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Design of distribution transformer monitoring system based on LPC2103

Journal of Convergence Information technology 2012年第21期7卷 120-126页

作者： Sun, Qindong Wang, Qian Wang, Nan Network Computing and Security Key Lab of Shaanxi Xi'an University of Technology Xi'an 710048 China

Aimed at satisfying the monitoring requirement of distribution transformer, a kind of distribution transformer monitoring system based on LPC2103 is designed. Hardware module and data processing program of the monitoring system are introduced. The SD card of large capacity is used to store data collected by the supervising system, which could support the detail analysis of running status of distribution transformer. A simplified design of electricity cut examination is adopted to decrease the complexity and cost of the system. The system has been used in truth circumstance and the performance of system is satisfactory.

关键词： Monitoring

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Predicting cement compressive strength using double-layer multi-expression programming

Predicting cement compressive strength using double-layer mu...

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4th International Conference on Computational and Information Sciences, ICCIS 2012

作者： Zhang, Qingke Yang, Bo Wang, Lin Zhu, Fuxiang Shandong Province Key Laboratory of Network Based Intelligent Computing University of Jinan Jinan China Computer Networks and Distributed Systems Laboratory Beijing Institute Technology Beijing China

ISBN: (纸本)9780769547893

This paper presents a novel algorithm named Double-layer Multi-expression Programming (DMEP). Then DMEP model is applied to the prediction of 28-day Portland cement compressive strength. We compare DMEP model with other four soft computing models, namely Multi-Expression Programming model (MEP), Gene Expression Programming model (GEP), Neural networks model (NN) and Fuzzy logic model (FL) on 28-day cement strength prediction. The experiment results show that DMEP model has a lower rate in RMSE and MAE, and the prediction average percentage error of the cement strength data using DMEP model is reduced to 2.18%, which is lower than other four models. The results obtained from the computational tests demonstrate that DMEP is a promising technique for the prediction of cement strength. © 2012 IEEE.

关键词： Soft computing

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An efficient mutation-based fuzz testing approach for detecting flaws of network protocol

An efficient mutation-based fuzz testing approach for detect...

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2012 International Conference on Computer Science and Service System, CSSS 2012

作者： Zhang, Zhao Wen, Qiao-Yan Tang, Wen State Key Laboratory of Network and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China IT Security Cooperate Technology Siemens Ltd. China Beijing 100102 China

ISBN: (纸本)9780769547190

security flaws existed in protocol implementations might be exploited by malicious attackers and the consequences can be very serious. Therefore, detecting vulnerabilities of network protocol implementations is becoming a hot research topic recently. However, protocol security test is a very complex, challenging and error-prone task, as constructing test packets manually or randomly are not practical. This paper presents an efficient mutation-based approach for detecting implementation flaws of network *** with other protocol testing tools, our approach divides the procedure of protocol testing into many phases, and flexible design can cover many testing cases for the protocol implementations under testing, and could apply for testing various protocol implementations quite easily. Besides, this approach is more comprehensible that makes the protocol security test easier to carry out. To assess the usefulness of this approach, several experiments are performed on four FTP server implementations and the results showed that our approach can find flaws of protocol implementation very easily. The method is of the important application value and can improve the security of network protocols. © 2012 IEEE.

关键词： Testing

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Annihilators of fast discrete fourier spectra attacks

Annihilators of fast discrete fourier spectra attacks

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7th International Workshop on security, IWSEC 2012

作者： Wang, Jingjing Chen, Kefei Zhu, Shixiong Department of Computer Science and Engineering Shanghai Jiaotong University Shanghai China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai China Science and Technology on Communication Security Laboratory Chengdu China

ISBN: (纸本)9783642341168

Spectra attacks proposed recently are more data efficient than algebraic attacks against stream cipher. They are also time-and-space efficient. A measurement of the security of a stream cipher against spectra attacks is spectral immunity, the lowest spectral weight of the annihilator of the key stream. We study both the annihilator and the spectral immunity. We obtain a necessary and sufficient condition for the existence of low spectral weight annihilator and find it is more difficult to decide the (non)existence of the low weight annihilator for spectra attacks than for algebraic attacks. We also give some basic properties of annihilators and find the probability of a periodic sequence to be the annihilator of another sequence of the same period is low. Finally we prove that the spectral immunity is upper bounded by half of the period of the key stream. As a result, to recover any key stream, the least amount of bits required by spectra attacks is at most half of its period. © Springer-Verlag Berlin Heidelberg 2012.

