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2nd International Conference on Information Technology and Electronic Commerce, ICITEC 2014

作者： Wen, Junwu Chu, Zhuanzhuan Zhou, Jian School of Electrical Engineering and Automation Anhui University Hefei230601 China School of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing210003 China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei230601 China

ISBN: (纸本)9781479952984

Noisy whisper contaminated by different types of noise are enhanced by compressive sensing method. The intelligibility performance of the enhanced whisper is measured using the short time objective index (STOI). To assess the effect of spectra density on compressive sensing, the real-valued discrete Gabor transform is used to transform the noisy whisper into the time-frequency domain. Experimental results show that, similar to conventional speech enhancement algorithm, the compressive sensing based speech enhancement method can not efficiently improve intelligibility of the whisper. © 2014 IEEE.

关键词： Compressed sensing

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Forecasting wheat aphid with remote sensing based on relevance vector machine

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Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 2015年第6期31卷 201-207页

作者： Tang, Cuicui Huang, Wenjiang Luo, Juhua Liang, Dong Zhao, Jinling Huang, Linsheng Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei230039 China School of Electronic and Information Engineering Anhui University Hefei230039 China Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing100094 China Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing210008 China

The prevalence of aphid in winter wheat field has a significant impact on the production of winter wheat. An effective and timely forewarning of the scope and severity of the disease at a regional scale will not only reduce yield losses but also alert the stakeholders to take effective preventive measures. Forecasting aphid occurrence with Remote Sensing has great advantages over traditional methods and meteorological data, such as lower cost, simpler operation, more real-time and higher resolution. Chinese HJ-1A/1B data which have a high revisit frequency ( ©, 2015, Chinese Society of Agricultural Engineering. All right reserved.

关键词： Satellite imagery

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A secure broadcasting method based on the generalized aryabhata remainder theorem

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Journal of Information Hiding and Multimedia signal processing 2014年第4期5卷 709-718页

作者： Liu, Yanjun Chang, Chin-Chen Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University No.111 Jiulong Rd Hefei230601 China Department of Computer Science and Information Engineering Asia University No.500 Lioufeng Rd Wufeng Taichung413 Taiwan Department of Information Engineering and Computer Science Feng Chia University No.100 Wenhwa Rd Seatwen Taichung407 Taiwan

With the prevalence of group communications, how to implement secure broadcasting among group members has become one of the most important issues. Broadcasting is a point-to-multipoint communication, and secure broadcasting should ensure that only authorized group members can obtain the correct content of the message that is broadcast by a sender. In this paper, we propose a secure broadcasting method based on the generalized Aryabhata remainder theorem (GART). By the use of the RSA public-key scheme, the proposed scheme allows the sender to send one copy of an encrypted message to all group members, but only the authorized members can recover the plaintext. Analysis showed that our scheme is secure and efficient. © 2014.

关键词： Cryptography

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A group key distribution system based on the generalized aryabhata remainder theorem for enterprise digital rights management

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Journal of Information Hiding and Multimedia signal processing 2015年第1期6卷 140-153页

作者： Liu, Yanjun Chang, Chin-Chen Chang, Shih-Chang Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University No.111 Jiulong Rd Hefei230601 China Department of Computer Science and Information Engineering Asia University No.500 Lioufeng Rd Wufeng Taichung413 Taiwan Department of Information Engineering and Computer Science Feng Chia University No.100 Wenhwa Rd Seatwen Taichung407 Taiwan Department of Computer Science and Information Engineering National Chung Cheng University No.168 Sec.1 University Rd Min-Hsiung Township Chiayi621 Taiwan

Digital Rights Management (DRM) is a type of access-control technology that is used by diverse content providers to restrict the use of digital content. Enterprise Digital Rights Management (E-DRM) is an application of DRM techniques for managing the control of access to sensitive documents in an enterprise. In this paper, we propose a group key distribution system for E-DRM based on the concept of a secret-sharing mechanism and the generalized Aryabhata remainder theorem (GART). To the best of our knowledge, no previous publications related to E-DRM technologies have presented the group key distribution system that we propose. In our system, different groups of enterprise members within the enterprise obtain different digital content in parallel without collision by using their group’s unique session key;all members within each group share a common session key to decrypt the same digital documents to acquire the correct content. We proved that our system achieves the goal of providing high security, which includes preventing inside and outside attacks and offering forward and backward secrecy. © 2015.

关键词： Copyrights

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Cost-sensitive three-way decisions model based on CCA

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作者： Zhang, Yanping Zou, Huijin Chen, Xi Wang, Xiangyang Tang, Xuqing Zhao, Shu Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Hefei Anhui Province 230601 China School of Computer Science and Technology Anhui University Hefei Anhui Province 230601 China Anhui Electrical Engineering Professional Technique College Hefei Anhui Province 230051 China Jiangnan University Wuxi China

ISBN: (纸本)9783319086439

The concept of three-way decisions was proposed by Yao and most of three-way decisions models use two thresholds α and β to partition the universe into three parts: the positive region POS(X), the negative region NEG(X) and the boundary region BND(X). But acquirement of a pair of thresholds is a challenge. In this paper, we propose a new method to get the thresholds of three-way decisions model. We introduce loss function into three-way decisions model based on constructive covering algorithm (CCA). A loss function is interpreted as the costs of making classification decisions. More specifically, for reducing losses of classification, we change the radius of the cover according to the loss function, then we compute the thresholds based on the modification. This paper propose an effective method to compute thresholds α and β, which is according to cost-sensitive three-way decisions model based on CCA. © 2014 Springer International Publishing.

