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International Conference on Control Engineering and Communication technology (ICCECT)

作者： Juan Xie Jianfeng Qiu Department of Mathmatics & Physics Anhui University of Architecture Hefei China School of Computer Science and Technology Anhui University Hefei Anhui China

ISBN: (纸本)9781467344999

An new swarm intelligence algorithm based on the behavior of honeybee swarms has been proposed for some years, namely, Artificial Bee Colony(ABC). In this work, ABC is used for optimizing a set of split in a given integration interval by simulating the foraging activities of bees and reflecting the changing trends of the integrand. At the same time, this work also compares the performance of ABC algorithm with that of Trapezoidal, Simpson, Differential Evolution(DE), particle swarm optimization(PSO) for numerical integration. The simulation results show that the mentioned algorithm for numerical integration outperforms the other algorithm.

关键词： Approximation algorithms Vectors Educational institutions Particle swarm optimization Optimization Tin Algorithm design and analysis

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Crafting urban camouflage 12

Crafting urban camouflage

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Designing Interactive Systems Conference, DIS '12

作者： Martin, Karen Dalton, Ben Jones, Matt CASE Kent School of Architecture University of Kent Canterbury CT2 7NR United Kingdom Faculty of Art Environment and Technology Leeds Metropolitan University Leeds LS6 3QL United Kingdom Department of Computer Science College of Science Prifysgol Abertawe Swansea University United Kingdom

ISBN: (纸本)9781450312103

As interactive systems become increasingly entwined with architecture, and spaces become able to detect the presence of individuals, we argue that the control of visibility as a temporary personal state should be considered in the design of public spaces. This workshop will provide the opportunity for participants to engage hands-on with a computer vision tracking system (OpenCV) and explore how low-cost materials and tools can be used to render people invisible in monitored public space. We invite researchers and practitioners from the fields of art, design, HCI, architecture and social science to consider strategies for managing personal visibility and how these relate to design and the use of technologies. The intention of the workshop is not to produce implementable designs. Instead we prefer to make speculative design scenarios that might act as future inspiration or critique. By focusing on practical strategies for managing personal visibility we hope to extend designers thinking of presence in public space beyond the purely physical to include digital representations of inhabitation that are processed and archived remotely. © 2012 Authors.

关键词： Visibility

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Combining gait research of the quadruped/biped reconfigurable walking chair with parallel leg mechanism

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4th International Conference on Social Robotics, ICSR 2012

作者： Hu, Xing Wang, Hongbo Sang, Lingfeng Gu, Qifang Yuan, Lin School of Mechanical and Electrical Engineering Xi'an University of Architecture and Technology Xi'an Shanxi 710055 China Ministry of Education Key Laboratory of Advanced Forging Technology and Science Hebei Province Key Laboratory of Parallel Robot and Mechatronics Systems Yanshan University Qinhuangdao Hebei 066004 China Department of Computer Wuxi City College of Vocational Technology Wuxi 214063 China

ISBN: (纸本)9783642341021

The quadruped/biped reconfigurable walking robot with parallel leg mechanism can realize not only the quadruped walking, but also the biped walking. The converting process from the quadruped to the biped includes locking the vertical revolute pair hinged with the upper platform and combining the corresponding lower platforms. Based on the previous study, the combining schemes of walking chair are researched in this paper, and then the correctness of the combining schemes is analyzed by using the position workspace of the swing leg and the body mechanism in different states which are obtained by the MATLAB software and anti-solution search method. Compared with the stability margin and the adjustment coordination of the body in the different combining schemes, the optimal combining gaits of walking chair are selected, which lays the theoretical foundation for the quadruped/biped converting control of walking chair. © 2012 Springer-Verlag.

关键词： MATLAB

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Exploiting machine learning for intelligent room lighting applications

Exploiting machine learning for intelligent room lighting ap...

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International IEEE Conference on Intelligent Systems, IS

作者： Aravind Kota Gopalakrishna Tanir Özçelebi Antonio Liotta Johan J. Lukkien Department of Mathematics and Computer Science System Architecture and Networking Netherlands Electro-Optical Communications Department of Electrical Engineering Eindhovan University of Technology Netherlands

Research has shown that environment lighting influences the behavior of the employees in an office setting highly, making lighting configuration in an office space crucial. A breakout area may be used by the employees for various activities that need to be supported by different lighting conditions, e.g. informal meetings or personal retreat. The desired lighting conditions depend on user preferences and other contextual data observable in the environment. In this paper, we introduce a new method for building prediction models to provide intelligent lighting in our pilot breakout area. Based on a set of pre-defined features that are expected to have influence on the users' choice in selecting a desired lighting environment, we introduce a probabilistic model for generating synthetic data. We also discuss and compare the performances of various rule-based classification models on the synthetic data and find `DecisionTable' to be the most suitable model for our pilot implementation. We study the influence of the training set size (number of samples) on various classification models and the influences of individual features through simulations. We present empirical results based on the synthetic dataset and a roadmap for future research.

关键词： Lighting Data models Prediction algorithms Accuracy Training Predictive models Classification algorithms

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Treatment of Missing Data in Intelligent Lighting Applications

Treatment of Missing Data in Intelligent Lighting Applicatio...

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing, UIC-ATC

作者： Aravind Kota Gopalakrishna Tanir Özçelebi Antonio Liotta Johan J. Lukkien System Architecture and Networking (SAN) Department of Mathematics and Computer Science Eindhoven University of Technology The Netherlands Electro-Optical Communications Department of Electrical Engineering Eindhoven University of Technology The Netherlands

The concept of intelligent lighting facilitates the use of machine learning models to adapt the lighting application behavior based on changing context. