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Liquid metal E-tattoo

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Science China(Technological Sciences) 2023年第6期66卷 1551-1575页

作者： GAO Shang CUI ZiLiang WANG XueLin sun xuyang School of Engineering Medicine Beihang UniversityBeijing 100191China

The past twenty years have witnessed a rapid advancement in medical devices and healthcare *** by the growing demand for personalized,preventive,predictive and participatory medicine,the on-skin portable healthcare system with fascinating merits has attracted great ***,the electronic tattoo(E-tattoo)that can form intimate contact and deform with the skin movement is regarded to play an important role in further healthcare monitoring and disease *** with the combination of fluidity and metallic properties,liquid metals(LMs)have become an emerging class of functional materials and are regarded as the ideal candidate for soft ***,we highlighted the key advantages of LM in E-tattoo,classified the LM based conductive inks,and summarized the important pattern technologies in fabrication of LM *** typical applications of healthcare detection and therapy were also ***,outlooks were provided for future E-tattoo development.

关键词： liquid metal E-tattoo flexible electronic skin printing technologies healthcare applications

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Numerical solution of oscillatory flow of Maxwell fluid in a rectangular straight duct

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Applied Mathematics and Mechanics(English Edition) 2019年第11期40卷 1647-1656页

作者： xuyang sun Shaowei WANG Moli ZHAO Qiangyong ZHANG Department of Engineering Mechanics School of Civil Engineering Shandong University

A numerical analysis is presented for the oscillatory flow of Maxwell fluid in a rectangular straight duct subjected to a simple harmonic periodic pressure *** numerical solutions are obtained by a finite difference scheme *** stability of this finite difference scheme method is *** distributions of the velocity and phase difference are given numerically and *** effects of the Reynolds number,relaxation time,and aspect ratio of the cross section on the oscillatory flow are *** results show that when the relaxation time of the Maxwell model and the Reynolds number increase,the resonance phenomena for the distributions of the velocity and phase difference enhance.

关键词： Maxwell fluid oscillatory flow finite difference method rectangular duct

Effects of high temperature and high relative humidity drying on moisture distribution,starch microstructure and cooking characteristics of extruded whole buckwheat noodles

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Journal of Future Foods 2024年第2期4卷 159-166页

作者： Linghan Meng xuyang sun Yan Zhang Xiaozhi Tang Key Laboratory of Grains and Oils Quality Control and Processing College of Food Science and EngineeringCollaborative Innovation Center for Modern Grain Circulation and SafetyNanjing University of Finance and EconomicsNanjing 210023China Hebei Key Laboratory of Food Safety Hebei Food Inspection and Research InstituteShijiazhuang 050091China

Drying is a key step in starch noodle *** effects of high temperature(60,70,80°C)and high relative humidity(65%,75%,85%)drying(HTHD)on the moisture distribution,starch microstructure and cooking characteristics of extruded whole buckwheat noodles were *** to the conventional hot-air drying(CHAD)at 40°C,the increase in drying temperature(60–80°C)and the decrease in relative humidity(85%–65%)significantly improved drying efficiency of the extruded *** adjusting drying temperature and relative humidity,the rate of moisture migration in noodles and phase transition of starch could be appropriately *** optimum drying parameters(T70H75,70°C drying temperature and 75%relative humidity)showed smooth and dense network structure,resulting in the lowest cooking loss(6.61%),broken rate(0%),highest hardness(1695.17 g)and springiness(0.92).However,the total flavonoid content(TFC)and the total phenolic content(TPC)reduced by 6.81%–28.50%and 7.19%–53.23%in contrast to CHAD,and the color of buckwheat noodles became darker through *** findings showed the potential of HTHD for increasing drying efficiency and improving buckwheat noodle *** appropriate drying parameters could maintain a balanced relationship between moisture migration in noodles and phase transition of starch,which resulted in better cooking quality for extruded whole buckwheat *** a study is valuable for regulating the process conditions of buckwheat-based foods and promoting its commercial utilization.

