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1. BEV-ODOM: Reducing Scale Drift in Monocular Visual Odometry with BEV Representation

Author

Wei, Yufei, Lu, Sha, Han, Fuzhang, Xiong, Rong, and Wang, Yue

Subjects
Computer Science - Robotics
Abstract

Monocular visual odometry (MVO) is vital in autonomous navigation and robotics, providing a cost-effective and flexible motion tracking solution, but the inherent scale ambiguity in monocular setups often leads to cumulative errors over time. In this paper, we present BEV-ODOM, a novel MVO framework leveraging the Bird's Eye View (BEV) Representation to address scale drift. Unlike existing approaches, BEV-ODOM integrates a depth-based perspective-view (PV) to BEV encoder, a correlation feature extraction neck, and a CNN-MLP-based decoder, enabling it to estimate motion across three degrees of freedom without the need for depth supervision or complex optimization techniques. Our framework reduces scale drift in long-term sequences and achieves accurate motion estimation across various datasets, including NCLT, Oxford, and KITTI. The results indicate that BEV-ODOM outperforms current MVO methods, demonstrating reduced scale drift and higher accuracy.

Published
2024

2. TEOcc: Radar-camera Multi-modal Occupancy Prediction via Temporal Enhancement

Author

Lin, Zhiwei, Jin, Hongbo, Wang, Yongtao, Wei, Yufei, and Dong, Nan

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

As a novel 3D scene representation, semantic occupancy has gained much attention in autonomous driving. However, existing occupancy prediction methods mainly focus on designing better occupancy representations, such as tri-perspective view or neural radiance fields, while ignoring the advantages of using long-temporal information. In this paper, we propose a radar-camera multi-modal temporal enhanced occupancy prediction network, dubbed TEOcc. Our method is inspired by the success of utilizing temporal information in 3D object detection. Specifically, we introduce a temporal enhancement branch to learn temporal occupancy prediction. In this branch, we randomly discard the t-k input frame of the multi-view camera and predict its 3D occupancy by long-term and short-term temporal decoders separately with the information from other adjacent frames and multi-modal inputs. Besides, to reduce computational costs and incorporate multi-modal inputs, we specially designed 3D convolutional layers for long-term and short-term temporal decoders. Furthermore, since the lightweight occupancy prediction head is a dense classification head, we propose to use a shared occupancy prediction head for the temporal enhancement and main branches. It is worth noting that the temporal enhancement branch is only performed during training and is discarded during inference. Experiment results demonstrate that TEOcc achieves state-of-the-art occupancy prediction on nuScenes benchmarks. In addition, the proposed temporal enhancement branch is a plug-and-play module that can be easily integrated into existing occupancy prediction methods to improve the performance of occupancy prediction. The code and models will be released at https://github.com/VDIGPKU/TEOcc., Comment: Accepted by ECAI2024

Published
2024

5. Optimizing the B+tree Index with Hotness Awareness and Adaptivity

Author

Wei, Yufei, Wang, Hongtao, Jin, Peiquan, Goos, Gerhard, Series 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, Huang, De-Shuang, editor, Zhang, Xiankun, editor, and Pan, Yijie, editor

Published
2024
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9. Endovascular therapy in acute ischaemic stroke with large infarction with matched or mismatched clinical-radiological severities: a post-hoc analysis of the ANGEL-ASPECT trial

