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935 results on '"Li, Xiao‐Qing"'

29. A Novel Parallel Ray-Casting Algorithm

Author

Zhang, Yan, Gao, Peng, and Li, Xiao-Qing

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Graphics
Abstract

The Ray-Casting algorithm is an important method for fast real-time surface display from 3D medical images. Based on the Ray-Casting algorithm, a novel parallel Ray-Casting algorithm is proposed in this paper. A novel operation is introduced and defined as a star operation, and star operations can be computed in parallel in the proposed algorithm compared with the serial chain of star operations in the Ray-Casting algorithm. The computation complexity of the proposed algorithm is reduced from $O(n)$ to $O(\log^n_2)$., Comment: Accepted by ICCWAMTIP 2016

Published
2018
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44. Application of team-based learning in internal medicine teaching

Author

SUN Yuan-yuan, WANG Li, LI Xiao-qing, YANG Ming, LI Hang, ZHANG Feng-chun

Subjects
team-based learning, internal medicine, Medicine
Abstract

Objective To explore the effectiveness of team-based learning(TBL) methods in internal medicine. Methods The study enrolled volunteer medical students of grade 2014 from Peking Union Medical College who were in internal medicine clerkship and had a TBL course every week. After four-month teaching, anonymous questionnaires were used to investigate students' feedback on the learning method, and then statistics and evaluation were conducted. Results A total of 30 valid questionnaires were received, and more than 50% of the students believed that TBL teaching could help them grasp the professional knowledge and improve clinical abilities. Through the students' feedback, TBL in promoting independent thinking, ability to communicate with patients’ families, medical skills, professional knowledge learning, etc., the proportion of definite agreement and agreement were 100%; In team cooperation, expression ability and independent learning ability, etc., the proportion of definite agreement and agreement were 90.0%-96.7%. In addition, the stimulating interest in learning, easy to master the knowledge and skills, totally proportion of definite agreement and agreement were less than 90%, which need to beimproved in the future. Conclusions TBL teaching may not only improve the students' learning enthusiasm and learning outcomes, but also strengthen the students' interpersonal communication capacity and team spirit. This method may be shared by other education institutions.

Published
2021

47. Comparison between electrical resistivity tomography and tunnel seismic prediction 303 methods for detecting the water zone ahead of the tunnel face: A case study

Author

Dastanboo Nima, Li Xiao-Qing, and Gharibdoost Hamed

Subjects
geophysics, tunnels, rock mechanics, ground-water hydrology, site investigations, Geology, QE1-996.5
Abstract

In deep tunnels with hydro-geological conditions, it is paramount to investigate the geological structure of the region before excavating a tunnel; otherwise, unanticipated accidents may cause serious damage and delay the project. The purpose of this study is to investigate the geological properties ahead of a tunnel face using electrical resistivity tomography (ERT) and tunnel seismic prediction (TSP) methods. During construction of the Nosoud Tunnel located in western Iran, ERT and TSP 303 methods were employed to predict geological conditions ahead of the tunnel face. In this article, the results of applying these methods are discussed. In this case, we have compared the results of the ERT method with those of the TSP 303 method. This work utilizes seismic methods and electrical tomography as two geophysical techniques are able to detect rock properties ahead of a tunnel face. This study shows that although the results of these two methods are in good agreement with each other, the results of TSP 303 are more accurate and higher quality. Also, we believe that using another geophysical method, in addition to TSP 303, could be helpful in making decisions in support of excavation, especially in complicated geological conditions.

Published
2020
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48. Application of duty competency evaluation system in standardized training of internal medicine residents

Author

HUANG Can, ZHAO Xue, LI Xiao-qing, SHI Xiao-chun, LI Hang, YAN Xiao-wei, ZHANG Feng-chun

Subjects
standardized training of residents, duty competency evaluation system, Medicine
Abstract

Objective To establish a duty competency evaluation system in Peking Union Medical College Hospital (PUMCH) which can stratify residents based on their performance and authenticate the ability to practice medicine independently on duty. Methods Residents enrolled from PUMCH Internal Medicine Training program in 2017 and 2018 were evaluated for duty competency, the number of test and time needed to pass the test were analyzed. Results The numbers of tests needed to pass were not statistically significant(χ2=9.12,P＞0.05)in postdoctoral residents, undergraduate residents and residents from Beijing training base. Time needed to pass exam showed difference(χ2=96.27,P＜0.05) in the three resident groups. The results showed that this exam helped to stratify residents. Most residents passed exam after 6 months' internship and was competent for independ practice on duty. Conclusions In standardized training of residents, duty competency evaluation system can help to assess their capability on duty, and stratified training will help residents fulfill improvement and assure clinical safety. Residents from Beijing training base needed more clinical teaching based on their performance on the exam. Most residents passed the exam after training.

Published
2020

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