关键词： Extruded whole buckwheat noodle High temperature and high relative humidity drying Moisture distribution Starch microstructure Cooking characteristics

Liquid Metal Transformable Machines

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Accounts of Materials Research 2021年第12期2卷 1227-1238页

作者： Hongzhang Wang Sen Chen Bo Yuan Jing Liu xuyang sun Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing 100084China Beijing Key Lab of Cryobiomedical Engineering and Key Lab of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Medical Science and Engineering Beihang UniversityBeijing 100191China

CONSPECTUS:Conventional robots can accomplish defined tasks but often encounter troubles when handling irregular objects under unstructured *** robots,with supercompliance,large transformation,and high environmental adaptability,hold big promise for delicate manipulations such as grasping soft objects or delivering precious biomedical *** a step further,if soft robots are endowed with the extraordinary behaviors to freely transform among different morphologies and constructions just like those already existing in literature and science fiction films,more fantastic challenges can be *** one of the most potential robotic soft materials,liquid metals have been given sufficient expectations on realizing the transformable machines that might fundamentally reform modern daily ***,inspiring discoveries on controllable transformations of the liquid metal have been obtained surprisingly and tremendous efforts have been made over the past decade,indicating a significant step toward such a formidable *** is clear that the discovery of liquid metal-based largescaled transformation with several hundred-fold fast change on the surface area opens a brand new direction of manufacturing future transformable *** unusual findings on a self-fueled liquid metal with biological life-like behavior to freely explore the unknown space that solves the energy supply issue also came into being,holding big promise for making bionic transformable *** Account aims to systematically sort out the developmental history of liquid metal transformable machines with special focus on the fundamental scientific discoveries,the underlying mechanisms,and the potential applied scenarios based on liquid metal enabled solid−liquid *** fantastic properties and unique transformation capabilities of liquid metals have built the basis for a new era of designing soft robotics and we believe that liquid metal transformable machines a

关键词： transformation machines Liquid

Semi-liquid metal and adhesion-selection enabled rolling and transfer(SMART) printing:A general method towards fast fabrication of flexible electronics

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Science China Materials 2019年第7期62卷 982-994页

作者： Rui Guo Siyuan Yao xuyang sun Jing Liu Department of Biomedical Engineering School of Medicine Tsinghua University Beijing 100084 China Beijing Key Lab of CryoBiomedical Engineering and Key Lab of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China

Recent breakthrough in eutectic gallium-indium alloy has revealed its great potential in modern electronic engineering. Here, we established a general method towards super-fast fabrication of flexible electronics via semi-liquid metal and adhesion-selection enabled rolling and transfer (SMART) printing on various substrates. Based on the semiliquid metal and its adhesion-difference on specifically designed target materials, we demonstrated that the rolling and transfer printing method could serve to rapidly manufacture a wide variety of complicated patterns with high resolution and large size. The process is much faster than most of the currently existing electronic fabrication strategies including liquid metal printing ever developed, and the cost either in time or consumption rate is rather low. As illustrated, a series of functional flexible and stretchable electronics such as multiple layer and large area circuits were fabricated to show their superior merit in combination with electrical conductivity and deformability. In addition, it was also demonstrated that the electronics fabricated in this way exhibited good repeatablity. A most noteworthy advantage is that all the fabrication processes could be highly automatic in the sense that user-friendly machines can thus be developed. This method paves a practical way for super-fast soft electronics manufacture and is expected to play an important role in the coming industry and consumer electronics.

关键词： Ni-EGaln semi-liquid metal fast fabrication adhesion difference flexible electronics

基于机器视觉的固体火箭发动机喷管喉径测量方法

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固体火箭技术 2023年第1期46卷 119-127页

作者：孙旭阳沈飞谢俊彦西安航天动力测控技术研究所西安710025

针对固体火箭发动机喷管喉径的精确测量问题,提出了一种基于机器视觉的方案,采用了基于深度学习的图像分割技术和单目测量技术。通过平行面激光得到喷管喉部的投影图像,对获得的图像利用图像语义分割网络模型进行提取,进而得到准确的喷... 详细信息

