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UPB Scientific Bulletin, Series C: Electrical Engineering and Computer Science 2025年第1期87卷 229-240页

作者： Qian, Xuewu Department of Electronic Engineering Jinan Vocational College Jinan250103 China Jinan Key Laboratory of 5G + Advanced Control Technology Jinan Vocational College Jinan250103 China

The widespread use of ultrasonic ranging can be attributed to its low cost, high measurement accuracy and ease of use. However, the accuracy of ultrasonic ranging is significantly affected by environmental factors, necessitating comprehensive investigation. This paper presents an analysis of the principle of tracking ultrasonic ranging, a description of the circuit design and timing logic, and a proposal for a combined filtering algorithm combining median filtering with Kalman filtering. The results of the testing demonstrate that the combined filtering method has the potential to significantly enhance the accuracy and stability of the measurements. In the range of 3 metres, the measurement error can reach ±1 mm. In comparison with traditional methods, the level of precision achieved is 50% greater, which lends considerable weight to the potential applicability of this methodology. © 2025, Politechnica University of Bucharest. All rights reserved.

关键词： Kalman filtering Median filtering Tracking type Ultrasonic ranging

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DESIgN AND KINEMATICS ANALYSIS OF VERTICAL EXTERNAL MESHINg BIOMASS PELLET FUEL FORMINg MACHINE

International Journal of Mechatronics and Applied Mechanics

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International Journal of Mechatronics and Applied Mechanics 2023年第13期2023卷 30-37页

作者： Tingzhou, Ning Xuewu, Qian School of Mechanical Manufacturing Jinan Vocational College Jinan250103 China Jinan Key Laboratory of 5G + Advanced Control Technology Jinan250103 China

In order to reduce the energy consumption of die roll forming machine and improve the productivity of piston punch forming machine, this paper proposes a new type of biomass solidification forming method. Firstly, a comparative analysis of the three types of biomass solidification forming equipment was carried out in terms of their working principles and performance, which revealed the characteristics of each type of biomass solidification forming equipment. Secondly, a new type of biomass pellet fuel forming machine was designed by combining the characteristics of piston punch forming machine and die roll forming machine. During operation, the plungers on the roller engage with the holes in the ring die, and the biomass material is continuously compressed and densely formed in the ring die holes, which reduce the energy consumption and improved the productivity. Finally, a kinematics analysis of the key components of the forming machine was carried out based on SolidWorks, and the feasibility of the design scheme was verified. The design of this forming machine can be a reference for improving the productivity and reducing the energy consumption of biomass solidification forming equipment. © 2023, Cefin Publishing House. All rights reserved.

关键词： Biomass

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Data processing method for aerial testing of rotating accelerometer gravity gradiometer

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中国惯性技术学报 2024年第8期32卷 743-752页

作者： QIAN Xuewu TANg Hailiang Department of Electronic Engineering Jinan Vocational CollegeJinan 250103China Jinan Key Laboratory of 5G+Advanced Control Technology Jinan 250103China School of Information Science and Engineering Qilu Normal UniversityJinan 250200China

A novel method for noise removal from the rotating accelerometer gravity gradiometer(MAgg)is *** introduces a head-to-tail data expansion technique based on the zero-phase filtering principle.A scheme for determining band-pass filter parameters based on signal-to-noise ratio gain,smoothness index,and cross-correlation coefficient is designed using the Chebyshev optimal consistent approximation ***,a wavelet denoising evaluation function is constructed,with the dmey wavelet basis function identified as most effective for processing gravity gradient *** results of hard-in-the-loop simulation and prototype experiments show that the proposed processing method has shown a 14%improvement in the measurement variance of gravity gradient signals,and the measurement accuracy has reached within 4E,compared to other commonly used methods,which verifies that the proposed method effectively removes noise from the gradient signals,improved gravity gradiometry accuracy,and has certain technical insights for high-precision airborne gravity gradiometry.

