Search

Your search keyword '"Yu, Daoyin"' showing total 224 results
Start Over Author "Yu, Daoyin"
224 results on '"Yu, Daoyin"'

1. An all fiber source of frequency entangled photon pairs

Author

Li, Xiaoying, Yang, Lei, Ma, Xiaoxin, Cui, Liang, Ou, Zhe Yu, and Yu, Daoyin

Subjects
Quantum Physics
Abstract

We present an all fiber source of frequency entangled photon pairs by using four wave mixing in a Sagnac fiber loop. Special care is taken to suppress the impurity of the frequency entanglement by cooling the fiber and by matching the polarization modes of the photon pairs counter-propagating in the fiber loop. Coincidence detection of signal and idler photons, which are created in pair and in different spatial modes of the fiber loop, shows the quantum interference in the form of spatial beating, while the single counts of the individual signal (idler) photons keep constant. When the production rate of photon pairs is about 0.013 pairs/pulse, the envelope of the quantum interference reveals a visibility of $(95\pm 2)%$, which is close to the calculated theoretical limit 97.4%, Comment: 11 pages, 6 figures, to appear in Phys. Rev. A

Published
2009
Full Text
View/download PDF

2. Fiber based source of photon pairs at telecom band with high temporal coherence and brightness for quantum information processing

Author

Li, Xiaoying, Yang, Lei, Cui, Liang, Ou, Zhe Yu, and Yu, Daoyin

Subjects
Quantum Physics
Abstract

We experimentally demonstrate a bright pulsed source of correlated photon pairs at 1550 nm telecom band by pumping 300 m dispersion shifted fiber with a 4 ps pulse train. We investigate the coherence property of the source by measuring the second order intensity correlation function $g^{(2)}$ of individual signal (idler) photons. A preliminary Hong-Ou-Mandel type two-photon interference experiment with two such sources confirms the high temporal and spatial coherence of the source. The source is suitable for multi-photon quantum interference of independent sources, required in quantum information processing., Comment: 4 pages, 4 figures, submitted

Published
2008
Full Text
View/download PDF

6. New approach for enlargement of medical electronic endoscopic images

Author

Wang, Jianping, Xie, Shizhong, Li, Wei, and Yu, Daoyin

Subjects
Optics -- Research, Diagnostic imaging -- Methods, Endoscopes -- Usage, Astronomy, Physics
Abstract

To compensate for the imperfections of the endoscopic mechanical structure and the limitations of working space, a new technology based on the recursive minimum/maximum method is proposed to enlarge images obtained by the medical electronic endoscope. This method can be used repeatedly to obtain image enlargement to 2x by optimizing the neighborhood information of the pixels of interest in adjustable windows. In order to ensure the best evaluation of the pixel, the algorithm criterion is presented to decide whether the new gray value is assigned to the pixel. Experimental results from enlarged endoscopic images are presented that demonstrate that the recursive minimum/maximum method for image enlargement can preserve the fine details with rich edge information and with better visualization.

Published
2002

10. Sidelobe Canceller Algorithm for Ultrasonic Imaging

Author

汪毅 Wang Yi, 郁道银 Yu Daoyin, 陈晓冬 Chen Xiaodong, and 李嘉科 Li Jiake

Subjects
Computer science, Acoustics, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Ultrasonic imaging
Published
2019

14. Adaptive Window Local Matching Algorithm Based on HSV Color Space

Author

苏修 Su Xiu, 梁海涛 Liang Haitao, 郁道银 Yu Daoyin, 陈晓冬 Chen Xiaodong, 李伟锋 Li Weifeng, 汪毅 Wang Yi, 刘依林 Liu Yilin, and 徐怀远 Xu Huaiyuan

Subjects
Computer science, business.industry, Window (computing), Computer vision, HSL and HSV, Artificial intelligence, Electrical and Electronic Engineering, business, Atomic and Molecular Physics, and Optics, Local matching
Published
2018

15. Approximate Wavenumber Domain Algorithm for Interferometric Synthetic Aperture Microscopy

Author

陈晓冬 Chen Xiaodong, 雷湧 Lei Yong, 汪毅 Wang Yi, 李乔 Li Qiao, and 郁道银 Yu Daoyin

Subjects
Synthetic aperture radar, Physics, Interferometry, Optics, business.industry, Microscopy, Wavenumber, Electrical and Electronic Engineering, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Domain (software engineering)
Published
2010

16. Research on Synthetic Aperture Technique for Endoscopic Ultrasound Imaging

Author

汪毅 Wang Yi, 陈晓冬 Chen Xiaodong, 李妍 Li Yan, 李明 Li Ming, and 郁道银 Yu Daoyin

Subjects
Synthetic aperture radar, Endoscopic ultrasound, Materials science, medicine.diagnostic_test, medicine, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Biomedical engineering
Published
2010