针对固体火箭发动机喷管喉径的精确测量问题,提出了一种基于机器视觉的方案,采用了基于深度学习的图像分割技术和单目测量技术。通过平行面激光得到喷管喉部的投影图像,对获得的图像利用图像语义分割网络模型进行提取,进而得到准确的喷管喉部区域,对该喉部区域通过单目测量技术完成喷管喉径的测量。通过实验测量了不同条件下的发动机喷管喉径,验证了方法的可行性,结果表明,相比于传统测量方法,在精度、效率和稳定性上有了显著提升。该方法对于固体火箭发动机的性能测试具有重要意义,在实际工程中具有良好应用前景。

关键词：喷管喉径测量机器视觉图像处理深度学习

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基于CT影像的人体踝关节三维重建

中国医学物理学杂志 2022年第7期39卷 850-855页

作者：孙旭阳石更强上海理工大学健康科学与工程学院上海200093

以踝关节的生理解剖结构为理论依据,利用踝关节的CT图像作为二维数据源,通过医学图像处理软件Mimics建立踝关节的三维模型,然后使用3-matic对三维模型的网格进行优化,最后对优化前后的模型进行对比分析。结果发现经过优化后的踝关节三... 详细信息

以踝关节的生理解剖结构为理论依据,利用踝关节的CT图像作为二维数据源,通过医学图像处理软件Mimics建立踝关节的三维模型,然后使用3-matic对三维模型的网格进行优化,最后对优化前后的模型进行对比分析。结果发现经过优化后的踝关节三维模型在结构上与人体真实的踝关节结构并无明显的差异,精确程度满足要求,对于患者病情的分析及治疗方案的确立具有重要的指导意义。

关键词： CT影像踝关节医学图像处理三维重建

基于离群点检测和自适应参数的三支DBSCAN算法

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计算机应用研究 2024年第7期41卷 1999-2004页

作者：李志聪孙旭阳哈尔滨师范大学计算机科学与信息工程学院哈尔滨150025

针对经典的DBSCAN算法存在难以确定全局最优参数和误判离群点的问题,该算法首先从选择最优参数角度出发,通过数据集的分布特征生成Eps和MinPts列表,将两个列表中的参数进行全组合操作,把不同的参数组合依次进行聚类,从而寻找准确率最高... 详细信息

针对经典的DBSCAN算法存在难以确定全局最优参数和误判离群点的问题,该算法首先从选择最优参数角度出发,通过数据集的分布特征生成Eps和MinPts列表,将两个列表中的参数进行全组合操作,把不同的参数组合依次进行聚类,从而寻找准确率最高点对应的参数。最后从离群点角度出发,将三支决策思想与离群点检测LOF算法进行结合。该算法与多种聚类算法进行效果对比分析,结果表明该算法能够全自动化选择全局最优参数,并提高聚类算法的准确性。

关键词： DBSCAN算法三支聚类自适应参数离群点检测

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悬臂梁式局域共振单元的弹性波带隙特性研究

西北工业大学学报 2024年第4期42卷 643-651页

作者：孙旭阳王中周景军王谦徐靖鉴中国船舶集团有限公司第七〇五研究所陕西西安710077 西北工业大学航空学院陕西西安710072

提出了一种由通孔悬臂梁和质量块组成的新型声子晶体构型,并对包含该构型的二维周期阵列板的带隙特性进行了数值分析和实验验证。结果表明,所提出结构中存在多条弯曲波带隙,其形成机理是由于基体中弹性波与局域共振结构谐振特性发生耦合... 详细信息

提出了一种由通孔悬臂梁和质量块组成的新型声子晶体构型,并对包含该构型的二维周期阵列板的带隙特性进行了数值分析和实验验证。结果表明,所提出结构中存在多条弯曲波带隙,其形成机理是由于基体中弹性波与局域共振结构谐振特性发生耦合,且带隙的宽度与耦合强度相关,进一步研究发现模态有效质量占比是模态是否产生带隙的一个考量标准。同时,研究了局域共振单元的晶胞常数和几何参数对带隙的调控规律。基于以上研究,通过改进原始局域共振结构,得到了更加丰富的带隙特征,为宽频带隙的设计提供了一种可行的思路。通过仿真计算和实验得到了有限周期结构板的振动传递率,其衰减频段与带隙范围基本吻合,表明了该结构具有良好的低频减振性能,且结构简单,在减振降噪领域具有广阔的工程应用前景。

关键词：超材料局域共振振动控制带隙机理