关键词： airborne gravity gradiometer data processing band-passing filter evaluation function

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Predicting Cell Line-Specific Synergistic Drug Combinations Through Siamese Network with Attention Mechanism 1

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2nd International Conference on Cognitive Computation and Systems, ICCCS 2023

作者： Bao, Xin Chen, XiangYong Qiu, JianLong Wang, Donglin Qian, Xuewu Sun, JianQiang School of Information Science and Engineering Linyi University Linyi276005 China School of Automation and Electrical Engineering Linyi University Linyi276005 China Jinan Key Laboratory of 5G+ Advanced Control Technology Jinan250103 China

ISBN: (数字)9789819708857

ISBN: (纸本)9789819708840

Drug combination therapy holds great promise for curing cancer patients, as it can significantly enhance treatment effectiveness and reduce drug toxicity. However, efficiently identifying synergistic drug combinations from a vast pool of potential drug combinations remains challenging, mainly due to the expensive and time-consuming nature of traditional experimental methods. In this work, we introduce a novel deep learning method called SNAADC for discovering synergistic drug combinations. In SNAADC, we employ Siamese Network and attention mechanism to extract more effective drug features for better performance. The experimental results demonstrate that SNAADC outperforms traditional and popular methods. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Network architecture

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ANALYSIS OF THE INFLUENCE OF MEASUREMENT FOR THE control CIRCUIT OF gRAVITY gRADIOMETER ON gRAVITY gRADIENT MEASUREMENT

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical Engineering and Computer Science 2024年第2期86卷 201-210页

作者： Qian, Xuewu Ning, Tingzhou School of Electronic Engineering Jinan Vocational College Jinan250103 China School of Mechanical Manufacturing Jinan Vocational College Jinan250103 China Jinan Key Laboratory of 5G + Advanced Control Technology Jinan Vocational College Jinan250103 China

In order to study the influence of the measurement and control circuit system on gravity gradient components, the analysis started from the amplification gain and initial phase angle of the control circuit. The impact of gain discrepancies and initial phase angle errors in the control circuit on gravity gradients were analyzed, leading to certain conclusions. The adder and voltage amplifier gain errors in the control circuit have a significant effect on the gradient measurement. The amplification gain of the control circuit system has a greater impact on larger gradient components and a smaller impact on smaller gradient components. The initial phase angle error and the amplification gain of the measurement and control system have opposite effects on the gradient components. Finally, a method for achieving precise positioning of the initial phase angle using trigger pulse was proposed. Through experiments with the control system, when the sampling rate is 10Hz, the maximum gradient error was 0.1Eu, meeting the experimental requirements. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： control systems

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OPTIMIZATION DESIgN OF THE CROSSBEAM FOR THE VIADUCT TYPE FIVE-AXIS gANTRY BORINg AND MILLINg MACHININg CENTRE

International Journal of Mechatronics and Applied Mechanics

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International Journal of Mechatronics and Applied Mechanics 2024年第16期2024卷 93-98页

作者： Tingzhou, Ning Zichen, Yin Xuewu, Qian School of Mechanical Manufacturing Jinan Vocational College Jinan250103 China Office of Scientific Research Jinan Vocational College Jinan250103 China School of Electronic Engineering Jinan Vocational College Jinan250103 China Jinan Key Laboratory of 5G + Advanced Control Technology Jinan Vocational College Jinan250103 China

In order to enhance the national research and development capability of large five-axis linkage machine tools, promote the improvement of performance and accuracy, promote industrialization, replace imports and meet the machining process requirements for large five-axis linkage machine tools in aviation and aerospace, this paper proposed a viaduct type five-axis gantry boring and milling machining centre. The centre's workbench is a floor standing platform, with the bed placed on both sides of the workbench. The two crossbeams are arranged back-to-back, and move longitudinally along the left and right guide rails (X-axis). The slide plate moves horizontally along the crossbeam guide rails (Y-axis), and the ram moves up and down along the slide plate (Z-axis). The double swing angle CNC universal milling head can achieve rotation around the Z-axis (C-axis) and X-axis (A-axis) to achieve five-axis simultaneous machining under the control of the CNC system. At the same time, the crossbeam of the machining centre has been structurally optimized to effectively reduce the weight of the moving parts, improve the dynamic performance of the machine tool and achieve a μ-level output of repeatable positioning accuracy for large strokes of the machine tool. © 2024, Cefin Publishing House. All rights reserved.