17. A Digital Ultrasonic Endoscope System for Medical Imaging

Author

温世杰 Wen Shi-jie, 周浩 Zhou Hao, 陈晓冬 Chen Xiaodong, 郁道银 Yu Daoyin, and 李明 Li Ming

Subjects
Quality (physics), Optics, Transducer, Image quality, business.industry, Computer science, Medical imaging, Digital imaging, Ultrasonic sensor, business, Rotation, Signal, Atomic and Molecular Physics, and Optics
Abstract

The development of a novel push-type ultrasonic endoscope is described in which probe rotation is accomplished by a small motor situated near the transducer. A digital FPGA-based ultrasound imaging system is implemented which uses coded excitation to increase the SNR and penetration depth, with probe rotation accomplished by a small motor situated near the transducer replacing the external motor and the long steel wire used in other ultrasonic endoscopes. The apparatus is tested continuously for 300 hours with no obvious problems. The coded excitation, digital quadrature demodulation imaging system can obtain ultrasonic images of higher quality and more information of the echo is preserved compared with the analog imaging system, because the analog digital conversion is moved to the first step of the signal processing.The digital imaging system possesses a higher SNR resulting in a sharp image. Locating the motor near the probe improves the consistency of rotational speed in comparison with external guide-wire rotation, and increases the image quality and life-span of these devices.

Published
2010

18. Single-Detector Polarization-Sensitive Optical Coherence Tomography for Biological Tissue Imaging

Author

郁道银 Yu Daoyin, 汪毅 Wang Yi, 陈晓冬 Chen Xiaodong, 李海峰 Li Haifeng, and 李乔 Li Qiao

Subjects
Materials science, medicine.diagnostic_test, business.industry, Detector, Biological tissue, Atomic and Molecular Physics, and Optics, Diffuse optical imaging, Electronic, Optical and Magnetic Materials, Optics, Polarization sensitive, Optical coherence tomography, medicine, Electrical and Electronic Engineering, business, Computed tomography laser mammography, Preclinical imaging
Published
2009

19. Technology of Digital Endoscopic Ultrasonic Imaging

Author

李伟锋 Li Weifeng, 李明 Li Ming, 陈晓冬 Chen Xiaodong, 郁道银 Yu Daoyin, and 俞锋 Yu Feng

Subjects
Materials science, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Biomedical engineering, Ultrasonic imaging
Published
2009

29. Coronary Lesion Detection Method Based on One-Class Support Vector Machine

Author

赵聪 Zhao Cong, 陈向志 Chen Xiangzhi, 贾忠伟 Jia Zhongwei, 汪毅 Wang Yi, 张佳琛 Zhang Jiachen, 郁道银 Yu Daoyin, and 陈晓冬 Chen Xiaodong

Subjects
Support vector machine, Lesion detection, Computer science, business.industry, Pattern recognition, Artificial intelligence, Electrical and Electronic Engineering, business, Class (biology), Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2017

31. Fast Intra-Frame Encoding Algorithm Based on Image Texture Features for HEVC

Author

郁道银 Yu Daoyin, 汪 毅 Wang Yi, 孙学斌 Sun Xuebin, 肖禹泽 Xiao Yuze, and 陈晓冬 Chen Xiaodong

Subjects
Image texture, Computer science, business.industry, Encoding algorithm, Computer vision, Artificial intelligence, Electrical and Electronic Engineering, business, Intra-frame, Atomic and Molecular Physics, and Optics
Published
2017

38. Common-path OCT using optical delay stair

Author

Yi Wang, Yi Wang, primary, Xiaodong Chen, Xiaodong Chen, additional, Ji Leng, Ji Leng, additional, Ting Wang, Ting Wang, additional, Xiaojie Chen, Xiaojie Chen, additional, Junwei Li, Junwei Li, additional, and Daoyin Yu, Daoyin Yu, additional

Published
2015
Full Text
View/download PDF

42. A Coronary Artery Lumen Segmentation Algorithm Based on Ray Casting

Author

李俊威 Li Junwei, 陈晓冬 Chen Xiaodong, 贾忠伟 Jia Zhongwei, 陈向志 Chen Xiangzhi, 汪毅 Wang Yi, 赵聪 Zhao Cong, and 郁道银 Yu Daoyin

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2015

44. An Adaptive Surgical Navigation Method Based on Inertial Sensing

Author

杜承阳 Du Chengyang, 陈晓冬 Chen Xiaodong, 牛德森 Niu Desen, 汪毅 Wang Yi, and 郁道银 Yu Daoyin

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2015

Catalog

Books, media, physical & digital resources
See catalog results