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第六届国际仿生工程学术大会暨2019年自然启迪科技国际研讨会

作者： Honggen Zhou Xiaoqing Li Guizhong Tian Chenqing Liu Jie Cui School of Mechanical Engineering Jiangsu University of Science and Technology Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Engineering Jiangsu University of Science and Technology

Based on the migratory phenomenon of puffer and the unusual structure of its skin, the drag reduction characteristics and flow field structure of the bionic non-smooth surface are presented in this paper. With the use of numerical simulation, the flow characteristics of bionic non-smooth surfaces with different heights of drag reduction element are researched. The results show that the trend of total drag reduction efficiency changes from flat to a remarkable decline, while the viscous drag reduction efficiency changes from obvious increase to step-by-step steady growth. The total drag reduction rate of bionic non-smooth surface comes to 24.1% and the viscous drag reduction rate is 34.4%. It shows that the thickness of low-speed fluid increases with the rise of the element's height by changing the boundary layer structure of bionic non-smooth surface on the flow field. The ratio of maximum thickness to minimum thickness of low-speed fluid is 7.5 times. There are two kinds of vortices around drag reduction element generated by impact and separation, which can develop and merge to fill up the spacing of two elements. With the increasing of low-speed fluid and the reducing of near-wall fluid velocity gradient, the viscous drag of bionic non-smooth surface is weakened. The result of pressure shows that the pressure drag mainly comes from the front rows of drag reduction elements in the non-smooth region, the pressure difference of the first three rows accounts for more than 60%. The structures of nearwall velocity and pressure are changed by drag reduction element, and the influences of viscous drag and pressure drag are different. This work will serve as a theoretical basis for optimizing the structure and distribution parameters of drag reduction elements on bionic non-smooth surfaces.

关键词： Bionic engineering Bionic non-smooth surface Puffer spine Numerical simulation Flow field structure

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Design of an ergonomic App for entire rapid body assessment based on Mask RCNN

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Journal of Physics: Conference Series 2020年第1期1633卷

作者： Shuai Wu Ziwen Chen Xinqiao Zhao Maoyun Yao Zihao Wang Shaolong Kuang School of Mechanical and Electrical Engineering Suzhou University Suzhou China Jiangsu Provincial Key Laboratory of Advanced Robot Technology Suzhou University Jiangsu

The rapid entire body assessment (REBA) is a rapid and semi-quantitative ergonomic assessment method for those who engaged in manual handling and/or standing work for a long time. In order to provide a self-assessment tool for operators, an App software based on Mask RCNN is proposed in this paper. The software is developed by adopting the architecture of a mobile terminal App combined with an imaging processing server. The main functions of the App are video capturing of work process, the operation of the process of REBA, human-machine interaction, etc., while the server is work for processing the video imaging transmitted from the App, key-points extraction of worker's body from the images for work posture identification. One thousand working scene photos marked by VIA are used for training and testing based on the Microsoft COCO dataset to obtain a reliable target detection model. Experiment of container handling scene shows that the App evaluation software has achieved higher evaluation efficiency and accuracy. The validation of this method has been proved compared with manual evaluation based on REBA. And other work posture evaluation methods will be developed in the future to form an ergonomic evaluation software system.

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基于离子印迹的二价铜离子非标记检测平台预防听力损失（英文）

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Engineering 2024年第2期 276-282页

作者： Huan Wang Hui Zhang Xiaoli Zhang Hong Chen Ling Lu Renjie Chai The Eighth Affiliated Hospital Sun Yat-Sen University Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging Department of Biomedical Engineering Shenzhen University State Key Laboratory of Digital Medical Engineering Department of Otolaryngology Head and Neck Surgery Zhongda Hospital & Advanced Institute for Life and Health Southeast University Department of Otolaryngology Head and Neck Surgery Jiangsu Provincial Key Medical Discipline Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Co-Innovation Center of Neuroregeneration Nantong University Department of Otolaryngology Head and Neck Surgery Sichuan Provincial People's Hospital University of Electronic Science and Technology of China Institute for Stem Cell and Regeneration Chinese Academy of Science Beijing Key Laboratory of Neural Regeneration and Repair Capital Medical University

