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Wen-Kai Yu

Name: Wen-Kai Yu
Department: School of Physics, Beijing Institute of Technology
Title: Lecturer
Phone: 15652918248
E-mail: yuwenkai@bit.edu.cn
Address: 221 Central Building, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China
 
Resume
September 2010 - July 2015
Doctor of Engineering degree in Computer Applied Technology
University of Chinese Academy of Sciences
Key Laboratory of Electronics and Information Technology for Space System
National Space Science Center (Center for Space Science and Applied Research), Chinese Academy of Sciences Beijing, China
 
Awards:
1. Pacemaker to Merit Student of University of Chinese Academy of Sciences, 2012-2013
2. Pacemaker to Merit Student of University of Chinese Academy of Sciences, 2013-2014
3. Excellence Price of President Scholarship of Chinese Academy of Sciences for Postgraduate Students, 2014
4. National Scholarship of Ministry of Education of the People's Republic of China for Postgraduate Students, 2014
5. Excellence Price of President Scholarship of Chinese Academy of Sciences for Postgraduate Students, 2015
6. Excellent Graduate Student of University of Chinese Academy of Sciences, 2014-2015
7. Excellent Graduate Student of Beijing Regular Institution of Higher Education, 2015
 
Work Experience
July 2015 - Now: Work in School of Physics, Beijing Institute of Technology.
Member of the First Committee of Chinese Society for Optical Engineering
 
Research Interests
Compressed Sensing, Ultra-weak Light Imaging, Single-photon Detection, Image Formation, Optical Imaging, Time-resolved Spectral Imaging, Biomedical Imaging, 3D-Imaging, Ghost Imaging, Astronomical Observation, Computer Vision, Image Processing, Image Reconstruction, Super-resolution, Optimization Algorithm, Computer Application, Secure Optical Communication.
 
Academic Achievement
Principle Exploration:
1) We combine the single-pixel imaging technology with the single-photon detection technique, promoting classic single-pixel cameras to a nonclassical single-photon level. This novel imaging system inherits the advantages of the decrease of the sampling dimensions, the number of measurement, detecting channels and the increase of optical flux. Moreover, it is equivalent to acquiring a 1024×768 single-photon array sensor.
2) Both theoretical analysis and experiments have verified that this method, called super-sensitivity single-photon counting imaging, makes full use of high-flux measurement to obtain a systematic imaging sensitivity which exceeds the sensitivity limit of the detection device itself (i.e., ultrasensitivity called by us), even more than two orders of magnitude.
3) For spectral imaging, it is obviously impossible to obtain three-dimensional information simultaneously with current detectors with two-dimensional resolution. The detection of spatial image or spectrum should be performed by scanning, which will lead to mechanical movement and reduce the stability of imaging. As an alternative approach, with the method of dual compressed sensing (CS) we derive, the spectral image of a multi-wavelength object can be obtained with only a single point detector instead of conventional linear array detectors, and sub-sampling is achieved in both spatial and spectral domains.
4) In view of that computational ghost imaging has the same measurement model with compressive single-pixel imaging, we have firstly proposed a statistical mathematical explanation of the formation of the positive/negative image phenomenon in ghost imaging.
 
Technology Research:
1) We analyze the source of the noise, and investigate the influence of matrices whose entries are either 0 or 1 and the photon noise on the imaging quality. It is found that 0-1 measurement matrices on the DMD cannot achieve good performance with respect to the restricted isometry property which is the prerequisite of the CS theory. To solve this problem, a complementary double-pixel sampling approach and a protocol based on DMD complementary modulation are proposed, realizing positive-negative light intensity modulation, making the measurement matrices meet the condition, and improving the image quality by 1∼2 orders of magnitude. These two methods have been successfully used in the fields of 5 km telescopic imaging, microscopic imaging, three-dimensional reflectivity imaging and moving target tracking, gas absorption/emission imaging.
2) To solve the problems of the memory storage and the computational complexity during the reconstruction for large images, an adaptive compressive imaging method based on wavelet trees and sparse representation has been experimentally demonstrated and has less hardware requirements. In order to scientifically evaluate the performance of algorithms, an evaluation system based on the receiver operating characteristic analysis was proposed.
 
Reviewer of academic journals including Optics Express, Biomedical Optics Express, Optics Letters, Applied Optics, Optics and Laser Technology, Journal of the Optical Society of America A, Optics Communications, Acta Physica Sinica etc.
 
