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基于改进的DISK算法的农林航拍图配准研究
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作者 董一波 刘立群 《软件工程》 2025年第1期28-32,共5页
针对无人机的农林航拍图像配准算法存在特征点识别较少、特征点匹配不精准等问题,提出了一种改进的离散关键点(Discrete Key point,DISK)算法。该算法首先采用梯度策略DISK算法对特征点进行有效描述;其次采用基于深度学习局部特征的匹... 针对无人机的农林航拍图像配准算法存在特征点识别较少、特征点匹配不精准等问题,提出了一种改进的离散关键点(Discrete Key point,DISK)算法。该算法首先采用梯度策略DISK算法对特征点进行有效描述;其次采用基于深度学习局部特征的匹配方法进行预匹配;最后利用RANSAC算法去除离群点,筛选匹配结果。为验证算法的有效性,选取了几组农业航拍图像的数据集进行实验比较。实验结果显示,与经典的SIFT、Dark feat算法及原始的DISK算法相比,改进的DISK算法显著提高了匹配精度,匹配精度由41.7%提升至98.9%,充分满足农林航拍图的匹配需求。 展开更多
关键词 农林航拍图 梯度策率 局部特征 图像配准 disk算法
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Probing the Kinematic Signatures of Planet Formation in the Gas Disk of MWC 480
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作者 Min Zhao Haochuan Yu Zhengxiang Li 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2024年第6期110-118,共9页
The disk around MWC 480 has shown multiple substructures in both dust and gas observations,possibly suggesting ongoing planet formation in situ.In this paper,we explore the gas kinematics of the MWC 480 disk by analyz... The disk around MWC 480 has shown multiple substructures in both dust and gas observations,possibly suggesting ongoing planet formation in situ.In this paper,we explore the gas kinematics of the MWC 480 disk by analyzing the archival Atacama Large Millimeter/submillimeter Array observations of^(12)CO(J=2-1),^(13)CO(J=2-1),and C^(18)O(J=2-1).By modeling the line-of-sight velocities,inferred from the Doppler shifts of the emission lines,we are able to decompose the three-dimensional(3D)velocity field of the disk into rotational,radial,and vertical components.Further analysis reveals the presence of large-scale gas flows in the(r,z)plane.Notably,we identify potential meridional flows across various heights as traced by all three CO isotopologues in the 80–120 au region,possibly associated with ongoing planet formation activities in this region.Moreover,we find upward flows near 200 au for all three CO isotopologues,which may point to the presence of disk winds. 展开更多
关键词 protoplanetary disks planet-disk interactions planet-star interactions
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Can near-to-mid Infrared Spectral Energy Distribution Quantitatively Trace Protoplanetary Disk Evolution?
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作者 Mingchao Liu Jinhua He +2 位作者 Zhen Guo Jixing Ge Yuping Tang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2024年第7期34-46,共13页
Infrared(IR)spectral energy distribution(SED)is the major tracer of protoplanetary disks.It was recently proposed to use the near-to-mid IR(or K-24)SED slopeαdefined between 2 and 24μm as a potential quantitative tr... Infrared(IR)spectral energy distribution(SED)is the major tracer of protoplanetary disks.It was recently proposed to use the near-to-mid IR(or K-24)SED slopeαdefined between 2 and 24μm as a potential quantitative tracer of disk age.We critically examine the viability of this idea and confront it with additional statistics of IR luminosities and SED shapes.We point out that,because the statistical properties of most of the complicated physical factors involved in disk evolution are still poorly understood in a quantitative sense,the only viable way is to assume them to be random so that an idealized“average disk”can be defined,which allows theαhistogram to trace its age.We confirm that the statistics of the zeroth order(luminosity),first order(slopeα),and second order characteristics(concavity)of the observed K-24 SEDs indeed carry useful information upon the evolutionary processes of the“average disk”.We also stress that intrinsic diversities in K-24 SED shapes and luminosities are always large at the level of individual stars so that the application of the evolutionary path of the“average disk”to individual stars must be done with care.The data of most curves in plots are provided on GitHub(Disk-age package https://github.com/starage/disk-age/). 展开更多
关键词 STARS formation-stars pre-main sequence-stars protostars-infrared stars-protoplanetary disks
