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Displaying 1-50 out of 70 total
System forecast locking in collaborative pattern design
Found in: International Conference on Computer Supported Cooperative Work in Design
By Jiajun Bu, Jianxv Yang, Chun Chen, Bo Jiang
Issue Date:May 2005
pp. 74-78 Vol. 1
Locking is a common technique in distributed editing system used to prevent conflicting, maintain user intention and result consistency. Collaborative pattern design system is a special class, thus has special locking scheme. A novel scheme system forecast...
 
Interpreting the Public Sentiment Variations on Twitter
Found in: IEEE Transactions on Knowledge and Data Engineering
By Shulong Tan,Yang Li,Huan Sun,Ziyu Guan,Xifeng Yan,Jiajun Bu,Chun Chen,Xiaofei He
Issue Date:May 2014
pp. 1-1
Millions of users share their opinions on Twitter, making it a valuable platform for tracking and analyzing public sentiment. Such tracking and analysis can provide critical information for decision making in various domains. Therefore it has attracted att...
 
D2: Anomaly Detection and Diagnosis in Networked Embedded Systems by Program Profiling and Symptom Mining
Found in: 2013 IEEE 34th Real-Time Systems Symposium (RTSS)
By Wei Dong,Chun Chen,Jiajun Bu,Xue Liu,Yunhao Liu
Issue Date:December 2013
pp. 202-211
Detecting and diagnosing anomalies in networked embedded systems like sensor networks is a very difficult task, due to the variable workloads and severe resource constraints. We notice that most node-level debugging tools can provide detailed program infor...
 
Reprogramming over Low Power Link Layer in Wireless Sensor Networks
Found in: 2013 IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems (MASS)
By Yi Gao, Chun Chen, Xue Liu, Jiajun Bu, Wei Dong, Xianghua Xu
Issue Date:October 2013
pp. 461-469
Reprogramming over the air is important for maintaining a wireless sensor network. Traditional reprogramming approaches assume always-on link layers. Given the energy limitation of sensor nodes, always-on link layers are often not desired for most sensor n...
 
R2: Incremental Reprogramming Using Relocatable Code in Networked Embedded Systems
Found in: IEEE Transactions on Computers
By Wei Dong,Yunhao Liu,Chun Chen,Jiajun Bu,Chao Huang,Zhiwei Zhao
Issue Date:September 2013
pp. 1837-1849
We present R2, an incremental reprogramming approach using relocatable code, to improve program similarity for efficient incremental reprogramming in networked embedded systems. R2 achieves a higher degree of similarity than existing approaches by mitigati...
 
Semi-Supervised Nonlinear Hashing Using Bootstrap Sequential Projection Learning
Found in: IEEE Transactions on Knowledge and Data Engineering
By Chenxia Wu,Jianke Zhu,Deng Cai,Chun Chen,Jiajun Bu
Issue Date:June 2013
pp. 1380-1393
In this paper, we study the effective semi-supervised hashing method under the framework of regularized learning-based hashing. A nonlinear hash function is introduced to capture the underlying relationship among data points. Thus, the dimensionality of th...
 
Exploiting Concurrency for Efficient Dissemination in Wireless Sensor Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Yi Gao, Jiajun Bu, Wei Dong, Chun Chen, Lei Rao, Xue Liu
Issue Date:April 2013
pp. 691-700
Wireless sensor networks (WSNs) can be successfully applied in a wide range of applications. Efficient data dissemination is a fundamental service which enables many useful high-level functions such as parameter reconfiguration, network reprogramming, etc....
 
Handauth: Efficient Handover Authentication with Conditional Privacy for Wireless Networks
Found in: IEEE Transactions on Computers
By Daojing He,Jiajun Bu,Sammy Chan,Chun Chen
Issue Date:March 2013
pp. 616-622
Existing mechanisms for handover authentication mainly focus on designing a secure authentication module, little attention has been paid to protect users' privacy when they are authenticated by the access points for data access. Further, most existing appr...
 