Copper is a microelement with important physiological functions in the ***,the excess copper ion(Cu2+) may cause severe health problems,such as hair cell apoptosis and the resultant hearing ***,the assay of Cu2+is *** integrate ionic imprinting technology（IIT） and structurally colored hydrogel beads to prepare chitosan-based ionically imprinted hydrogel beads（IIHBs） as a low-cost and high-specificity platform for Cu2+*** IIHBs have a macroporous microstructure,uniform size,vivid structural color,and magnetic *** incubated in solution,IIHBs recognize Cu2+and exhibit a reflective peak change,thereby achieving label-free *** addition,benefiting from the IIT,the IIHBs display good specificity and selectivity and have an imprinting factor of 19.14 at 100 μmol·*** features indicated that the developed IIHBs are promising candidates for Cu2+detection,particularly for the prevention of hearing loss.

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Bulk diffusion: key factor of limiting the kinetics of CO2 capture on sodium carbonate 12

Bulk diffusion: Key factor of limiting the kinetics of CO2 c...

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12th Asia-Pacific Conference on Combustion, ASPACC 2019

作者： Cai, Tianyi Chen, Xiaoping Karl Johnson, J. Liu, Daoyin Ma, Jiliang Liang, Cai Wu, Ye Zhao, Chuanwen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing Jiangsu210096 China Department of Chemical and Petroleum Engineering University of Pittsburgh Pittsburgh Pennsylvania15261 United States MIIT Key Laboratory of Thermal Control of Electronic Equipment and Advanced Combustion Laboratory School of Energy and Power Engineering Nanjing University of Science and Technology Nanjing Jiangsu210094 China Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control School of Energy and Mechanical Engineering Nanjing Normal University Nanjing Jiangsu210042 China

Sodium carbonate (Na2CO3) is a competitive solid sorbent for CO2 capture from humid flue gas because of its high abundance, low energy consumption and no by-products. However, slow kinetics of sorption process limit this technology to be a practical option for large-scale power plants. The very first step to improve its kinetics is to understand the rate-limiting steps of the carbonation reaction in this gas-solid system. Two possible scenarios that could result in diffusion control of the reaction rate have been investigated, including counter diffusion of ion defects between NaHCO3/Na2CO3 layers (Scenario 1) and one-way diffusion of molecule in NaHCO3 layer (Scenario 2). The bicarbonate groups and proton formation on NaHCO3 surface was observed on picosecond time scales. We calculated the formation energies of H+ vacancy (VH+)/interstitial Na+ (INa+) in bulk NaHCO3 (0.03 eV) and interstitial H+ (IH+)/Na+ vacancy (VNa+) in bulk Na2CO3 (0.89 eV). The diffusion barriers of VH+ and INa+ in bulk NaHCO3 were 0.27 eV and 0.77 eV, respectively. We have also identified that CO2 diffusion in bulk NaHCO3 is much more energetically unfavorable. Our results indicate that Na2CO3 bulk carbonation reaction is followed by Scenario 1 and INa+ diffusion in bulk NaHCO3 is the rate-limiting step. © Asia-Pacific Conference on Combustion, ASPACC *** right reserved.