关键词： Finite element method

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Topological surface states in quasi-two-dimensional magnetic kagome metal EuTi_(3)Bi_(4)

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Science Bulletin 2024年第20期69卷 3192-3196页

作者： Zhicheng Jiang Tongrui Li Jian Yuan Zhengtai Liu Zhipeng Cao Soohyun Cho Mingfang Shu Yichen Yang Zhikai Li Jiayu Liu Jianyang Ding Zhonghao Liu Jishan Liu Jie Ma Zhe Sun Xiangang Wan Yanfeng guo Dawei Shen Donglai Feng National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China e5 National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China f 6Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China g7 Institute of High-Pressure Physics and School of Physical Science and Technology Ningbo UniversityNingbo 315211China h 8ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China i9New Cornerstone Science Laboratory University of Science and Technology of ChinaHefei 230026China j 10Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China k 11National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China

In solids,the reservation of symmetries defines the types of topological invariants that classify various topological quantum materials[1–3].Among them,the time-reversal symmetry(TRS)is the most fundamental,which plays key role in topological helical edge or surface ***,breaking TRS in topological materials typically gives rise to unexpected exotic states,such as magnetic Weyl semimetals,quantum anomalous Hall insulators,and axion insulators.

关键词： topological quantum magnetic

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Bauschinger effect in nano-grinding of 3C-SiC: A molecular dynamics study

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Wear 2025年 571卷

作者： Zhao, Xiangyang Tang, Yunqing Chen, keyang Cai, Yukui Liang, Xiaoliang Liu, Zhanqiang Li, Dongyang School of Mechanical Engineering Shandong University Jinan250061 China State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong University Jinan250061 China Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education Jinan250061 China Key National Demonstration Center for Experimental Mechanical Engineering Education Jinan250061 China Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing Technology Guilin University of Electronic Technology Guilin541004 China Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G 2H5 Canada

The Bauschinger effect typically occurs in ductile materials and influences their tribological behaviors. However, this phenomenon is rarely reported in brittle materials. The nano-scale plastic deformation observed in brittle materials implies that the Bauschinger effect may also occur during their nano-tribological processes. In this study, molecular dynamics simulations were employed to evaluate the Bauschinger effect in cubic silicon carbide (3C-SiC) and its effect on nano-grinding of 3C-SiC. The results show that defects generated in 3C-SiC during shear deformation recover upon reversal of the shear direction, and defects near the surface of 3C-SiC workpiece generated during nano-grinding also recover upon reversal of the grinding direction, which validates the hypothesis that the Bauschinger effect may occur in 3C-SiC and could benefit its machinability. The Bauschinger effect during bi-directional grinding could help significantly reduce the damage and roughness to the surface of 3C-SiC and also help lower the machining resistance. Such benefits from the Bauschinger effect are found to be more pronounced at relatively lower temperatures, which makes the machinability of 3C-SiC during the bi-directional grinding at relatively lower temperatures comparable to that during the unidirectional grinding at higher temperatures. Therefore, taking advantage of the Bauschinger effect could help lower the operation temperature for high-quality and high-efficiency grinding of 3C-SiC with reduced defects, roughness, and resistance. This study provides an insight into the nano-tribological behaviors of brittle materials and demonstrates an effective approach for their ultra-precision machining. © 2025 Elsevier B.V.

