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Chinese Automation Congress

作者： Rongqing Meng Xingke Liu Zhichao Song Xiaogang Qiu College of Information System and Management National University of Defense Technology Science and Technology on Complex Aviation System Simulation Laboratory

ISBN: (纸本)9781467371902

Training simulation is broadly used in military training but not limited. The simulation environment contains so many elements and so many factors affect the result, so an effective and efficient mechanism to help to manage these factors is required. This article firstly listes the elements in the environment, and then builds the object models of all kinds of objects. Based on these object models, the experiment frame is designed. Finally, a simple case study is given. According to the actual application, these models and frame facilitate the experiment management and help the analysts to analyze the simulation result.

关键词： Training simulation Model Based Management and Control of simulation

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Mitigating Over-Trust in Chat Companion Robot Interaction Using Augmented Reality 4

Mitigating Over-Trust in Chat Companion Robot Interaction Us...

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4th International Conference on Artificial Intelligence and Computer Engineering, ICAICE 2023

作者： Wang, Guobao Zhao, Changshun Liu, Ying He, Di Wang, Yuqing Zhang, Kaiyue Yanshan University Hebei Qinhuangdao China Jiangsu Xuzhou Construction Machinery Group Co. Ltd. Jiangsu Xuzhou221004 China Officers College of Pap Sichuan Chengdu China National Key Laboratory for Complex Systems Simulation Beijing China University of Electronic Science and Technology of China Sichuan Chengdu China Jiangsu Province Tongshan Secondary Vocational School Jiangsu Tongshan China

ISBN: (纸本)9798400708831

This study aims to explore the effects of different human-machine interfaces, system performance, and robot interaction modalities on over-trust in chat companion robot systems. We designed and implemented three types of interfaces: 2D Virtual Interface + Virtual Robot, 3D Augmented Reality Interface + AR-based Virtual Robot, and 3D Real World + NAO Physical Robot. We also manipulated the system performance (high or low) and the robot interaction modality (language, gesture, or both). We conducted a user study with 30 participants, who interacted with the chat companion robot under different conditions and rated their trust, distrust, and human-robot distance. We also measured the user experience in terms of usefulness and ease of use. The results showed that the type of interface significantly influenced the trust, distrust, and human-robot distance of the users, and that the 3D augmented reality interface was the most effective in enhancing trust and reducing distrust and distance. The performance of the system also affected the trust and distance of the users, and the gesture interface was the most sensitive to the performance variation. The modality of the interaction did not have a significant impact on the dependent variables. The user experience ratings also indicated that the 3D augmented reality interface was the most useful and easy to use. The implications and limitations of these findings are discussed in the paper. © 2023 ACM.

关键词： Augmented reality

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Electrical and mechanical performance of graphene sheets exposed to oxidative environments

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Nano Research 2013年第7期6卷 485-495页

作者： Mario Lanza Yan Wang Teng Gao Albin Bayerl Marc Porti Montserrat Nafria Yangbo Zhou Guangyin Jing Yanfeng Zhang Zhongfan Liu Dapeng Yu Huiling Duan State Key Laboratory for Turbulence and Complex System Department of Mechanics and Aerospace Engineering CAPT College of Engineering Peking University Beijing 100871 China Beijing Aeronautical Science and Technology Research Institute Beijing 10221 I China Center for Nanochemistry (CNC) Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry and Molecular Engineering Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 China Electronic Engineering Department Universitat Autonoma de Barcelona Cerdanyola del Valles 08193 Spain Department of Physics State Key Laboratory for Mesoscopic Physics Peking University Beijing 100871 China Physics Department Northwest University Xi'an 710069 China

