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Culture-oriented Science & technology (ICCST), International Conference on

作者： Jiying Guo Jingyu Liu Zijin Li Jiaxing Zhu Wei Jiang State Key Laboratory of Media Convergence of Communication Key Laboratory of Acoustic Visual Technology and Intelligent Control System (Communication University of China) Ministry of Culture and Tourism Beijing Key Laboratory of Modern Entertainment Technology (Communication University of China) School of Information and Communication Engineering Communication University of China China Conservatory of Music Beijing China

ISBN: (数字)9781728181387

ISBN: (纸本)9781728181394

This paper mainly studies the relationship between timbre perception features and emotion in musical sounds. Firstly, a five - dimensional emotional space was determined by multidimensional scaling analysis. Then emotional labeling subjective evaluation experiments were carried out for 72 scale materials and 48 melody materials of timbre to obtain emotional data of timbre materials. The correlation between timbre perception features and emotion is studied according to the playing content, temporal characteristics, and musical instrument types. Finally, a set of mathematical models of the relationship between timbre perception features and emotion was established by the method of multiple linear regression. The experimental results show that the features of timbre perception are an important effect on musical emotion, and these models have good predictive ability for the five emotion dimensions.

关键词： Timbre Instruments Correlation Correlation coefficient Standards Aerospace electronics Semantics

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SAR Image Processing and Target Detection Based on 2D Singularity Power Spectrum in Time-frequency Domain

SAR Image Processing and Target Detection Based on 2D Singul...

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IEEE International Conference on Signal and Image Processing (ICSIP)

作者： Junye Li Gang Xiong Baigang Huang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (数字)9781728168968

ISBN: (纸本)9781728168975

A method for SAR image processing and target detection based on two-dimensional singularity power spectrum (2D-SPS) in time-frequency domain is proposed in this paper. Firstly, the two-dimensional pseudo Wigner-Ville distribution (2D-PWVD) is carried out on the SAR image. Then, the two-dimensional singularity power spectrum estimation is performed on the local delay components of 2D-PWVD to obtain the three-dimensional singularity power spectral SAR (SPS-SAR) functions. Furthermore, a novel SAR target detection method based on SPS-SAR is introduced. The proposed methodology is tested on SAR images, both with and without weak targets, from the OpenSAR dataset. Experiment results show that the proposed method performs better than traditional method based on fractal theory, and can achieve higher detection probability in the complex scene with low SNR. It can provide more details for SAR image analysis and offer a new idea for SAR target detection.

关键词： Time-frequency analysis Two dimensional displays Object detection Radar polarimetry Fractals Spectral analysis Signal to noise ratio

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A Dual-Band Tunable Electromagnetically Induced Transparency (EIT) Metamaterial Based on Vanadium Dioxide

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Photonics 2025年第5期12卷

作者： Zhu, Lei Wang, Shujie Wang, Yun Dong, Liang Li, Hailong Wang, Yiya Ding, Xumin School of Computer and Control Engineering Qiqihar University Qiqihar161006 China Heilongjiang Key Laboratory of Big Data Network Security Detection and Analysis Qiqihar University Qiqihar161006 China Communication and Electronics Engineering Institute Qiqihar University Qiqihar161006 China Advanced Microscopy and Instrumentation Research Center Harbin Institute of Technology Harbin150080 China

A dual-band tunable terahertz electromagnetically induced transparency (EIT) metamaterial is introduced. The EIT metamaterial consists of two rectangular split rings, two metal strips, and a patterned vanadium dioxide (VO2) located at the back. The rectangular split rings serve as the bright resonator to generate two resonance valleys at distinct frequencies. The metal strips act as the dark resonator and are indirectly activated via the coupling influence of the bright resonator. The EIT metamaterial’s response mechanism is analyzed via the field effect and the two-particle model, with theoretical fitting results showing strong agreement with the simulation results. Moreover, VO2’s conductivity is altered to dynamically control the EIT effect in both frequency bands. Two transparency windows, with modulation depths of 70% and 75%, are observed as the conductivity of VO2 decreases. Simultaneously, the simulation results reveal a favorable slow light effect, with group delays reaching 51 ps and 74 ps at the transparency windows. The proposed metamaterial holds considerable promise for future modulator, filter, and slow light device applications. © 2025 by the authors.

