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65th Human Factors and Ergonomics Society Annual Meeting, HFES 2021

作者： Wang, Mengcheng Zhao, Chuan Barr, Alan Yu, Suihuai Kapellusch, Jay Adamson, Carisa Harris School of Public Health University of California Berkeley BerkeleyCA United States Key Laboratory of Industrial Design and Ergonomics Ministry of Industry and Information Technology Northwestern Polytechnical University Shaanxi Xi'an China Department of Medicine University of California San Francisco San FranciscoCA United States Department of Occupational Science & Technology University of Wisconsin – Milwaukee United States School of Electromechanics Engineering Qingdao University Shandong Qingdao China

ISBN: (纸本)9781713844129

Recent studies have successfully reported the accuracy of using artificial neural networks to predict grip force in controlled settings. However, only relying on accuracy to evaluate the machine learning models may lead to overoptimistic results, especially on imbalanced datasets. The Matthews correlation coefficient (MCC) showed an advantage in capturing all the data characteristics in the confusion matrix. Therefore, a binary classification approach and the MCC value were introduced to assess the performance of previously proposed machine learning models. Our results show that the overall correlations ranging between 0.48 and 0.59 indicate a strong relationship between predictions and actual scenarios. The binary classification approach and the MCC values could be used for future performance comparison with other machine learning models. © 2021 by Human Factors and Ergonomics Society. All rights reserved.

关键词： Neural networks

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Observation of Spin-Momentum-Layer Locking in a Centrosymmetric Crystal

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Physical Review Letters 2021年第12期127卷 126402-126402页

作者： Ke Zhang Shixuan Zhao Zhanyang Hao Shiv Kumar Eike. F. Schwier Yingjie Zhang Hongyi Sun Yuan Wang Yujie Hao Xiaoming Ma Cai Liu Le Wang Xiaoxiao Wang Koji Miyamoto Taichi Okuda Chang Liu Jiawei Mei Kenya Shimada Chaoyu Chen Qihang Liu Department of Physical Science Graduate School of Science Hiroshima University Hiroshima 739-0046 Japan Shenzhen Institute for Quantum Science and Technology and Department of Physics Southern University of Science and Technology Shenzhen 518055 China Hiroshima Synchrotron Radiation Center Hiroshima University Hiroshima 739-0046 Japan Experimentelle Physik VII Universität Würzburg Am Hubland D-97074 Würzburg Germany Würzburg-Dresden Cluster of Excellence ct.qmat Germany Guangdong Provincial Key Laboratory for Computational Science and Material Design Southern University of Science and Technology Shenzhen 518055 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

The spin polarization in nonmagnetic materials is conventionally attributed to the outcome of spin-orbit coupling when the global inversion symmetry is broken. The recently discovered hidden spin polarization indicates that a specific atomic site asymmetry could also induce measurable spin polarization, leading to a paradigm shift in research on centrosymmetric crystals for potential spintronic applications. Here, combining spin- and angle-resolved photoemission spectroscopy and theoretical calculations, we report distinct spin-momentum-layer locking phenomena in a centrosymmetric, layered material, BiOI. The measured spin is highly polarized along the Brillouin zone boundary, while the same effect almost vanishes around the zone center due to its nonsymmorphic crystal structure. Our work demonstrates the existence of momentum-dependent hidden spin polarization and uncovers the microscopic mechanism of spin, momentum, and layer locking to each other, thus shedding light on the design metrics for future spintronic materials.

关键词： Dresselhaus coupling Rashba coupling Angle-resolved photoemission spectroscopy Density functional theory

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Effect of Temperature on High Strain Rate Tensile Mechanical Properties of Crconi Medium Entropy Alloy

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SSRN 2024年

作者： Wang, Lei Zhao, Xiaohong Zhao, Kaifeng Chen, Zuoming Xi, Yuntao Zhang, Keren Li, Jinguang Xu, Shanna Liu, Haitao Wen, Lei Xiao, Xinke Zhang, Wei Liu, Ruifan Ji, Jiangtao School of Material Science and Engineering Xi'an Shiyou University Xi'An710065 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang110819 China State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China Nation Center for Materials Service Safety University of Science and Technology Beijing Beijing100083 China Henan International Joint Laboratory of Dynamics of Impact and Disaster of Engineering Structures Nanyang Institute of Technology Nanyang473004 China No. 2 Oil Production Plant of Changqing Oilfield Company Qingcheng745000 China Petroleum Systems Engineering Faculty of Engineering and Applied Science University of Regina ReginaSKS4S 0A2 Canada Northwest Institute for Nonferrous Metal Research Shaanxi Xi'An710016 China Shaanxi Coal Industry New Energy Technology Co. Ltd. Shaanxi Xi'An710199 China China Railway First Survey and Design Institute Group Co. Ltd. Shaanxi Xi'An710043 China