关键词： security of data

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Concurrent access control using subcarrier signature in heterogeneous MIMO-based WLAN

Concurrent access control using subcarrier signature in hete...

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5th International Workshop on Multiple Access Communications, MACOM 2012

作者： Shen, Hu Lv, Shaohe Sun, Yanqiang Dong, Xuan Wang, Xiaodong Zhou, Xingming National Key Laboratory of Parallel and Distributed Processing National University of Defense Technology Changsha 410073 China Institute of Network Information and Security National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9783642349751

In recent WLAN standards (such as IEEE 802.11n), MIMO (Multiple Input Multiple Output) is deployed to provide high data transmission rate. It is however challenging to efficiently share the channel resources among different stations/users. In this paper, we study the MAC protocol in heterogeneous MIMO-based WLAN to effectively exploit the capability of concurrent transmission. We propose a novel subcarrier encoding method, which uses frequency signatures to perform the control message exchange between the AP and multiple stations simultaneously. Afterwards, a MAC protocol, HT-MIMO MAC, is presented to support concurrent transmission in both the uplink and downlink directions. HT-MIMO MAC supports link adaptation and is completely compatible with legacy stations. We evaluate the performance of the HT-MIMO MAC protocol and find that it outperforms the existing 802.11 MAC protocol with SU-MIMO and the downlink MU-MIMO MAC protocol in [9] with a remarkable throughput gains up to 86%. © 2012 Springer-Verlag.

关键词： MIMO systems

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Stochastic prefix-based fault tolerant source routing algorithm for network on chip

Stochastic prefix-based fault tolerant source routing algori...

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2012 International Conference on Computer and Information Science, ICCIS 2012 - A Conference of World Engineering, Science and technology Congress, ESTCON 2012

作者： Xu, Gengchun Ren, Kaixin Gu, Naijie Anhui Province Key Laboratory of Computing and Communication Software Hefei China USTC-SICT Joint Laboratory on Network and Communication Hefei China School of Computer Science and Technology University of Science and Technology of China Hefei China

ISBN: (纸本)9781467319386

In this paper, a novel fault-tolerant source routing algorithm for network on Chip (NOC) called Stochastic Prefix-based Source Routing (SPSR) is proposed. Compared to non-source routing algorithms, it releases the intermediate node from complicated decision-making or routing table maintenance. Unlike the traditional source routing algorithms which use broadcast packets to record the YD of every intermediate node in Route Discovery, it predetermine prospective routes, which can greatly reduces the packets generated and forwarded in the Route Discovery phase, and therefore reduces the power consumption. The proposed routing algorithm is implemented on the open source simulator Nirgam [14], incorporating Orion [15] to estimate the power consumption. Experiment results show that the proposed algorithm can greatly reduce the power consumption in the route discovery and the latency of SPSR is comparable with that of the broadcasting mechanism. © 2012 IEEE.

关键词： network-on-chip

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An evaluation model of botnet based on peer to peer 4th

An evaluation model of botnet based on peer to peer

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4th International Conference on Computational Intelligence and Communication networks, CICN 2012

作者： Jian, Gao Zheng, Kangfeng Yang, Yixian Niu, Xinxin Chinese People's Public Security University BeiJing China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications BeiJing China

ISBN: (纸本)9781467329811

We propose a evaluation model of botnet based on peer to peer. We propose key metrics to measure their activities(e.g, Stealthy, Effectiveness, Efficiency and Robustness). Using these performance metrics, we can study p2p botnet in a systematic way, and more convenient to find the method to defense botnet. In particular, our models show that the important relationship between degree and these metrics in p2p botnet. Our experiments prove that, the degree of nodes play an important role in evaluating robust of botnet, at the same time, the differences of node degree also an important metric in our evaluation system. We evaluate some botnet using simulation and demonstrate the utility of our proposed metrics. Our analysis show how botnet can be evaluated according to structure and communication using our proposed metrics. © 2012 IEEE.