Author

Wang, Yongjun, Wang, Yilong, Liu, Liping, Liebeskind, David S., Miao, Zhongrong, Ren, Zeguang, Pereira, Vitor Mendes, Ji, Xunming, Dong, Qiang, Xu, Anding, Liu, Xinfeng, Yang, Qingwu, Jing (Chair), Jing, Zhang, Zhe, Zhang, Yingkui, Wu, Wei, Sun, Dapeng, Qi, Zhongqi, Li, Shuo, Liu, Zhenqiang, Yu, Zequan, Zhang, Jingyu, Chen, Fangguang, Li, Kangyue, Zhang, Kai, Hu, Mingkai, Liu (Chair), Jianmin, Yao, Chen, Chen, Kangning, Fang (Chair), Kun, Song, Bo, Dong, Yi, Huo, Xiaochuan, Ma, Gaoting, Yuan, Guangxiong, Han, Hongxing, Chen, Wenhuo, Wei, Ming, Zhang, Jiangang, Zhou, Zhiming, Yao, Xiaoxi, Wang, Guoqing, Song, Weigen, Cai, Xueli, Nan, Guangxian, Li, Di, Wang, Yizhou, Ling, Wentong, Cai, Chuwei, Wen, Changming, Wang, En, Zhang, Liyong, Jiang, Changchun, Liu, Yajie, Liao, Geng, Chen, Xiaohui, Li, Tianxiao, Liu, Shudong, Li, Jinglun, Sun, Yaxuan, Xu, Na, Gao, Zong’en, Ju, Dongsheng, Song, Cunfeng, Xuan, Jinggang, Zhou, Feng, Shi, Qing, Luo, Jun, Liu, Yan, Guo, Zaiyu, Li, Tong, Zheng, Hongbo, Dai, Linzhi, Zhao, Junfeng, Gui, Liqiang, Geng, Xiaokun, Tang, Yufeng, Yin, Congguo, Yang, Hua, An, Ruiyang, Sun, Yuying, Wu, Yanan, Yu, Chunlai, Zheng, Shuangcheng, Pan, Yuesong, Jin, Aoming, Xiang, Xianglong, Wang, Mengxing, Yan, Hongyi, He, Yuanling, Li, Chunyang, Kong, Weixia, Chen, Yuhuan, Guo, Chenhao, Ji, Fengjie, Ji, Pengshan, Liu, Lei, Lu, Xinghua, Luo, Guangkuo, Wang, Nanjing, Zhang, Yu, Liu, Bo, Yang, Jian, Deng, Jingjing, Wang, Juan, Wang, Wanru, Yu, Hang, Cui, Le, Liu, Wenwen, Wang, Ziyong, Zhao, Xia, Zhou, Zhou, Yi-Chou Wang, Alvin, Zheng, Lina, Nie, Ximing, Liu, Xin, Duan, Wanying, Liu, Jingyi, Wei, Yufei, Wen, Miao, Yang, Zhonghua, Leung, Thomas W., Nguyen, Thanh N., and Leng, Xinyi

Published
2024
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11. 2nd Place Solution for IJCAI-PRICAI 2020 3D AI Challenge: 3D Object Reconstruction from A Single Image

Author

Cao, Yichen, Wei, Yufei, Liu, Shichao, and Xu, Lin

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

In this paper, we present our solution for the {\it IJCAI--PRICAI--20 3D AI Challenge: 3D Object Reconstruction from A Single Image}. We develop a variant of AtlasNet that consumes single 2D images and generates 3D point clouds through 2D to 3D mapping. To push the performance to the limit and present guidance on crucial implementation choices, we conduct extensive experiments to analyze the influence of decoder design and different settings on the normalization, projection, and sampling methods. Our method achieves 2nd place in the final track with a score of $70.88$, a chamfer distance of $36.87$, and a mean f-score of $59.18$. The source code of our method will be available at https://github.com/em-data/Enhanced_AtlasNet_3DReconstruction., Comment: 5 pages, 2 figures, 5 tables

Published
2021

16. A Dual Path Saliency Detection with MSER and Grayscale Scarcity

Author

Wei, Yufei, Ma, Yuteng, Jiang, Dongzhi, Wu, Chen, Deng, Chenwei, Chinese Institute of Command and Control, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, and Zhang, Junjie James, Series Editor

Published
2022
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17. Reinforcement Learning for Mobile Robot Obstacle Avoidance with Deep Deterministic Policy Gradient

Author

Chen, Miao, Li, Wenna, Fei, Shihan, Wei, Yufei, Tu, Mingyang, Li, Jiangbo, 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, Honghai, editor, Yin, Zhouping, editor, Liu, Lianqing, editor, Jiang, Li, editor, Gu, Guoying, editor, Wu, Xinyu, editor, and Ren, Weihong, editor

Published
2022
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21. Endovascular therapy in acute ischaemic stroke with large infarction with matched or mismatched clinical-radiological severities: a post-hoc analysis of the ANGEL-ASPECT trial