Locally Discriminative Coclustering
Found in: IEEE Transactions on Knowledge and Data Engineering
By Lijun Zhang, Chun Chen, Jiajun Bu, Zhengguang Chen, Deng Cai, Jiawei Han
Issue Date:June 2012
pp. 1025-1035
Different from traditional one-sided clustering techniques, coclustering makes use of the duality between samples and features to partition them simultaneously. Most of the existing co-clustering algorithms focus on modeling the relationship between sample...
 
Video stabilization with a depth camera
Found in: 2012 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
By Shuaicheng Liu, Yinting Wang, Lu Yuan, Jiajun Bu, Ping Tan, Jian Sun
Issue Date:June 2012
pp. 89-95
Previous video stabilization methods often employ homographies to model transitions between consecutive frames, or require robust long feature tracks. However, the homography model is invalid for scenes with significant depth variations, and feature point ...
 
Large-scale Outdoor Scene Classification by Boosting a Set of Highly Discriminative and Low Redundant Graphlets
Found in: Data Mining Workshops, International Conference on
By Luming Zhang,Mingli Song,Xiaoyu Deng,Jiajun Bu,Chun Chen
Issue Date:December 2011
pp. 847-852
Large-scale outdoor scene classification is an important issue in multimedia information retrieval. In this paper, we propose an efficient scene classification model by integrating outdoor scene image's local features into a set of highly discriminative an...
 
Link quality aware code dissemination in wireless sensor networks
Found in: Network Protocols, IEEE International Conference on
By Wei Dong,Yunhao Liu,Chao Wang,Xue Liu,Chun Chen,Jiajun Bu
Issue Date:October 2011
pp. 89-98
Wireless reprogramming is a crucial technique for software deployment in wireless sensor networks (WSNs). Code dissemination is a basic building block to enable wireless repro-gramming. We present ECD, an Efficient Code Dissemination protocol leveraging 1-...
 
Exploiting concurrency for efficient dissemination in Wireless Sensor Networks
Found in: Distributed Computing in Sensor Systems and Workshops, International Conference on
By Yi Gao, Jiajun Bu, Wei Dong, Chun Chen, Lei Rao, Xue Liu
Issue Date:June 2011
pp. 1-8
Wireless Sensor Networks (WSNs) can be successfully applied in a wide range of applications. Efficient data dissemination is a fundamental service which enables many useful high-level functions such as parameter reconfiguration, network reprogramming, and ...
 
Jumping Scanning Path Error Diffusion: A Novel Halftoning Algorithm Improving Mid-tone Quality
Found in: Digital Media and Digital Content Management, Workshop on
By Yan Zhou, Chun Chen, Qiang Wang, Jiajun Bu
Issue Date:May 2011
pp. 215-222
In this paper, we describe a novel error diffusion scheme for higher halftone quality with less visual artifacts. The proposed algorithm improves mid-tone quality of error diffusion significantly by diffusing the error along a jumping scanning path. The al...
 
SenSpire OS: A Predictable, Flexible, and Efficient Operating System for Wireless Sensor Networks
Found in: IEEE Transactions on Computers
By Wei Dong,Chun Chen,Xue Liu,Yunhao Liu,Jiajun Bu,Kougen Zheng
Issue Date:December 2011
pp. 1788-1801
The development of a modern sensor network is difficult because of the long-term unattended operation mode, diverse application requirements, and stringent resource constraints. To address these issues, we present SenSpire OS, a predictable, flexible, and ...
 
Active Learning Based on Locally Linear Reconstruction
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Lijun Zhang,Chun Chen,Jiajun Bu,Deng Cai,Xiaofei He,Thomas S. Huang
Issue Date:October 2011
pp. 2026-2038
We consider the active learning problem, which aims to select the most representative points. Out of many existing active learning techniques, optimum experimental design (OED) has received considerable attention recently. The typical OED criteria minimize...
 
