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Instability of Standing Wave for the Klein–Gordon–Hartree Equation

Acta Mathematica Sinica,English Series 2014年第5期30卷 861-871页

作者： Xiao Guang LI Jian ZHANG Yong Hong WU Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal University College of Mathematics and Software Science Sichuan Normal University Department of Mathematics and Statistics Curtin University of Technology

The instability property of the standing wave uω（t, x） = eiωtφ（x） for the Klein–Gordon– Hartree equation is investigated. For the case N≥3 and w2 〈2/N＋4-γ,it is shown that the standing wave eiwtφ（x） is... 详细信息

关键词： Klein–Gordon–Hartree equation standing waves strong instability

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High-level representation sketch for video event retrieval

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Science China(Information Sciences) 2016年第7期59卷 158-172页

作者： Yu ZHANG Xiaowu CHEN Liang LIN Changqun XIA Dongqing ZOU State Key Laboratory of Virtual Reality Technology and Systems School of Compute Science and EngineeringBeihang University School of Advanced Computing Sun Yat-Sen University

Representing video events is an essential step for a wide range of visual applications. In this paper,we propose the event sketch, a high-level event representation, to depict the dynamic properties of video events composed of actions of semantic objects. We show that this representation can facilitate a novel sketch based video retrieval(SBVR) system, which has not been considered before to the best of our knowledge. In this system, users are allowed to draw the evolutions(e.g. spatiotemporal layouts and behaviors of semantic objects)on a board, and retrieve the events whose semantic objects have the similar evolutions from a database. To do this, event sketches are constructed on both the user queries and database videos, and compared under a novel graph-matching scheme based on data-driven Monta Carlo Markov chain(DDMCMC). To test our approach, we collect a novel dataset of goal events in real soccer videos, which consists actions of multiple players and shows large variability in the evolution process of the events. Experiments on this dataset and the publicly available dataset CAVIAR demonstrated the effectiveness of the proposed approach.

关键词： video retrieval event representation event sketch drawing board distance function relevance feedback DDMCMC

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Real-time controlling of crowd paths via distance propagating

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Journal of Computational Information Systems 2012年第19期8卷 8009-8016页

作者： Wu, He Qi, Li Gang, Lei Chen, Weilong Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal University Chengdu 610068 China Digital Media Department of Sichuan Normal University Chengdu 610068 China

In this paper, we propose a novel approach for controlling of crowd paths in real-time virtual environments. The proposed algorithm focus on addressing two problems: (1) the grid-based distance propagating for controlling of crowd paths. We propose a grid-based distance propagating algorithm for controlling of crowd paths, which requires no prior knowledge of crowd and obstacles. (2) the penalty function for collision-free. We propose using the penalty function to collision-free, which incorporates safety margins around obstacle using local information. Experimental results show that the proposed algorithm could be used for real-time navigation of many moving crowd in complicated virtual environments. © 2012 Binary Information Press.

关键词： virtual reality

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New characterizations of partial orders induced by a class of non-divisible t-norms

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Soft computing 2024年第17-18期28卷 9107-9114页

作者： Liu, Zhi-Qiang Wang, Xue-Ping School of Mathematical Sciences Sichuan Normal University Chengdu610066 China Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal University Chengdu610066 China

In this article, we deal with the algebraic structures of the partial orders induced by non-divisible t-norms. We first give a condition for the partial orders induced by non-divisible t-norms being a meet semi-lattice. Then, we show the condition for the partial orders induced by right-continuous t-norms being a lattice, which is very useful for constructing new lattice structures. Finally, an illustrative example is presented. Our results go a further step towards answering the first open problem raised by Karaçal and Kesicioğlu (Kybernetika 47:300-314, 2011). © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Fuzzy logic

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Robust and efficient edge-based visual odometry

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Computational visual Media 2022年第3期8卷 467-481页

作者： Feihu Yan Zhaoxin Li Zhong Zhou State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China Institute of Computing Technology Chinese Academy ofSciencesBeijing 100190China

visual odometry,which aims to estimate relative camera motion between sequential video frames,has been widely used in the fields of augmented reality,virtual reality,and autonomous ***,it is still quite challenging for stateof-the-art approaches to handle low-texture *** this paper,we propose a robust and efficient visual odometry algorithm that directly utilizes edge pixels to track camera *** contrast to direct methods,we choose reprojection error to construct the optimization energy,which can effectively cope with illumination *** distance transform map built upon edge detection for each frame is used to improve tracking efficiency.A novel weighted edge alignment method together with sliding window optimization is proposed to further improve the *** on public datasets show that the method is comparable to stateof-the-art methods in terms of tracking accuracy,while being faster and more robust.

关键词： visual odometry(VO) edge structure distance transform low-texture

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Research on Telemedicine Technology and Implement based on virtual reality

Research on Telemedicine Technology and Implement based on V...

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2016 IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference(IMCEC 2016)

作者： Hong Ji Jing Wang Jia Gao Xiaohui Liu Virtual Reality Department Beijing Computing Center Beijing Key Laboratory of cloud computing key technology and application

ISBN: (纸本)9781509001668

This paper researched the key technologies and implementation methods of virtual telemedicine,in which the virtual reality,Cloud computing,Communication and modern medical technologies are comprehensively *** virtual telemedicine is different from traditional medical which is out of the constraints of time and *** cloud architecture technology to design a remote cooperative medical application system based on virtual reality technology,which ensure that the medical diagnostic information could be presented and reproduced by 3D visualization models,and the system is crossplatform,many people sharing,synergetic and *** sharing and remote rapid consultation are implemented through remote real-time multiplayer sharing diagnosis based on 3D human anatomy model information,which use of cloud computing,secure communication,virtual reality technology and medical equipment to share data,text,voice and image data.

