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89 results on '"Jiang, Yunxiang"'

1. Quantitative Evaluation of driver's situation awareness in virtual driving through Eye tracking analysis

Author

Jiang, Yunxiang, Xu, Qing, Zhen, Kai, and Chen, Yu

Subjects
Computer Science - Human-Computer Interaction, Computer Science - Graphics
Abstract

In driving tasks, the driver's situation awareness of the surrounding scenario is crucial for safety driving. However, current methods of measuring situation awareness mostly rely on subjective questionnaires, which interrupt tasks and lack non-intrusive quantification. To address this issue, our study utilizes objective gaze motion data to provide an interference-free quantification method for situation awareness. Three quantitative scores are proposed to represent three different levels of awareness: perception, comprehension, and projection, and an overall score of situation awareness is also proposed based on above three scores. To validate our findings, we conducted experiments where subjects performed driving tasks in a virtual reality simulated environment. All the four proposed situation awareness scores have clearly shown a significant correlation with driving performance. The proposed not only illuminates a new path for understanding and evaluating the situation awareness but also offers a satisfying proxy for driving performance.

Published
2024

4. Usability Evaluation of FURS Robot Control Panel Interface Design Based on SUS

Author

You, Yong, Wei, Lai, Zhu, Shiqiang, Yu, Yongwu, Jiang, Yunxiang, Liu, Xiaolei, Han, Jianda, Chen, Lingkai, Song, Wei, 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, Yang, Huayong, editor, Liu, Honghai, editor, Zou, Jun, editor, Yin, Zhouping, editor, Liu, Lianqing, editor, Yang, Geng, editor, Ouyang, Xiaoping, editor, and Wang, Zhiyong, editor

Published
2023
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5. Analysis and Research on an Equivalent Circuit of LiFePO4 Battery Under a High Discharge Rate

Author

Huang, Liming, Xia, Yihui, Jiang, Yunxiang, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, 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, 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, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, 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, Zhang, Junjie James, Series Editor, Tan, Kay Chen, Series Editor, Dong, Xuzhu, editor, Yang, Qingxin, editor, and Ma, Weiming, editor

Published
2023
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13. Distributed Power Splitting for SWIPT in Relay Interference Channels using Game Theory

Author

Chen, He, Li, Yonghui, Jiang, Yunxiang, Ma, Yuanye, and Vucetic, Branka

Subjects
Computer Science - Information Theory
Abstract

In this paper, we consider simultaneous wireless information and power transfer (SWIPT) in relay interference channels, where multiple source-destination pairs communicate through their dedicated energy harvesting relays. Each relay needs to split its received signal from sources into two streams: one for information forwarding and the other for energy harvesting. We develop a distributed power splitting framework using game theory to derive a profile of power splitting ratios for all relays that can achieve a good network-wide performance. Specifically, non-cooperative games are respectively formulated for pure amplify-and-forward (AF) and decode-and-forward (DF) networks, in which each link is modeled as a strategic player who aims to maximize its own achievable rate. The existence and uniqueness for the Nash equilibriums (NEs) of the formulated games are analyzed and a distributed algorithm with provable convergence to achieve the NEs is also developed. Subsequently, the developed framework is extended to the more general network setting with mixed AF and DF relays. All the theoretical analyses are validated by extensive numerical results. Simulation results show that the proposed game-theoretical approach can achieve a near-optimal network-wide performance on average, especially for the scenarios with relatively low and moderate interference., Comment: Full version of a paper accepted by IEEE Trans. Wireless Commun., 14 pages

Published
2014
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16. Tool Center Point Calibration via Posture-Sequence Particle Swarm Optimization

Author

Gao, Ziqi, Li, Yingli, Luo, Yang, Sun, Jincheng, Ying, Yuhan, Jiang, Yunxiang, Zhao, Xingang, and Zhao, Yiwen

Abstract

Robots’ manipulation accuracy is heavily determined by the calibration accuracy of the tool center point (TCP). This article proposes posture-sequence particle swarm optimization (PS2O) for TCP calibration. First, the mechanism of the condition number and the minimum eigenvalue of the regression matrix on the calibration accuracy are analyzed. Second, a multiobjective optimization problem is constructed based on the condition number, the minimum eigenvalue, and the sum of adjacent posture distances. Finally, an optimized posture sequence is obtained by applying the particle swarm optimization (PSO) algorithm to the constructed multiobjective optimization problem. Simulations and experiments demonstrate that the error of TCP calibration can be characterized by the condition number and the minimum eigenvalue of the regression matrix. Compared with random posture sampling, the optimized posture sequence for sampling reduces the norm of the calibration error by 38.66%. Thus, PS2O has great potential to improve robots’ manipulation accuracy.

