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2011 International Conference on Informatics,Cybernetics,and Computer Engineering(ICCE 2011)

作者： Wang Su Du Junping Gao Tian Beijing Key Lab of Intelligent Telecommunication Software and Multimedia Beijing University of Posts and Telecommunications

ISBN: (纸本)9783642251870

Most previous IE(IE) work relys on the analysis of the DOM tree of HTML *** hundreds of information sources need to be extracted in a specific domain like news,it will lead to decreased *** on the features of news articles,this paper proposed a new way to get news content desired by washing noise information and text group *** experiment proved the effectiveness of the algorithm.

关键词： Information Extraction(IE) information washing text analysis News

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CM-Droid: Secure Container for Android Password Misuse Vulnerability

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Computers, Materials & Continua 2019年第4期59卷 181-198页

作者： Wen Zhang keyue Li Tianyang Li Shaozhang Niu Zhenguang Gao Beijing Key Lab of Intelligent Telecommunication Software and Multimedia Beijing University of Posts and TelecommunicationsBeijing100876China Department of Computer Science Framingham State University100 State StFraminghamMassachusettsMA 01702USA

Android applications are associated with a large amount of sensitive data,therefore application developers use encryption algorithms to provide user data encryption,authentication and data integrity ***,application developers do not have the knowledge of cryptography,thus the cryptographic algorithm may not be used *** a result,security vulnerabilities are *** on the previous studies,this paper summarizes the characteristics of password misuse vulnerability of Android application software,establishes an evaluation model to rate the security level of the risk of password misuse vulnerability and develops a repair strategy for password misuse *** on this basis,this paper designs and implements a secure container for Android application software password misuse vulnerability:CM-Droid.

关键词： Password misuse evaluation model secure container dynamic repair

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Trusted Data Acquisition Mechanism for Cloud Resource Scheduling Based on Distributed Agents

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China Communications 2011年第6期8卷 108-116页

作者：李小勇杨月华 Beijing Key Lab of Intelligent Telecommunication Software and Multimedia Beijing University of Posts and Telecommunications

Goud computing is a new paradigm in which dynamic and virtualized computing resources are provided as services over the Internet. However, because cloud resource is open and dynamically configured, resource allocation and scheduling are extremely important challenges in cloud infrastructure. Based on distributed agents, this paper presents trusted data acquisition mechanism for efficient scheduling cloud resources to satisfy various user requests. Our mechanism defines, collects and analyzes multiple key trust targets of cloud service resources based on historical information of servers in a cloud data center. As a result, using our trust computing mechanism, cloud providers can utilize their resources efficiently and also provide highly trusted resources and services to many users.

关键词： cloud computing trusted computing distributed agent resource scheduling

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Attention-Guided Motion Estimation for Video Compression 12th

Attention-Guided Motion Estimation for Video Compression

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12th International Conference on Image and Graphics, ICIG 2023

作者： Zhang, Siru Duan, Pengrui Beijing Key Lab of Intelligent Telecommunication Software and Multimedia Beijing China Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9783031463044

Video compression is the crucial technology of video representation, transmission, and storage. Recently, learnable video compression has received great attention from both industry and research, as a result of the potential of neural networks. More and more researchers are developing learned-based video compression frameworks and methods. Obviously, how to represent the motion information in the video is one of the essential questions across all of the end-to-end video compression methods. A robust and efficient motion representation could help the method compress the video better. In this paper, we propose the Attention-guided motion encoder (AME) to get a compact motion representation. The proposed method uses attention to guide the network in exploring the relationship between frames. Meanwhile, the proposed method leverages the multi-scale features to realize a coarse-to-fine mechanism, which will make the network compress the temporal information without losing the crucial spatial information. Furthermore, video compression not only needs better performance but also costs fewer computation resources. From the results of experiments, the proposed model outperforms existing learned and conventional video codecs on UVG, MCL-JCV, and HEVC Standard Test Sequences in PSNR and MS-SSIM, meanwhile, the proposed method also brings better improvement for each parameter. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Image compression

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A novel hybrid apporach based on normalized color spaces and 2DPCA for color face recognition

A novel hybrid apporach based on normalized color spaces and...

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2010 3rd International Congress on Image and Signal Processing, CISP 2010

作者： Chen, Shangyou Sun, Yanfeng Yin, Baocai Song, Caifang Beijing Municipal Key Lab. of Multimedia and Intelligent Software Technology Beijing University of Technology Beijing China

ISBN: (纸本)9781424465149

Recently, in a task of face recognition, some researchers proposed a novel method called color space normalization (CSN) which can enhance the discriminating power of color spaces for color face recognition. This method can significantly reduce the correlation between the three color components RGB and thus can enhance the discriminating power of the concatenated color component RGB. This offers an intrinsic (or internal) reason for why the CSN techniques can improve the face recognition performance. The three color component images of normalized color spaces are concatenated into one pattern vector, then PCA+FLD is performed on the concatenated pattern vector. But the concatenated pattern vector based on PCA destroyed the overall structure of each pixel in image. Some local structure information may be ignored. While 2DPCA preserves the overall structure information well and eliminates the small sample problem on a certain extent. Therefore, in this paper, color space normalization was combined with 2DPCA for color face recognition. This CSN based 2DPCA was performed and compared with PCA, 2DPCA for color face recognition. Numerous experiments show that the proposed approach has better recognition performance than other traditional PCA-based methods for color face recognition. ©2010 IEEE.