Medium entropy alloys (MEAs) have shown broad application prospects in extreme environmental applications, such as aircraft landing gears and actuators, due to their excellent low-temperature mechanical properties. However, as the temperature rises to room temperature or above, the comprehensive mechanical properties significantly decrease, which has become a bottleneck limiting its application. For this purpose, this work designs gradient twin structures for MEAs and investigates the mechanical response under the combined effects of microstructure design, temperature effects, and strain rate effects from multiple angles. On this basis, combined with the study of tensile mechanical behavior over a wide range of temperature range and different strain rates, the strengthening mechanism of MEAs in gradient twin structures under strain rate temperature coupling conditions is elucidated. The experimental results indicate that: The SPD process has a significant effect on improving the mechanical properties, especially the yield strength, of CrCoNi MEA. The gradient structure enhances the strain rate sensitivity of CrCoNi MEA at room temperature, while reducing its value at high temperatures. For uniform coarse-grained MEAs, an increase in temperature significantly reduces the strain hardening ability, while for gradient structured MEAs, an increase in temperature results in a greater difference in strain hardening ability at different strain rates. © 2024, The Authors. All rights reserved.

关键词： Chromium alloys

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Anti-icing strategy of superhydrophobic electric thermal composite zoning

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Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica 2025年第9期46卷

作者： Liu, Xinle Jiang, Yanan Xin, Rongti Li, Qinghui Cai, Jinsheng AVIC Jiangxi Hongdu Aviation Industry Group Nanchang 330024 China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical University Xi’an 710072 China

As a new type of anti-icing technology，superhydrophobic electric thermal composite surface anti-icing has good anti-icing effect and low energy consumption. Based on the wetting characteristics of superhydrophobic surfaces and the heating characteristics of electric heating films， a composite anti-icing method of superhydrophobic-hydrophobic surface zoning and electric heating zoning is proposed according to the surface icing mechanism. Experimental research on the anti-icing of superhydrophobic electric thermal composite surfaces using an airfoil model was conducted in an icing wind tunnel. The results show that the new partitioned anti-icing method has the lowest anti-icing energy consumption，verifying its feasibility. The experimental results and energy consumption analysis indicate that freezing of the leading edge superhydrophobic surface will immediately cause ice accumulation and therefore require higher energy consumption under the impact of supercooled water droplets. The leading edge hydrophobic surface can maintain its wet anti-icing effect at lower energy consumption. Compared with conventional superhydrophobic electric heating anti-icing methods，the combination of superhydrophobic-hydrophobic surface zoning and electric heating zoning can reduce energy consumption by up to 64. 2%，and the influence of temperature and wind speed on this method is relatively small. © 2025 Chinese Society of Astronautics. All rights reserved.

关键词： anti-icing electric heating ice wind tunnel partition method superhydrophobic

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Identifying Best Companion between Fo Membrane and Draw Solute for High-Efficient Fruit Juice Concentration

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SSRN 2023年

作者： Noor, Indira Inastiti Wang, Xiaomeng Liu, Li Wang, Qun Wang, Zhidong Brendon, Hlomayi Ren, Yangguang Wang, Jian Gao, Jun Ma, Zhun Liu, Hongbo College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao266590 China Qingdao Municipal Engineering Design and Research Institute Limited Qingdao266000 China Shandong Haihua Group Co. Ltd Weifang262737 China The Institute of Seawater Desalination and Multipurpose Utilization MNR Tianjin300192 China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China Jiangsu Key Laboratory of Anaerobic Biotechnology School of Environment and Civil Engineering Jiangnan University Wuxi214122 China

