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International Conference on computer science and Network Technology

作者： Wenhua Zhu College of Computer Science Zhejiang University Zhejiang Provincial Key Laboratory of Service Robot Hangzhou China

ISBN: (纸本)9781467381741

Parallelizing error diffusion is a difficult task because of its inherently serial character in the original form. In this paper, we describe an error compensation strategy for parallel error diffusion. In our method, original image is split into independent blocks. In order to compensate for the missing errors around the boundary of blocks, the accumulated error of block's boundary pixels is simulated and a post-processing is also employed to compensate the boundary pixels. This parallel method can be applied on the traditional error diffusion algorithm to achieve high quality halftone image.

关键词： compensation strategy parallelism error diffusion Error diffusion parallelism Error compensation cumulative error boundary layer ORIGINAL Synclitism

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Novel digital carpet printing using acid ink

Novel digital carpet printing using acid ink

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International Conference on Information and Automation (ICIA)

作者： Wenhua Zhu Qiang Wang College of Computer Science Zhejiang Provincial Key Laboratory of Service Robot Hangzhou China Hangzhou Dianzi University School of Information Engineering Hangzhou China

Because of the extensive amount of waste water that is discharged during its processes, conventional carpet printing is a big polluting industry. In this paper, we propose a new digital carpet printing method based on traditional textile-printing technology. Our method aims to remove limitations in carpet design and eliminate industry pollution. A series of measures are performed to raise the permeability of acid inks. In addition, a new ink control method is employed to compensate for penetrated color inks. This results in carpet production processes that not only take advantage of digital textile printers, but also satisfy the requirements of carpet production.

关键词： Ink Printing Image color analysis Printers Fabrics Head

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The 5th International Conference on Biomedical Engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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An oriented random walk model for simulation test in the indoor navigation for visually impaired users

An oriented random walk model for simulation test in the ind...

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2014 International Conference on Network Security and Communication Engineering(NSCE 2014)

作者： Z.Yu X.B.Zhang K.Huang W.Wang Zhejiang Provincial Key Laboratory of Service Robot College of Computer ScienceZhejiang University

Position Detection is an important application in Wireless Sensor Network and has received much research ***,it has been used for indoor navigation for people with visual ***,experiment and evaluation of these systems usually incur a high cost in that users with disability must be *** address this issue,this paper proposes an Oriented Random Walk Model for the simulation test before sensors are *** can be reduced and more efficient deployment can be deployed.

关键词： An oriented random walk model for simulation test in the indoor navigation for visually impaired users simulation

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Paragraph reconstruction for postscript documents with complex layout

Paragraph reconstruction for postscript documents with compl...

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2014 International Conference on Network Security and Communication Engineering(NSCE 2014)

作者： M.N.Zhang M.Y.Li W.Wang Z.Yu Zhejiang Provincial Key Laboratory of Service Robot College of Computer ScienceZhejiang University

Electronic publishing has become an irreversible trend in publishing *** important step in electronic publishing is to convert a scanned copy or a digital image of a document into editable texts,which is very important to the people with visual impairment,who access the information by means of *** methods for document parsing and paragraph reconstruction only work on PostScript documents with a simple and standard *** techniques are severely limited when applied to documents with complex layout and irregular *** address this issue,we propose a rectangle segmenting approach to make paragraph reconstruction for Postscript documents with complex layout.

关键词： red image Paragraph reconstruction for postscript documents with complex layout

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WebRTC based remote rehabilitation guidance system

WebRTC based remote rehabilitation guidance system

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2014 International Conference on Network Security and Communication Engineering(NSCE 2014)

作者： Q.H.Shi J.Zheng W.Wang Y.Wu Z.J.Yan Zhejiang Provincial Key Laboratory of Service Robot College of Computer ScienceZhejiang University Zhejiang Yuying College of Vocational Technology

Compared with the large number of disabled population,medical resource is scarce and partially *** the development of Internet and information technology,more and more services can be provided through the network,not restricted by *** this context,this paper developed a P2 P instant communication system based on the WebRTC technology and realized a remote rehabilitation guidance *** goal of this system is to make sure that a user can receive remote rehabilitation guidance scheme through computer or mobile *** system has no need to install additional software and *** open web rehabilitation guidance can be realized through a browser only.

关键词： VBE WebRTC based remote rehabilitation guidance system

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Domo: Passive Per-Packet Delay Tomography in Wireless Ad-hoc Networks

Domo: Passive Per-Packet Delay Tomography in Wireless Ad-hoc...

