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检索条件"机构=Key Lab. of Cloud Computing Technology"

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An energy-aware protocol for data gathering applications in wireless sensor networks

An energy-aware protocol for data gathering applications in ...

引用

IEEE International Conference on Communications (ICC 2007)

作者： Liu, Ming Zheng, Yuan Cao, Jiannong Chen, Guihai Chen, Lijun Gong, Haigang School of Computer Science and Engineering University of Electronic and Technology of China China Internet and Mobile Computing Lab. Department of Computing Hong Kong Polytechnic University Hong Kong State Key Laboratory for Novel Software Technology Nanjing University China

ISBN: (纸本)9781424403523

Data gathering is a major function of many applications in wireless sensor networks (WSNs). The most important issue in designing a data gathering algorithm is how to save energy of sensor nodes while meeting the requirement of applications/users such as sensing area coverage. In this paper, we propose a novel hierarchical clustering protocol for long-lived sensor network. EAP achieves a good performance in terms of lifetime by minimizing energy consumption for in-network communications and balancing the energy load among all nodes. EAP introduces a new clustering parameter for cluster head election, which can better handle the heterogeneous energy capacities. Furthermore, it also introduces a simple but efficient approach, namely intra-cluster coverage to cope with the area coverage problem. We evaluate the performance of the proposed protocol using a simple temperature sensing application. Simulation results show that our protocol significantly outperforms LEACH and HEED in terms of network lifetime and the amount of data gathered.

关键词： Network protocols

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TH-SLP: Web Service Link Prediction Based on Topic-aware Heterogeneous Graph Neural Network

TH-SLP: Web Service Link Prediction Based on Topic-aware Het...

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2023 IEEE International Conference on Web Services, ICWS 2023

作者： Peng, Qian Cao, Buqing Xie, Xiang Liu, Shanpeng Kang, Guosheng Liu, Jianxun Hunan University of Science and Technology Xiangtan School of Computer Science and Engineering Hunan Provincial Key Lab. for Services Computing and Novel Software Technology Hunan China

ISBN: (纸本)9798350304855

With the emergence of more and more Web services, finding suitable services becomes a difficult problem. Service link prediction is employed to disclose relationships among services, which facilitates the further development of service composition, selection, and recommendation. But the existing link prediction approaches simply utilize the structural features of the service network. In reality, the rich text content in service node description documents also carries latent but fine-grained semantics generated by multifaceted topic-aware factors, yet few efforts are committed to mining them. In this paper, we propose a Web service link prediction method based on a topic-aware heterogeneous graph neural network. Specifically, the method consists of two main layers, including the meta-path intra-decomposition and the meta-path inter-mergence. Meta-path intra-decomposition aims to mine the topic distribution of the meta-paths-based context while capturing fine-grained topic-aware semantics. Meta-path inter-mergence uniquely aggregates topic-aware factors according to the mined distribution and adopts a multifaceted attention mechanism to aggregate different meta-paths, enabling service nodes to generate multifaceted topic-aware embeddings that preserve not only the structure and but also the topic-aware semantics. In addition, a topic prior guidance regularization item is set up for quality assurance of multifaceted topic-aware embedding that depends on global knowledge of the unstructured text content in description documents. Experimental results on real datasets show that our proposed model outperforms other existing baselines methods in the link prediction task, successfully validating the effectiveness of our proposed method. © 2023 IEEE.

关键词： Semantics

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The earthquake probability prediction based on weighted factor coefficients of principal components

The earthquake probability prediction based on weighted fact...

引用

5th International Conference on Natural Computation, ICNC 2009

作者： Xueli, Wei Xiaofeng, Cui Chun, Jiang Xinbo, Zhou Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Earthquake Administration of Tianjin Tianjin 300201 China

ISBN: (纸本)9780769537368

Considering there are many seismicity factors with information overlap, we apply a gray generating -A generating GM model which has higher precision to mine the potential law of these factors, and apply principal component analysis(PCA) approach to reduce the dimension of these factors, choose several seismicity factors which represent most of the information that the original seismicity factors carry, by utilizing Bayes posterior probability discriminant analysis, to predict the largest magnitude for certain region and period numerically and synthetically. As an example, we predicte the annual largest magnitude for North China(30°∼ 42°E, 108°∼125°N). The application results show the practical value of this model in the medium-short-term earthquake prediction. © 2009 IEEE.