A Lightweight and Density-Aware Reprogramming Protocol for Wireless Sensor Networks
Found in: IEEE Transactions on Mobile Computing
By Wei Dong, Chun Chen, Xue Liu, Jiajun Bu, Yi Gao
Issue Date:October 2011
pp. 1403-1415
We propose ReXOR, a lightweight and density-aware reprogramming protocol for wireless sensor networks using XOR. It employs XOR encoding in the retransmission phase to reduce the communication cost. In sparse and lossy networks, it delivers much better per...
 
A Level-set Based Tracking Approach for Surveillance Video with Fusion and Occlusion
Found in: Image and Video Technology, Pacific-Rim Symposium on
By Chaoqun Hong, Na Li, Mingli Song, Jiajun Bu, Chun Chen
Issue Date:November 2010
pp. 156-161
Traditional level-set-based methods of tracking contours suffered from occlusion and fusion. In this paper, the proposed method introduces dynamic incident detection to find and handle occlusion and fusion. Color histogram of the hue component in HSV color...
 
Color to Gray: Attention Preservation
Found in: Image and Video Technology, Pacific-Rim Symposium on
By Yezhou Yang, Mingli Song, Jiajun Bu, Chun Chen, Cheng Jin
Issue Date:November 2010
pp. 337-342
In this paper, we propose an approach to preserve a crucial visual cue in color to grayscale transformation: attention. The main contributions are three folds: 1) preserving visual attention is more biological plausible than preserving other low level cues...
 
A Metric for Measuring Members' Contribution to Information Propagation in Social Network Sites
Found in: Conference, International Asia-Pacific Web
By Jiajia Zheng, Wei Chen, Lijun Zhang, Jiajun Bu, Chun Chen
Issue Date:April 2010
pp. 392-394
The phenomenon of propagation is universal in our daily life. For example, infectious diseases can be transmitted from one person to another, hot news is disseminated widely on the Internet, and classic passages written by the popular users can be shared b...
 
Intelligent Advertising for User Generated Content through Sentiment Analysis
Found in: Social Network Analysis and Mining, International Conference on Advances in
By Guang Qiu, Jiajun Bu, Chun Chen, Feng Zhang
Issue Date:July 2009
pp. 330-333
The tradeoff between revenue and market share triggers the emergence of targeted advertising. However, all previous related work only focuses on the topical relevance of ads and does not concern the attitudes of consumers. In our paper, we propose a novel ...
 
SDSPM-based user interest prediction in collaborative graphics design systems under ubiquitous environment
Found in: International Conference on Computer Supported Cooperative Work in Design
By Bo Jiang, Jian Zhou, Jiajun Bu
Issue Date:April 2009
pp. 414-419
Rapid advances in the enabling technologies for mobile and ubiquitous computing help portable devices to join collaborative graphics design conveniently. The limitation of display size and computational power of these embedded devices makes it hard for mob...
 
A Novel Approach to Keyword Extraction for Contextual Advertising
Found in: Intelligent Information and Database Systems, Asian Conference on
By Feng Zhang, Guang Qiu, Jiajun Bu, Mingcheng Qu, Chun Chen
Issue Date:April 2009
pp. 51-56
Online advertising has now turned to be one of the major revenue sources for today's Internet companies. Among the different channels of advertising, contextual advertising takes the great part. There are already lots of studies done for the keyword extrac...
 
FIT: A Flexible, Lightweight, and Real-Time Scheduling System for Wireless Sensor Platforms
Found in: IEEE Transactions on Parallel and Distributed Systems
By Wei Dong, Chun Chen, Xue Liu, Kougen Zheng, Rui Chu, Jiajun Bu
Issue Date:January 2010
pp. 126-138
We propose FIT, a flexible, lightweight, and real-time scheduling system for wireless sensor platforms. There are three salient features of FIT. First, its two-tier hierarchical framework supports customizable application-specific scheduling policies, henc...
 
A Real-Time Approach of Level-Set-Based Contour Tracking for Accurate Foreground Extraction
Found in: Computer Science and Information Engineering, World Congress on
By Chaoqun Hong, Zhi Yang, Jiajun Bu, Chun Chen, Xiaoyu Deng
Issue Date:April 2009
pp. 596-600
Real-time contour tracking in video surveillance suffers the problem of low speed and influence of shadows and noises. In this paper, a novel approach of video tracking is proposed, which employs a faster level-set-based method and a foreground extracting ...
 
