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A two-level mixed service polling model with batch arrival

A two-level mixed service polling model with batch arrival

引用

international conference on Network Security and Communication Engineering, NSCE 2014

作者： Guan, Z. Qian, W.H. Wang, Y.Q. School of Information Science and Technology Yunnan University KunmingYunnan China State Grid Shanghai Changxing Electric Power Supply Company Shanghai China

ISBN: (纸本)9781138028210

We present a single-server and two-level mixed service polling systems with two queue types, one center queue and N normal queue. Customers arrive at the system according to a batch process. The center queue will be successively served with exhaustive discipline after each normal queue being served with parallel 1-limited discipline. In the first level, server visits between the center queue and the normal queue. In the second level, normal queues are polled by a cyclic order. We propose an imbedded Markov chain framework to drive the closed-form expressions for the mean queue length and average waiting time. Numerical examples demonstrate that theoretical and simulation results are identical and the new system efficiently differentiates priorities. © 2015 Taylor & Francis Group, London.

关键词： Markov processes

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Analysis of the Impact of Denial of service Attacks on Centralized Control in Smart Cities 1

引用

8th international Wireless Internet conference (WICON)

作者： Logota, Evariste Mantas, Georgios Rodriguez, Jonathan Marques, Hugo Inst Telecomunicacoes Aveiro Portugal

ISBN: (数字)9783319188027

ISBN: (纸本)9783319188027;9783319188010

The increasing threat of Denial of service (DoS) attacks targeting Smart City systems impose unprecedented challenges in terms of service availability, especially against centralized control platforms due to their single point of failure issue. The European ARTEMIS co-funded project ACCUS (Adaptive Cooperative Control in Urban (sub) systems) is focused on a centralized Integration and Coordination Platform (ICP) for urban subsystems to enable real-time collaborative applications across them and optimize their combined performance in Smart Cities. Hence, any outage of the ACCUS ICP, due to DoS attacks, can severely affect not only the interconnected subsystems but also the citizens. Consequently, it is of utmost importance for ACCUS ICP to be protected with the appropriate defense mechanisms against these attacks. Towards this direction, the measurement of the performance degradation of the attacked ICP server can be used for the selection of the most appropriate defense mechanisms. However, the suitable metrics are required to be defined. Therefore, this paper models and analyzes the impact of DoS attacks on the queue management temporal performance of the ACCUS ICP server in terms of system delay by using queueing theory.

关键词： Smart city security Denial of service attacks Security modeling Queueing theory

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A Modeling Framework for Resource service Sharing in a Cloud Manufacturing system

A Modeling Framework for Resource Service Sharing in a Cloud...

引用

IFIP WG 5.7 international conference on Advances in Production Management systems (APMS)

作者： Liu, Yongkui Xu, Xun Zhang, Lin Tao, Fei Univ Auckland Dept Mech Engn Auckland 1 New Zealand Beihang Univ Sch Automat Sci & Elect Engn Beijing 100191 Peoples R China Xidian Univ Ctr Complex Syst Sch Mechanoelect Engn Xian 710071 Peoples R China

ISBN: (纸本)9783319227597

Cloud manufacturing (CMfg) is a novel business paradigm with resource service (RS) sharing being one of the most important purposes. From the perspective of enterprise business interactions, how to achieve full RS sharing is an important research issue in CMfg as it plays a critical role in enhancing the performance and efficiency of a CMfg system. However, the research on CMfg RS sharing is challenged by the complexity of a CMfg system, mainly coming from the vast number of involved enterprises and their complex business interactions. In this paper, we propose a modeling framework for CMfg RS sharing by regarding a CMfg system as a complex system and elaborating the problem from the perspective of complex systems modeling and simulation. We summarize systematically the factors that need to be considered for building a system of CMfg RS sharing, which is followed by the modeling procedure.

关键词： Cloud manufacturing Complex system Modeling framework Resource service sharing

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Context Aware services: A Novel Trend in IoT Based Research in Smart City Project 39

Context Aware Services: A Novel Trend in IoT Based Research ...