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Effects of multiple shapes for steady flow with transformer oil+Fe_(3)O_(4)+TiO_(2) between two stretchable rotating disks
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作者 M.RAHMAN M.TURKYILMAZOGLU Z.MUSHTAQ 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2024年第2期373-388,共16页
In this study,we examine the effects of various shapes of nanoparticles in a steady flow of hybrid nanofluids between two stretchable rotating disks.The steady flow of hybrid nanofluids with transformer oil as the bas... In this study,we examine the effects of various shapes of nanoparticles in a steady flow of hybrid nanofluids between two stretchable rotating disks.The steady flow of hybrid nanofluids with transformer oil as the base fluid and Fe_(3)O_(4)+TiO_(2)as the hybrid nanofluid is considered.Several shapes of Fe_(3)O_(4)+TiO_(2)hybrid nanofluids,including sphere,brick,blade,cylinder,and platelet,are studied.Every shape exists in the same volume of a nanoparticle.The leading equations(partial differential equations(PDEs))are transformed to the nonlinear ordinary differential equations(ODEs)with the help of similarity transformations.The system of equations takes the form of ODEs depending on the boundary conditions,whose solutions are computed numerically by the bvp4c MATLAB solver.The outputs are compared with the previous findings,and an intriguing pattern is discovered,such that the tangential velocity is increased for the rotation parameter,while it is decreased by the stretching values because of the lower disk.For the reaction rate parameter,the concentration boundary layer becomes shorter,and the activation energy component increases the rate at which mass transfers come to the higher disk but have the opposite effect on the bottom disk.The ranges of various parameters taken into account are Pr=6.2,Re=2,M=1.0,φ_(1)=φ_(2)=0.03,K=0.5,S=-0.1,Br=0.3,Sc=2.0,α_(1)=0.2,γ=0.1,E_(n)=2.0,and q=1.0,and the rotation factor K is within the range of 0 to 1. 展开更多
关键词 transformer oil Brinkman number skin friction coefficient double rotating disk Nusselt number Sherwood number
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Photocatalytic ozonation-based degradation of phenol by ZnO—TiO_(2)nanocomposites in spinning disk reactor
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作者 Xueqing Ren Jiahao Niu +5 位作者 Yan Li Lei Li Chao Zhang Qiang Guo Qiaoling Zhang Weizhou Jiao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第8期74-84,共11页
Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by adva... Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by advanced oxidation processes(AOPs).In this study,ZnO—TiO_(2)nanocomposites were prepared by solgel method,and coated on the disk of SDR by impregnation-pull-drying-calcination method.The performance of catalyst was characterized by X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,photoluminescence and ultraviolet—visible diffuse reflectance spectroscopy.Photocatalytic ozonation in SDR was used to remove phenol,and various factors on degradation effect were studied in detail.The results showed that the rate of degradation and mineralization reached 100%and 83.4%under UV light irradiation after 50 min,compared with photocatalysis and ozonation,the removal rate increased by 69.3%and 34.7%,and mineralization rate increased by 56.7%and 62.9%,which indicated that the coupling of photocatalysis and ozonation had a synergistic effect.The radical capture experiments demonstrated that the active species such as photogenerated holes(h^(+)),hydroxyl radicals(·OH),superoxide radical(·O_(2)-)were responsible for phenol degradation,and·OH played a leading role in the degradation process,while h+and·O_(2)^(-)played a non-leading role. 展开更多
关键词 Spinning disk reactor Photocatalytic ozonation ZnO-TiO_(2)nanocomposites Advanced oxidation processes
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An Asymmetric Galactic Stellar Disk Traced by OB-type Stars from LAMOST DR7