关键词： Luminescent devices

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Analysis of dynamic characteristics of five-axis CNC machine tool

Analysis of dynamic characteristics of five-axis CNC machine...

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7th International Symposium on Test Automation and Instrumentation, ISTAI 2018

作者： Wang, Sicheng Wang, Hongjun Han, Qiushi Gao, Yangjie Ge, Lun School of Mechanical and Electrical Engineering Beijing Information Science and Technology University Beijing China Key Lab of Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing China Beijing Key Laboratory of Mechanical-Electronic System Measurement and Control Beijing Information Science and Technology University Beijing China

CNC machine tools play important role in industries. The dynamic characteristics of the machine tools are the main factor which affected the status of a machine tools. A three-dimensional model of a five-axis CNC machine tool was built by using PRO/E. First, the model was imported into ANSYS software in order to analyse the dynamic characteristics of the machine tool;the first six natural frequencies and vibration modes of the machine tool were obtained through modal analysis and harmonic response analysis. The accuracy of the finite element analysis model was verified through the experimental results. Finally, the optimisation suggestions of the machine tool structure were proposed. © 2019 Institution of engineering and technology. All rights reserved.

关键词： Machine tools

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Maintenance robot motion control based on Kinect gesture recognition

Maintenance robot motion control based on Kinect gesture rec...

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7th International Symposium on Test Automation and Instrumentation, ISTAI 2018

作者： Ge, Lun Wang, Hongjun Xing, Jishou School of Mechanical and Electrical Engineering Beijing Information Science and Technology University Beijing China Key Laboratory of Modern Measurement and Control Technology Beijing Information Science and Technology University Beijing China Beijing Key Laboratory of Mechanical-Electronic System Measurement and Control Beijing Information Science and Technology University Beijing China

Maintenance robot is used widely in industries due to its convenience. The maintenance robot system is introduced. The hardware frame is designed in detail. Based on gesture recognition, the effect of controlling the robot movement is achieved. Gesture recognition information is achieved through the acquisition of human skeleton information by a Kinect sensor. The construction of the gesture library is done. The maintenance robot control system is set up to control the omnidirectional mobile robot driven by the Mecanum wheel. Finally, the maintenance robot is developed and the design functions are carried out. © 2019 Institution of engineering and technology. All rights reserved.

关键词： Gesture recognition

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Design of driving wheel speed test device based on magnetoelectric sensor

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Journal of measurement Science and Instrumentation 2020年第2期11卷 186-192页

作者： HOU Zhi-wei CHEN Chang-xin MA Tie-hua WANG Yu JIAO Bin Science and Technology on Electronic Test&Measurement Laboratory North University of ChinaTaiyuan 030051China School of Electrical and Control Engineering North University of ChinaTaiyuan 030051China

In order to study the transmission efficiency of engine and optimize the structure of driving wheel,the rotational speed storage test device of driving wheel in tracked vehicle based on magnetoelectric sensor was *** device consisted of a mounting bracket,a sensor and a *** mounting bracket was installed in vehicle body after fixing the tester and sensor to mounting bracket beside the driving *** the storage test instrument,the wireless trigger technology was applied to synchronously record and stored the rotational speed data of the driving wheel in tracked *** the experiment was finished,the data was read out through the upper *** valid data and satisfactory results were obtained through both simulated and actual vehicle tests.

关键词： tracked vehicle storage test driving wheel test magnetoelectric sensor

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Characteristic analysis of double excitation sensor based on F-30 multi-dimensional digital magnetic measurement system

Characteristic analysis of double excitation sensor based on...

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7th International Symposium on Test Automation and Instrumentation, ISTAI 2018

作者： Zhang, Yanhai Xu, Xiaoli Zuo, Yunbo Zhang, Xiangqi School of Mechanical and Electrical Engineering Beijing Information Science and Technology University Beijing100192 China Beijing Information Technology University Modern Measurement and Control Technology Ministry of Education Key Laboratory Beijing100192 China Beijing Information Technology University Electromechanical System Measurement and Control Beijing Key Laboratory Beijing100192 China

According to the analysis characteristic of the on-line sensor of the mechanical device, the on-line magnetic field of the double excitation sensor is analysed by using the most advanced F-30 multi-dimensional digital magnetic measurement system. Using F-30 mode scanning analysis of the dual incentive sensor of two-dimensional (2D) and 3D characteristics, a system of a 3D mesh of the sensor is obtained, the 3D graph, the 3D graphic model, at last, through export data for magnetic field distribution of more detailed information. The accuracy of the F-30 magnetic field analysis system is very high, and the field distribution information of the sensor is more practical. This analysis is of a great reference value for the experimental analysis of the sensor. © 2019 Institution of engineering and technology. All rights reserved.

