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Manipulation of gold coated microspheres using electrorotation

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Science China(Technological Sciences) 2011年第3期54卷 643-649页

作者： jiang hongyuan REN YuKun HAN XiaoJun TAO Ye LI ShanShan School of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China School of Chemical Engineering and Technology Harbin Institute of Technology Harbin 150001 China State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

The electrorotation of microspheres coated with conductive surface is a novel and important technology for label-free biosensors. Using the electroless plating approach, the polystyrene microspheres with 15 μm and 25 μm in diameters were coated with 50 nm gold layer in thickness. The electrorotation experiments on those gold coated polystyrene microspheres (GCPMs) were carried out. The results showed that they rotated in the opposite direction of the electric field in a low frequency range (100-100 kHz), and the maximum rotation speed was higher than that of uncoated microspheres. Based on the theory of traveling wave electroosmosis(TWEO) and induced charge electroosmosis (ICEO), the electrorotation of GCPMs was quantitively analyzed and confirmed by observing the fluid flow around GCPM. The equations describing the electroration speed of GCPMs were proposed, which are consistent with the experiment results.

关键词： electrorotation gold coated microspheres TWEO ICEO

Influence of Disk Surface Bulge and Hard Disk Operating Conditions on Hard Disk Gas Film Heat Transfer

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Journal of Harbin Institute of Technology(New Series) 2021年第1期28卷 20-29页

作者： Qinyang Zeng Hongrui Ao hongyuan jiang School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China

When the hard disk is running,the cantilever of the magnetic head imposes a certain preload on the slider of the magnetic head to form a wedge space with the *** the disk rotates,the viscous gas enters the convergence gap so that the hydrodynamic pressure generates balance with the force acting on the cantilever,ensuring that the magnetic head flies above the disk in a stable altitude and forms a stable air film between the magnetic head and the disk called air *** the flight altitude is low,the bulge on the disk surface will affect the pressure distribution of air ***,the pressure affects the heat flux of air bearing by influencing the heat transfer parameters,such as thermal conductivity,dynamic viscosity,gas density,and the molecular free path of the *** this paper,heat transfer parameters influence on gas film heat transfer were *** on this,flathead slider and Tri-pad barotropic magnetic head slider were compared,and the effects of disk operating conditions at the average temperature of air bearing were also studied,such as pitch and roll angle of the magnetic head slider,the disk s speed,and the bulge on disk surface.

关键词： air bearing heat transfer Tri-pad barotropic head slider

Study on Lubricant Materials Transfer between Head and Disk

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Journal of Harbin Institute of Technology(New Series) 2020年第6期27卷 17-26页

作者： Qinyang Zeng Hongrui Ao hongyuan jiang School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China

With the increase of hard disk storage density,the flying height of magnetic head sliders has become lower in recent years,which makes it easier for lubricant materials to transfer between the magnetic head and *** ability for lubricant materials to transfer is not only related to the operating conditions of disk but also related to the types of lubricant materials(Perfluoropolyether,PFPE)and diamond⁃like carbon(DLC)coating applied to the *** on the principle of molecular dynamics,this study established the adsorption models on disks with different carbon content and the diffusion models of several common PFPE molecules in ***,the adsorption energy and the diffusion coefficients of different models were ***,the molecular weight,the molecular structure,the lubricant material􀆳s end functional groups,and the disk􀆳s carbon content were found to have influence on the transfer ability of lubricant *** particular,the latter two factors have further influence.

关键词： molecular dynamics adsorption energy diffusion coefficient

Titanium-Promoted Rh-Mn-Li/SiO_(2) for C_(2)-Oxygenates Synthesis from Syngas: Effect of Low Titanium Loading

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Journal of Natural Gas Chemistry 2005年第4期14卷 199-206页

作者： Weimiao Chen Yunjie Ding Dahao jiang Zhendong Pan hongyuan Luo Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Addition of small amounts of Ti oxide to Rh-Mn-Li/SiO2 catalysts unexpectedly results in an increase in their activity for C2-oxygenates production from syngas. Continuously increasing Ti loading depresses catalyst activity. The effect of Ti at low level on the catalytic properties in the CO/H2 reaction has been studied by various techniques. The characterization results indicate that the existence of Ti species has no effect on the ability of Rh to dissociate CO molecules and on the Rh dispersion. On the other hand, it is shown that trace amount of Ti strengthens the adsorption of CO and increases the amount of strongly adsorbed CO that can be hydrogenated and therefore improves the activity. The RhMn interaction intensity, which can be regulated by Ti doping, seems to be the main reason to achieve higher yield of the desired reaction products.

关键词： rhodium titanium CO hydrogenation C2-oxygenates syngas conversion

Oscillation,positioning,orientation and length limit of mitotic spindles

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Oscillation,positioning,orientation and length limit of mito...