Media Browsing for Mobile Devices Based on Resolution Adaptive Recommendation
Found in: Communications and Mobile Computing, International Conference on
By Yi Liu, Zhi Yang, Xiaoyu Deng, Jiajun Bu, Chun Chen
Issue Date:January 2009
pp. 285-290
This paper presents a system to facilitate the mobile devices to browse and retrieve video clips from a large amount of media contents. The media server in the proposed system is capable of recommending video clips to users that is adapt to their resolutio...
 
A Dynamic Time Synchronization Scheme for Multihop Sensor Networks
Found in: Young Computer Scientists, International Conference for
By Wei Dong, Chun Chen, Jiajun Bu, Kougen Zheng, Xiaofan Wu, Guodong Teng
Issue Date:November 2008
pp. 582-587
Time synchronization plays a crucial role in many sensor network applications. Existing time synchronization methods proposed in the literature mainly focus on reducing single-hop (pair-wise) uncertainties to improve synchronization accuracy. Based on this...
 
A Kernel Based Algorithm for Fast Color-to-Gray Processing
Found in: Image and Signal Processing, Congress on
By Yi Zhang, Chun Chen, Jiajun Bu, Mingli Song, Chen Pang, Zhuo Sun
Issue Date:May 2008
pp. 451-455
Color-to-gray is a classical manipulation in image processing. In this paper, a kernel based method is presented to carry out color-to-gray operation. It is noticeable that, in a meaningful color image only the linear combination of the three color compone...
 
An Effective Feature-Weighting Model for Question Classification
Found in: Computational Intelligence and Security, International Conference on
By Peng Huang, Jiajun Bu, Chun Chen, Guang Qiu
Issue Date:December 2007
pp. 32-36
Question classification is one of the most important sub- tasks in Question Answering systems. Now question tax- onomy is getting larger and more fine-grained for better answer generation. Many approaches to question classifi- cation have been proposed and...
 
Learning a Flexible Question Classifier
Found in: Convergence Information Technology, International Conference on
By Peng Huang,Jiajun Bu,Chun Chen,Guang Qiu,Lijun Zhang
Issue Date:November 2007
pp. 1608-1613
To generate high quality answers, many question tax- onomies designed for modern question answering systems are getting more and more complex and fine-grained. Fur- thermore, without concrete context some questions are am- biguous and are difficult to be c...
 
User Modeling for Recommendation in Blogspace
Found in: Web Intelligence and Intelligent Agent Technology, International Conference on
By Kangmiao Liu, Wei Chen, Jiajun Bu, Chun Chen, Lijun Zhang
Issue Date:November 2007
pp. 79-82
Weblogs (also known as blogs) have become a key tool not only for individuals to publish posts, but also for obtaining useful information on a daily basis. Compared with traditional Internet services, there is much more personalized information in blogspac...
 
A Hybrid Model for Web Image Annotation
Found in: Convergence Information Technology, International Conference on
By Peng Huang,Jiajun Bu,Chun Chen,Kangmiao Liu,Wei Chen
Issue Date:November 2007
pp. 189-194
Retrieving images in response to textual queries requires some knowledge of the semantic of images. Accordingly, an efficient image annotation and retrieval system is highly desired for this purpose. However, current image annota- tion technique is not sat...
 
Automatic Query Type Classification for Web Image Retrieval
Found in: Multimedia and Ubiquitous Engineering, International Conference on
By Keke Cai, Jiajun Bu, Chun Chen, Peng Huang
Issue Date:April 2007
pp. 1021-1026
In this paper, a framework of query classification is proposed for text-based image retrieval. The classification process in this framework consists of three phases. In the first phase, two basic classifiers are employed to classify the image query into ce...
 