关键词： Botnet peer to peer Peers Metronidazole Performance metrics

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Accountable authority key policy attribute-based encryption

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Science China(Information Sciences) 2012年第7期55卷 1631-1638页

作者： WANG YongTao 1,2 ,CHEN KeFei 1,3 ,LONG Yu 1,4 & LIU ZhaoHui 2 1 Department of Computer Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China 2 China Information technology security Evaluation Center,Beijing 100085,China 3 Shanghai key laboratory of Scalable computing and Systems,Shanghai Jiao Tong University,Shanghai,200240,China 4 State key laboratory of Information security,Graduate School of Chinese Academy of Sciences,100039,China 1. Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China2. China Information Technology Security Evaluation Center Beijing 100085 China3. Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiao Tong University Shanghai 200240 China4. State Key Laboratory of Information Security Graduate School of Chinese Academy of Sciences Beijing 100039 China

We present an accountable authority key policy attribute-based encryption (A-KPABE) *** this paper,we extend Goyal's work to key policy attribute-based encryption *** first generalize the notion of accountable authority in key policy attribute-based encryption scenario,and then give a *** addition,our scheme is shown to be secure in the standard model under the modified Bilinear Decisional Diffie-Hellman (mBDDH) assumption.

关键词： accountable authority key policy attribute-based encryption standard model access structure

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A mixed deterministic model for coreference resolution

A mixed deterministic model for coreference resolution

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2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, EMNLP-CoNLL 2012 - Shared Task: Modeling Multilingual Unrestricted Coreference in OntoNotes

作者： Yuan, Bo Chen, Qingcai Xiang, Yang Wang, Xiaolong Ge, Liping Liu, Zengjian Liao, Meng Si, Xianbo Intelligent Computing Research Center Key Laboratory of Network Oriented Intelligent Computation Computer Science and Technology Department Harbin Institute of Technology Shenzhen Graduate School Guangdong Shenzhen518055 China

ISBN: (纸本)9781937284459

This paper presents a mixed deterministic model for coreference resolution in the CoNLL-2012 shared task. We separate the two main stages of our model, mention detection and coreference resolution, into several sub-tasks which are solved by machine learning method and deterministic rules based on multi-filters, such as lexical, syntactic, semantic, gender and number information. We participate in the closed track for English and Chinese, and also submit an open result for Chinese using tools to generate the required features. Finally, we reach the average F1 scores 58.68, 60.69 and 61.02 on the English closed task, Chinese closed and open tasks. © 2012 Association for Computational Linguistics.

关键词： Semantics

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Explore Chinese Encyclopedic Knowledge to Disambiguate Person Names 2

Explore Chinese Encyclopedic Knowledge to Disambiguate Perso...

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2nd CIPS-SIGHAN Joint Conference on Chinese Language Processing, CLP 2012

作者： Liu, Jie Xu, Ruifeng Lu, Qin Xu, Jian Key Laboratory of Network Oriented Intelligent Computation Shenzhen Graduate School Harbin Institute of Technology China Department of Computing Hong Kong Polytechnic University Hong Kong Hong Kong

This paper presents the HITSZ-PolyU system in the CIPS-SIGHAN bakeoff 2012 Task 3, Chinese Personal Name Disambiguation. This system leveraged the Chinese encyclopedia Baidu Baike (Baike) as the external knowledge to disambiguate the person names. Three kinds of features are extracted from Baike. They are the entities’ texts in Baike, the entities’ work-of-art words and titles in the Baike. With these features, a Decision Tree (DT) based classifier is trained to link test names to nodes in the NameKB. Besides, the contextual information surrounding test names is used to verify whether test names are person name or not. Finally, a simple clustering approach is used to group NIL test names that have no links to the NameKB. Our proposed system attains 64.04% precision, 70.1% recall and 66.95% F-score. © 2021 CLP 2012 - 2nd CIPS-SIGHAN Joint Conference on Chinese Language Processing. All Rights Reserved.

关键词： Decision trees

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