关键词： Principal component analysis

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Using global statistics to rank retrieval systems without relevance judgments

Using global statistics to rank retrieval systems without re...

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作者： Shi, Zhiwei Wang, Bin Li, Peng Shi, Zhongzhi Information Retrieval Group Center for Advanced Computing Research Institute of Computing Technology Beijing 100190 China Key Lab. of Intelligent Information Processing Institute of Computing Technology CAS Beijing 100190 China

ISBN: (纸本)3642163262

How to reduce the amount of relevance judgments is an important issue in retrieval evaluation. In this paper, we propose a novel method using global statistics to rank retrieval systems without relevance judgments. In our method, a series of global statistics of a system, which indicate the percentage of its documents found by k out of all the N systems (k = 1, 2, ..., N), are selected, then a linear combination of the series of global statistics is utilized to fit the mean average precision (MAP) of the retrieval system. Optimal coefficients are obtained by linear regression. No human relevance judgments are required in the entire process. Compared with existing evaluation methods without relevance judgments, our method has two advantages. Firstly, it outperforms all early attempts. Secondly, it is adjustable for different effectiveness measurements, e.g. MAP, precision at n, and so forth. © 2010 IFIP.

关键词： Information retrieval

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A consistent pixel-wise blur measure for partially blurred images

A consistent pixel-wise blur measure for partially blurred i...

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作者： Fang, Xianyong Shen, Feng Guo, Yanwen Jacquemin, Christian Zhou, Jian Huang, Shanchun Key Lab. of Intelligent Computing and Signal Processing Anhui University Hefei230601 China State Key Lab. for Novel Software Technology Nanjing University Nanjing210023 China AMI LIMSI-CNRS Orsay91403 France

ISBN: (纸本)9781479957514

Despite numerous efforts on blur measurement of partially blurred images, there still lacks an effective blur measure that is both pixel-wise and locally sharp consistent. The paper proposes a novel method with two contributions to overcome this limitation: 1) A new pixel-based blur metric, Multi-resolution Singular Value (MSV), which leverages the average singular value of high frequency bands to measure the blur of each pixel, and 2) a locally continuous strategy, maximum-likelihood estimation (MLE) based refinement, that ensures local continuity by imposing the local sharp consistency on pixel blur in a local correcting process. Experimental results show that our method is effective to smoothly measure the partially blurred images without local discontinuity. © 2014 IEEE.

关键词： Pixels

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Research on face detection based on combination of Haar and skin colors features

Research on face detection based on combination of Haar and ...

引用

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

作者： Wang, Fayu Qi, Baokun Xing, Yong Lu, Baoan Ministry of Education Tianjin University of Technology Tianjin 300191 China Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781424465149

Face detection and recognition is a hot research subject in the fields of image processing, pattern recognition and computer vision, which emphasize on the enhancement of the precision of detection in as short a time as possible. This paper expounds on how to detect human faces accurately from complex pictures by means of the technology of judgement based on the combination of the feature of Haar and the features of skin colors, and depicts in detail the principles and methods of detection. By the combination of the two methods, we can draw on each other's strength and promote the performance of the algorithm. It has been justified by experiments that this algorithm can produce better detection result, and, for other machinery vision application systems, it is of high value to make use of it as reference. ©2010 IEEE.

关键词： Face recognition

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Interactive attention for neural machine translation 26

Interactive attention for neural machine translation

引用

26th International Conference on Computational Linguistics, COLING 2016

作者： Meng, Fandong Lu, Zhengdong Li, Hang Liu, Qun AI Platform Department Tencent Technology Co. Ltd. China Noah's Ark Lab. Huawei Technologies China ADAPT Centre School of Computing Dublin City University Ireland Key Lab. of Intelligent Information Processing Institute of Computing Technology CAS Ireland