Facial Animation System for Embedded Application
Found in: Embedded Software and Systems, Second International Conference on
By Jiajun Bu, Mingyu You, Chun Chen
Issue Date:December 2005
pp. 310-315
This paper describes a prototype implementation of a speech driven facial animation system for embedded devices. The system is comprised of speech recognition and talking head synthesis. A context-based visubsyllable database is set up to map Chinese initi...
 
Fast predictive variable-block-size motion estimation for H.264/AVC
Found in: Multimedia and Expo, IEEE International Conference on
By Zhi Yang, Jiajun Bu, Chun Chen, Xu Li
Issue Date:July 2005
pp. 4 pp.
The emerging H.264 advanced video coding (H.264/AVC) standard achieves significant improvement in coding efficiency compared with previous standards such as MPEG-2 and H.263. One major contribution of its gain profits from variable-block-size motion estima...
 
Audio-Visual Based Emotion Recognition — A New Approach
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Mingli Song, Jiajun Bu, Chun Chen, Nan Li
Issue Date:July 2004
pp. 1020-1025
Emotion recognition is one of the latest challenges in intelligent human/computer communication. Most of previous work on emotion recognition focused on extracting emotions from visual or audio information separately. A novel approach is presented in this ...
 
Subspace Analysis and Optimization for AAM Based Face Alignment
Found in: Automatic Face and Gesture Recognition, IEEE International Conference on
By Ming Zhao, Chun Chen, Stan Z. Li, Jiajun Bu
Issue Date:May 2004
pp. 290
Active Appearance Models (AAM) is very powerful for extracting objects, e.g. faces, from images. It is composed of two parts: the AAM subspace model and the AAM search. While these two parts are closely correlated, existing efforts treated them separately ...
 
Using rich social media information for music recommendation via hypergraph model
Found in: ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
By Bin Xu, Can Wang, Can Wang, Chun Chen, Chun Chen, Jiajun Bu, Jiajun Bu, Shulong Tan, Shulong Tan, Xiaofei He, Xiaofei He
Issue Date:October 2011
pp. 1-22
There are various kinds of social media information, including different types of objects and relations among these objects, in music social communities such as Last.fm and Pandora. This information is valuable for music recommendation. However, there are ...
     
Link Quality Aware Code Dissemination in Wireless Sensor Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Wei Dong,Yunhao Liu,Zhiwei Zhao,Xue Liu,Chun Chen,Jiajun Bu
Issue Date:July 2014
pp. 1776-1786
Wireless reprogramming is a crucial technique for software deployment in wireless sensor networks (WSNs). Code dissemination is a basic building block to enable wireless reprogramming. We present ECD, an Efficient Code Dissemination protocol leveraging 1-h...
 
Probabilistic Graphlet Cut: Exploiting Spatial Structure Cue for Weakly Supervised Image Segmentation
Found in: 2013 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
By Luming Zhang,Mingli Song,Zicheng Liu,Xiao Liu,Jiajun Bu,Chun Chen
Issue Date:June 2013
pp. 1908-1915
Weakly supervised image segmentation is a challenging problem in computer vision field. In this paper, we present a new weakly supervised image segmentation algorithm by learning the distribution of spatially structured super pixel sets from image-level la...
 
Semi-supervised Node Splitting for Random Forest Construction
Found in: 2013 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
By Xiao Liu,Mingli Song,Dacheng Tao,Zicheng Liu,Luming Zhang,Chun Chen,Jiajun Bu
Issue Date:June 2013
pp. 492-499
Node splitting is an important issue in Random Forest but robust splitting requires a large number of training samples. Existing solutions fail to properly partition the feature space if there are insufficient training data. In this paper, we present semi-...
 
EMR: A Scalable Graph-Based Ranking Model for Content-Based Image Retrieval
Found in: IEEE Transactions on Knowledge and Data Engineering
By Bin Xu,Jiajun Bu,Chun Chen,Can Wang,Deng Cai,Xiaofei He
Issue Date:May 2013
pp. 1
Graph-based ranking models have been widely applied in information retrieval area. In this paper, we focus on a well known graph-based model - the Ranking on Data Manifold model, or Manifold Ranking (MR). Particularly, it has been successfully applied to c...
 