关键词： Costs

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Research for delay tolerant network node similarity-based on social network

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Journal of Computational Information Systems 2013年第13期9卷 5189-5195页

作者： Wang, Guizhu Yang, Yingying Song, Xin Wang, Jie Li, Weiming Ding, Dawei Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

Social network is a special kind of network, and the relationship between nodes in social networks are used to evaluate a network of social-related strength. Network area is divided into multiple regions, as the network node has its own properties in the multiple regions, the use of node location, direction of movement, movement speed, active between the nodes to reflect the Multi-region Similarity. The Simulation shows the node of forwarding packet is based on the Multi-region Similarity of nodes, which would greatly improve the forwarding efficiency, and reduce the consumption of network resources at the same time. © 2013 by Binary Information Press.

关键词： Delay tolerant networks

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Text classification based on feature selection and LDA model

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Journal of Computational Information Systems 2013年第6期9卷 2321-2328页

作者： Zheng, Cheng Xiang, Long Liu, Jiaoli Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei 230039 China

The tradition methods about feature selection are based on mathematical statistics and lack of semantic information. LDA(Latent Dirichlet Allocation) model is a three-level hierarchical Bayesian and a kind of unsupervised learning model. With the ability to express the text topic which has been put forward in recent years, it can explore the semantic information which has been hidden in the documents without the help of outer knowledge bases. This paper presents a kind of text classification method based on the feature selection and LDA model, blends the digital representation of tests which have been obtained from the mathematical statistics and LDA model and then classify the texts. This method can combine the external and internal information presented by the texts well. Experiments on Sogou Corgus show the method can improve text classification effectiveness: On micro F1 measures, it approaches an improvement of 9.4% and 2.84% respectively on contrast experiments. Copyright © 2013 Binary Information Press.

关键词： Feature Selection

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Core nodes-assisted energy-saving and routing research in delay tolerant networks

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Journal of Computational Information Systems 2013年第5期9卷 2057-2065页

作者： Wang, Guizhu Wang, Jie Song, Xin Yang, Yingying Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

In realistic Delay Tolerant Networks (DTNs), the nodes need to keep probing the environment to discover the neighbors in their transmission range. In this paper we assume that the network has a small amount of energy-sufficient nodes, or core nodes, continuously transmitting beacon messages, thereby enhancing the probability of successful probing and alleviating the regular nodes' energy consumption. We first derive the regular node's probability distribution of link duration when the network has some core nodes, then on this basis, the theoretical energy consumption of the regular nodes. The simulation results show that besides energy saving, the message delivery rate and average delay are all improved when compared with the network that only has regular nodes. Copyright © 2013 Binary Information Press.

关键词： Energy conservation

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A distributed differential transmission scheme based on cyclic delay diversity for two-way wireless cooperative relay networks

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Journal of Computational Information Systems 2013年第15期9卷 5995-6001页

作者： Zhang, Hongwei Li, Fengzhen Liu, Jianxun Li, Xiaohui Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

While neither both source terminals nor relay nodes know any channel state information (CSI) in twoway wireless relay networks, it is difficult for some conventional distributed differential relay models to achieve high spectrum efficiency and good diversity performances. To solve this problem, a threestage distributed differential transmission scheme using space-time-frequency coding method based on cyclic delay diversity (CDD) is proposed in this paper. The differentially encoded data at two source terminals are sent to all relay nodes respectively during the first two stages, and the message matrices are designed by normalized or constant-modulus (CM) modulation symbols. Then cyclic delay manner is used to amplify-and-forward (AF) the received signals at all relays in different time slots during the third stage. Due to the employment of CDD ways, the design of differential transmission is simplified and the detection complexity is reduced. Simulation results verify that the proposed differential scheme can exploit high spatial diversity gains and then implement high reliable transmission. © 2013 Binary Information Press.

关键词： Channel state information

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Improved hybrid algorithm of indoor wireless localization based on RSSI for wireless sensor networks

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Journal of Computational Information Systems 2013年第9期9卷 3707-3714页

作者： Zhu, Jun Gao, Hui Ma, Shuai Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China

Due to the complexity of indoor wireless environment, indoor position is more difficult than other location technologies in wireless sensor network, and how to improve accuracy of location is one of the key research problems. So a new hybrid algorithm based on RSSI (Received signal Strength Indicator) is proposed. In this algorithm, a dynamic real-time method of solving path fading factor is introduced, which improves accuracy of RSSI ranging obviously;then a modified algorithm based on weighted centric algorithm is used, which improves accuracy of location estimation. Simulation results show that the hybrid algorithm has better performance compared with weighted centric algorithm and least square method algorithm. The proposed hybrid algorithm can achieve obviously higher localization accuracy and better error performances. © 2013 by Binary Information Press.

关键词： Wireless sensor networks

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