Author

Zheng, Lina, primary, Nie, Ximing, additional, Wang, Mengxing, additional, Liu, Xin, additional, Duan, Wanying, additional, Zhang, Zhe, additional, Liu, Jingyi, additional, Wei, Yufei, additional, Wen, Miao, additional, Yang, Zhonghua, additional, Leung, Thomas W., additional, Ma, Gaoting, additional, Huo, Xiaochuan, additional, Pan, Yuesong, additional, Nguyen, Thanh N., additional, Leng, Xinyi, additional, Miao, Zhongrong, additional, Liu, Liping, additional, Wang, Yongjun, additional, Wang, Yilong, additional, Liebeskind, David S., additional, Ren, Zeguang, additional, Pereira, Vitor Mendes, additional, Ji, Xunming, additional, Dong, Qiang, additional, Xu, Anding, additional, Liu, Xinfeng, additional, Yang, Qingwu, additional, Jing (Chair), Jing, additional, Zhang, Yingkui, additional, Wu, Wei, additional, Sun, Dapeng, additional, Qi, Zhongqi, additional, Li, Shuo, additional, Liu, Zhenqiang, additional, Yu, Zequan, additional, Zhang, Jingyu, additional, Chen, Fangguang, additional, Li, Kangyue, additional, Zhang, Kai, additional, Hu, Mingkai, additional, Liu (Chair), Jianmin, additional, Yao, Chen, additional, Chen, Kangning, additional, Fang (Chair), Kun, additional, Song, Bo, additional, Dong, Yi, additional, Yuan, Guangxiong, additional, Han, Hongxing, additional, Chen, Wenhuo, additional, Wei, Ming, additional, Zhang, Jiangang, additional, Zhou, Zhiming, additional, Yao, Xiaoxi, additional, Wang, Guoqing, additional, Song, Weigen, additional, Cai, Xueli, additional, Nan, Guangxian, additional, Li, Di, additional, Wang, Yizhou, additional, Ling, Wentong, additional, Cai, Chuwei, additional, Wen, Changming, additional, Wang, En, additional, Zhang, Liyong, additional, Jiang, Changchun, additional, Liu, Yajie, additional, Liao, Geng, additional, Chen, Xiaohui, additional, Li, Tianxiao, additional, Liu, Shudong, additional, Li, Jinglun, additional, Sun, Yaxuan, additional, Xu, Na, additional, Gao, Zong’en, additional, Ju, Dongsheng, additional, Song, Cunfeng, additional, Xuan, Jinggang, additional, Zhou, Feng, additional, Shi, Qing, additional, Luo, Jun, additional, Liu, Yan, additional, Guo, Zaiyu, additional, Li, Tong, additional, Zheng, Hongbo, additional, Dai, Linzhi, additional, Zhao, Junfeng, additional, Gui, Liqiang, additional, Geng, Xiaokun, additional, Tang, Yufeng, additional, Yin, Congguo, additional, Yang, Hua, additional, An, Ruiyang, additional, Sun, Yuying, additional, Wu, Yanan, additional, Yu, Chunlai, additional, Zheng, Shuangcheng, additional, Jin, Aoming, additional, Xiang, Xianglong, additional, Yan, Hongyi, additional, He, Yuanling, additional, Li, Chunyang, additional, Kong, Weixia, additional, Chen, Yuhuan, additional, Guo, Chenhao, additional, Ji, Fengjie, additional, Ji, Pengshan, additional, Liu, Lei, additional, Lu, Xinghua, additional, Luo, Guangkuo, additional, Wang, Nanjing, additional, Zhang, Yu, additional, Liu, Bo, additional, Yang, Jian, additional, Deng, Jingjing, additional, Wang, Juan, additional, Wang, Wanru, additional, Yu, Hang, additional, Cui, Le, additional, Liu, Wenwen, additional, Wang, Ziyong, additional, Zhao, Xia, additional, Zhou, Zhou, additional, and Yi-Chou Wang, Alvin, additional

Published
2024
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26. Intelligent Supervision System for Vehicles and Drivers in Large Open-pit Operation Site

Author

YANG Yang, WANG Danyang, LYU Wenwei, ZHANG Yu, WEI Yufei, HE Xiao, HAN Guolu

Subjects
open pit mine, smart supervision system, vehicle management system, vehicle terminal, cloud server, Mining engineering. Metallurgy, TN1-997
Abstract

This paper introduces the intelligent supervision system of vehicles and drivers in large-scale open-pit operation site. The intelligent supervision system is divided into two types: one is the standard intelligent supervision system which adopts the scheme of deploying intelligent inspection post on the job site to supervise the staff, that is the regional supervision system; the other is the enhanced intelligent supervision system which adopts the supervision scheme of distributing intelligent terminals to all vehicles and personnel, that is the dynamic supervision system of the whole range. This paper discusses the composition, function and work flow of the standard intelligent supervision system, and the composition, function and work flow of the vehicle management subsystem and personnel management subsystem of the enhanced intelligent supervision system.

Published
2020
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27. Endophytic Microorganisms in Tomato Roots, Changes in the Structure and Function of the Community at Different Growing Stages.