Emotional Speech Analysis on Nonlinear Manifold
Found in: Pattern Recognition, International Conference on
By Mingyu You, Chun Chen, Jiajun Bu, Jia Liu, Jianhua Tao
Issue Date:August 2006
pp. 91-94
This paper presents a speech emotion recognition system on nonlinear manifold. Instead of straight-line distance, geodesic distance was adopted to preserve the intrinsic geometry of speech corpus. Based on geodesic distance estimation, we developed an enha...
 
Emotion Recognition from Noisy Speech
Found in: Multimedia and Expo, IEEE International Conference on
By Mingyu You, Chun Chen, Jiajun Bu, Jia Liu, Jianhua Tao
Issue Date:July 2006
pp. 1653-1656
This paper presents an emotion recognition system from clean and noisy speech. Geodesic distance was adopted to preserve the intrinsic geometry of emotional speech. Based on the geodesic distance estimation, an enhanced Lipschitz embedding was developed to...
 
Relational co-clustering via manifold ensemble learning
Found in: Proceedings of the 21st ACM international conference on Information and knowledge management (CIKM '12)
By Chun Chen, Jiajun Bu, Ping Li, Zhanying He
Issue Date:October 2012
pp. 1687-1691
Co-clustering targets on grouping the samples and features simultaneously. It takes advantage of the duality between the samples and features. In many real-world applications, the data points or features usually reside on a submanifold of the ambient Eucli...
     
An exploration of improving collaborative recommender systems via user-item subgroups
Found in: Proceedings of the 21st international conference on World Wide Web (WWW '12)
By Bin Xu, Chun Chen, Deng Cai, Jiajun Bu
Issue Date:April 2012
pp. 21-30
Collaborative filtering (CF) is one of the most successful recommendation approaches. It typically associates a user with a group of like-minded users based on their preferences over all the items, and recommends to the user those items enjoyed by others i...
     
Efficient manifold ranking for image retrieval
Found in: Proceedings of the 34th international ACM SIGIR conference on Research and development in Information (SIGIR '11)
By Bin Xu, Chun Chen, Deng Cai, Jiajun Bu, Jiebo Luo, Wei Liu, Xiaofei He
Issue Date:July 2011
pp. 525-534
Manifold Ranking (MR), a graph-based ranking algorithm, has been widely applied in information retrieval and shown to have excellent performance and feasibility on a variety of data types. Particularly, it has been successfully applied to content-based ima...
     
Music recommendation by unified hypergraph: combining social media information and music content
Found in: Proceedings of the international conference on Multimedia (MM '10)
By Can Wang, Chun Chen, Hao Wu, Jiajun Bu, Lijun Zhang, Shulong Tan, Xiaofei He
Issue Date:October 2010
pp. 391-400
Acoustic-based music recommender systems have received increasing interest in recent years. Due to the semantic gap between low level acoustic features and high level music concepts, many researchers have explored collaborative filtering techniques in musi...
     
Discriminative codeword selection for image representation
Found in: Proceedings of the international conference on Multimedia (MM '10)
By Chun Chen, Jiajun Bu, Lijun Zhang, Shulong Tan, Xiaofei He, Zhengguang Chen
Issue Date:October 2010
pp. 173-182
Bag of features (BoF) representation has attracted an increasing amount of attention in large scale image processing systems. BoF representation treats images as loose collections of local invariant descriptors extracted from them. The visual codebook is g...
     
Learning a user-thread alignment manifold for thread recommendation in online forum
Found in: Proceedings of the 19th ACM international conference on Information and knowledge management (CIKM '10)
By Can Wang, Cheng Zhang, Chun Chen, Jiajun Bu, Jun Zhao, Ziyu Guan
Issue Date:October 2010
pp. 559-568
People are more and more willing to participate in online forums to share their knowledge and experience. However, it may not be easy for them to find their desired threads in online forums due to the information overload problem. Traditional recommendatio...
     
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