关键词： Machinability

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Mechanical properties and wear behaviors of lightweight Al3Ti-based medium-entropy alloys at elevated temperatures

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Wear 2025年 570卷

作者： Diao, guijiang He, Anqiang Zhang, Dong Tang, Yunqing Zhou, Yefei Xu, Zhen Chen, keyang Kumar, Aakash Mousavi, Seyed Elias Wu, Mingyu Chen, Wengang Chen, D.L. Li, D.Y. Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G 2H5 Canada State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong University Jinan250061 China State Key Laboratory of Metastable Materials Science & Technology Yanshan University Qinhuangdao066004 China Shi-changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China School of Machinery and Transportation Southwest Forestry University Kunming650224 China Department of Mechanical Industrial and Mechatronics Engineering Toronto Metropolitan University TorontoONM5B 2K3 Canada

Al3Ti-based medium-entropy alloys (MEAs) with improved high-temperature mechanical properties and wear resistance were fabricated using arc melting method via alloying Al3Ti with various amounts of Cr, Mn, Fe and Cu elements. The alloying elements, Cr, Mn, Fe, and Cu, transformed the brittle D022 structure into a ductile L12 structure, along with the formation of hard B2 and D8a second phases. The resultant combination of improved ductility and strength enhances the mechanical performance of the material. A representative alloy, Al60Ti20Cr5Mn5Fe5Cu5, achieved high yield strength and high hardness of 442 MPa and 270HV2 at even 500 °C. Wear tests showed that the Al3Ti-based MEAs distinctly outperformed conventional Al-matrix composite reinforced with 30 wt% of SiC particles at both room temperature and 300 °C. The ordered L12, B2, and D8a phases not only led to good room-temperature strength and hardness, but also contributed to high thermal stability, contrasting with solid solution alloys, resulting in superior high-temperature performance. The results highlight Al3Ti-based MEAs as competitive candidates for medium-temperature applications, bridging the gap between aluminum and titanium alloys in engineering applications. © 2025 The Author(s)

关键词： Titanium alloys

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AFDM-SCMA: A Promising Waveform for Massive Connectivity over High Mobility Channels

arXiv

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arXiv 2023年

作者： Luo, Qu Xiao, Pei Liu, Zilong Wan, Ziwei Nikolaos, Thomos gao, Zhen He, Ziming The 5G & 6G Innovation Centre University of Surrey United Kingdom The School of Computer Science and Electronics Engineering University of Essex United Kingdom The School of Information and Electronics Beijing Institute of Technology Beijing100081 China The 5G & 6G Innovation Centre University of Surrey GuildfordGU2 7XH United Kingdom BIT Zhuhai519088 China The MIIT Key Laboratory of Complex-Field Intelligent Sensing BIT Beijing100081 China Jinan250307 China Jiaxing314019 China The Samsung Cambridge Solution Centre System LSI Samsung Electronics CambridgeCB4 0DS United Kingdom

This paper studies the affine frequency division multiplexing (AFDM)-empowered sparse code multiple access (SCMA) system, referred to as AFDM-SCMA, for supporting massive connectivity in high-mobility environments. First, by placing the sparse codewords on the AFDM chirp subcarriers, the input-output (I/O) relation of AFDM-SCMA systems is presented. Next, we delve into the generalized receiver design, chirp rate selection, and error rate performance of the proposed AFDM-SCMA. The proposed AFDM-SCMA is shown to provide a general framework and subsume the existing OFDM-SCMA as a special case. Third, for efficient transceiver design, we further propose a class of sparse codebooks for simplifying the I/O relation, referred to as I/O relation-inspired codebook design in this paper. Building upon these codebooks, we propose a novel iterative detection and decoding scheme with linear minimum mean square error (LMMSE) estimator for both downlink and uplink channels based on orthogonal approximate message passing principles. Our numerical results demonstrate the superiority of the proposed AFDM-SCMA systems over OFDM-SCMA systems in terms of the error rate performance. We show that the proposed receiver can significantly enhance the error rate performance while reducing the detection complexity. © 2023, CC BY.

关键词： Mean square error

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