Photothermal‑Triggered Structural Change of Nanofiber Scaffold Integrating with Graded Mineralization to Promote Tendon–Bone Healing

第十一届全国生物力学学术会议暨第十三届全国生物流变学学术会议

作者： hongyuan jiang Department of Modern Mechanics CAS Key Laboratory of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of China

Mitotic spindle is the main subcellular structure that accomplishes the chromosome segregation between daughter cells during cell ***,how mitotic spindles sense and control their size,position and movement inside the cell still remains *** we focus on the size effects of mitotic spindles,i.e.,how cell size controls various interesting phenomena in the metaphase,such as oscillation,positioning,orientation

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Advanced Fiber Materials 2022年第4期4卷 908-922页

作者： Chenghao Yu Tianrui Wang Hongcui Diao Na Liu Yi Zhang hongyuan jiang Peng Zhao Zhengyi Shan Zewen Sun Tong Wu Xiumei Mo Tengbo Yu Department of Sports Medicine Affiliated Hospital of Qingdao UniversityQingdao 266061ShandongChina Institute of Neuroregeneration and Neurorehabilitation Qingdao Medical CollegeQingdao UniversityQingdao 266071ShandongChina Shandong Key Laboratory of Textile Materials for Healthcare Collaborative Innovation Center for Eco-Textiles of Shandong Province and the Ministry of Education308 Ningxia RoadQingdao 266071ShandongChina State Key Lab for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Department of Endocrinology Jinan Central Hospital Affiliated To Shandong UniversityNo.105 Jiefang RoadJinan 250013ShandongChina

Scaffolds functionalized with graded changes in both fiber alignment and mineral content are more appealing for tendon-bone *** study reports the healing of rotator cuff injury using a heterogeneous nanofiber scaffold,which is associated with a structural gradating from aligned to random and an increasing gradient of mineral content in the same *** photothermal-triggered structural change of a nanofiber scaffold followed by graded mineralization is key to constructing such *** type of scaffold was found to be biocompatible and provide beneficial contact guidance in the manipulation of tendon-derived stem cell morphologies in ***,tenogenic and osteogenic differentiation of tendon-derived stem cells were simultaneously achieved using the fabricated *** vivo investigation also showed the improved healing of rabbit rotator cuff injuries based on immunohistochemical analysis and biomechanical investigation that indicates the promising potential of a dual-gradient nanofiber scaffold in clinical tendon-bone healing.

关键词： Photothermal welding Graded mineralization Nanofiber scaffold Tendon-derived stem cells Tendon-tobone healing

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构建和谐社会视野下的大学生思想政治教育

江淮论坛 2007年第6期 122-126页

作者：蒋洪元南京财经大学马克思主义学院江苏南京210046

我国在经济全球化、政治多极化、文化多元化的国际大背景下构建社会主义和谐社会,对人才素质提出了新的更高的要求。为适应新形势,培养为构建和谐社会建功立业的高素质人才,本文就加强大学生思想政治教育,从转换思想政治教育的视角、发... 详细信息

我国在经济全球化、政治多极化、文化多元化的国际大背景下构建社会主义和谐社会,对人才素质提出了新的更高的要求。为适应新形势,培养为构建和谐社会建功立业的高素质人才,本文就加强大学生思想政治教育,从转换思想政治教育的视角、发挥政治理论课的主渠道作用、打造和谐优雅的校园文化和建立健全长效机制四个方面,提出了积极的应对措施。

关键词：和谐社会大学生思想政治教育

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金属橡胶材料非线性吸声特性研究

机械工程学报 2010年第19期46卷 70-77页

作者：姜洪源武国启哈尔滨工业大学机电工程学院哈尔滨150001

理论及试验研究适用于腐蚀性介质、大温差等恶劣环境吸声降噪需要的金属橡胶材料非线性吸声特性。根据金属橡胶材料线性理论和Forchheimer非线性修正方法,建立金属橡胶材料非线性有效密度计算式及声质点速度方程。由金属橡胶材料置于刚... 详细信息

理论及试验研究适用于腐蚀性介质、大温差等恶劣环境吸声降噪需要的金属橡胶材料非线性吸声特性。根据金属橡胶材料线性理论和Forchheimer非线性修正方法,建立金属橡胶材料非线性有效密度计算式及声质点速度方程。由金属橡胶材料置于刚性墙和带有空气层的两种吸声结构边界条件,建立求解金属橡胶材料吸声参数的吸声模型。通过计算及试验测量,分析材料结构参数和入射声压级对金属橡胶材料非线性吸声特性影响关系。研究结果表明,在高声压级声波作用下,非线性吸声特性曲线变化规律与低声压级作用下呈现出的线性特性相近,不同入射声压级和结构参数对金属橡胶材料非线性吸声特性影响不同,材料厚度和静态流阻率越大,金属橡胶材料非线性吸声效应越小。

关键词：金属橡胶非线性吸声特性建模

多层波纹钢板转子阻尼器能量耗散系数计算方法

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机械工程学报 2008年第7期44卷 129-133页

作者：姜洪源郝德刚孙毅 АНТИПОВ В А 哈尔滨工业大学机电工程学院哈尔滨150001 哈尔滨工业大学航天学院哈尔滨150001 俄罗斯萨玛拉铁道工程学院萨玛拉443066

多层波纹钢板转子阻尼器是利用干摩擦原理实现转子阻尼减振的支撑零件。这种阻尼器能在高低温等恶劣环境下工作,同时阻尼特性受转子偏心影响小,可以通过改变阻尼器钢板的厚度提高阻尼器的能量耗散性能。在有限元法和摩擦学原理的基础上... 详细信息

多层波纹钢板转子阻尼器是利用干摩擦原理实现转子阻尼减振的支撑零件。这种阻尼器能在高低温等恶劣环境下工作,同时阻尼特性受转子偏心影响小,可以通过改变阻尼器钢板的厚度提高阻尼器的能量耗散性能。在有限元法和摩擦学原理的基础上进行理论分析,根据多层波纹钢板转子阻尼器的能量耗散分布,提出多层钢板阻尼器的能量耗散系数的计算方法。该方法首先通过有限元分析获得接触应力,然后采用Mindlin接触模型推导出两层干摩擦接触表面摩擦耗能的计算公式,最后得出转子阻尼器整体的能量耗散系数。试验证明了该计算方法是正确可行的,具有较高计算精度。

关键词：计算方法阻尼器转子系统耗散系数