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An effective XML identifying feedback documents method based on two-stage ranking model for pseudo-relevance feedback

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2013 3rd International Symposium on Chemical engineering and Material Properties, ISCEMP 2013

作者： Zhong, Min Juan School of Information Technology Jiangxi University of Finance and Economics Nanchang China JiangXi Key Laboratory of Data and Knowledge Engineering Jiangxi University of Finance and Economics Nanchang China

ISBN: (纸本)9783037858363

Although pseudo relevant feedback is an effective query expansion method, query drift away from the topic has been occurred frequently. Therefore, the first important problem is how to identify relevant documents in the top retrieved set and form the good feedback source. In this paper, an effective XML identifying feedback documents method is proposed, in which a two-stage ranking model is presented and the relevant XML documents are found. The experiment results show that the proposed method is reasonable and the quality of feedback source is ensured. © (2013) Trans Tech Publications, Switzerland.

关键词： XML

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Analysis of Profile Injection Attacks against Recommendation Algorithms on Bipartite Networks 8

Analysis of Profile Injection Attacks against Recommendation...

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International Conference on Management of e-Commerce and e-Government (ICMeCG)

作者： Zhang, Fuguo Jiangxi Univ Finance & Econ Sch Informat & Technol Nanchang Peoples R China Jiangxi Univ Finance & Econ Jiangxi Key Lab Data & Knowledge Engn Nanchang Peoples R China

ISBN: (纸本)9781479965434

Despite their great adoption in e-commerce sites, recommender systems are still vulnerable to unscrupulous producers who try to promote their products by shilling the systems. In the past decade, network based recommendation approaches have been demonstrated to be both more efficient and of lower computational complexity than collaborative filtering methods, however as far as we know, there is rare research on the robustness of network based recommendation approaches. In this paper, we conducted a serious of experiments to examine the robustness of five typical network based recommendation algorithms. The empirical results obtained from the movielens dataset show that all the two limited knowledge shilling attacks are successful against the network based algorithms, and the bandwagon attack affects very strongly against most network based recommendation algorithms, especially the algorithms considering the preferential diffusion at the last step. One way to relieve the attack impact is to assign the algorithm a heterogeneous initial resource configuration.

关键词： recommender system shilling attack network based algorithm hit ratio

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An Effective Search Results Semantic Optimization Clustering Method for XML Fragments

An Effective Search Results Semantic Optimization Clustering...

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International Conference on Computer Sciences and Applications (CSA)

作者： Zhong Minjuan Jiangxi Univ Finance & Econ Sch Informat Technol Nanchang Peoples R China Jiangxi Univ Finance & Econ JiangXi Key Lab Data & Knowledge Engn Nanchang Peoples R China

ISBN: (纸本)9780769551258

With the emergence of more and more XML documents, the clustering of XML documents has become an active research area. However, it is more significance of XML element clustering than whole document due to the more focused and specific amount of information, especially to some application domain. Therefore, in this paper, we study the xml element clustering, in which the latent semantic indexing model is used to obtain the semantic relationship between terms firstly, and then a evaluation function for k-mediod is presented to automatic generate the optimal cluster number. In addition, information gain, for evaluating clustering quality is introduced. Experiment results show that the proposed semantic clustering optimization method outperforms the traditional method (No_optimization) in information gain and produces better clustering quality.

关键词： component XML Fragments Search Results Clustering Evaluation Function Optimal Cluster Number

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Fusing heterogeneous information for social image retrieval

Fusing heterogeneous information for social image retrieval

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Int. Workshops on Web-Age Information Management, WAIM 2012: 1st Int. Workshop on GDMM 2012, 2nd Int. Wireless Sensor Networks Workshop, IWSN 2012, 1st Int. Workshop on MDSP 2012, 3rd Int. Workshop on USDM 2012, 4th Int. Workshop on XMLDM 2012

作者： Li, Xirong MOE Key Lab. of Data Engineering and Knowledge Engineering Renmin University of China China

ISBN: (纸本)9783642330490

Given that millions of images are uploaded to the social web in a single day, how to effectively retrieve such increasing amounts of unstructured data becomes crucial. While current social platforms find images on the base of user-contributed tags, the tags are known to be subjective and noisy, and consequently put the effectiveness of social image retrieval into question. Different from existing work which focuses on analyzing individual sources of information such as textual and visual separately, in this paper we propose to fuse the heterogeneous information. We investigate the state of the art weighting methods within a linear fusion framework. Image retrieval experiments on a present day benchmark with 46 visual concept queries show encouraging results. Compared to the best search results obtained by a single source of information, the Uniform method and the Coordinate Ascent method obtain relative performance gain of 3.9% and 5.7% in terms of mean average precision. This work provides some practical guidelines for fusing multiple sources of information for improving social image retrieval. © 2012 Springer-Verlag.