关键词： Carbon dioxide

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Coupled Chemical Reactions: Effects of Electric Field, Diffusion and Boundary Control

arXiv

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arXiv 2023年

作者： Xu, Shixin Eisenberg, Robert Song, Zilong Huang, Huaxiong Zu Chongzhi Center for Mathematics and Computational Sciences Duke Kunshan University 8 Duke Ave Jiangsu Kunshan China Department of Applied Mathematics Illinois Institute of Technology ChicagoIL60616 United States Department of Physiology and Biophysics Rush University Chicago IL60612 United States Math and Statistics Department Utah State University Old Main Hill Logan UT84322 United States Research Center for Mathematics Advanced Institute of Natural Sciences Beijing Normal University Guangdong Zhuhai519088 China Guangdong Provincial Key Laboratory of Interdisciplinary Research and Application for Data Science BNU-HKBU United International College Guangdong Zhuhai519088 China Laboratory of Mathematics and Complex Systems MOE Beijing Normal University Beijing100875 China Department of Mathematics and Statistics York University TorontoONM3J 1P3 Canada

MSC Codes 92E20, 92B05, 35Q92Chemical reactions involve the movement of charges, and this work presents a mathematical model for describing chemical reactions in electrolytes. The model is developed using an energy variational method that aligns with classical thermodynamics principles. It encompasses both electrostatics and chemical reactions within consistently defined energetic and dissipative functionals. Furthermore, the energy variation method is extended to account for open systems that involve the input and output of charge and mass. Such open systems have the capability to convert one form of input energy into another form of output energy. In particular, a two-domain model is developed to study a reaction system with self-regulation and internal switching, which plays a vital role in the electron transport chain of mitochondria responsible for ATP generation-a crucial process for sustaining life. Simulations are conducted to explore the influence of electric potential on reaction rates and switching dynamics within the two-domain system. It shows that the electric potential inhibits the oxidation reaction while accelerating the reduction reaction. © 2023, CC BY.

关键词： Open systems

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MetaGP: A Generative Foundation Model Integrating Electronic Health Records and Multimodal Imaging for Addressing Unmet Clinical Needs

SSRN

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SSRN 2024年

作者： Liu, Fei Zhou, Hongyu Wang, Kai Yu, Yunfang Gao, Yuanxu Miao, Hanpei Zou, Zixing Li, Zhuomin Li, Bingzhou Wang, Lan Sun, Shanshan Liu, Yang Hou, Taiwa Fok, Manson Patil, Nivritti Gajanan Yin, Yun Xue, Kanmin Li, Ting Oermann, Eric Qu, Jia Zhang, Kang Institute for AI in Medicine Faculty of Medicine Macau University of Science and Technology China Institute for Advanced Study on Eye Health and Diseases Wenzhou Medical University Wenzhou China National Cancer Center National Clinical Research Center for Cancer Cancer Hospital Chinese Academy of Medical Sciences Peking Union Medical College Beijing China National Clinical Research Center for Ocular Diseases Eye Hospital Wenzhou Medical University Wenzhou China Department of Big Data and Biomedical AI College of Future Technology Peking University Peking-Tsinghua Center for Life Sciences Beijing China Sun Yat-sen Memorial Hospital Sun Yat-sen University Guangzhou China Dongguan Hospital Southern Medical University Dongguan China Guangzhou National Laboratory Guangzhou China Department of Ophthalmology The Third People’s Hospital of Changzhou Jiangsu China Centro Hospitalar Conde de São Januário China Nuffield Department of Neuroscience Oxford University Oxford United Kingdom NYU Langone Medical Center New York University United States Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation China Center for Biomedicine and Innovations China