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作者 Xiaopeng Liu Hao Tian +4 位作者 Wenyuan Cui Linlin Li Jiaming Liu Zhenyan Huo Yawei Gao 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2024年第6期38-51,共14页
Using 9943 OB-type stars from LAMOST DR7 in the solar neighborhood,we fit the vertical stellar density profile with the model including a single exponential distribution at different positions(R,Φ).The distributions ... Using 9943 OB-type stars from LAMOST DR7 in the solar neighborhood,we fit the vertical stellar density profile with the model including a single exponential distribution at different positions(R,Φ).The distributions of the scale heights and scale length show that the young disk traced by the OB-type stars is not axisymmetric.The scale length decreases versus the azimuthal angleΦ,i.e.,from.■kpc withΦ=-3°to■kpc withΦ=9°.Meanwhile we find signal of non-symmetry in the distribution of the scale height of the north and south of the disk plane.The scale height in the north side shows signal of flaring of the disk,while that of the south disk stays almost constant around h_(s)=130 pc.The distribution of the displaceeent of the disk plane Z_(0)also shows variance versus the azimuthal angleΦ,which displays significant differences with the warp model constrained by the Cepheid stars.We also test different values for the position of the Sun,and the distance between the Sun and the Galactic center affects the scale heights and the displacement of the disk significantly,but that does not change our conclusion that the disk is not axisymmetric. 展开更多
关键词 Galaxy:disk galaxies:spiral stars:early-type stars:massive
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Analyzing Thermal Stratification and Nanoparticle Shapes Influence on an EMHD Ternary Nanofluid Flow amidst Two Spinning Disks
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作者 Muhammad Ramzan Saima Riasat 《Journal of Applied Mathematics and Physics》 2024年第8期3017-3025,共9页
The present study examines the thermal distribution of ternary nanofluid flow amid two spinning disks influenced by electric and magnetic fields. Keeping in view the shape of the particles, the electrically conducting... The present study examines the thermal distribution of ternary nanofluid flow amid two spinning disks influenced by electric and magnetic fields. Keeping in view the shape of the particles, the electrically conducting ternary nanofluid is analyzed with variable thermophysical features. Three types of nanoparticles namely Copper, Aluminum Oxide, and Graphene with spherical, cylindrical, and platelet shapes are taken respectively and are immersed in a (50-50)% ratio of water and ethylene glycol mixture which acts as a base fluid. The anticipated problem is addressed by employing a reliable and user-friendly numerical bvp4c built-in collocation scheme. This solution is then showcased through illustrations and tables. Strengthening the radiation results in an enhanced heat transfer rate. Radial and azimuthal velocities once rotation of disks is enhanced. The key findings provide a strong theoretical background in photovoltaic cells, solar collectors, radiators, solar water heaters, and many other applications. 展开更多
关键词 Trihybrid Nanofluid Flow Thermal Stratification Particle Shapes Spin-ning disks
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基于Hot Disk方法测量热导率的影响因素 被引量:17
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作者 王强 戴景民 何小瓦 《天津大学学报》 EI CAS CSCD 北大核心 2009年第11期970-974,共5页
基于hot disk方法测量材料的热导率时,探头热容及时间延迟的存在会直接影响热导率测量的准确度.为了有效地评估这种影响的程度,本文基于探头表面平均温升理想模型提出了一种可实现热容补偿及时间补偿的修正模型,并利用hot disk热物性分... 基于hot disk方法测量材料的热导率时,探头热容及时间延迟的存在会直接影响热导率测量的准确度.为了有效地评估这种影响的程度,本文基于探头表面平均温升理想模型提出了一种可实现热容补偿及时间补偿的修正模型,并利用hot disk热物性分析仪的数据采集系统分别搭载两个不同半径的探头对Pyroceram 9606标准材料在常温常压条件下的热导率进行了测量.实验结果表明,对于测试时间比较短的情况,对理想模型进行探头热容补偿及时间补偿能够较大幅度地提高热导率的测量准确度,并且与hot disk热物性分析仪的测量结果非常接近,探头四线电阻散热的影响是造成差距的主要原因. 展开更多
关键词 材料检测与分析 热导率 瞬态平面热源法 热物性 HOT disk
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二极管泵浦Yb:YAG Thin Disk激光器光束质量及V型腔腔内倍频的研究 被引量:11
