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1,135 results on '"Li, Yan-Feng"'

53. List of Contributors

Author

Abreu, Danilo T.M.P., primary, Colombo, Danilo, additional, Cristino, Cláudio T., additional, Dimri, S.C., additional, Firmino, Paulo R.A., additional, Gaonkar, Rajesh S. Prabhu, additional, Garia, Meenakshi, additional, Grozovskiy, G.I., additional, Huang, Hong-Zhong, additional, Huang, Tudi, additional, Knezevic, Jezdimir, additional, Kumar, Akshay, additional, Li, Yan-Feng, additional, Malinowski, Jacek, additional, Martins, Marcelo Ramos, additional, Mittal, Abhishek, additional, de Oliveira, Cícero C.F., additional, Pai, Anusha, additional, Pai, Raghavendra, additional, Parfenychev, S.S., additional, Qian, Hua-Ming, additional, Rai, Rajiv Nandan, additional, Ram, Mangey, additional, Rane, Santosh B., additional, Rane, Suraj, additional, Seo, Sun-Keun, additional, Sharma, Garima, additional, Shi, Lei, additional, Tamura, Yoshinobu, additional, Triantafyllou, Ioannis S., additional, Verlekar, Mahadev V., additional, Yamada, Shigeru, additional, Yun, Won Young, additional, and Zadavin,, G.D., additional

Published
2021
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96. Treatment of complicated urinary tract infection and acute pyelonephritis by short-course intravenous levofloxacin (750 mg/day) or conventional intravenous/oral levofloxacin (500 mg/day): prospective, open-label, randomized, controlled, multicenter, non-inferiority clinical trial

Author

Ren, Hong, Li, Xiao, Ni, Zhao-Hui, Niu, Jian-Ying, Cao, Bin, Xu, Jie, Cheng, Hong, Tu, Xiao-Wen, Ren, Ai-Min, Hu, Ying, Xing, Chang-Ying, Liu, Ying-Hong, Li, Yan-Feng, Cen, Jun, Zhou, Rong, Xu, Xu-Dong, Qiu, Xiao-Hui, and Chen, Nan

Published
2017
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99. Sitting or Standing Data Acquisition Based Breast Ultrasound Computed Tomography

Author

Peng Yahui, LI Ruijing, Chen Houjin, Li Jupeng, and Li Yan-Feng

Subjects
medicine.diagnostic_test, Computer science, business.industry, Breast imaging, Applied Mathematics, Ultrasound, Iterative reconstruction, medicine.disease, Sitting, Breast cancer, Data acquisition, medicine, Computer vision, Noise (video), Artificial intelligence, Electrical and Electronic Engineering, skin and connective tissue diseases, business, Breast ultrasound
Abstract

Ultrasound computed tomography (UCT) is a promising approach for early breast cancer screening. However, current studies which use prone posture to collect breast ultrasonic data cause four problems, a long non-data-acquisition time, inconvenient, possible chances for cross infection, and a large area occupied by equipment. The purpose of this study is to estimate a complete breast UCT image by using sitting or standing data acquisition, which can obtains a more rapid, convenient and sanitary examination process, and a less space occupied by equipment. Therefore, this study proposes a sitting or standing data acquisition based breast UCT method, which is a more practical data acquisition method for breast UCT. This study places a uniform soft sleeve on the outside of the breast so that it would not be deformed significantly due to the change of body posture. Because the soft sleeve is an influencing factor from outside for breast imaging, this study discusses the considerations for selecting that. Computer simulations are conducted to prove the effectiveness of the proposed method. Results suggest that, by using a soft sleeve whose sound speed is between 1450m/s and 1550m/s, the proposed method is effective; the biases of the reconstructed images are less than 1% under the 5% noise condition.

Published
2021

100. A Numerical Study on Combustion and Emission Characteristics of a Medium-Speed Diesel Engine Using In-Cylinder Cleaning Technologies

Author

Shuang He, Bao-Guo Du, Li-Yan Feng, Yao Fu, Jing-Chen Cui, and Wu-Qiang Long

Subjects
medium-speed diesel engine, Miller cycle, EGR, NOx emissions, numerical simulation, Technology
Abstract

In order to clarify the potential of internal purification methods on medium speed diesel engines to meet the IMO Tier III nitrogen oxide (NOx) emission regulations, combined 1-D engine working cycle simulation and 3-D CFD simulation were conducted to predict the performance and emissions of the engine under different valve close timings, geometric compression ratios, injection timings, and Exhaust Gas Recirculation (EGR) rates. The numerical results show that, as the inlet valve close timing is advanced, NOx is reduced by as much as 27%, but the peak of premixed combustion heat release rate is increased; this can weaken the ability to reduce NOx with the Miller cycle. Moreover, the peak of premixed combustion heat release rate is reduced when the geometric compression ratio is increased to 15.4, and linking with injection timing by delaying 6°CA can further reduce NOx by 55.3% from the baseline. Finally, over 80% NOx reduction can be achieved when the above schemes are combined with over 15% EGR. The NOx and soot can be reduced simultaneously by using moderate Miller cycle combination with moderate EGR, and the results show a large reduction of NOx and moderate reduction of soot. This can be a feasible technical solution to meet Tier III regulations.

Published
2015
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