Artificial Intelligence (AI) has transformed specialized diagnostics, yet current models often lack the cross-disciplinary flexibility required for comprehensive clinical care, potentially limiting their effectiveness in real-world applications. Here, we introduce Meta General Practitioner (MetaGP) , a generative foundation model with 13 billion parameters trained on over ten million electronic health records (EHRs) and a wide range of medical literature and academic books, designed to provide accurate diagnostic support across a spectrum of clinical scenarios, including rare disease diagnosis, emergency condition identification and multimodal medical report generation. MetaGP demonstrated significant performance gains over GPT-4, achieving higher diagnostic accuracy and reducing the incidence of potentially harmful recommendations. In rare disease diagnoses, MetaGP achieved a mean diagnostic score of 1.57, notably exceeding GPT-4’s score of 0.93 and closely matching the performance of experienced clinicians. For emergency condition diagnoses, MetaGP achieved an average score of 1.59, outperforming GPT-4’s 1.19 and proving especially beneficial in supporting junior and mid-level clinicians by improving diagnostic accuracy by 53% and 46%, respectively. We rigorously evaluated MetaGP’s capabilities using a combination of human and automated assessments, benchmarking it against state-of-the-art models, including Med-Flamingo and LLaVA-Med, for chest X-ray (CXR) and computed tomography (CT) report generation. MetaGP consistently delivered high-quality reports, with radiologists rating the AI-generated outputs as comparable or superior to physician-authored reports in a significant proportion of cases. These findings highlight MetaGP’s potential as a reliable and versatile tool for clinical decision support, capable of addressing diagnostic challenges across diverse medical domains. © 2024, The Authors. All rights reserved.

关键词： Electronic health record

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Fractal characterization of the oxidation structure in ZrB2-SiC composite after thermal shocks 2

Fractal characterization of the oxidation structure in ZrB2-...

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2nd International Conference on Modeling in Mechanics and Materials

作者： Qi, F. Meng, S.H. Wu, P. Guo, H. Zhao, D. Chen, T. School of Mechanical and Electric Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou215021 China Science and Technology on Advanced Composites in Special Environment Laboratory Harbin Institute of Technology Harbin150080 China Artificial Organ Laboratory Bio-manufacturing Research Centre School of Mechanical and Electric Engineering Soochow University Suzhou215021 China Jiangsu Provincial Key Laboratory of Advanced Robotics Robotics and Microsystems Center Soochow University Suzhou215021 China

The effect of the oxidation structure on the residual strength of ZrB2-SiC composite after repeated thermal shocks was investigated. The silica-rich glasses on the oxidation surface and pores in the oxidation layer were characterized using the fractal geometry method. Their fractal dimensions were calculated by Box-counting method. The increase of silica-rich glasses and the decrease of pores contributed to the increase of the residual strength of ZrB2-SiC after thermal shocks. © Published under licence by IOP Publishing Ltd.

关键词： Thermal shock

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Influence of substrate plate heating on the fabrication of Al-12Si produced by selective laser melting

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Transactions of the Indian National Academy of Engineering 2021年第4期6卷 1027-1036页

作者： Xi, L. X. Ma, P. Jia, Y. D. Chaubey, A. K. Wang, Z. Prashanth, K. G. College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components Nanjing University of Aeronautics and Astronautics Nanjing China School of Materials Engineering Shanghai University of Engineering Science Shanghai China School of Materials Science and Engineering Shanghai University Shanghai China CSIR–Institute of Minerals and Materials Technology (IMMT) Bhubaneshwar India Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials South China University of Technology Guangzhou China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou China Department of Mechanical and Industrial Engineering Tallinn University of Technology Tallinn Estonia Erich Schmid Institute of Materials Science Austrian Academy of Sciences Leoben Austria CBCMT School of Mechanical Engineering Vellore Institute of Technology Vellore India

Substrate plate heating is one of the methodology followed during the selective laser melting (SLM) process, to reduce the cooling rate of the process, to reduce the internal stresses in the SLM-fabricated material, to reduce the cracking tendency in some alloys. However, employing substrate plate heating with larger samples may introduce anisotropy and inhomogeneity in both microstructure and properties. To study this effect, Al-12Si samples were fabricated using the SLM process. The samples were produced with (473 K and 673 K) and without substrate plate heating. The sample was also subjected to external treatment at 473 K and 673 K to compare the microstructural effects with the substrate plate-heated samples. The microstructural investigation was carried out using optical and scanning electron microscopy and the structural characterization using X-ray diffraction. The mechanical properties of the samples were tested using room temperature tensile test and hardness maps. The results suggest that the samples fabricated using substrate plate heating lead to anisotropy along the length scale, which is not desirable.