关键词： Telemedicine virtual reality collaborative diagnosis and treatment Share 3D Scene

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Business process reengineering for better sale of china lubricant enterprises

Business process reengineering for better sale of china lubr...

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5th International Conference on Computational Intelligence and Communication Networks, CICN 2013

作者： Li, Cong Feng, Lin Ma, Li Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal University Chengdu China Library Sichuan Normal University Chengdu China

ISBN: (纸本)9780768550695

With the rapid development of new economy, China lubricant enterprises urgently need to implement effective Customer Relationship Management (CRM) to win the market. By constructing and applying CRM, lubricant enterprises can keep their old customers and find potential customers, so the profit and core competitive power of lubricant enterprises can all be increased. In this paper we optimized the traditional sales process of China lubricant enterprises, designed a new business process reengineering (BPR) and built a pyramid model of CRM application tactics. The new BPR can be helpful for effectively CRM implementation of China lubricant enterprises. © 2013 IEEE.

关键词： Sales

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Optimal Control Policy of M/G/1 Queueing System with Delayed Randomized Multiple Vacations Under the Modified Min(N,D)-Policy Control

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Journal of the Operations Research Society of China 2023年第4期11卷 857-874页

作者： Le Luo Ying-Hui Tang Miao-Miao Yu Wen-Qing Wu School of Mathematical Sciences Sichuan Normal UniversityChengdu610068SichuanChina Nanchong Vocational and Technical College Nanchong637000JiangsuChina Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal UniversityChengdu610068SichuanChina

Based on the number of customers and the server’s workload,this paper proposes a modified Min(N,D)-policy and discusses an M/G/1 queueing model with delayed randomized multiple vacations under such a *** the well-known stochastic decomposition property of the steady-state queue size,the probability generating function of the steady-state queue length distribution is ***,the explicit expressions of the expected queue length and the additional queue length distribution are derived by some algebraic ***,employing the renewal reward theorem,the explicit expression of the long-run expected cost per unit time is ***,we analyze the optimal policy for economizing the expected cost and compare the optimal Min(N,D)-policy with the optimal N-policy and the optimal D-policy by using numerical examples.

关键词： M/G/1 queue Modified Min(N,D)-policy Randomized multiple vacations Queue length generating function Optimal joint control policy

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Unraveling the neural dynamics of mathematical interference in english reading: A novel approach with deep learning and fNIRS data

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Brain Research Bulletin 2025年 227卷 111398-111398页

作者： Zhijie Liang Ling Wang Jianyu Su Bo Sun Daifa Wang Juan Yang School of Computer Science Sichuan Normal UniversityChengdu 610066 China Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Chengdu 610066 China College of Foreign Languages Sichuan Normal UniversityChengdu 610066 China School of Biological Science and Medical Engineering Beihang University Beijing 100083 China

English has emerged as the predominant global language, driving efforts to optimize its acquisition through interdisciplinary cognitive research. While behavioral studies suggest a link between English learning and mathematical cognition, the neural mechanisms underlying this relationship remain poorly understood. To bridge this gap, the present study employs functional near-infrared spectroscopy (fNIRS) to construct a novel dataset on mathematical interference in English acquisition. Utilizing this dataset, a novel deep learning model named AC-LSTM is proposed, amalgamating Transformer and LSTM architectures to identify residual mathematical cognition during the English learning process. The AC-LSTM model achieves an exceptional accuracy rate of 99.8 %, surpassing other machine learning and deep learning models. Moreover, a multi-class classification experiment is conducted to discern algebra, geometry, and quantitative reasoning interference, with the AC-LSTM model achieving the highest accuracy of 75.9 % in this classification task. Furthermore, crucial brain channels for interference detection are pinpointed through grid search, and alterations in vital brain regions (R-Broca and L-Broca) are unveiled via association rule analysis. By integrating fNIRS, deep learning, and data mining techniques, this study delves into cognitive interference in English learning, providing valuable insights for educational neuroscience and data mining research.

关键词： Deep Learning FNIRS English Language Learners Mathematical Interference Data Mining

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Perceptual Evaluation Based on WOA-BP Neural Network 2

Perceptual Evaluation Based on WOA-BP Neural Network

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2nd International Conference on Artificial Intelligence and Intelligent Information Processing, AIIIP 2023

作者： Juanni, Jiao Yong, Zheng Wei, Li College of Computer Science Sichuan Normal University Chengdu China Sichuan Normal University Visual Computing and Virtual Reality Key Laboratory of Sichuan Chengdu China

ISBN: (纸本)9798350371451

In modern society, various patterns play an indispensable role. With the help of computer technology, the efficiency of designers in the field of pattern design has been significantly improved. However, in the process of pattern design, we often only rely on the subjective experience of designers, while ignoring the personal preferences of consumers. In order to explore the relationship between different pattern designs and consumers' perceptual evaluation, the Kansei engineering theory is first employed to capture consumers' perceptual evaluation of the patterns. Subsequently, various pattern designs and consumers' perceptual evaluation were utilized as inputs and outputs for the WOA-BP neural network, thereby constructing an intelligent model capable of predicting consumers' perceptual evaluation of different pattern designs. The experimental results demonstrate that the model has a highly accurate prediction level. With this model, designers can quickly adjust the pattern design to better meet the aesthetic needs of today's consumers. © 2023 IEEE.

关键词： Professional aspects

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