The technology of forward osmosis (FO) has garnered increasing research interest for its excellent advantages in producing high-quality concentrated juice. However, the practical application of FO to concentrate juice is hindered by the lack of an appropriate FO membrane and matched draw solution. To address this challenge, several food additives containing high-valence ions were investigated to improve the feasibility of the FO process for juice concentration, using a nanofiltration-like FO membrane with an interlayer constructed by MOFs-based nanoparticles. The prepared NF-like FO membranes exhibited negative potential, superior hydrophilicity, and uneven crosslinking, which matched well with five selected food additives (C6H8O7, K2SO4, C6H5K3O7, MgSO4, and KH2PO4). A comprehensive comparison of selected five additives indicated that, with the exception of MgSO4, these additives at their saturated concentration exhibited marginally higher osmotic pressure than that of the fresh juice, indicating their limited suitability for further concentration of the fresh juice. However, during the pre-concentration phase of the fresh juice, the juice concentration is lower than that of the fresh juice due to the additional water incorporated during the juice production process. C6H5K3O7 was the optimal draw solution for pre-concentrating apple juice, while MgSO4 was better suited for further concentrating fresh juice. The concentrations of C6H5K3O7 and MgSO4 in the final juice were well below their limit value. Based on these findings, a proposal for a dual-stage and dual-cycle FO process has been suggested to achieve highly efficient concentration of fruit juice and seamless integration of juice production and fertigation of fruit trees, without the need to consider draw solution recovery. © 2023, The Authors. All rights reserved.

关键词： Fruit juices

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Characteristics of Surface Microstructures and Corrosion Behaviors of Zr-Based Bulk Metallic Glasses Processed by Nanosecond Pulsed Laser Ablation

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SSRN 2022年

作者： Yao, Yansheng Mei, Tao Chen, Rui Hu, Yu Ren, Zhongguo Dai, Nianwei Zhu, Suwan Zhang, Yachao Yong, Jiale Li, Jiawen School of Mechanical and Electrical Engineering Anhui Jianzhu University Anhui Hefei230601 China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Anhui Hefei230027 China

Nanosecond pulsed laser ablation (NPLA) is employed to surface-modify Zr47Cu46Al7 bulk metallic glasses (BMGs) and the effects of laser parameters on microstructures and corrosion behaviors are investigated. The microstructural characterization shows that the laser treated areas display a wrinkled microstructure with adsorbed ZrO2 particles. The hydrophilicity of Zr-based BMGs is evidently improved after NPLA treatment and the surfaces almost approach superhydrophilic state when the laser powers increase to 21 W. The accomplishment of the better hydrophilic surface of Zr-based BMGs is attributed to the rough microstructures induced by the pulsed laser ablation. The electrochemical results reveal that the NPLA treated samples exhibit a superior corrosion resistance in simulated body fluid (SBF) compared with as-cast ones. Pitting corrosion is selectively prone to occur in areas without NPLA treatment. The enhancement in corrosion resistance is attributed to the formation of protective ZrO2 film on BMG surfaces after ablation in air. © 2022, The Authors. All rights reserved.

关键词： Corrosion resistance

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Development And Optimization of Airborne Display Scene Based on SCADE

Development And Optimization of Airborne Display Scene Based...

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science and technology Innovation (IAECST), International Academic Exchange Conference on

作者： Qian Song Li Zhang Ze Tian School of Electronic Information Xi'an Polytechnic University Xi' an Shaanxi China School of Electronic Information Xi' an Polytechnic University Xi' an Shaanxi China Key Laboratory of Aviation Science and Technology on Integrated Circuit and Micro-System Design Xi' an Shaanxi China

With the rapid development of avionics display field, the traditional graphics software development method can no longer meet the needs of high security and efficiency. This paper studies a development method based on SCADE Display, a high security graphics application development tool, analyses the principle and characteristics of SCADE Display, applies SCADE Display to design airborne display scene models, and tests, analyses and optimizes the process on a home-made test platform. Finally, the experimental results show that the optimized solution can effectively improve the development efficiency and graphics frame rate, and also verify the adaptability and functionality of the home-made platform.

关键词： Graphics Adaptation models Technological innovation Analytical models Codes Atmospheric modeling Optimization methods

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Study on size effects in micro deep drawing of stainless steel foil 6

Study on size effects in micro deep drawing of stainless ste...