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作者 单欣岩 魏晓羽 +1 位作者 吴念乐 李师群 《量子电子学报》 CAS CSCD 北大核心 2004年第5期587-591,共5页
Thin Disk激光器由于其独特的设计可以同时获得高转换效率和光束质量。对Yb:YAG Thin Disk激光器中泵浦光斑与腔模的耦合对光束质量的影响作了分析,并在普通直腔和V型腔的实验中分别获得M^2=1.15,13.69W和M^2=1.12,13.85W的1030nm激光输... Thin Disk激光器由于其独特的设计可以同时获得高转换效率和光束质量。对Yb:YAG Thin Disk激光器中泵浦光斑与腔模的耦合对光束质量的影响作了分析,并在普通直腔和V型腔的实验中分别获得M^2=1.15,13.69W和M^2=1.12,13.85W的1030nm激光输出,还在V型腔中进行了腔内倍频的实验研究。 展开更多
关键词 激光技术 YB:YAG晶体 THIN disk激光器 光束质量 腔内倍频
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Thermal analysis for brake disks of SiC/6061 Al alloy co-continuous composite for CRH3 during emergency braking considering airflow cooling 被引量:13
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作者 姜澜 姜艳丽 +2 位作者 喻亮 苏楠 丁友东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2783-2791,共9页
The mass of high-speed trains can be reduced using the brake disk prepared with SiC network ceramic frame reinforced 6061 aluminum alloy composite (SiCn/Al). The thermal and stress analyses of SiCn/Al brake disk dur... The mass of high-speed trains can be reduced using the brake disk prepared with SiC network ceramic frame reinforced 6061 aluminum alloy composite (SiCn/Al). The thermal and stress analyses of SiCn/Al brake disk during emergency braking at a speed of 300 km/h considering airflow cooling were investigated using finite element (FE) and computational fluid dynamics (CFD) methods. All three modes of heat transfer (conduction, convection and radiation) were analyzed along with the design features of the brake assembly and their interfaces. The results suggested that the higher convection coefficients achieved with airflow cooling will not only reduce the maximum temperature in the braking but also reduce the thermal gradients, since heat will be removed faster from hotter parts of the disk. Airflow cooling should be effective to reduce the risk of hot spot formation and disc thermal distortion. The highest temperature after emergency braking was 461 °C and 359 °C without and with considering airflow cooling, respectively. The equivalent stress could reach 269 MPa and 164 MPa without and with considering airflow cooling, respectively. However, the maximum surface stress may exceed the material yield strength during an emergency braking, which may cause a plastic damage accumulation in a brake disk without cooling. The simulation results are consistent with the experimental results well. 展开更多
关键词 finite element method brake disk co-continuous SiC/6061 composite thermal analysis airflow cool
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二极管泵浦Yb:YAG Thin Disk激光器获得16 W连续激光输出 被引量:15
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作者 李超 徐震 +4 位作者 李俊林 吴念乐 李师群 姚广涛 张绍光 《量子电子学报》 CAS CSCD 北大核心 2002年第2期104-108,共5页
近年来,Yb:YAG激光研究已被视为发展高效、高功率二极管泵浦固体激光器的一个主要方向.本文简要分析了 Yb YAG作为增益介质优于 Nd YAG的性质,阐述Thin Disk激光器的原理,并介绍了我们在国内首次获得 16... 近年来,Yb:YAG激光研究已被视为发展高效、高功率二极管泵浦固体激光器的一个主要方向.本文简要分析了 Yb YAG作为增益介质优于 Nd YAG的性质,阐述Thin Disk激光器的原理,并介绍了我们在国内首次获得 16 W连续激光(波长 1030 nm)输出的二极管泵浦 Yb:YAG Thin Disk激光器装置及数据. 展开更多
关键词 二极管泵浦固体激光器 DPSSL YB:YAG Thindisk激光器 增益介质
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Analysis of high-power disk laser welding stability based on classification of plume and spatter characteristics 被引量:6
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作者 高向东 文茜 Seiji KATAYAMA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第12期3748-3757,共10页
Classification of plume and spatter images was studied to evaluate the welding stability. A high-speed camera was used to capture the instantaneous images of plume and spatters during high power disk laser welding. Ch... Classification of plume and spatter images was studied to evaluate the welding stability. A high-speed camera was used to capture the instantaneous images of plume and spatters during high power disk laser welding. Characteristic parameters such as the area and number of spatters, the average grayscale of a spatter image, the entropy of a spatter grayscale image, the coordinate ratio of the plume centroid and the welding point, the polar coordinates of the plume centroid were defined and extracted. Karhunen-Loeve transform method was used to change the seven characteristics into three primary characteristics to reduce the dimensions. Also, K-nearest neighbor method was used to classify the plume and spatter images into two categories such as good and poor welding quality. The results show that plume and spatter have a close relationship with the welding stability, and two categories could be recognized effectively using K-nearest neighbor method based on Karhunen-Loeve transform. 展开更多