Author

Wei, Yufei, Chen, Siyu, Zhou, Xinyan, Ding, Diancao, Song, Jingjing, and Yang, Shangdong

Subjects
ENDOPHYTIC bacteria, TOMATOES, NUTRIENT cycles, MICROORGANISMS, FUNGAL communities, NUCLEOTIDE sequencing, ROOT growth
Abstract

This study analyzed flower bud differentiation and fruiting stages to investigate how the structure of the plant endophytic microbial community in the roots of tomatoes changes with plant senescence. Based on high-throughput sequencing technology, the diversity and relative abundance of endophytic microorganisms (bacteria and fungi) in tomato stems at different growth stages were analyzed. At the same time, based on LEfSe analysis, the differences in endophytic microorganisms in tomato stems at different growth stages were studied. Based on PICRUSt2 function prediction and FUNGuild, we predicted the functions of endophytic bacterial and fungal communities in tomato stems at different growth stages to explore potential microbial functional traits. The results demonstrated that not only different unique bacterial genera but also unique fungal genera could be found colonizing tomato roots at different growth stages. In tomato seedlings, flower bud differentiation, and fruiting stages, the functions of colonizing endophytes in tomato roots could primarily contribute to the promotion of plant growth, stress resistance, and improvement in nutrient cycling, respectively. These results also suggest that different functional endophytes colonize tomato roots at different growth stages. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Early versus delayed antihypertensive treatment in patients with acute ischaemic stroke: multicentre, open label, randomised, controlled trial

Author

Liu, Liping, primary, Xie, Xuewei, additional, Pan, Yuesong, additional, Wang, Aili, additional, Wei, Yufei, additional, Liu, Jingyi, additional, Nie, Ximing, additional, Liu, Dacheng, additional, Zhao, Zilin, additional, Wang, Penglian, additional, Shen, Suwen, additional, Zhong, Chongke, additional, Xu, Tan, additional, Wang, Dali, additional, Wang, Gui-Chun, additional, Song, Denghua, additional, Ma, Yunsheng, additional, Zhao, Jinguo, additional, Jiang, Yong, additional, Jing, Jing, additional, Meng, Xia, additional, Obst, Katherine, additional, Chen, Chung-Shiuan, additional, Wang, David, additional, Wang, Yilong, additional, Zhang, Yonghong, additional, Wang, Yongjun, additional, and He, Jiang, additional

Published
2023
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38. Effect of left ventricular ejection fraction Spectrum on 1‐Year mortality in patients with acute ischemic stroke or transient ischemic attack.

Author

Wei, Na, Wei, Yufei, Nie, Ximing, Liu, Xiran, Xiang, Xianglong, Pan, Yuesong, Meng, Xia, Liu, Liping, and Wang, Yongjun

Subjects
*TRANSIENT ischemic attack, *STROKE patients, *VENTRICULAR ejection fraction, *ISCHEMIC stroke, *CEREBROVASCULAR disease
Abstract

Aims: We aimed to investigate the association of the left ventricular ejection fraction (LVEF) spectrum with 1‐year clinical outcomes in patients with acute ischemic stroke (AIS) or transient ischemic attack (TIA). Methods: In a prospective registry for the Third China National Stroke Registry (CNSR‐III), AIS or TIA patients with echocardiography records during hospitalization were recruited. All LVEFs were categorized into intervals of 5% in width. The lowest and highest intervals are ≤40% and >70%, respectively. The primary outcome was all‐cause death at 1 year. Cox proportional hazards regression analysis was performed to investigate the association between baseline LVEF and clinical outcomes. Results: This analysis included a total of 14,053 patients. In total, 418 patients died during 1‐year follow‐up. Overall, LVEF ≤60% was associated with a higher risk of all‐cause death compared to LVEF >60%, independent of demographic and clinical characteristics (aHR 1.29 [95% CI 1.06–1.58]; p = 0.01). The cumulative incidence of all‐cause death was significantly different among the eight LVEF groups that survival declined successively with the decrease of LVEF (log‐rank p ≤ 0.0001). Conclusions: Patients with AIS or TIA with decreased LVEF (≤60%) had a lower 1‐year survival rate after onset. LVEF 50%–60% even within the normal range, may still contribute to poor outcomes in AIS or TIA. Comprehensive evaluation of cardiac function after acute ischemic cerebrovascular disease should be strengthened. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Fully automatic identification of post-treatment infarct lesions after endovascular therapy based on non-contrast computed tomography

