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42 results on '"Lai, Lingfeng"'

2. Segmenting Key Clues to Induce Human-Object Interaction Detection

Author

Xue, Mingliang, Wang, Siwei, Fu, Bing, Zhao, Zhengyang, Liu, Tao, Lai, Lingfeng, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Liu, Qingshan, editor, Wang, Hanzi, editor, Ma, Zhanyu, editor, Zheng, Weishi, editor, Zha, Hongbin, editor, Chen, Xilin, editor, Wang, Liang, editor, and Ji, Rongrong, editor

Published
2024
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13. Fast evaluation of the critical current of high-temperature superconducting coils based on the integral method.

Author

Zhong, Junlin, Zou, Shengnan, Lai, Lingfeng, Chen, Pengrong, and Deng, Shutong

Subjects
CRITICAL currents, SUPERCONDUCTING magnets, SUPERCONDUCTING coils, HIGH temperature superconductors, SUPERCONDUCTORS, FINITE element method, DENSITY of states
Abstract

The need for energy is growing as civilization develops. Superconductors have various benefits over regular conductors, including a high current-carrying density and nearly no resistance. Therefore, the objective that scientists continue to seek is the use of superconductors to replace traditional conductors in order to satisfy the demand for energy. As a key part of the superconducting electrical system, the critical current is one of the key properties of high-temperature superconducting (HTS) coils. Scholars have created a variety of numerical simulation models to estimate the performance of HTS coils. However, the extremely nonlinear E–J power law relationship that characterizes the voltage–current relationship in superconducting materials necessitates numerous iterative refinements during the coil design stage, which is time-consuming from the perspective of computing efficiency. Consequently, it is essential to increase computational efficiency. In this study, the critical current of HTS coils was calculated using the J model (integral method with the current density J as the state solution variable), and it was proved to be an efficient research method. The accuracy of the method is verified by comparing with the H model and the experimental measurement results of the critical current of the HTS coil. Moreover, compared with the reference finite element simulation model, this model has a speed advantage of at least four times, which is a good choice, especially, for HTS circular coils with large turns. [ABSTRACT FROM AUTHOR]

Published
2022
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21. Combination of Quantitative Susceptibility Mapping and Diffusion Kurtosis Imaging Provides Potential Biomarkers for Early-Stage Parkinson’s Disease

Author

Rong, Yunjie, primary, Xu, Zhifeng, additional, Zhu, Ye, additional, Zhang, Xianhai, additional, Lai, Lingfeng, additional, Sun, Shuyi, additional, Gao, Mingyong, additional, Guo, Pi, additional, Zhang, Guohua, additional, Geng, Yiqun, additional, Ma, Xilun, additional, Wu, Shuohua, additional, Yang, Lin, additional, Shen, Zhiwei, additional, and Guan, Jitian, additional

Published
2022
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24. Proton Magnetic Resonance Spectroscopy for Diagnosis of Non-Motor Symptoms in Parkinson's Disease

Author

Guan, Ji-tian, primary, Zheng, Xin, additional, Lai, Lingfeng, additional, Sun, Shuyi, additional, Geng, Yiqun, additional, Zhang, Xiaolei, additional, Zhou, Teng, additional, Wu, Huan-ze, additional, Chen, Jia-qing, additional, Yang, Zhong-xian, additional, zheng, Xiao-hong, additional, Wang, Jia-xu, additional, Chen, Wei, additional, and Zhang, You-qiao, additional

Published
2022
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26. Endovascular Aneurysm Treatment with the Numen Coil Embolization System: A Prospective Randomized Controlled Open-Label Multicenter Noninferiority Trial in China