关键词： Image enhancement

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Investigating information needs of elderly people in Chinese rural community: presenting an information service framework 8

Investigating information needs of elderly people in Chinese...

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International Conference on Management of e-Commerce and e-Government (ICMeCG)

作者： Zhou, Ping Jiangxi Univ Finance & Econ Sch Informat Technol Nanchang Peoples R China Jiangxi Univ Finance & Econ Jiangxi Key Lab Data & Knowledge Engn Nanchang Peoples R China

ISBN: (纸本)9781479965434

Investigating information needs of elderly people could find out information required to address needs of the aged in a community to present an information service framework to meet their needs. Using data collected from 600 elderly people through field investigation with a questionnaire in a rural community in central China, the results show that the preferred information format of the vast majority of elderly people is audio and/or visual information product, especially audio product. Most of interviewees stated that they were in need of healthy and medical audio information products. The survey maybe lead to improved and expanded information services for respondents who are short of such services, including Public broadcasting services, extending the audiovisual collection, loaning audiovisuals, religious faith audiovisuals and others providing needed information to them. This paper assembles together views on what the elderly people currently need to be helped by both practitioners and researchers in the elderly people services domain.

关键词： Information needs elderly people Chinese rural community framework

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Towards annotation-free evaluation of cross-lingual image captioning 2

Towards annotation-free evaluation of cross-lingual image ca...

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2nd ACM International Conference on Multimedia in Asia, MMAsia 2020

作者： Chen, Aozhu Huang, Xinyi Lin, Hailan Li, Xirong Moe Key Lab of Data Engineering and Knowledge Engineering Renmin University of China Beijing China

ISBN: (纸本)9781450383080

Cross-lingual image captioning, with its ability to caption an unlabeled image in a target language other than English, is an emerging topic in the multimedia field. In order to save the precious human resource from re-writing reference sentences per target language, in this paper we make a brave attempt towards annotation-free evaluation of cross-lingual image captioning. Depending on whether we assume the availability of English references, two scenarios are investigated. For the first scenario with the references available, we propose two metrics, i.e., WMDRel and CLinRel. WMDRel measures the semantic relevance between a model-generated caption and machine translation of an English reference using their Word Mover's Distance. By projecting both captions into a deep visual feature space, CLinRel is a visual-oriented cross-lingual relevance measure. As for the second scenario, which has zero reference and is thus more challenging, we propose CMedRel to compute a cross-media relevance between the generated caption and the image content, in the same visual feature space as used by CLinRel. We have conducted a number of experiments to evaluate the effectiveness of the three proposed metrics. The combination of WMDRel, CLinRel and CMedRel has a Spearman's rank correlation of 0.952 with the sum of BLEU-4, METEOR, ROUGE-L and CIDEr, four standard metrics computed using references in the target language. CMedRel alone has a Spearman's rank correlation of 0.786 with the standard metrics. The promising results show high potential of the new metrics for evaluation with no need of references in the target language. © 2021 ACM.

关键词： Semantics

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Approximation algorithm for constructing data aggregation trees for wireless sensor networks

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中国高等学校学术文摘·计算机科学 2009年第4期3卷 524-534页

作者： Deying LI Jiannong CAO Qinghua ZHU Key Laboratory of Data Engineering and Knowledge Engineering School of InformationRenmin University of ChinaBeijing 100872China Internet and Mobile Computing Lab Department of ComputingHong Kong Polytechnic UniversityHong KongChina

This paper considers the problem of constructing data aggregation trees in wireless sensor networks (WSNs)for a group of sensor nodes to send collected information to a single sink *** data aggregation tree contains the sink node,all the source nodes,and some other non-source *** goal of constructing such a data aggregation tree is to minimize the number of non-source nodes to be included in the tree so as to save *** prove that the data aggregation tree problem is NP-hard and then propose an approximation algorithm with a performance ratio of four and a greedy *** also give a distributed version of the approximation *** simulations are performed to study the performance of the proposed *** results show that the proposed algorithms can find a tree of a good approximation to the optimal tree and has a high degree of scalability.