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Electrically controllable magneto-optic effects in a two-dimensional hexagonal organometallic lattice

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Physical Review B 2020年第3期101卷 035423-035423页

作者： Haixia Da Qi Song Hongwei Dai Peng Dong Qiaoliang Bao Huapeng Ye Yipeng An Jing Chen Yandong Guo Xiangfu Wang Xiaohong Yan College of Electronic and Optical Engineering & College of Microelectronics Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210046 China and Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing 210023 China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 China and National Center for International Research on Green Optoelectronics South China Normal University Guangzhou 510006 China College of Physics and Materials Science & International United Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal University Xinxiang 453007 China School of Material Science and Engineering Jiangsu University Zhenjiang 212013 China

Magneto-optical materials represent a type of materials that intrinsically or extrinsically lack time-reversal symmetry and exhibit the nonreciprocal magneto-optical effects, which have been extended to two-dimensional layered materials recently. However, the corresponding magneto-optical investigations have thus far been limited to two-dimensional layered inorganic materials. Here we theoretically report the generation and manipulation of the magneto-optical effects in two-dimensional layered organic materials. It is found that monolayer hexagonal organometallic lattice intrinsically supports the nonzero Faraday rotation angle due to the joint contributions from spin-orbit coupling as well as its inherent ferromagnetism. In addition, its evolutions of the band structures and Berry curvatures induced by an external electric field grant us the controllable magneto-optical effects. The nontrivial magneto-optical effects of two-dimensional layered organic materials, in conjunction with their electric-field control, considerably endow the available organic magneto-optical candidates beyond what are currently used in the present magneto-optical fields.

关键词： Ferromagnetism Magneto-optical effect Optical conductivity Honeycomb lattice Organometallic materials Linear response theory

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Rheology control of low-density geopolymer paste for well cementing application: Synergistic effects of precursor fineness and sodium gluconate

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Case Studies in Construction Materials 2025年 22卷

作者： Chao Sun Xuan Gao Jiafeng Kong Hao Zhang Hongkai Chen Hongbo Sun Lili Xue Chunxu Ma Zuhua Zhang COSL Oilfield Chemicals R&D Institute Sanhe Hebei 065201 China School of Materials Science and Engineering Yancheng Institute of Technology Yancheng Jiangsu 224051 China Centre for Future Materials University of Southern Queensland Toowoomba QLD 4350 Australia Shandong Provincial Key Laboratory of Green and Intelligent Building Materials University of Jinan Jinan 250022 China College of Civil Engineering and Architecture Jiaxing University Jiaxing Zhejiang 314001 China Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and Engineering Tongji University Shanghai 201804 China

The precise regulation of rheological properties in low-density cementitious paste is crucial for successful deepwater well cementing operations, particularly when implementing innovative geopolymer technology. This study investigated the synergistic effects of precursor fineness and sodium gluconate (SG) addition on the rheological properties and performance characteristics of low-density geopolymer paste. The results showed that the ultrafine fly ash and slag additions reduced liquid film thickness of the precursor particles, and consequently enhanced both yield stress and plastic viscosity of the paste. Despite exhibiting shear-thickening behavior, the homogeneity and stability were improved. The reaction kinetics was accelerated, achieving the maximum 1-day compressive strength of 18.1 MPa. Formation of more C-(A)-S-H gel phase in the binder effectively transformed capillary pores into gel pores, resulting in a more compact structure. In comparison, the SG addition demonstrated the opposite rheological modification effects to improve the flowability of paste, without having a notable retardation effect on the setting time. The combination of optimized precursor fineness and SG addition presents a technically viable solution for deepwater cementing applications requiring precise rheological control for low-density geopolymer paste.

关键词： Low-density geopolymer Rheology Precursor fineness Sodium gluconate Well cementing

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