Author

Rui Zhao, Guoli Duan, Pengfei Yang, Tianxiao Li, Sheng Guan, Hua Yang, Zhenwei Zhao, Xingen Zhu, Guobiao Liang, Xin Wu, Bing Leng, Yang Wang, Yina Wu, Qiao Zuo, Lei Zhang, ZiFu Li, Yu Zhou, Kaijun Zhao, Dongwei Dai, Yibin Fang, Qiang Li, Qinghai Huang, Bo Hong, Yi Xu, Jianmin Liu, Zhang Kaixia, Chen Gong, Ann Qingzhu, Zheng Yongtao, He Yingkun, Bai Weixing, Kang Xiaoyu, Wang Ning, Guan Min, Xu Bin, Duan Guangming, Li Li, Zhu Liangfu, Zhou Zhilong, Shao Qiuji, Chang Kaitao, Wu Liheng, Li Qiang, Gu Jianjun, Zhang Kun, Wang Yongfeng, Zhao Zhiyu, Chen Zhen, Xu Haowen, Wang Linyu, Guo Xinbin, Liu Chao, Fang Feng, Liu Zining, Guo Yuanyuan, Chen Hu, Yan Zhongjun, Fang Wei, Lu Wenyan, Li Jiang, Deng Jianping, Li Zhihong, Gao Xu, Wang Xiaogang, Dong Yushu, Li Chuangzhong, Liu Song, Teng Lu, Yuan Yuan, Shang Minghua, Zhang Zaiqiang, Wang Jing, Sang Guifeng, Cheng Jiyong, Zhang Zhen, Zhou Xiaobing, Chen Yan, Lai Lingfeng, Dong Youqing, Mao Guohua, Zhu Jianming, Lai Xianliang, Gao Ziyun, Song Shuxin, Ye Minhua, Fan Yijin, Xiang Xin, Peng Han, Yan Jian, and Fang Wenting

Subjects
Blood Vessel Prosthesis Implantation, Treatment Outcome, Endovascular Procedures, Humans, Surgery, Intracranial Aneurysm, Neurology (clinical), Prospective Studies, Embolization, Therapeutic, Aortic Aneurysm, Abdominal, Follow-Up Studies
Abstract

We investigated the safety and efficacy of the Numen coil compared with the Axium coil in the treatment of intracranial aneurysms.Because CATCH (Coil Application Trial in China) is a prospective randomized controlled open-label noninferiority trial conducted in 10 centers across China, patients who fulfilled the inclusion and exclusion criteria were randomized 1:1 to either a test group (Numen) or a control group (Axium). The primary outcome was based on successful aneurysm occlusion at 6 months follow-up, whereas secondary outcomes included technical success, the recanalization and retreatment rates, and the rate of serious adverse events (SAEs) at 6 months and 12 months follow-up.Between August 2017 and December 2019, 350 patients presenting with 350 aneurysms were enrolled and randomized. Per-protocol analysis showed that the successful aneurysm occlusion rate at 6 months was 91.18% for the test group compared with 91.85% in the control group, with a difference of -0.68% (P = 0.8419), and the overall mortality during the 30-day follow-up period was 1.19% and 1.81% in the test and control group, respectively, showing no significant difference between the 2 groups (P = 0.6837), whereas the SAE incidence during the 12-month follow-up period was 12.50% and 17.47% in the test and control groups, respectively, which was not statistically significant (P = 0.2222).This trial showed that the Numen coil was noninferior to the Axium coil in terms of intracranial aneurysm embolization and can be considered as a safe and effective coil for treating patients with intracranial aneurysm in clinical practice.

Published
2021

37. AC loss calculation in REBCO coils or stacks by solving the equation of motion for current using an integration approach.

Author

Lai, Lingfeng and Gu, Chen

Subjects
*ECONOMIC efficiency, *DEBYE temperatures, *MAGNETIC fields, *HIGH temperatures, *UNIFORMITY
Abstract

The flux motion and its collective behaviour known as AC loss is the basic characteristic of high temperature superconducting (HTS) materials and controls the economic efficiency, stability and magnetic field uniformity of superconducting equipment. In so far, we have no method to calculate the AC loss of HTS devices in an efficient way. Normally, it will take days to simulate AC loss of HTS coils even with moderate number of turns. In this paper, we surprisingly found that an integral method is remarkably efficient in calculating AC loss of the coils in large scale. By comparing with the fastest method at present, the integral method is proved to be 4.4 times faster than the present one. We give the calculation details and discuss why this method has an advantage in calculating AC loss of the coil with a large number of turns. [ABSTRACT FROM AUTHOR]

Published
2021
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