中国科学院机构知识库网格系统: 检索

Study on Spectrum Shifting and Pulse Splitting of Mode-Locked Fiber Lasers Based on NPR Technology 期刊论文 OAI收割
NANOMATERIALS, 2024, 卷号: 14, 期号: 9
作者: Hao, Zhenhua; Hu, Yu; Zhou, Siyu; Liu, Jinhui; Li, Xiaohui

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收藏 | 浏览/下载：10/0 | 提交时间：2024/08/22

mode-locked laser nonlinear polarization rotation spectrum shift multi-pulse

地球自转参数预报误差对天文测量影响的分析 期刊论文 OAI收割
测绘通报, 2023, 期号: 8, 页码: 102
作者: 魏飞; 高玉平; 尹东山

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收藏 | 浏览/下载：13/0 | 提交时间：2023/12/13

astronomical measurements earth rotation parameters forecast error pole shift UT1-UTC 天文测量地球自转参数预报误差极移 UT1-UTC

Photonics generation of frequency-shift keying radio-frequency signal using nonlinear polarization rotation in a highly nonlinear fiber 期刊论文 OAI收割
optical engineering, 2016, 卷号: 55, 期号: 10
作者: Wang, Xin; Li, Wei; Li, Ming; Zhu, Ning Hua

收藏 | 浏览/下载：27/0 | 提交时间：2016/12/16

radio-frequency frequency-shift keying nonlinear polarization rotation amplitude-shift keying

Absolute interferometric shift-rotation method with pixel-level spatial frequency resolution 期刊论文 OAI收割
OPTICS AND LASERS IN ENGINEERING, 2014, 卷号: 54, 页码: 68-72
作者: Song, Weihong; Hou, Xi; Wu, Fan; Wan, Yongjian

收藏 | 浏览/下载：30/0 | 提交时间：2015/07/10

Interferometry Absolute testing Shift-rotation Surface measurements

Absolute calibration for Fizeau interferometer with the global optimized shift-rotation method 期刊论文 OAI收割
OPTICS AND LASERS IN ENGINEERING, 2014, 卷号: 54, 页码: 49-54
作者: Song, Weihong; Li, Shifang; Hou, Xi; Wu, Fan; Zhao, Wenchuan

收藏 | 浏览/下载：24/0 | 提交时间：2015/07/10

Interferometry Absolute measurement Surface measurements Shift-rotation

Estimation of optical chemical shift in nuclear spin optical rotation 期刊论文 OAI收割
chemical physics, 2014, 期号: 435, 页码: 57-61
作者: Fang Chen; Guo-hua Yao; Tian-jing He; Dong-ming Chen; Fan-chen Liu

收藏 | 浏览/下载：18/0 | 提交时间：2015/12/28

Optical detection of NMR Chemical shift Faraday rotation effect Antisymmetric polarizability Hyperfine interaction

Absolute measurement of flats with the method of shift-rotation 期刊论文 OAI收割
OPTICAL REVIEW, 2013, 卷号: 20, 期号: 5, 页码: 374-377
作者: Song, Weihong; Wu, Fan; Hou, Xi; Zhao, Wenchuan; Wan, Yongjian

收藏 | 浏览/下载：19/0 | 提交时间：2015/04/17

absolute measurement shift-rotation interferometry surface measurements

Absolute calibration of a spherical reference surface for a Fizeau interferometer with the shift-rotation method of iterative algorithm 期刊论文 OAI收割
OPTICAL ENGINEERING, 2013, 卷号: 52, 期号: 3
作者: Song, Weihong; Wu, Fan; Hou, Xi; Wu, Gaofeng; Liu, Bin

收藏 | 浏览/下载：23/0 | 提交时间：2015/04/17

interferometry surface metrology absolute measurement shift rotation

Mean shift tracking combining SIFT (EI CONFERENCE) 会议论文 OAI收割
2008 9th International Conference on Signal Processing, ICSP 2008, October 26, 2008 - October 29, 2008, Beijing, China
作者: Xue C.

收藏 | 浏览/下载：66/0 | 提交时间：2013/03/25

A novel visual tracking algorithm to cope with occlusion and scale variation is proposed. This method combines mean shift and SIFT algorithm to track object. SIFT algorithm is invariant to rotation translation and scale variation. But it is a timeconsuming algorithm. The wasting time is related to image size. So the proposed algorithm first adopts mean shift to initially locate object position then SIFT operator is used to detect features in object area and model area lastly the proposed method matches features in these two areas and calculates the relationship between them using affine transform. According to affine transform parameters the state of object can be adjusted in time. In order to reduce process time an improved feature matching algorithm is proposed in this paper. Experiments show that the proposed algorithm deals with occlusion successfully and can adjust object size in time. 2008 IEEE.

Integrated intensity, orientation code and spatial information for robust tracking (EI CONFERENCE) 会议论文 OAI收割
2007 2nd IEEE Conference on Industrial Electronics and Applications, ICIEA 2007, May 23, 2007 - May 25, 2007, Harbin, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

real-time tracking is an important topic in computer vision. Conventional single cue algorithms typically fail outside limited tracking conditions. Integration of multimodal visual cues with complementary failure modes allows tracking to continue despite losing individual cues. In this paper we combine intensity orientation codes and special information to form a new intensity-orientation codes-special (IOS) feature to represent the target. The intensity feature is not affected by the shape variance of object and has good stability. Orientation codes matching is robust for searching object in cluttered environments even in the cases of illumination fluctuations resulting from shadowing or highlighting etc The spatial locations of the pixels are used which allow us to take into account the spatial information which is lost in traditional histogram. Histograms of intensity orientation codes and spatial information are employed for represent the target Mean shift algorithm is a nonparametric density estimation method. The fast and optimal mode matching can be achieved by this method. In order to reduce the compute time we use the mean shift procedure to reach the target localization. Experiment results show that the new method can successfully cope with clutter partial occlusions illumination change and target variations such as scale and rotation. The computational complexity is very low. If the size of the target is 3628 pixels it only needs 12ms to complete the method. 2007 IEEE.