Representative papers:
1. Wen-Kai Yu, Xu-Ri Yao, Xue-Feng Liu, Long-Zhen Li, and Guang-Jie Zhai. Applied Optics, 54(13), 4249--4254 (2015).
2. Wen-Kai Yu, Xu-Ri Yao, Xue-Feng Liu, Long-Zhen Li, and Guang-Jie Zhai. Applied Optics, 54(3), 363--367 (2015).
3. Wen-Kai Yu, Xu-Ri Yao, Xue-Feng Liu, Long-Zhen Li, and Guang-Jie Zhai. Chinese Physics B, 24(5), 054203 (2015).
4. Wen-Kai Yu, Xu-Ri Yao, Xue-Feng Liu, Long-Zhen Li, and Guang-Jie Zhai. Journal of the Optical Society of America A, 32(6), 1084--1091 (2015).
5. Wen-Kai Yu, Xue-Feng Liu, Xu-Ri Yao, Chao Wang, Yun Zhai, and Guang-Jie Zhai. Scientific Reports, 4, 5834 (2014).
6. Wen-Kai Yu, Ming-Fei Li, Xu-Ri Yao, Xue-Feng Liu, Ling-An Wu, and Guang-Jie Zhai. Optics Express, 22(6), 7133--7144 (2014).
7. Wen-Kai Yu, Xue-Feng Liu, Xu-Ri Yao, Chao Wang, Guang-Jie Zhai, and Qing Zhao. Physics Letters A, 378, 3406--3411 (2014).
8. Wen-Kai Yu, Shen Li, Xu-Ri Yao, Xue-Feng Liu, Ling-An Wu, and Guang-Jie Zhai. Applied Optics, 52(33), 7882--7888 (2013).
9. Wen-Kai Yu, Xu-Ri Yao, Xue-Feng Liu, Guang-Jie Zhai, and Qing Zhao. Optics and Precision Engineering, 20(10), 2283--2292 (2012).
10. Xu-Ri Yao, Xue-Feng Liu, Wen-Kai Yu, and Guang-Jie Zhai. Chinese Optics Letters, 13(01), 010301 (2015).
11. Xu-Ri Yao, Long-Zhen Li, Xue-Feng Liu, Wen-Kai Yu, and Guang-Jie Zhai. Chinese Physics B, 24(4), 044203 (2015).
12. Chao Wang, Xue-Feng Liu, Wen-Kai Yu, Xu-Ri Yao, Long-Zhen Li, Qing Zhao, and Guang-Jie Zhai. Optics Communications, 352, 45--48 (2015).
13. Xu-Ri Yao, Wen-Kai Yu, Xue-Feng Liu, Long-Zhen Li, and Guang-Jie Zhai. Optics Express, 22(20), 24268--24275 (2014).
14. Xue-Feng Liu, Xi-Hao Chen, Xu-Ri Yao, Wen-Kai Yu, Guang-Jie Zhai, and Ling-An Wu. Optics Letters, 39(8), 2314--2317 (2014).
15. Long-Zhen Li, Xu-Ri Yao, Xue-Feng Liu, Wen-Kai Yu, and Guang-Jie Zhai. Acta Phys. Sin., 63(22), 224201 (2014).
16. Shen Li, Xu-Ri Yao, Wen-Kai Yu, Ling-An Wu, and Guang-Jie Zhai. Optics Letters, 38(12), 2144--2146 (2013).
17. Xue-Feng Liu, Ming-Fei Li, Xu-Ri Yao, Wen-Kai Yu, Guang-Jie Zhai, and Ling-An Wu. AIP Advances, 3, 052121 (2013).
18. Xue-Feng Liu, Xu-Ri Yao, Ming-Fei Li, Wen-Kai Yu, Xi-Hao Chen, Zhi-Bin Sun, Ling-An Wu, and Guang-Jie Zhai. Acta Phys. Sin., 62(18), 184205 (2013).
 
Representative Patents:
1. Wen-Kai Yu, Guang-Jie Zhai, and Chao Wang. Chinese invention patent, 201110328462.2 Authorized on July 9, 2014.
2. Wen-Kai Yu, Guang-Jie Zhai, and Chao Wang. Chinese invention patent, 201110328748.0 Authorized on September 11, 2013.
3. Guang-Jie Zhai, Ke-Ming Du, Chao Wang, and Wen-Kai Yu. International invention patent, PCT/CN2012/074533. US008723130B2 Authorized on May 13, 2014.
4. Guang-Jie Zhai, Ke-Ming Du, Chao Wang, and Wen-Kai Yu. International invention patent, PCT/CN2012/074536.
5. Guang-Jie Zhai, Wen-Kai Yu, Xue-Feng Liu, Xu-Ri Yao, Chao Wang, and Zhi-Bin Sun. International invention patent, PCT/CN2012/075444.
6. Guang-Jie Zhai, Chao Wang, Qing Zhao, Wen-Kai Yu, and Xue-Feng Liu. Chinese invention patent, 201210265434.5 Authorized on November 12, 2014.
7. Guang-Jie Zhai, Chao Wang, Qing Zhao, Wen-Kai Yu, and Xue-Feng Liu. Chinese invention patent, 201210265370.9 Authorized on September 3, 2014.
8. Guang-Jie Zhai, Chao Wang, Qing Zhao, Wen-Kai Yu, and Xue-Feng Liu. Chinese invention patent, 201210265250.9 Authorized on May 6, 2015.
9. Guang-Jie Zhai, Chao Wang, Qing Zhao, Wen-Kai Yu, and Xue-Feng Liu. Chinese invention patent, 201210265276.3 Authorized on September 3, 2014.
10. Guang-Jie Zhai, Wen-Kai Yu, and Chao Wang. Chinese invention patent, 201310027659.1 Authorized on November 12, 2014.
11. Guang-Jie Zhai, Wen-Kai Yu, and Chao Wang. Chinese invention patent, 201310028319.0 Authorized on February 4, 2015.
12. Guang-Jie Zhai, Wen-Kai Yu, and Chao Wang. Chinese invention patent, 201310027775.3 Authorized on December 31, 2014. Registered in Hong Kong: 13111785.1.
13. Shen Li, Guang-Jie Zhai, Ling-An Wu, Xu-Ri Yao, Wen-Kai Yu, Xue-Feng Liu, and Chao Wang. Chinese invention patent, 201310037772.8.
14. Xue-Feng Liu, Guang-Jie Zhai, Chao Wang, Xu-Ri Yao, and Wen-Kai Yu. Chinese invention patent, 201410232623.1.
15. Xue-Feng Liu, Guang-Jie Zhai, Chao Wang, Wen-Kai Yu, and Xu-Ri Yao. Chinese invention patent, 201410232184.4.
16. Xue-Feng Liu, Guang-Jie Zhai, Chao Wang, Wen-Kai Yu, and Xu-Ri Yao. Chinese invention patent, 201410231481.7.
 

Release date:2015-10-27