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6th International Conference on Precision Machinery and Manufacturing technology, ICPMMT 2021

作者： Yuan, S.N. Xie, H.B. Jia, F.H. Wu, H. Pan, D. Wang, T.X. Zhou, C. Jiang, Z.Y. School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong WollongongNSW2522 Australia Shanxi Taigang Stainless Steel Precision Strip Co. Ltd Taiyuan030032 China Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory Taiyuan University of Science and Technology Taiyuan030024 China

In this paper, the mechanism of processing parameters, such as lubrication conditions, grain size and foil thickness, on micro deep drawing (MDD) of stainless steel 304 (SUS304) foil has been investigated. The dry and glycerin-based nano-additive TiO2lubricant with different concentrations were selected to study the effects of lubrication on MDD process. Four stainless steel samples with different thicknesses of 20, 30, 40 and 50 μm were employed in this study. Each foil was annealed under 950, 980 and 1050 °C respectively to obtain different grain sizes of the samples. The formed cups qualities in terms of surface roughness, wrinkling and earing defects were analysed, and the punch force-stroke curves and the stress-strain curves were studied in MDD. The experimental results show that 4.0 wt.% glycerin-based nano-additive TiO2lubricant has the best lubrication effects due to its lowest drawing force and the better surface quality obtained, and the SUS304 foil with thinner thickness required smaller punch force, while the surface is more uneven in comparison with the thicker SUS304 foil. Moreover, the SUS304 foils annealed at lower temperature had smaller grains, and subsequently had smoother surface textures than those of SUS304 foils with larger grains annealed at higher temperature. The findings of size effects from lubrication, grain size and foil thickness obtained in this study will enhance the mechanism understanding of SUS304 foil deformation in MDD. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Surface roughness

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ACtriplet: An improved deep learning model for activity cliffs prediction by integrating triplet loss and pre-training

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Journal of Pharmaceutical Analysis 2025年

作者： Xinxin Yu Yimeng Wang Long Chen Weihua Li Yun Tang Guixia Liu Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism Shanghai Key Laboratory of New Drug Design School of Pharmacy East China University of Science and Technology Shanghai 200237 China

Activity cliffs (ACs) are generally defined as pairs of similar compounds that only differ by a minor structural modification but exhibit a large difference in their binding affinity for a given target. ACs offer crucial insights that aid medicinal chemists in optimizing molecular structures. Nonetheless, they also form a major source of prediction error in structure-activity relationship (SAR) models. To date, several studies have demonstrated that deep neural networks based on molecular images or graphs might need to be improved further in predicting the potency of ACs. In this paper, we integrated the triplet loss in face recognition with pre-training strategy to develop a prediction model ACtriplet, tailored for ACs. Through extensive comparison with multiple baseline models on 30 benchmark datasets, the results showed that ACtriplet was significantly better than those deep learning (DL) models without pre-training. In addition, we explored the effect of pre-training on data representation. Finally, the case study demonstrated that our model's interpretability module could explain the prediction results reasonably. In the dilemma that the amount of data could not be increased rapidly, this innovative framework would better make use of the existing data, which would propel the potential of DL in the early stage of drug discovery and optimization.

关键词： Activity cliff Triplet loss Deep learning Pre-training

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Three-Dimensional Dirac Phonons with Inversion Symmetry

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Physical Review Letters 2021年第18期126卷 185301-185301页

作者： Z. J. Chen R. Wang B. W. Xia B. B. Zheng Y. J. Jin Yu-Jun Zhao H. Xu Department of Physics South China University of Technology Guangzhou 510640 People’s Republic of China Department of Physics and Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 People’s Republic of China Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Shenzhen 518055 People’s Republic of China Institute for Structure and Function and Department of Physics and Center for Quantum Materials and Devices Chongqing University Chongqing 400044 People’s Republic of China

Dirac semimetals associated with bulk Dirac fermions are well known in topological electronic systems. In sharp contrast, three-dimensional (3D) Dirac phonons in crystalline solids are still unavailable. Here we perform symmetry arguments and first-principles calculations to systematically investigate 3D Dirac phonons in all space groups with inversion symmetry. The results show that there are two categories of 3D Dirac phonons depending on their protection mechanisms and positions in momentum space. The first category originates from the four-dimensional irreducible representations at the high symmetry points. The second category arises from the phonon branch inversion, and the symmetry guarantees Dirac points to be located along the high symmetry lines. Furthermore, we reveal that nonsymmorphic symmetries and the combination of inversion and time-reversal symmetries play essential roles in the emergence of 3D Dirac phonons. Our work not only offers a comprehensive understanding of 3D Dirac phonons but also provides significant guidance for exploring Dirac bosons in both phononic and photonic systems.

关键词： Acoustic phonons Phonons Symmetry protected topological states Topological phases of matter Dirac semimetal Topological materials First-principles calculations k dot p method

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