引用

39th IEEE Annual international computer Software and Applications conference Workshops (COMPSAC)

作者： Fujiwara, Yashuchika Yamada, Keiji Tabata, Kenichi Oda, Michio Hashimoto, Kazuo Suganuma, Takuo Rahim, Abdur Vlacheas, Panagiotis Stavroulaki, Vera Kelaidonis, Dimitrios Georgakopoulos, Andreas Kokusai Kogyo Co Ltd Tokyo Japan Waseda Univ Ctr Res Strategy Tokyo Japan Tohoku Univ Cyber Sci Ctr Sendai Miyagi Japan Create Net Trento Italy WINGS ICT Solut Athens Greece

ISBN: (纸本)9781467365635

Smart city is rapidly gaining attention, and more than 400 sites are recognized all over the world, as of the year 2012. Smart city is regarded as an urban area where its social/public infrastructure is efficiently managed using the advanced technology such as ICT, environmental science. The original goal was to form a technology basis for low carbon society or efficient community in energy usage, however, the recent concept grows to include resiliency of society and its infrastructure in disastrous situation. This trend is apparent in Japan, especially after the East Japan Great Earthquake in 2011. Smart city is designed as a social infrastructure to share community resources in emergent situations, and to bring efficiency in energy use in a normal situation. This paper introduces typical smart city projects in the world and community services developed under smart city context.

关键词： Smart City Community service Internet of Things

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A new approach for orthogonal representation of lunar contour maps 1

引用

8th international conference on Image and Graphics, ICIG 2015

作者： Lai, Junhao Ye, Ben Cai, Zhanchuan Li, Chuguang Jia, Yu Macau University of Science and Technology Macau China

ISBN: (数字)9783319219783

ISBN: (纸本)9783319219776

Impact craters are typical lunar areas which can reflect the characteristics of lunar surface, so the studies of them are one of the key tasks of lunar exploration. A class of complete orthogonal piecewise polynomials in L2 [0,1] called V-system is introduced in this paper and this new approach can be used to represent the contour lines of lunar DEM data. It is not only introduced for accurately representing the contour lines but also eliminating effectively the Gibbs phenomenon. Based on V-system, there is an algorithm for transferring a given contour to V-spectrum. The proposed algorithm is intuitive, easy and fast. Some examples of lunar contour maps’ representation in V-system are given. © Springer international Publishing Switzerland 2015.

关键词： Lunar missions

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Healthcare Big Data: Challenges and Opportunities 16

Healthcare Big Data: Challenges and Opportunities

引用

Proceedings of the international conference on Big Data and Advanced Wireless Technologies

作者： M-Tahar Kechadi School of Computer Science University College Dublin Belfield Dublin Ireland

ISBN: (纸本)9781450347792

In healthcare sector huge quantities of data about patients and their medical conditions have been gathered through clinical databases and various other healthcare processes. Currently, it records nearly all aspects of care, including patient personal information, clinical trials, hospital records, diagnosis, medication, test results, imaging data, costs, administrative reports, etc. Like in other application domains, the big data revolution holds also great promise in the area of healthcare, as the available data about individual patients is very rich, and hides crucial knowledge that can be exploited to improve patients' care while reducing its cost. For instance, in 2012 worldwide collected healthcare data was estimated to be in the region of 500 petabytes and it is expected to grow 50 times more in 2020 (25 Exabytes). Turning this massive amount of data into knowledge that can be used to identify needs, predict and prevent critical patients' conditions, and help practitioners to make rapid and accurate decisions is not only a desire but is of urgent and crucial necessity. Therefore, healthcare organisations must have the ability to manage and analyse their data in a rapid and efficient manner to answer several critical questions related to diseases, treatments, patients' behaviours, and care management. However, building such system faces huge challenges: 1) data complexity, 2) Privacy, security, ethical, legal, and social issues, and 3) Interoperability, portability, and compatibility. We will discuss all these challenges and the requirements of healthcare ecosystem. This will lead us to describe some innovative methodologies of how to build such ecosystem to face the healthcare challenges of the next decade or so.

关键词： Ecosystems Sensor Data system Design Data Mining Healthcare Data Data Analytics Big data

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Optimization of binomial option pricing on intel MIC heterogeneous system 15th

Optimization of binomial option pricing on intel MIC heterog...

引用

15th international conference on Algorithms and Architectures for Parallel Processing, ICA3PP 2015

作者： Liang, Weihao An, Hong Li, Feng Cheng, Yichao School of Computer Science and Technology University of Science and Technology of China Hefei230026 China

ISBN: (纸本)9783319271361

In these years, computerization has been more and more important in the financial area. The computational intensity and real- time constraints of those financial models require high-throughput parallel architectures. In this paper, optimization of widely-used binomial option pricing model has been implemented on the worlds largest super- computer, Tianhe-2. In our work, we employ several optimizing tech- niques to efficiently utilize the architecture of Intel MIC heterogeneous system to improve the performance. The experimental results show that, compared with the serial implementation, the optimized binomial option pricing achieves 33X speedup on one Intel Xeon CPU and 61X speedup on one Intel Xeon Phi coprocessor. Further experiments on Intel MIC heterogeneous system indicate that our implementation attains a speed- up factor of 254 on one Tianhe-2 computing node. © Springer international Publishing Switzerland 2015.