关键词： WSNs data aggregation tree approximation algorithm distributed algorithm

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A Multi-channel Hierarchical Graph Attention Network for Open Event Extraction

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ACM TRANSACTIONS ON INFORMATION SYSTEMS 2023年第1期41卷 1-27页

作者： Wan, Qizhi Wan, Changxuan Xiao, Keli Hu, Rong Liu, Dexi Jiangxi Key Lab Data & Knowledge Engn Nanchang 33013 Jiangxi Peoples R China Jiangxi Univ Finance & Econ Sch Informat Management Nanchang 330032 Jiangxi Peoples R China SUNY Stony Brook Coll Business Stony Brook NY 11794 USA Jiangxi Univ Finance & Econ Sch Software & Internet Things Engn Nanchang 330032 Jiangxi Peoples R China

Event extraction is an essential task in natural language processing. Although extensively studied, existing work shares issues in three aspects, including (1) the limitations of using original syntactic dependency structure, (2) insufficient consideration of the node level and type information in Graph Attention Network (GAT), and (3) insufficient joint exploitation of the node dependency type and part-of-speech (POS) encoding on the graph structure. To address these issues, we propose a novel framework for open event extraction in documents. Specifically, to obtain an enhanced dependency structure with powerful encoding ability, our model is capable of handling an enriched parallel structure with connected ellipsis nodes. Moreover, through a bidirectional dependency parsing graph, it considers the sequence of order structure and associates the ancestor and descendant nodes. Subsequently, we further exploit node information, such as the node level and type, to strengthen the aggregation of node features in our GAT. Finally, based on the coordination of triple-channel features (i.e., semantic, syntactic dependency and POS), the performance of event extraction is significantly improved. Extensive experiments are conducted to validate the effectiveness of our method, and the results confirm its superiority over the state-of-the-art baselines. Furthermore, in-depth analyses are provided to explore the essential factors determining the extraction performance.

关键词： Open event extraction bidirectional dependency parsing graph Hierarchical Graph Attention Network multiple channels

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An empirical investigation of the older adults' continuance intention towards SNSs

An empirical investigation of the older adults' continuance ...

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作者： Liu, Wei Jiangxi Key Laboratory of Data and Knowledge Engineering Institute of Information Resources Management School of Information Technology Jiangxi University of Finance and Economics Nanchang360013 China

Although Social Network Services (SNSs) continuance usage has recently emerged as an important issue in information systems adaption, the research into older adults' continuance intention towards SNS is still very low, and the acceptance-discontinuance anomaly phenomenon (i.e. users discontinue using e-learning after initially accepting it) is a common occurrence. This study joins the perceived risk and perceived enjoyment to our prior research model which integrated the Expectation-Confirmation Model (ECM), the Technology Acceptance Model (TAM) and the Theory of Planned Behaviour (TPB) to hypothesise a theoretical model to explain and predict the older adults' intentions to continue using SNSs. The hypothesised model is validated empirically using a sample collected from 320 older adults who had prior experience with SNSs and was tested against the proposed research model using structure equation modelling. The results demonstrate that satisfaction has the most significant effect on older adults' continuance intention, followed by perceived usefulness, perceived risk, subject norm and perceived behavioural control. The results of these findings for SNSs practitioners are discussed at the end of this work. © Copyright 2016 Inderscience Enterprises Ltd.

关键词： Social networking (online)

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Rapid resynchronization method for replication in-memory databases supporting mobile communication applications

Rapid resynchronization method for replication in-memory dat...

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2009 WRI World Congress on Computer Science and Information engineering, CSIE 2009

作者： Guoqiong, Liao Jing, Li School of Information Technology Jiangxi University of Finance and Economics Nanchang 330013 Thailand Jiangxi Key Laboratory of Data and Knowledge Engineering Jiangxi University of Finance and Economics Nanchang 330013 Thailand

ISBN: (纸本)9780769535074

In this paper, a rapid resynchronization method using intent logs is suggested for replication In-memory databases supporting mobile communication applications. Both the identifiers of unsynchronized segments and the identifiers of the slaves who have missed the updates in the segments are recorded in the intent logs. When receiving a resynchronization request from a slave, the master will scan the intent logs to find the unsynchronized segments for the salve, and then send the segments gotten directly from its memory to the slave. The performance results shown the intent logs method can reduce resynchronization time than methods using transaction logs. © 2008 IEEE.

关键词： Mobile telecommunication systems

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