Published
2024
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21. TDD-Based Massive MIMO Systems: Overview and Development

Author

Shi, Ronghua, Tang, Kun, Dong, Jian, Lei, Wentai, Peng, Chunhua, Jiang, Yunxiang, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Wang, Guojin, editor, Zomaya, Albert, editor, Martinez, Gregorio, editor, and Li, Kenli, editor

Published
2015
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34. Design of a Novel Force Feedback Master Manipulator

Author

Hong Jia, Peng Sun, Yiwen Zhao, and Jiang Yunxiang

Subjects
Engineering, Inverse kinematics, business.industry, Parallel manipulator, Stiffness, Control engineering, Workspace, Kinematics, Computer Science::Robotics, Mechanism (engineering), Control and Systems Engineering, Control theory, Position (vector), medicine, medicine.symptom, business, Haptic technology
Abstract

This paper presents a novel master manipulator which specifically used in the operation of internal fixation of the pedicle screw. First, in consideration of the practical demand in this surgery, the mechanical design of parallel and serial mechanism is given according to specific design parameters. The mechanism consists of a three DOF of the improved Delta parallel mechanism to position the drill and a two DOF of a serial mechanism to adjust the posture. Then, the revised algorithm of the forward and inverse kinematics towards the improved Delta mechanism and the integral kinematics are illustrated. After that, the workspace and stiffness analysis are analyzed in three transformational directions to test its performance of maximum force feedback and stiffness. The analysis shows that this novel master manipulator meets the requirements in this specific spinal surgery.

Published
2015

35. Calibration method for multiple FOV star sensors based on three-axis turntable

Author

王春喜 Wang Chunxi, 吴 跃 Wu Yue, 姜云翔 Jiang Yunxiang, 王锴磊 Wang Kailei, and 熊 琨 Xiong Kun

Subjects
Physics, Optics, Space and Planetary Science, business.industry, Calibration (statistics), Aerospace Engineering, Electrical and Electronic Engineering, Star (graph theory), business, Atomic and Molecular Physics, and Optics
Published
2019

44. Max?Min Weighted Downlink SINR With Uplink SINR Constraints for Full-Duplex MIMO Systems.

Author

Jiang, Yunxiang, Lau, Francis C. M., Ho, Ivan Wang-Hei, Chen, He, and Huang, Yongming

Subjects
*MIMO systems, *SIGNAL-to-noise ratio, *SIGNAL processing, *MATHEMATICAL optimization, *BEAMFORMING
Abstract

In this paper, we investigate a max–min weighted signal-to-interference-plus-noise-ratio (SINR) problem in a full-duplex multiuser multiple-input-multiple-output system, where a full-duplex-capable base station (BS) equipped with multiple antennas communicates with multiple half-duplex downlink and uplink users under the same system resources. Specifically, we consider a practical scenario where the downlink minimum weighted SINR is maximized under specific SINR constraints for uplink users. Moreover, the optimization is conducted by jointly considering the BS transmit power, the transmit power of uplink users, and BS transmit and receive beamforming. This optimization problem is, therefore, subject to multiple uplink SINR constraints and multiple transmit power constraints. Due to the SINR constraints, negative matrix components arise and hence the optimization problem cannot be directly solved by the standard approach, i.e., Perron–Frobenius theory. We have provided an explicit iterative scheme to solve this joint optimization problem with a strict proof. The proposed algorithm is proved to converge to Karush–Kuhn–Tucker points. Simulation results show that our proposed algorithm has a fast convergence rate and leads to a better performance compared with other optimization techniques that do not jointly consider all parameters. [ABSTRACT FROM PUBLISHER]

Published
2017
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45. Full-duplex OFDMA multi-user cellular systems: resource allocation and user pairing.

Author

Jiang, Yunxiang, Chen, He (Henry), Lau, Francis C.M., Wang, Peng, and Li, Yonghui

Subjects
RESOURCE allocation, ORTHOGONAL frequency division multiplexing, CELL phone systems, COMMUNICATION, ALGORITHMS
Abstract

In this paper, we consider an orthogonal frequency division multiple access multi-user cellular system with one full-duplex base station communicating with multiple half-duplex users in a bidirectional way. The uplink and downlink transmissions are coupled together because of the existence of the self-interference at the base station and the inter-user interference (IUI) from the uplink users to the downlink users. We aim to maximize the system sum-rate of uplink and downlink transmissions by optimally pairing the uplink and downlink users and allocating the subcarriers and powers to these users. We formulate the problem as a mixed integer nonlinear programming problem. A two-layer iterative solution based on the dual method and the sequential parametric convex approximation (SPCA) method is proposed. It is referred to as the dual-SPCA algorithm. The dual-SPCA algorithm requires the IUI channel state information to be available at the base station, and hence, a significant overhead is generated. To reduce the amount of overhead required, we assume that the IUI channel model is known at the base station, and we design a location-aware resource allocation algorithm with limited channel state information that maximizes the system sum-rate. Simulation results show that when self-interference is low, uplink and downlink user-pairing can provide significant improvement on the system sum-rate compared with the conventional unidirectional half-duplex transmission. In addition, by considering two different network deployments, such as urban macro cell scenario and small cell scenario, we show that the improvement of full-duplex transmission over half-duplex transmission highly depends on the channel parameters. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2017
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