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频域OCT图像的深度坐标标定 被引量:3
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作者 林凌 李刚 +1 位作者 张泰石 郑羽 《仪器仪表学报》 EI CAS CSCD 北大核心 2008年第3期466-471,共6页
为了对频域OCT图像深度坐标进行标定,本文提出了一种方法,并进行了实验验证。频域OCT图像深度坐标由宽带光源的特性与样品的不均匀折射率决定,因而坐标间隔不均。最大深度坐标(频域OCT的探测深度)由线阵CCD的像素总数和参考镜的虚像位... 为了对频域OCT图像深度坐标进行标定,本文提出了一种方法,并进行了实验验证。频域OCT图像深度坐标由宽带光源的特性与样品的不均匀折射率决定,因而坐标间隔不均。最大深度坐标(频域OCT的探测深度)由线阵CCD的像素总数和参考镜的虚像位置决定:线阵CCD的像素总数越多,最大深度坐标越大,但最终被光谱仪的分辨率所限制;参考镜的虚像位置设于样品以内时,最大深度坐标比参考镜的虚像位置设于样品以外时大一倍。该方法可以应用到实际频域OCT系统中。 展开更多
关键词 光学相干层析成像技术 迈克尔逊干涉仪 傅里叶周期 空间频率
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Analysis on the time variation and cycle of observed Argo profile data
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作者 张胜茂 伍玉梅 杨胜龙 《Marine Science Bulletin》 2012年第1期16-27,共12页
The remote sensing data which are used by marine fishery forecast only can get the information of ocean surface, while Argo data can provide fishery forecast with temperature and saltinity data of deeper area. To use ... The remote sensing data which are used by marine fishery forecast only can get the information of ocean surface, while Argo data can provide fishery forecast with temperature and saltinity data of deeper area. To use Argo data in cycle, we need to compute its circle to improve the quality of forecast. In 2001- 2008, the longer circle was 62.7 days and 117.5 days, and the shorter circle was 4.9 days and 9.8 days, which were obtained by power spectrum estimation. And there was an unobvious circle of 7 days. There existed big changes in observed profile data amount between years and within a year. 展开更多
关键词 ARGO CYCLE Power Spectrum Estimate Fourier transform
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Error Estimate of the Fourier Collocation Method for the Benjamin-Ono Equation
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作者 Zhenguo Deng Heping Ma 《Numerical Mathematics(Theory,Methods and Applications)》 SCIE 2009年第3期341-352,共12页
In this paper,the Fourier collocation method for solving the generalized Benjamin-Ono equation with periodic boundary conditions is analyzed.Stability of the semi-discrete scheme is proved and error estimate in H^(1/2... In this paper,the Fourier collocation method for solving the generalized Benjamin-Ono equation with periodic boundary conditions is analyzed.Stability of the semi-discrete scheme is proved and error estimate in H^(1/2)-norm is obtained. 展开更多
关键词 Fourier collocation Benjamin-Ono equation error estimate.
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