关键词 high-power disk laser welding PLUME SPATTER feature classification STABILITY
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基于Hot-disk的液体导热系数测量装置实验研究 被引量:4
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作者 王伟 陈奇良 +1 位作者 周孝清 赵凌君 《建筑节能》 CAS 2016年第5期84-87,108,共5页
基于Hot-disk热物性分析仪,开发了一种应用于液体导热系数测定的装置。应用该装置对液体进行导热系数测定时,可以较好地避免自然对流的影响,且制作简便,成本低廉。使用该装置对26℃的去离子水进行了5次测量,并分析了其测量结果。最大测... 基于Hot-disk热物性分析仪,开发了一种应用于液体导热系数测定的装置。应用该装置对液体进行导热系数测定时,可以较好地避免自然对流的影响,且制作简便,成本低廉。使用该装置对26℃的去离子水进行了5次测量,并分析了其测量结果。最大测量误差为8.5%,最小测量误差为2.05%,测量误差平均值为5.84%,5次测试的结果平均值为0.573 1 W/m·K,与文献标准值的偏差仅为3.72%。测试精确度较公式法取得很大进步,可以满足工程应用。 展开更多
关键词 Hot-disk 导热系数 液体 自然对流
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Analytical Solution for Laminar Viscous Flow inthe Gap Between Two Parallel Rotary Disks 被引量:2
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作者 刘淑艳 阎为革 《Journal of Beijing Institute of Technology》 EI CAS 1998年第2期113-119,共7页
Aim To get the analytical for laminar viscous flow in the gap of two parallel rotating disks. Methods By estimating the order of magnitude of each term in the Navier-Stokes equations to drop small terms and achieve... Aim To get the analytical for laminar viscous flow in the gap of two parallel rotating disks. Methods By estimating the order of magnitude of each term in the Navier-Stokes equations to drop small terms and achieve the required simplified differential equations, and by integrating the equations to obtain the solution for theflow between two rotary disks. Results Parameters related to the laminar viscous flow in the gap between two parallel rotary disks, such as the velocity, the pressure, the flowrate, the force, the shearing stress, the torque and the power derived. Conclusion The result provides a theoretical basis and an effective method for the designs of the devices connected with the laminar viscous flow in the gap between two parallel rotary disks. 展开更多
关键词 laminar viscous flow rotary disk GAP
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Hot disk探头热容对热导率测量的影响 被引量:2
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作者 王强 戴景民 何小瓦 《吉林大学学报(工学版)》 EI CAS CSCD 北大核心 2009年第S1期164-168,共5页
Hot disk探头热容的存在会直接影响热导率测量的准确度。为有效地评估这种影响的程度,在基于瞬态点热源格林函数法得到探头表面平均温升理想模型的基础上,提出了一种能够修正探头热容对实际加热功率影响的改进模型,并利用三种不同大小... Hot disk探头热容的存在会直接影响热导率测量的准确度。为有效地评估这种影响的程度,在基于瞬态点热源格林函数法得到探头表面平均温升理想模型的基础上,提出了一种能够修正探头热容对实际加热功率影响的改进模型,并利用三种不同大小及热容值的探头及Hot disk数据采集系统对Pyroceram 9606标准材料的热导率进行了测量。测量结果表明,Hot disk探头热容对热导率测量精度的影响会随探头半径、测量时间及加热功率等测量参数的不同而发生变化,对理想模型进行探头热容补偿可以有效提高热导率测量准确度,且探头热容相对实验总加热量的大小是影响热导率测量准确度的决定因素。 展开更多
关键词 材料检测与分析技术 热导率 瞬态平面热源法 热物性 Hotdisk
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The Studies of Some Key Technologies in Magnetic Disk Drives 被引量:1
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作者 Yang Yinpu and Zhu YaolongBeijing Institute of Data Processing Technology, P.O.Box 142-406, Beijing 100854, China 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1992年第4期29-36,共8页
This paper introduces some final results of some key technologies in magnetic disk drives. We dicuss the design and experiment of thin film head, magnetic fluid exclusion seal system, head disk interface and the engin... This paper introduces some final results of some key technologies in magnetic disk drives. We dicuss the design and experiment of thin film head, magnetic fluid exclusion seal system, head disk interface and the engineering appilcations of these technologies in magnetic disk drives. 展开更多
关键词 Thin film head disk Magnetic fluid SEAL Head disk interface.