关键词： Magnetic fields

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A Double-ended Contactless Current Traveling Waves Scheme for Fault Location in Overhead Transmission Lines

A Double-ended Contactless Current Traveling Waves Scheme fo...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Patrick Nyaaba Ayambire Qi Huang Olusola Bamisile Paul Oswald Kwasi Anane Albert K. Awopone System Wid-Area Measurement and Control School of Mechanical and Electrical Engineering Sichuan Provincial Key Lab of Power Chengdu China College of Technology University of Education Winneba Kumasi Ghana

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

This study presents a contactless current traveling wave fault location scheme for a two-terminal overhead transmission line based on a tunnel Magnetoresistive sensor. The proposed method is implemented by installing a tunnel Magnetoresistive sensor array at both ends of the line for current traveling wave measurement. The measured data is transmitted to a remote monitoring unit (RMU) for analysis. The performance of the proposed method is evaluated for different fault situations using an experimental set-up. The proposed exhibited high efficiency for current traveling wave fault location. The results were analyzed for fault location using the differentiator smoother to reduce the time of arrival errors. The proposed scheme is compared with a general traveling wave-based scheme for transmission line fault distance location. In all test cases, the proposed scheme offered very efficient results for all categories of faults with an average relative error of 0.024%.

关键词： Wavelet transforms Power transmission lines Current measurement Fault location Transmission line measurements Magnetoresistance Sensor arrays

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Author Correction: Inferring time-varying generation time, serial interval, and incubation period distributions for COVID-19 ( doi 10.1038/s41467-022-35496-8, 13 dec 2022 )

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NATURE communicationS 2023年第1期14卷 1页

作者： Chen, Dongxuan Lau, Yiu-Chung Xu, Xiao-Ke Wang, Lin Du, Zhanwei Tsang, Tim K. Wu, Peng Lau, Eric H. Y. Wallinga, Jacco Cowling, Benjamin J. Ali, Sheikh Taslim WHO Collaborating Centre for Infectious Disease Epidemiology and Control School of Public Health Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong Special Administrative Region China Laboratory of Data Discovery for Health Limited Hong Kong Science and Technology Park New Territories Hong Kong Special Administrative Region China College of Information and Communication Engineering Dalian Minzu University Dalian 116600 China Department of Genetics University of Cambridge Cambridge CB2 3EH UK Center for Infectious Disease Control National Institute for Public Health and the Environment (RIVM) Bilthoven The Netherlands Department of Biomedical Data Sciences Leiden University Medical Center Leiden The Netherlands

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Study on uncertainty reasoning of running reliability testing face to CNC machine

Study on uncertainty reasoning of running reliability testin...

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7th International Symposium on Test Automation and Instrumentation, ISTAI 2018

作者： Wu, Guoxin Zuo, Yunbo Wang, Hongjun Xu, Xiaoli Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science &Technology University Beijing China School of Electromechanical Engineering Beijing Information Science &Technology University Beijing China

It is necessary to test the reliability of the operation of the machine itself for meeting the high-speed, ultra-precision, flexible, and other modern manufacturing and processing needs. In practical applications, the obtained reliability detection information presents a variety of uncertainties such as randomness, imprecision, incompleteness and so on, due to the complexity of the machining environment, the limitations of the sensor itself and the imperfections of the information acquisition technology. The uncertainty reasoning method is proposed to test reliability and accuracy precision. Based on the multi-sensor information characteristic, the rule of the credibility sets is established to achieve the operational reliability analysis. It can realise the uncertainty reasoning for the modal and reliability rules. Examples of analysis show that during the high-end CNC machine tools operational reliability analysis, it has a practical effect to study the uncertainty reasoning method of the modal and reliability propositional rule and the analysis basis can be provided for the precision degradation and fault diagnosis. © 2019 Institution of engineering and technology. All rights reserved.

关键词： Reliability analysis

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