关键词： Color

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A Q-learning-based decision making scheme for application reconfiguration in sensor networks

A Q-learning-based decision making scheme for application re...

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11th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2007

作者： Zhang, Dongmei Ma, Huadong Beijing Key Lab. of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)1424409632

Application reconfiguration is a principal method of improving the application flexibility and adaptability to dynamic environment in sensor networks. Motivated by this, we propose a novel Q-learning-based decision making scheme in sensor networks to support the environment adaptive reconfiguration decision. In this scheme, we introduce the rule-based reasoning to predict the trend of environmental change and make reconfiguration decision adaptively. In particular, we apply a real-time reinforcement learning algorithm, called Q-learning, to evaluate the certainty value of the rules in this decision mechanism. Moreover, we map the continuous state space of environment condition into a discrete and finite state space to design a certainty function. The simulation results show that the Q-learning-based decision mechanism can not only learn the change of environment, but also effectively make the reconfiguration decision in sensor networks. ©2007 IEEE.

关键词： Decision making

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Color face recognition based on color space normalization and quaternion matrix representation

Color face recognition based on color space normalization an...

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4th International Conference on Digital Home, ICDH 2012

作者： Jia, Huajie Wang, Lichun Sun, Yanfeng Hu, Yongli Beijing Municipal Key Lab. of Multimedia and Intelligent Software Technology Beijing University of Technology Beijing China

The color face recognition method using quaternion matrix representation is based on RGB color space which is a fundamental and widely used space. However, the RGB color space is a relatively weak color space for face recognition due to the strong correlation between the three color channels. A technique named color space normalization (CSN) technique can reduce the correlation between the three channels of the RGB color space, and enhance the discriminating power of the normalized color space RGB-N. Therefore, in this paper, a method based on normalized color space RGB-N and quaternion matrix representation is firstly proposed. The proposed method not only has the advantage of quaternion matrix representation model, but also has the strong discriminating power due to CSN. The experiments in this paper are performed on the FERET color face database. Compared with the method based on RGB color space and quaternion matrix representation, the proposed approach in this paper can enhance the recognition rate. © 2012 IEEE.

关键词： Face recognition

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Cluster-to-cluster overlay network for video systems over wireless ad hoc networks

Cluster-to-cluster overlay network for video systems over wi...

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2011 7th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2011

作者： Zhang, Haiyang Beijing Key Lab. of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications BeiJing China

ISBN: (纸本)9780769546100

In current years, application layer overlay networks have become a popular solution for video streaming delivering. Ad Hoc networks are composed of mobile nodes without any fundamental structure, these mobile nodes dynamically construct temporary network to communicate with each other. So, the irrelevant fundamental structure feature of overlay network is suitable for Ad Hoc networks. However, Ad Hoc networks exists several fundamental problems, including large dynamic of nodes and links, the unstable bandwidth between nodes, high transferring delay and limited energy. In this paper, we propose a Cluster-to-Cluster overlay network (C2C), which clusters the nodes into some clusters with a weight degree-based clustering algorithm, considering the forwarding and transmitting ability, energy of the node and the distance between nodes, the clusters are constructed into multi-link mesh-based structure, and in the cluster, the nodes are organized with probe forwarding mesh-based algorithm. The simulation results demonstrate the C2C overlay network can achieve less delay and transmitting cost than tree-based, mesh-based and hybrid based overlay networks in high unstable Ad Hoc networks. © 2011 IEEE.

关键词： Overlay networks

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Feedback-based error tracking for AVS-M

Feedback-based error tracking for AVS-M

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2009 2nd International Congress on Image and Signal Processing, CISP'09

作者： Conghui, Shi Yunhui, Shi Baocai, Yin Beijing Key Lab. of Multimedia and Intelligent Software Technology Beijing University of Technology Beijing 100124 China

ISBN: (纸本)9781424441310

AVS-M is a video encoding standard used for mobile video in wireless environment, developed by the Audio and Video Coding Standard Working Group of China. In order to cope with the burst error in error-prone wireless networks, in this paper, we present an error tracking mechanism, which utilizing a feedback channel to judge which areas are contaminated by the prediction from its preceding frames. Through this positioning, we can terminate the error propagation effects by INTRA refreshing the affected areas. Simulations demonstrate that the proposed algorithm can effectively stop the quality degradation and not cause much bit-rate increase. ©2009 IEEE.

关键词： Video signal processing

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A push-based paradigm for environment adaptive application reconfiguration in clustered sensor networks

A push-based paradigm for environment adaptive application r...

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2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, MASS

作者： Liang, Liu Huadong, Ma Dan, Tao Dongmei, Zhang Beijing Key Lab. of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)1424405076

Application reconfiguration is essential in order to complement the flexibility and adaptability for sensor networks in the environment monitoring domain. In this paper, we first describe an effective Environment Adaptive Application Reconfiguration (EAAR) mechanism. Then we present a push-based paradigm to carry out EAAR, where instead of a pull-based paradigm proposed in our prior work. This paradigm suits for clustered sensor networks, which provides a software entity, reconfiguration agent, to perform the process of reconfiguration on cluster head nodes. Reconfiguration agent is a novel concept, and has great potential in providing energy-efficient reconfiguration processing with low latency. A prototype is constructed to show the workflow of reconfiguration agent. Particularly, we design two metrics: execution time and energy consumption, and use the simulation platform to quantitatively measure the performance of different paradigms in the reconfiguration procedure. Experimental results show that push-based paradigm performs better than pull-based one. © 2006 IEEE.

关键词： Sensor networks

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