中国科学院机构知识库网格系统: 检索

Structural design of large aperture rectangular mirror for space telescope (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Civil Engineering and Transportation, ICCET 2012, October 27, 2012 - October 28, 2012, Guilin, China
作者: Li Z.; Li Z.

收藏 | 浏览/下载：43/0 | 提交时间：2013/03/25

Structural design of large aperture mirror is one of the key technologies for space telescope development. To meet the requirements of high stiffness strength and thermal dimensional stability some factors such as support scheme materials selection lightweight design and flexible support design were taken into account. The three supports location of the mirror was determined according to the modal analytical solution. By adjusting the parameters of flexure hinge influences of gravity assembly stress and thermal stress on the mirror were reduced obviously. Finite element analysis (FEA) results indicate that the surface accuracy reach to rms10.2nm and 10.8nm under the gravity along optical axis direction and 5C uniform temperature rise respectively the fundamental frequency of the mirror component is 268Hz. Dynamics test shows that the first order natural frequency is 256Hz which shows an error less than 5% compared to FEA results. (2013) Trans Tech Publications Switzerland.

Spatially-explicit sensitivity analysis for land suitability evaluation 期刊论文 OAI收割
APPLIED GEOGRAPHY, 2013, 卷号: 45, 页码: 1-9
作者: Zhang, Hongqi

收藏 | 浏览/下载：18/0 | 提交时间：2014/09/05

Land suitability evaluation Multi-criteria decision-making One-dimensional sensitivity Spatially explicit analysis Earth mover's distance

Spatially-explicit sensitivity analysis for land suitability evaluation SCI/SSCI论文 OAI收割
2013
Xu E. Q.; Zhang H. Q.

收藏 | 浏览/下载：36/0 | 提交时间：2014/12/24

Land suitability evaluation Multi-criteria decision-making One-dimensional sensitivity Spatially explicit analysis Earth mover's distance uncertainty analysis decision-making gis multicriteria management model visualization framework distance impact

Characteristic point match algorithm based on the SURF in binocular stereo vision (EI CONFERENCE) 会议论文 OAI收割
5th International Conference on Intelligent Networks and Intelligent Systems, ICINIS 2012, November 1, 2012 - November 3, 2012, Tianjin, China
作者: Wang L.; Wang L.; Wang L.; Yang L.; Yang L.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

One of the main components of the computer vision is 3D reconstruction. Extracts and the match based on two-dimensional picture characteristic point is the 3D reconstruction technology core. Taking binocular stereoscopic vision theory as a foundation through extracts the characteristics of SURF based on the multi-scale analysis this feature has specific scale reproducibility put the epipolar constraints and disparity constraints as conditions judgement to specific screening it is greatly reduced the search range. The experiment use the matching method for three different actual scenes the results shows that the method can enhance the image matching speed and precision and can get more precise dense parallax used for reconstruction complete scene. 2012 IEEE.

Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Wu J.

收藏 | 浏览/下载：41/0 | 提交时间：2013/03/25

This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.

Image compression based on contourlet and no lists SPIHT (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Zhang S.

收藏 | 浏览/下载：46/0 | 提交时间：2013/03/25

The volume of raw image data captured by the high resolution camera is extremely huge. Thus the efficient image compression method should be used to decrease the bit rate. The image compression method based on wavelet is used more widely nowadays. However two dimensional wavelet is only the tensor product of the one dimensional wavelet whose support region of basis function is extended from interval to square. Contourlet is an image multiscale geometric analysis tool which could represent image sparsely and has strong capability of nonlinear approximation. The basis function of contourlet is multidirectional and anisotropic. Nevertheless contourlet is redundant. So the non-redundant Wavelet Based Contourlet Transform (WBCT) is used in this paper. The SPIHT algorithm is very efficient way to coding the significant coefficients. And the improved no lists SPIHT is more easy to implemented by hardware. Image compression method based on the combination of both wavelet based contourlet transform and no lists SPIHT coding is proposed in the paper. Experiment shows that compared to wavelet based scheme the contourlet scheme can reserve the texture of the image. For barbara test image when coding at low bit rate the PSNR can improve about 0.2dB. 2010 IEEE.

One-Dimensional Analysis of Supersonic Two-Stage HVOF Process 期刊论文 OAI收割
JOURNAL OF THERMAL SCIENCE, 2009, 卷号: 18, 期号: 4, 页码: 332,337
Hiroshi KATANODA1; Junichi HAGI1; Minoru FUKUHARA1

收藏 | 浏览/下载：20/0 | 提交时间：2013/01/09

Compressible Flow Supersonic Flow Two-Stage HVOF Thermal Spray One-Dimensional Analysis UHMWPE

One-Dimensional Analysis of Supersonic Two-Stage HVOF Process 期刊论文 OAI收割
JOURNAL OF THERMAL SCIENCE, 2009, 卷号: 18, 期号: 4, 页码: 332,337
作者: Hiroshi KATANODA1; Junichi HAGI1; Minoru FUKUHARA1

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收藏 | 浏览/下载：23/0 | 提交时间：2013/01/09

Compressible Flow Supersonic Flow Two-stage Hvof Thermal Spray One-dimensional Analysis Uhmwpe

Advances in chromatographic techniques and methods in shotgun proteome analysis 期刊论文 OAI收割
trac-trends in analytical chemistry, 2007, 卷号: 26, 期号: 1, 页码: 80-84
作者: Ye, Mingliang; Jiang, Xiaogang; Feng, Shun; Tian, Ruijun; Zou, Hanfa

收藏 | 浏览/下载：20/0 | 提交时间：2010/11/30

automated proteome-analysis system multidimensional separation one-dimensional separation separation technique shotgun proteomics

Study on color difference estimation method of medicine biochemical analysis (EI CONFERENCE) 会议论文 OAI收割
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者: Zhou Y.; Zhou F.; Wang C.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

The biochemical analysis in medicine is an important inspection and diagnosis method in hospital clinic. The biochemical analysis of urine is one important item. The Urine test paper shows corresponding color with different detection project or different illness degree. The color difference between the standard threshold and the test paper color of urine can be used to judge the illness degree therefore it can be used in hospital so that further analysis and diagnosis to urine is gotten. The color is a three-dimensional physical variable concerning psychology the estimation method of color difference in urine test can have better precision and facility than the conventional test method with one-dimensional reflectance calibrating organization and family while reflectance is one-dimensional variable it can make an accurate diagnose. The digital camera is easy to take an image of urine test paper and is used to carry out the urine biochemical analysis conveniently. On the experiment so its application prospect is extensive. the color image of urine test paper is taken by popular color digital camera and saved in the computer which installs a simple color space conversion (RGB &rarr XYZ &rarr L*a*b*) and the calculation software. Test sample is graded according to intelligent detection of quantitative color. The images taken every time were saved in computer and the whole illness process will be monitored. This method can also use in other medicine biochemical analyses that have relation with color. Experiment result shows that this test method is quick and accurate