density dipping from Kei Besar Island to Kei Kecil Island with Northwest direction. The basins in Kei Kecil Island probably produce hydrocarbon. © Published under licence by IOP Publishing Ltd.

关键词： Structural geology

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Simple and rapid conversion of silicon carbide to nanodiamonds at ambient pressure

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Journal of Materials science & technology 2021年第35期94卷 230-238页

作者： Cheng Yang Bingqiang Wei Kejian He Ping Xu Xiangmin Xie Kai Tong Chen Zeng Yafeng Wang Xiaodong Wang Jinping Liu Mingyu Zhang Zhe'an Su Qizhong Huang State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Advanced Research Center.Central South University Changsha 410083China Hunan Changyu Science and Technology Development Co. Ltd.Changsha 410600China

Nanodiamonds(NDs)were prepared under ambient pressure by sublimation decomposition of silicon carbide in an intermediate frequency furnace for only 8 *** synthesis proceeded in the temperature range of 2600-2800℃ without any catalyst or highly active gas components(such as H2,alkane,and halogen).The conversion began at 2600℃ and produced NDs with particle sizes in the range of 1-5 nm with a uniform particle shape and excellent *** linear reaction kinetics allowed for rapid transformation to any depth with reasonable control of the *** linear rate constant(K_(l))for the reaction at 2800℃ was 37.5 mm/h,which is 31.2 times that of the reaction at 2600℃.The Si C sublimation decomposition produced carbon atoms that filled the Si C lattice vacancies or were combined with the suspended carbon chain bonds to form sp3 carbon,while the diffusion of amorphous carbon atoms promoted nucleation and growth of ***-resolution transmission electron microscopy analysis indicated that the NDs were separated from the Si C matrix by break-off due to propagation of the reaction *** Si C sublimation decomposition method is considered simple,fast,environmentally friendly and promising for industrial-scale production.

关键词： n-diamond SiC Nanodiamond Sublimation decomposition

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A novel strategy of estimating the GNSS ray-tracing tropospheric delay based on the satellite clustering areas

A novel strategy of estimating the GNSS ray-tracing troposph...

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Signal, Information and Data Processing (ICSIDP), IEEE International Conference on

作者： Hongyang Ma Yuanhao Li Yunshan Yue Zhiliang Wang Jianyu Tian Ran Li School of Geomatics Science and Technology Nanjing Tech University Nanjing China BeiDou Institute of Application and Development Radar Technology Research Institute Beijing Institute of Technology Beijing China Radar Technology Research Institute of Chongqing Innovation Center Beijing Institute of Technology China South China Sea Survey Center Ministry of Natural Resources Guangzhou China BeiDou Institute of Application and Development China Aerospace Information Research Institute Chinese Academy of Sciences Beijing China

ISBN: (数字)9798331515669

ISBN: (纸本)9798331515676

The tropospheric delay is a natural error source that occurs when objects, including radio signals, pass through the lower atmosphere at altitudes below 70 km. It needs to be carefully adjusted in numerous scientific research endeavors, e.g., remote sensing satellite-based Earth observation, aircraft precise positioning, and active radar surveillance system. Global Navigation Satellite System (GNSS) has become a popular tropospheric delay generating technique thanks to its facilitating approach, high precision estimation, and low-cost receiving devices. However, the existing GNSS data processing methodology allows for the estimation of zenith tropospheric delay by considering the physical characteristics of the troposphere and employing a simplified functional model. Therefore, the accuracy of ray-tracing tropospheric delay would be compromised when converting the zenith delay to the slant direction using a mapping function. This manuscript proposes a novel GNSS data processing strategy which can directly estimate the ray-tracing tropospheric delay. The hemispherical observable space is divided into several regions based on different azimuth and elevation angles, and GNSS satellites that belong to the same region are considered to experience the identical tropospheric delay due to the tropospheric physical characteristics. In this case, the ray tracing tropospheric delay can be calculated, and the corresponding estimation precision can be guaranteed, as an individual delay may incorporate observables from multiple satellites. The estimation precision could be further improved once additional GNSS receivers are involved in the data processing. Furthermore, this manuscript analyzes the impact of multiple GNSS receivers on ray-tracing tropospheric delays, considering that the signal paths may not be strictly identical for the receivers. Among which, potential signal blockage impacts, horizontal distance impacts and altitude variation impacts between each receiver are r

关键词： Global navigation satellite system Accuracy Spaceborne radar Satellite broadcasting Estimation Terrestrial atmosphere Receivers Ray tracing Data processing Delays

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An Phase Compensation Method Based On Time Delay for Secondary Channels of Active Power Filter

An Phase Compensation Method Based On Time Delay for Seconda...

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Chunyu Yang Chen Huang Chengchao Hua Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design Centre Wuhan China

The adaptive active power filter based on LMS algorithm has limited compensation ability for the phase difference caused by the secondary channel, which makes its suppression function of harmonic current invalid, and may enhance the harmonics in serious cases. Based on time delay, this paper proposed a phase compensation method of secondary channel, which can effectively compensate the phase difference caused by secondary channel and realize the interference of any frequency point in the target frequency band.