Graphene coatings have been shown to protect the underlying material from oxidation when exposed to different media. However, the passivating properties of graphene in air at room temperature, which corresponds to the operating conditions of many electronic devices, still remain undear. In this work, we analyze the oxidation kinetics of graphene/Cu samples in air at room temperature for long periods of time （from I day to 113 days） using scanning electron microscopy, conductive atomic force microscopy and Auger electron microscop3~ and we compare the results with those obtained for similar samples treated in H202. We observe that unlike the graphene sheets exposed to H202, in which the accumulation of oxygen at the graphene domain boundaries evolves in a very controlled and progressive way, the local oxidation of graphene in air happens in a disordered manner. In both cases the oxide hillocks formed at the graphene domain boundaries can propagate to the domains until reaching a limiting width and height. Our results demonstrate that the local oxidation of the underlying material along the domain boundaries can dramatically decrease the roughness, conductivity, mechanical resistance and frictional characteristics of the graphene sheet, which reduces the performance of the whole device.

关键词： graphene local oxidation domain boundary passivating layer

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Notice of Retraction: Crank block steering mechanism optimization for forklift truck based on PSO

Notice of Retraction: Crank block steering mechanism optimiz...

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International Conference on Computer Engineering and technology, ICCET

作者： Chaoli Sun Jianchao Zeng Jengshyang Pan Yuanfang Tao Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Taiyuan Shanxi China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Mechanical & Electronic Engineering College Taiyuan University of Science and Technology Taiyuan Shanxi China

This article has been retracted by the publisher.

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Measure and Predict the Receiver's Electromagnetic Susceptibility Fast

Measure and Predict the Receiver's Electromagnetic Susceptib...

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IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)

作者： Yan Chen Zhonghao Lu Bing Xie State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System College of Electronic Science National University of Defense Technology Changsha China State Key Laboratory of Astronautic Dynamics Xi'an China

Evaluating and predicting rapidly and accurately a high sensitivity receiver's adaptability in complex electromagnetic environments is a tough job. To solve this problem, a novel testing and prediction method based on dual-channel multi-frequency is proposed to improve the traditional two-tone test. An experiment performed on a radar receiver confirms the reliability of the method proposed in this paper. It shows that the interference of each harmonic frequency and each order to the receiver can be identified and predicted with the sensitivity model. Based on this, fast and comprehensive evaluation and prediction of the receiver's electromagnetic susceptibility in complex environment can be efficiently realized.

关键词： Sensitivity Receivers Interference Radar Predictive models Harmonic analysis Velocity measurement

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A Novel Barrage Repeater Jamming against SAR-GMTI

A Novel Barrage Repeater Jamming against SAR-GMTI

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European Conference on Antennas and Propagation

作者： Jingke Zhang Dahai Dai Shiqi Xing Shunping Xiao Bo Pang State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology Changsha China College of Electronic Science and Engineering National University of Defense Technology Changsha China

ISBN: (纸本)9781509022342

Synthetic aperture radar ground moving target indication (SAR-GMTI) has been extensively used in the battle field information acquiring. In this paper, a barrage repeater jamming against SAR-GMTI is proposed. This method separates the intercepted radar signal into several equal segments and reradiates them back to the radar in a rearranged order. The essence of the method is that the separation number and the rearranged order are random between each pulse. The randomicity leads to a barrage jamming in SAR images which cannot be cancelled by displace phase-center antenna (DPCA) processing. simulation results are presented to illustrate the validity of the proposed method.

关键词： synthetic aperture radar ground moving target indication (SAR-GMTI) displaced phase-center antenna (DPCA) random pulse separation and rearrangement repeater jamming

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Attributed Scattering Center Extraction With Improved Orthogonal Matching Pursuit

Attributed Scattering Center Extraction With Improved Orthog...

