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• 长春光学精密机械与物... [4]
• 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 [1]
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• OAI收割 [11]

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• 期刊论文 [6]
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• 2018 [2]
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浏览/检索结果: 共11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发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 An improvement to the transformation algorithm for the transient electromagnetic field 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2018, 卷号: 61, 期号: 12, 页码: 5077-5083 作者:  Xue JunJie;  Zhong HuaSen;  Li Hai;  Li Xiu;  Di QingYun   |  收藏  |  浏览/下载：52/0  |  提交时间：2019/03/04 Wave-field transformation  Singular value decomposition method  Truncated singular Value method  Modified truncated singular value method  Numerical calculation   An h-adaptive numerical manifold method for solid mechanics problems 期刊论文  OAI收割 SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2018, 卷号: 61, 期号: 6, 页码: 923-933 作者:  Yu ChangYi;  Liu Feng;  Xu Ying   |  收藏  |  浏览/下载：28/0  |  提交时间：2020/04/08 numerical manifold method (NMM)  adaptive analysis  quadtree meshes  mean value coordinates  cover refinement   长期定位条件下不同轮作系统的土壤肥力数值化综合评价 期刊论文  OAI收割 核农学报, 2013, 卷号: 27, 期号: 08, 页码: 1216-1226 张丽琼; 郝明德; 臧逸飞; 折凤霞 收藏  |  浏览/下载：69/0  |  提交时间：2014/10/21 轮作  Crop rotation  土壤肥力  Soil fertility  数值化  Numerical value  综合评价  Comprehensive evaluation   Reentry guidance based on parametric optimization (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China 作者:  Li D. 收藏  |  浏览/下载：168/0  |  提交时间：2013/03/25 This paper presents a parametric optimization approach to solve reentry guidance. Due to the various constraints imposed on the trajectory  original guidance problem can be converted into an optimal control problem with a merit function to be minimized. Direct implementation of method of variation and is too complex to get a reasonable result  while a numerical parametric optimization approach is feasible and efficient if we choose appropriate control variables as the optimization parameters and effective optimization algorithm. A simulation of the approach is performed to show its validity on reentry guidance problem: as the value of merit function converges to acceptable threshold  all constraints are hold. (2013) Trans Tech Publications  Switzerland.   Extrapolation methods to compute hypersingular integral in boundary element methods 期刊论文  OAI收割 SCIENCE CHINA-MATHEMATICS, 2013, 卷号: 56, 期号: 8, 页码: 1647-1660 作者:  Li Jin;  Zhang XiaoPing;  Yu DeHao   |  收藏  |  浏览/下载：32/0  |  提交时间：2021/01/14 CAUCHY PRINCIPAL VALUE  FINITE-PART INTEGRALS  GAUSSIAN QUADRATURE  SINGULAR-INTEGRALS  NUMERICAL-SOLUTION  EQUATIONS  SUPERCONVERGENCE  CIRCLE  hypersingular integrals  trapezoidal rule  asymptotic error expansion  extrapolation algorithm   STUDY AND APPLICATION OF SEISMIC ATTENUATION BASED ON THE ONE-WAY WAVE EQUATION 期刊论文  OAI收割 JOURNAL OF SEISMIC EXPLORATION, 2011, 卷号: 20, 期号: 1, 页码: 45-55 作者:  Bai, Xiaoyin;  Liang, Kai;  Chen, Yongbo;  He, Binghong   |  收藏  |  浏览/下载：20/0  |  提交时间：2018/09/26 one-way wave numerical simulation  seismic wave attenuation  Q value  reservoir prediction   Structure buckling load interval analysis of supercavitating projectile (EI CONFERENCE) 会议论文  OAI收割 2011 9th International Conference on Reliability, Maintainability and Safety: Safety First, Reliability Primary, ICRMS'2011, June 12, 2011 - June 15, 2011, Guiyang, China 作者:  Zhou L. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 As a result of supercavitating projectiles with high underwater velocity  their structures undergo high longitudinal force. It is necessary to perform structure buckling load interval analysis because the uncertainty of structural own parameters should be considered. Critical buckling load of supercavitating projectiles is calculated by Galerkin method. The partial matrixes of critical buckling load implicit function to each uncertainty variable are deduced  and the interval of structure critical buckling load is calculated by interval analysis and convex model methods. Numerical results show that the nominal value  lower and upper bounds of critical buckling load increase with the increment of the ratio of base diameter to cavitator diameter. And the uncertainty degree of basic variables should be controlled as far as possible in the project for high reliability. 2011 IEEE.   MTF-based research on the minimum fill factor in optical sparse aperture system (EI CONFERENCE) 会议论文  OAI收割 2011 4th International Conference on Intelligent Computation Technology and Automation, ICICTA 2011, March 28, 2011 - March 29, 2011, Shenzhen, Guangdong, China 作者:  Liu Z. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 To avoid the loss of image information when it is transferred through optical sparse aperture system with excessively diluted apertures arrangement  we propose a method in the frequency domain termed characteristic triangle to calculate the minimum fill factor. This method is based on the characteristics of MTF and demonstrates that when the characteristic triangle is equilateral with each side 3th power of sub-MTF cutoff frequency  MTF has no zero value below cutoff frequency  thus we can obtain the minimum fill factor. Furthermore  we apply it to some typical sparse arrays  such as Golay3  Golay6  Ring6 and Tri-arm7  and get their fill factors of 33.33%  15.16%  30.11%  and 11.14% correspondingly  which are consistent with numerical results. 2011 IEEE.   Application and comparison of resolving methods in SAR image ortho-rectification based on G.Konecny model 会议论文  OAI收割 MIPPR 2007: Multispectral Image Processing, Wuhan, China, November 15, 2007 - November 17,2007 Yang, Bo; Wang, Chao; Zhang, Hong; Zhang, Bo 收藏  |  浏览/下载：16/0  |  提交时间：2014/12/07 Radar imaging  Convergence of numerical methods  Image analysis  Iterative methods  Mathematical models  Singular value decomposition  Synthetic aperture radar   Dispersion compensating properties of microstructure fiber (EI CONFERENCE) 会议论文  OAI收割 ICO20: Optical Communication, August 21, 2005 - August 26, 2005, Changshun, China 作者:  Li C.;  Wang W.;  Wang W.;  Li C.;  Li C. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 Microstructure fiber is a new kind of optical fiber. An arrangement of air holes running along the full length of the fiber provides the confinement and guidance of light. The light is confined in the silica core along the fiber axis. This fiber has endlessly single mode  special dispersion characteristics and so on. Using a vectorial effective-index numerical method  we investigated the dispersion characteristics of a microstructure fiber with honeycomb cladding structures. The dispersion  dispersion slope  and Kappa parameter can be designed neatly by changing the air hole size and the separation of the holes in fiber cladding. We demonstrated the Microstructure fiber with large absolute value of normal dispersion and negative dispersion slope at the wavelength of 1550nm. Conventional communication non-shifted single-mode fibers and nonzero-dispersion shifted fibers (NZ-DSF) can be compensated efficiently using the microstructure fiber at the wavelength around 1550nm.