Author

Nie, Ximing, primary, Liu, Xiran, additional, Yang, Hao, additional, Shi, Feng, additional, Gu, Weibin, additional, Hou, Xinyi, additional, Wei, Yufei, additional, Lu, Qixuan, additional, Bai, Haiwei, additional, Chen, Jiaping, additional, Liu, Tianhang, additional, Yan, Hongyi, additional, Yang, Zhonghua, additional, Wen, Miao, additional, Pan, Yuesong, additional, Huang, Chao, additional, Wang, Long, additional, and Liu, Liping, additional

Published
2022
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45. Increased serum uric acid level is associated with better outcome after endovascular treatment for acute ischemic stroke—a prospective cohort study

Author

Bai, Haiwei, primary, Nie, Ximing, additional, Leng, Xinyi, additional, Wang, David, additional, Pan, Yuesong, additional, Yan, Hongyi, additional, Yang, Zhonghua, additional, Wen, Miao, additional, Pu, Yuehua, additional, Zhang, Zhe, additional, Duan, Wanying, additional, Ma, Ning, additional, Miao, Zhongrong, additional, Liu, Xiran, additional, Lu, Qixuan, additional, Wei, Yufei, additional, Liu, Liping, additional, and Liu, Junyan, additional

Published
2022
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46. Platelet-activating factor receptor antagonists of natural origin for acute ischemic stroke: a systematic review of current evidence

Author

Li, Tingting, Zhang, Xuebin, Jiang, Ping, Zhang, Dandan, Feng, Luda, Lai, Xinxing, Qin, Mingzhen, Wei, Yufei, Zhang, Chi, and Gao, Ying

Subjects
Pharmacology, Pharmacology (medical)
Abstract

Background: Acute ischemic stroke (AIS) is a common cause of death and long-term disability worldwide. Recent trials of platelet-activating factor receptor antagonists (PAFRA) appeared to indicate that they could play a neuroprotective role in the treatment of AIS; therefore, we conducted a systematic literature review to evaluate the clinical efficacy and safety of PAFRA in patients with AIS.Methods: A systematic literature search was performed in seven electronic databases from inception to 11 March 2022. All randomized controlled trials (RCTs) in which patients were treated with PAFRA strategies within 7 days of stroke onset were included. Modified Rankin Scale (mRS) was selected as the primary outcome of this systematic review. The methodological quality of included studies was assessed based on the Cochrane Collaborations tool. The review protocol was previously registered (PROSPERO CRD42020182075).Results: Fifteen RCTs comprising a total of 3,907 participants were included in this study. The PAFRA-related compounds included natural preparations of terpenoids, flavonoids, and saponins, namely, ginkgo endoterpene diester meglumine (GEDM, seven RCTs), ginkgo biloba dropping pill (GBDP, one RCT), ginkgolide injection (GDI, four RCTs), hesperidin (HES, one RCT), ginsenoside Rd injection (GSRI, one RCT), and hydroxysafflor yellow A (HSYA, one RCT). All studies were conducted in China between 2017 and 2021, employing a two-arm parallel design with sample sizes ranging from 40 to 1,113. Eight studies (53.3%) provided no information on their method of randomization, and only two studies (13.3%) utilized the double-blind design. Treatment was associated with improved clinical outcomes for (1) GEDM, GDI, and GBDP in patients treated with conventional treatment (CM) [GEDM + CM for AIS on mRS: MDmRS = −0.42, 95% CI (−0.47, −0.37), five trials, p < 0.00001; GEDM + CM for AIS on NIHSS: MDNIHSS = −1.02, 95% CI (−1.51, −0.52), four trials, p < 0.0001]; (2) GEDM and GDI in patients treated with neuroprotective agent (NPA) [GEDM + NPA + CM for AIS on mRS: MDmRS = −0.40, 95% CI (−0.54, −0.26), p < 0.00001; GEDM + NPA + CM for AIS on NIHSS: MDNIHSS = −3.93, 95%CI (−7.72, −0.14), p = 0.04]; (3) GBDP in patients treated with CM; (4) GDI and GSRI in patients treated with IV rt-PA therapy (IVT); and (5) HSYA in patients compared with Dengzhan Xixin injection (DZXXI). No access to improved clinical outcome was associated with HES in patients treated with IVT. Seven RCTs reported adverse events (AEs) but found that taking PAFRA-related preparations was not associated with an increased incidence of AEs.Conclusions: This systematic review not only makes an important contribution to the existing body of current evidence but also lays a well-conducted basis for providing opinions and recommendation on the evaluation of PAFRA-based medicine, which could also highlight the need for well-designed clinical trials of PAFRA for AIS to increase the quality of available evidence. Further research is required, using standardized functional outcome measures for AIS, adequate blinding and suitable comparator groups reflecting current best practice.

Published
2022
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