ISBN: (纸本)9784879747020

Conventional attention-based Neural Machine Translation (NMT) conducts dynamic alignment in generating the target sentence. By repeatedly reading the representation of source sentence, which keeps fixed after generated by the encoder (Bahdanau et al., 2015), the attention mechanism has greatly enhanced state-of-the-art NMT. In this paper, we propose a new attention mechanism, called INTERACTIVE ATTENTION, which models the interaction between the decoder and the representation of source sentence during translation by both reading and writing operations. INTERACTIVE ATTENTION can keep track of the interaction history and therefore improve the translation performance. Experiments on NIST Chinese-English translation task show that INTERACTIVE ATTENTION can achieve significant improvements over both the previous attention-based NMT baseline and some state-of-the-art variants of attention-based NMT (i.e., coverage models (Tu et al., 2016)). And neural machine translator with our INTERACTIVE ATTENTION can outperform the open source attention-based NMT system Groundhog by 4.22 BLEU points and the open source phrase-based system Moses by 3.94 BLEU points averagely on multiple test sets. © 1963-2018 ACL.

关键词： Neural machine translation

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Optimizing interactive performance for desktop-virtualization environment

Optimizing interactive performance for desktop-virtualizatio...

引用

Joint International Conference on Pervasive computing and the Networked World, ICPCA/SWS 2012

作者： Wang, Xiaolin Zhang, Binbin Luo, Yingwei Dept. of Computer Science and Technology Peking University Beijing 100871 China Dept. of Computer Science and Engineering Yunnan University Yunnan 650091 China Shenzhen Key Lab. for Cloud Computing Technology and Applications Peking University Shenzhen Graduate School Guangdong 518055 China

ISBN: (纸本)9783642370144

Full virtualization is vastly applied in desktop virtualization. Although hardware-assisted virtualization greatly improves the performance, the interactive performance is still a bottleneck for full virtualization. Interactive performance is mainly influenced by I/O devices. In one hand, I/O devices are slow device. In another hand, they are often shared by multiple virtual machines through simulation. Our study focuses on the interactive performance optimization, and can mainly be classified into three categories: (1) Targeting multi-core system, we investigate virtual machine deployment to ensure stable performance of the whole system and individual virtual machine. (2) Dynamically adjust the resource among virtual machines based on the individual machine's interactive behavior. (3) Optimize the I/O request scheduler in term of the virtualization implementation. © 2013 Springer-Verlag.

关键词： Virtual machine

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A composable mixed mode concurrency control semantics for transactional programs

A composable mixed mode concurrency control semantics for tr...

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14th International Conference on Formal Engineering Methods, ICFEM 2012

作者： Barnett, Granville Qin, Shengchao School of Engineering and Computing Sciences Durham University United Kingdom School of Computing Teesside University United Kingdom State Key Lab. for Novel Software Technology Nanjing University China

ISBN: (纸本)9783642342806

Most software transactional memories employ optimistic concurrency control. A pessimistic semantics, however, is not without its benefits: its programming model is often much simpler to reason about and supports the execution of irreversible operations. We present a programming model that supports both optimistic and pessimistic concurrency control semantics. Our pessimistic transactions, guaranteed transactions (gatomics), afford a stronger semantics than that typically employed by pessimistic transactions by guaranteeing run once execution and safe encapsulation of the privatisation and publication idioms. We describe our mixed mode transactional programming language by giving a small step operational semantics. Using our semantics and their derived schedules of actions (reads and writes) we show that conflicting transactions (atomics) and gatomics are serialisable. We then go on to define schedules of actions in the form of Java's memory model (JMM) and show that the same properties that held under our restrictive memory model also hold under our modified JMM. © 2012 Springer-Verlag.

关键词： Semantics

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Fuzzy reasoning based on prepositional modal logic

Fuzzy reasoning based on prepositional modal logic

引用

4th International Conference, RSCTC 2004

作者： Zhang, Zaiyue Sui, Yuefei Cao, Cungen Jt. Lab. of Intelligent Computing Department of Computer Science East China Shipbuilding Institute Zhenjiang 212003 China Key Lab. of Intelligent Info. Proc. Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

In order to deal with some vague assertions more efficiently, fuzzy modal logics have been discussed by many researchers. This paper introduces the notation of fuzzy assertion based on propositional modal logic. As an extension of the traditional semantics about the modal logics, the fuzzy Kripke semantics are considered and the formal system of the fuzzy reasoning based on propositional modal logic is established and the properties about the satisfiability of the reasoning system are discussed.

关键词： Formal logic

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