关键词： Time-frequency analysis Delay effects Interference Active filters Harmonic analysis Computational electromagnetics Delays

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ADLM - stega: A Universal Adaptive Token Selection Algorithm for Improving Steganographic Text Quality via Information Entropy

arXiv

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arXiv 2024年

作者： Qin, Zezheng Sun, Congcong He, Taiyi He, Yuke Abdullah, Azizol Samian, Normalia Roslan, Nuur Alifah Faculty of Computer Science and Information Technology Universiti Putra Malaysia UPM Serdang Selangor43400 Malaysia Department of Communication Technology and Network Faculty of Computer Science and Information Technology Universiti Putra Malaysia UPM Serdang Selangor43400 Malaysia Research Institute of Social Development Southwestern University of Finance and Economics China Multimedia Department Faculty of Computer Science and Information Technology Universiti Putra Malaysia UPM Serdang Selangor43400 Malaysia

In the context of widespread global information sharing, information security and privacy protection have become focal points. Steganographic systems enhance information security by embedding confidential information into public carriers;however, existing generative text steganography methods face challenges in handling the long-tail distribution of candidate word pools, which impacts the imperceptibility of steganographic information. This paper proposes a quality control theory for steganographic text generation based on information entropy constraints, exploring the relationship between the imperceptibility of steganographic texts and information entropy. By controlling the information entropy of the candidate word pool within a specific range, we optimize the imperceptibility of the steganographic text. We establish upper and lower bounds for information entropy and introduce an adaptive truncation method to balance semantic coherence and lexical diversity. Experimental results demonstrate that reasonably controlling the candidate pool size and information entropy thresholds significantly enhances the quality and detection resistance of steganographic texts, showcasing broad application potential in the field of natural language processing. Copyright © 2024, The Authors. All rights reserved.

关键词： Semantics

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Fracture and regional stress-related upper crustal azimuthal anisotropy in the vicinity of the 2016 M5.1 Fairview, Oklahoma, earthquake 3

Fracture and regional stress-related upper crustal azimuthal...

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3rd International Meeting for Applied Geoscience and Energy, IMAGE 2023

作者： Jiang, Enyuan Jia, Yan Liang, Jiaqian Liu, Kelly H. Gao, Stephen S. China National Oil and Gas Exploration and Development Company Ltd. Beijing100034 China Key Laboratory of Submarine Geosciences Second Institute of Oceanography Ministry of Natural Resources Hangzhou310012 China Geology and Geophysics Program Missouri University of Science and Technology RollaMO65409 United States

To examine potential correlations between wastewater injection and spatial-temporal distribution of upper crustal anisotropy, we conduct shear wave splitting analysis using local S waves recorded by six stations in the vicinity of the 2016 M5.1 earthquake. The event is generally considered to have been induced by injection. A total of 405 pairs of high-quality measurements were obtained using local events that occurred in the S-wave window. For raypaths mainly traveling through the fault zone of the M5.1 earthquake, the observed fast orientations are mostly parallel to the faults or the duplex structures and thus may reflect fault induced anisotropy. In contrast, for raypaths not dominantly traveling through the fault zone, E-W fast orientations are pervasively observed which are consistent with the regional maximum compressive stress. Possible temporal variations in the normalized delay time may indicate the process from crack opening under pore pressure originating from the wastewater injection to crack healing. © 2023 Society of Exploration Geophysicists and the American Association of Petroleum Geologists.

关键词： Earthquakes

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Graph Neural Network Tells Us Who is the Communication Enhancer

Graph Neural Network Tells Us Who is the Communication Enhan...

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IEEE International Conference on Big Data

作者： Hiroaki Tanaka Yuuma Jitsunari Wataru Yamada Keiichi Ochiai Shoko Wakamiya Eiji Aramaki X-Tech Development Department NTT DOCOMO INC. Tokyo Japan Graduate School of Science and Technology Nara Institute of Science and Technology Nara Japan

ISBN: (纸本)9781665480468

Many managers and human resource departments transfer a person in an attempt to increase the performance of an organization or team. When we define performance as team efficiency, the performance is influenced by the density of team communications. However, whether or not the candidate transferee will actually increase the density of team communications is an unknown. In this paper, we propose a new approach that estimates whether or not a person who joins a team will improve the density of team communications based on an instant messaging system (IMS). In the proposed approach, we embed people in feature space using graph neural networks. In this embedding process, we do not use the content of text communications but utilize only communication graph architectural information that expresses who is talking to whom and how often. Additionally, the proposed approach does not require a questionnaire to indicate the density of team communication as in some previous studies. In the proposed approach, we develop a machine learning model classifying whether or not a transferee will improve the density of team communications. The model classifies transferees at an accuracy of 0.57 and precision of 0.58. Since this model does not use text contents from the IMS, it is valuable in actual business situations.

关键词： Privacy Machine learning Instant messaging Organizations Oral communication Big Data Graph neural networks

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