机构

• 长春光学精密机械与物... [6]
• 高能物理研究所 [3]
• 工程热物理研究所 [3]
• 地质与地球物理研究所 [2]
• 数学与系统科学研究院 [2]
• 遥感与数字地球研究所 [2]
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采集方式

• OAI收割 [21]

内容类型

• 期刊论文 [13]
• 会议论文 [8]

发表日期

• 2022 [1]
• 2015 [1]
• 2014 [1]
• 2011 [2]
• 2010 [2]
• 2009 [5]
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学科主题

• Physics [1]
• 非线性偏微分方程 [1]

筛选

浏览/检索结果: 共21条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Supersingular j-invariants and the class number of Q(root-p) 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF NUMBER THEORY, 2022, 卷号: 18, 期号: 05, 页码: 1065-1078 作者:  Xiao, Guanju;  Luo, Lixia;  Deng, Yingpu   |  收藏  |  浏览/下载：21/0  |  提交时间：2023/02/07 Supersingular j-invariants  class polynomials  class number  imaginary quadratic order   8-rank of the class group and isotropy index 期刊论文  OAI收割 SCIENCE CHINA-MATHEMATICS, 2015, 卷号: 58, 期号: 7, 页码: 1433-1444 作者:  Lu Qing   |  收藏  |  浏览/下载：13/0  |  提交时间：2018/07/30 imaginary quadratic field  class group  8-rank  isotropy index  Redei matrix   A New Simplified Zonal Method for Furnace Thermal Radiation Calculation Based on Imaginary Planes 期刊论文  OAI收割 JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL, 2014, 卷号: 21, 期号: 4, 页码: 419-426 作者:  Zhang Weijun;  Yi Zhi;  Chen Haigeng   |  收藏  |  浏览/下载：19/0  |  提交时间：2021/02/26 imaginary plane  zonal method  crown wall reduction  total radiative exchange area   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：48/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.   Local variance based color image quality assessment method (EI CONFERENCE) 会议论文  OAI收割 2011 2nd International Conference on Advanced Measurement and Test, AMT 2011, June 24, 2011 - June 26, 2011, Nanchang, China 作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 In this paper  local variance is used to describe the structural information of a color image in order to assess its quality. The representation method is different from conventional models in that some information that is sensitive to human eyes is enhanced by using local variance distribution. It encodes the local variance distribution of different channels of a color image into the three imaginary parts of a quaternion. The distance between the singular value feature vectors of the source image block and the distorted image block which are described by quaternion matrices is calculated. The experimental results show that the assessment results of the proposed assessment method are more consistent with the Human Visual System than those of the conventional assessment methods.   Error Bounds for Uniform Asymptotic Expansions-Modified Bessel Function of Purely Imaginary Order 期刊论文  OAI收割 CHINESE ANNALS OF MATHEMATICS SERIES B, 2010, 卷号: 31, 期号: 5, 页码: 759-780 作者:  Shi, Wei;  Wong, Roderick 收藏  |  浏览/下载：23/0  |  提交时间：2015/06/25 Modified Bessel function of purely imaginary order  Airy function  Uniform asymptotic expansion  Error bound   Quaternion based assessment method for color image fusion algorithms (EI CONFERENCE) 会议论文  OAI收割 2010 3rd International Congress on Image and Signal Processing, CISP 2010, October 16, 2010 - October 18, 2010, Yantai, China 作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 A new approach to assess the performance of color image fusion algorithms is proposed. The color information is fully used by this method. Quaternions are used to encode the pixels in a color image into a quaternion matrix. Local variance of the luminance layer of the color image is taken as the real part of a quaternion  then the three RGB channels of the color image are encoded into the three imaginary parts of a quaternion. The angle between the singular value feature vectors of the quaternion matrices corresponding to one of the source image and the fused image is used to measure their structural similarity. Edge information transferring is used to balance the sensitivity of the assessment methods. Experimental results show that the proposed assessment method is better consistent with the HVS than some of the state-of-the-art method. Accurate assessment results can be given by the proposed method for various of color image fusion algorithms by using the source images and the fused image. 2010 IEEE.   Incorporating imaginary faults in graphical stress methods 期刊论文  OAI收割 JOURNAL OF STRUCTURAL GEOLOGY, 2009, 卷号: 31, 期号: 4, 页码: 366-368 作者:  Shan, Yehua;  Tian, Ye;  Xiao, Wenjiao   |  收藏  |  浏览/下载：24/0  |  提交时间：2018/09/26 The right dihedra method  The right trihedra method  Imaginary fault  Principal stress directions  Graphic determination   Incorporating imaginary faults in graphical stress methods 期刊论文  OAI收割 JOURNAL OF STRUCTURAL GEOLOGY, 2009, 卷号: 31, 期号: 4, 页码: 366-368 作者:  Shan, Yehua;  Tian, Ye;  Xiao, Wenjiao   |  收藏  |  浏览/下载：21/0  |  提交时间：2018/09/26 The right dihedra method  The right trihedra method  Imaginary fault  Principal stress directions  Graphic determination   First attempt to overcome the disaster of Dirac sea in imaginary time step method 期刊论文  OAI收割 CHINESE PHYSICS C, 2009, 卷号: 33, 页码: 113-115 作者:  Zhang Ying;  Liang Hao-Zhao;  Meng Jie   |  收藏  |  浏览/下载：27/0  |  提交时间：2018/05/31 imaginary time step method  Dirac equation  Woods-Saxon potential  axially deformed  coordinate space