3篇
您的检索式：作者名="Weichen Dai"
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| 1 | Numerical simulation on the seismic absorption effect of the cushion in rigid-pile composite foundation显示文摘In order to quantitatively study the seismic absorption effect of the cushion on a superstructure, a numerical simulation and parametric study are carried out on the overall FEA model of a rigid-pile composite foundation in ABAQUS. A simulation of a shaking table test on a rigid mass block is first completed with ABAQUS and EERA, and the effectiveness of the Drucker-Prager constitutive model and the finite-infinite element coupling method is proved. Dynamic time-history analysis of the overall model under frequent and rare earthquakes is carried out using seismic waves from the El Centro, Kobe, and Bonds earthquakes. The different responses of rigid-pile composite foundations and pile-raft foundations are discussed. Furthermore, the influence of thickness and modulus of cushion, and ground acceleration on the seismic absorption effect of the cushion are analyzed. The results show that: 1) the seismic absorption effect of a cushion is good under rare earthquakes, with an absorption ratio of about 0.85; and 2) the seismic absorption effect is strongly affected by cushion thickness and ground acceleration. | Han Xiaolei Li Yaokun Ji Jing Ying Junhao Li Weichen Dai Baicheng | 2016 | Earthquake Engineering and Engineering Vibration2016，15，2： | 5 |
| 2 | RGB-D SLAM with moving object tracking in dynamic environments显示文摘Simultaneous localization and mapping methods are fundamental to many robotic applications.In dynamic environments,SLAM methods focus on eliminating the influence of moving objects to construct a static map since they assume a static world.To improve localization robustness in dynamic environments,an RGB-D SLAM method is proposed to build a complete 3D map containing both static and dynamic maps,the latter of which consists of the trajectories and points of the moving objects.Without any prior knowledge of the moving targets,the proposed method uses only the correlation between map points to discriminate between the static scene and the moving objects.After the static points are determined,camera motion estimation is performed only on reliable static map points to eliminate the influence of moving objects.The motion of the moving objects will then be estimated with the obtained camera motion by tracking their dynamic points in subsequent frames.Moreover,multiple groups of dynamic points that belong to the same moving object are fused by a volume overlap checking step.Experimental results are presented to demonstrate the feasibility and performance of the proposed method. | Weichen Dai Yu Zhang Yuxin Zheng Donglei Sun Ping Li | 2021 | IET Cyber-Systems and Robotics2021，3，4： | 1 |
| 3 | Drift-free localisation using prior cross-source map for indoor low-light environments显示文摘In this study,a localisation system without cumulative errors is proposed.First,depth odometry is achieved only by using the depth information from the depth camera.Then the point cloud cross-source map registration is realised by 3D particle filtering to obtain the pose of the point cloud relative to the map.Furthermore,we fuse the odometry results with the point cloud to map registration results,so the system can operate effectively even if the map is incomplete.The effectiveness of the system for long-term localisation,localisation in the incomplete map,and localisation in low light through multiple experiments on the self-recorded dataset is demonstrated.Compared with other methods,the results are better than theirs and achieve high indoor localisation accuracy. | Junyi Tao Weichen Dai Da Kong Jiayan Wan Bin He Yu Zhang | 2023 | IET Cyber-Systems and Robotics2023，5，1： | 0 |
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