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使用Broadcast Disks方法分布的空中位图索引
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作者 洪圆 孙未未 施伯乐 《计算机工程》 CAS CSCD 北大核心 2006年第2期53-55,共3页
提出一种使用BroadcastDisks算法来分布位图索引的空中索引方法,根据数据项访问概率,使用位图作为数据广播的索引,减少了移动终端等待数据时保持激活状态的时间,达到节能的目的。
关键词 BROADCAST diskS 位图索引 数据广播 访问概率 节能
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CRITICAL ISSUES OF POWDER METALLURGY TURBINE DISKS 被引量:1
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作者 K.M. Chang(Department of Mechanical and Aerospace Engineering,West Virginia University, P.O. Box 6160, Morgantown,WV 26506, USA 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1996年第6期467-471,共5页
P/M superalloy disks obtain their final strength by appropriate heat treatments; the maximum attainable strength depends on the rapid cooling rate from the solution annealing. A rapid quench of a large disk forging ca... P/M superalloy disks obtain their final strength by appropriate heat treatments; the maximum attainable strength depends on the rapid cooling rate from the solution annealing. A rapid quench of a large disk forging can cause two problems, surface cracking and shape distortion.In the past,many attempts employ the finite element code to model and to predict temperature evolution and induced stress distribution in a large turbine disk. The major difficulty was the correct description of alloy behavior; particularly the thermomechanical properties and the failure criteria of material during the cooling. High temperature fatigue resistance is always the key requirement for disk materials. New methodology of residual life management emphasizes the initiation as well as the propagation of the cracks developed under the service conditions. One of major challenges to P/M superalloys is the time-dependent behavior of fatigue cracking, which relates to the well-known SAGBO (stress-assisted grain boundary oxidation) phenomenon.A great effort has been done to understand the micro-mechanism of time-dependent fatigue crack propagation resulted in the second generation of P/M superalloys. Further improvement on temperature capability of disk alloys at rim area may lead to the idea of dual-property disks.Different grain structures at different portions of a large disk are possible,as the property requirements for different locations are different. This goal is achievable if the thermal history at specific disk locations can be controlled to develop desirable microstructures and properties.Some suggestions on the future direction of research efforts will be discused. 展开更多
关键词 superalloy disk powder metallurgy (P/M) quench cracking fatigue crack propagation SAGBO (stress-assisted grain boundary oxidation) dual-property disk grain size
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基于Linux平台下的Web Disk软件系统开发
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作者 张少平 余明珠 《江西农业大学学报》 CAS CSCD 2001年第5期44-46,共3页
主要论述了在Linux平台下整个Webdisk软件系统的开发方法。Webdisk系统是基于浏览器的管理 ,主要提供文件的网络存储服务。同时本系统还提供功能强大的用户管理服务和比较完善的系统管理服务 ,它们不仅为用户在使用本系统时提供方便 。
关键词 WEB disk Linux 网络磁盘 网络存储
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Dynamic Characteristics of Ultra Thin Liquid Lubricated Head-Disk Assembly in Magnetic Hard Disk Files
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作者 陈敏华 陈云飞 《Journal of Southeast University(English Edition)》 EI CAS 1998年第2期56-60,共5页
The dynamic characteristics of a liquid thin film lubricated head disk system are analyzed. The shear thinning effect is taken into account by introducing modification coefficients into the lubricant rheological mode... The dynamic characteristics of a liquid thin film lubricated head disk system are analyzed. The shear thinning effect is taken into account by introducing modification coefficients into the lubricant rheological model. The perturbation theory is employed to set up the dynamic pressure equation. The Reynolds equation and dynamic pressure equations are solved by finite difference method. The results obtained by the difference methods agree well with that calculated by the close solutions. IBM3370 slider is employed as a physical model. The slider of the system can keep flying at 20 nm height, which promises a potential application on high density recording device. 展开更多
关键词 thin film lubrication dynamic coefficients magnetic head disk system
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