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International Conference on Distributed Computing Systems

作者： Yi Gao Wei Dong Chun Chen Jiajun Bu Tianyu Chen Mingyuan Xia Xue Liu Xianghua Xu Zhejiang University Hangzhou Zhejiang CN Zhejiang Provincial Key Laboratory of Service Robot Zhejiang University China Hangzhou Dianzi University Hangzhou Zhejiang CN School of Computer Science McGill University Canada Zhejiang Provincial Key Lab of Data Storage and Transmission Technology Hangrhou Dianzi University China

In multi-hop wireless ad-hoc networks, packet delivery delay is one of the most important performance metrics. While a lot of research efforts have been spent on measuring and optimizing the end-to-end delay performance, there usually lack accurate and lightweight methods for decomposing the end-to-end delay into the per-hop delay for each packet. Knowledge on the per-hop per-packet delay can greatly improve the network visibility and facilitate network measurement and management. In this paper, we propose Domo, a passive, lightweight and accurate delay tomography approach to decomposing the packet end-to-end delay into each hop. The basic idea is to formulate the problem into a set of optimization problems by carefully considering the constraints among various timing quantities. At the network side, Domo attaches a small overhead to each packet for constructing constraints of the optimization problems. At the PC side, Domo employs semi-definite relaxation and several other methods to efficiently solve the optimization problems. We implement Domo and evaluate its performance extensively using large-scale simulations. Results show that Domo significantly outperforms two existing methods, nearly tripling the accuracy of the state-of-the-art.

关键词： Delays Ad hoc networks Wireless communication Optimization Accuracy Tomography Educational institutions

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Harmonious Hashing

Harmonious Hashing

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23rd International Joint Conference on Artificial Intelligence, IJCAI 2013

作者： Xu, Bin Bu, Jiajun Lin, Yue Chen, Chun He, Xiaofei Cai, Deng Zhejiang Provincial Key Laboratory of Service Robot College of Computer Science Zhejiang University China State Key Lab of CAD and CG College of Computer Science Zhejiang University China

ISBN: (纸本)9781577356332

Hashing-based fast nearest neighbor search technique has attracted great attention in both research and industry areas recently. Many existing hashing approaches encode data with projection-based hash functions and represent each projected dimension by 1-bit. However, the dimensions with high variance hold large energy or information of data but treated equivalently as dimensions with low variance, which leads to a serious information loss. In this paper, we introduce a novel hashing algorithm called Harmonious Hashing which aims at learning hash functions with low information loss. Specifically, we learn a set of optimized projections to preserve the maximum cumulative energy and meet the constraint of equivalent variance on each dimension as much as possible. In this way, we could minimize the information loss after binarization. Despite the extreme simplicity, our method outperforms superiorly to many state-of-the-art hashing methods in large-scale and high-dimensional nearest neighbor search experiments.

关键词： Hash functions

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Whom to mention: Expand the diffusion of tweets by @ recommendation on micro-blogging systems

Whom to mention: Expand the diffusion of tweets by @ recomme...

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22nd International Conference on World Wide Web, WWW 2013

作者： Wang, Beidou Wang, Can Bu, Jiajun Chen, Chun Zhang, Wei Vivian Cai, Deng He, Xiaofei Zhejiang Provincial Key Laboratory of Service Robot College of Computer Science Zhejiang University China Microsoft Corporation Redmond WA United States State Key Lab of CAD and CG College of Computer Science Zhejiang University China

ISBN: (纸本)9781450320351

Nowadays, micro-blogging systems like Twitter have become one of the most important ways for information sharing. In Twitter, a user posts a message (tweet) and the others can forward the message (retweet). Mention is a new feature in micro-blogging systems. By mentioning users in a tweet, they will receive notifications and their possible retweets may help to initiate large cascade diffusion of the tweet. To enhance a tweet's diffusion by finding the right persons to mention, we propose in this paper a novel recommendation scheme named as whom-to-mention. Specifically, we present an in-depth study of mention mechanism and propose a recommendation scheme to solve the essential question of whom to mention in a tweet. In this paper, whom-to-mention is formulated as a ranking problem and we try to address several new challenges which are not well studied in the traditional information retrieval tasks. By adopting features including user interest match, content-dependent user relationship and user influence, a machine learned ranking function is trained based on newly defined information diffusion based relevance. The extensive evaluation using data gathered from real users demonstrates the advantage of our proposed algorithm compared with the traditional recommendation methods. Copyright is held by the International World Wide Web Conference Committee (IW3C2).

关键词： Social networking (online)

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Pathfinder: Robust path reconstruction in large scale sensor networks with lossy links

Pathfinder: Robust path reconstruction in large scale sensor...

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International Conference on Network Protocols

作者： Yi Gao Wei Dong Chun Chen Jiajun Bu Gaoyang Guan Xuefeng Zhang Xue Liu Zhejiang Provincial Key Laboratory of Service Robot Zhejiang University School of Computer Science McGill University

ISBN: (纸本)9781479912681

In wireless sensor networks, sensor nodes are usually self-organized, delivering data to a central sink in a multi-hop manner. Reconstructing the per-packet routing path enables fine-grained diagnostic analysis and performance optimizations of the network. The performances of existing path reconstruction approaches, however, degrade rapidly in large scale networks with lossy links. In this paper, we propose Pathfinder, a robust path reconstruction method against packet losses as well as routing dynamics. At the node side, Pathfinder exploits temporal correlation between a set of packet paths and efficiently compresses the path information using path difference. At the PC side, Pathfinder infers packet paths from the compressed information and employs intelligent path speculation to reconstruct the packet paths with high reconstruction ratio. We evaluate several variations of Pathfinder as well as two most related approaches using traces from a large scale deployment and extensive simulations. Results show that Pathfinder outperforms existing approaches, achieving both high reconstruction ratio and low transmission overhead.

关键词： Routing Vectors Containers Packet loss Encoding Wireless sensor networks

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