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2022 International Symposium on Antennas and Propagation (ISAP)

作者： Guopeng Peng Chunheng Liu Jiahui Wu Yuxiang Zhou Xing Wang Jinyong Hou Institute of System Engineering Beijing China National Key Laboratory of Science and Technology on Antennas and Microwaves Xidian University Xi’an Shaanxi China Key Laboratory of Electronic Information Countermeasure and Simulation Technology Ministry of Education Xidian University Xi’an Shaanxi China

ISBN: (数字)9781665479622

ISBN: (纸本)9781665479639

The attributed scattering center extraction is aimed to solve a high-dimensional, and highly nonlinear problem, which generates high complexity and memory requirements. To alleviate this difficulty, this paper proposes an attributed scattering center extraction method with improved orthogonal matching pursuit (OMP). Local optimization orthogonal matching pursuit (LOOMP) and alternative optimization are utilized to estimate parameters and reduce the dictionary dimension. Experimental results show that the proposed method outperforms the existing frequency-domain method in terms of runtime and memory requirements.

关键词： Dictionaries Runtime Frequency-domain analysis Memory management Matching pursuit algorithms Scattering complexity theory

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A modified SNR estimation algorithm based on singular value decomposition

A modified SNR estimation algorithm based on singular value ...

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2014 International Conference on Information and Communications Technologies (ICT 2014)

作者： Tao Wu Haixin Zheng Di Yan Shaolin Liu Science and Technology on Complex Electronic System Simulation Laboratory Academy of Equipment Beijing China Department of Optical and Electrical Equipment Academy of Equipment Beijing China Company of Postgraduate Management Academy of Equipment Beijing China School of Information and Communication Enginneering Beijing University of Posts and Telecommunications China

ISBN: (纸本)9781634392785

When the traditional SNR estimation algorithm based on singular value decomposition (SVD) is applied to the digital data analysis of spaceflight TT&C system, problem of large deviation arises. This paper analyzes the limitations of SVD, and proposes a modified singular value decomposition (MSVD) SNR estimation algorithm. Before estimating SNR by use of SVD, MSVD does some processing to whiten noise, such as band-pass, down-sampling, and up-sampling. The simulation results show that this algorithm can, within a large range, accurately estimate the actually received SNR, effectively improving the application scope of traditional algorithms.

关键词： Blind estimation PSK SNR SVD

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Advanced polarization estimation method using Spatial Polarization Characteristic of antenna

Advanced polarization estimation method using Spatial Polari...

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European Radar Conference (EURAD)

作者： Yuliang Chang Longfei Shi Jian Dong Xuesong Wang Shun Pingxiao College of Electronic Science and Engineering National University of Defense Technology Changsha China State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology Changsha China

The polarization of radar antenna vary with scan direction. This phenomenon is called Spatial Polarization Characteristic (SPC) of antenna. Based on the SPC of single polarized antenna, a novel polarization estimation method is established. Comparing with the traditional estimation method, this one has the following advantages: (i) It does not need dual-polarization channels to estimate the signal polarization; (ii) The polarization and angle of arriving(AOA) of a periodic signal can be estimated simultaneously; (iii) The full-polarization pattern of the antenna can be matched automatically during the estimation. The feasibility of this method is proved by simulation.

关键词： Radar antennas Estimation Radar Antenna measurements Multiple signal classification Directive antennas

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On the performance comparisons of several sparse reconstruction algorithms

On the performance comparisons of several sparse reconstruct...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Dou Sun Shiqi Xing Yongzhen Li Dahai Dai Bo Pang State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology Changsha China College of Electronic Science and Engineering National University of Defense Technology Changsha China

ISBN: (纸本)9781509060948

It is hard to choose one appropriate sparse reconstruction algorithm from multiple existing algorithms in different occasions. Being aware of this difficulty, four typical sparse reconstruction algorithms are studied to present comprehensive performance evaluations in terms of reconstruction accuracy, super-resolution ability and noise immunity, and it is found that the BCS algorithm performs best in noise immunity, while the Lp-norm algorithm has an outstanding performance in super-resolution ability.

关键词： Signal resolution Signal processing algorithms Image resolution Bayes methods Signal to noise ratio Compressed sensing Optimization

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