关键词： Optimization

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Inter-carrier interference self-cancellation for CI/MC-CDMA system

Inter-carrier interference self-cancellation for CI/MC-CDMA ...

引用

international Waveform Diversity and Design conference, WDD 2012

作者： Li, Xue Zhou, Ruolin Zhang, Jian Chakravarthy, Vasu Wu, Zhiqiang Department of Electrical Engineering Wright State University United States Department of Mathematics and Computer Science Texas Woman's University United States Air Force Research Laboratory United States

ISBN: (纸本)9781509005987

Multi-carrier code division multiple access (MC-CDMA) has been considered as a strong candidate for next generation wireless communication system due to its excellent performance in multi-path fading channel and simple receiver structure. Carrier Interferometry code for MC-CDMA (CI/MC-CDMA) provides better BER performance, less peak to average power ratio (PAPR) and higher design flexibility than conventional MC-CDMA systems employing Hadarmard-Walsh spreading code. However, like all the multi-carrier transmission technologies such as orthogonal frequency division multiplexing (OFDM), the inter-carrier interference (ICI) produced by the frequency offset between the transmitter and receiver local oscillators or by Doppler frequency shift due to high mobility causes significant bit error rate (BER) performance degradation in CI/MC-CDMA system. In this paper, we apply the ICI self-cancellation scheme previously proposed for OFDM system to orthogonal CI/MC-CDMA system to reduce ICI effect and improve BER performance. Unlike the traditional ICI self-cancellation scheme for OFDM which reduces the ICI at the price of lowing the transmission rate and reducing the bandwidth efficiency, we introduce a second set of orthogonal CI codes to maintain the throughput. Simulations of different leveled modulations over AWGN channel and multi-path fading channel confirmed the effectiveness and efficiency of the proposed self-embedded ICI cancellation scheme for CI/MC-CDMA system where significant BER performance gain has been observed when ICI is present. © 2012 IEEE.

关键词： Bit error rate

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LQG Control under Denial-of-service Attacks: An Experimental Study 20

LQG Control under Denial-of-Service Attacks: An Experimental...

引用

20th IEEE conference on Emerging Technologies and Factory Automation (ETFA)

作者： Tang, Haiding Lu, Zhouzheng Zhang, Lifu Chen, Yang Cheng, Peng Chen, Jiming Zhejiang Univ State Key Lab Ind Control Technol Hangzhou 310027 Zhejiang Peoples R China Wenzhou Vocat & Tech Coll Wenzhou Peoples R China

ISBN: (纸本)9781467379298

Recently, the industrial wireless protocols have been widely used around the world. However, the unreliable communication media between the sensors and the central controller renders the wireless signal channel vulnerable to many attacks. Various efforts have been devoted to study the influence of specific malicious attacks from the aspect of theoretical investigation based on different assumptions. This paper focuses on verifying the optimal Denial-of-service (DoS) jamming attack strategy on a class of wireless industrial control system from the view of experiments. We first introduce typical control system model and DoS attack model, and an optimal DoS attack schedule against LQG control based on these models. Then, we establish a semi physical security testbed which consists of virtual plant, physical controller and communication process. We also realize wireless DoS attacks by exploiting the USRP device. Through extensive experiments and analysis, we investigate the performance of different DoS attack strategies on the LQG control system over an inverted pendulum.

关键词： DoS attack strategy security testbed LQG control experimental study

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Introducing and analysis of the Windows 8 event log for forensic purposes 5th

Introducing and analysis of the Windows 8 event log for fore...

引用

5th international Workshop on Computational Forensics, IWCF 2012 and 6th international Workshop on Computational Forensics, IWCF 2014

作者： Talebi, Javad Dehghantanha, Ali Mahmoud, Ramlan University Putra Malaysia Seri Kembangan Malaysia School of Computing Science and Engineering University of Salford Manchester United Kingdom

ISBN: (纸本)9783319201245

All operating systems are employing some sort of logging mechanism to track and note users activities and Microsoft Windows is not an exception. Log Analysis is one of the important parts of Windows forensics process. The Windows event log system introducing in Windows NT was released with a new feature for Microsoft Windows family and since then went through several major changes and updates. The event log experienced major updated in Windows 8. This paper first introduces Windows 8 event log format and then proceeds with explaining methods for analyzing the logs for digital investigation and incident handling. The main contributions of this paper are introducing Windows8 logging service and forensic examination of it. © Springer international Publishing Switzerland 2015.

关键词： computer forensics

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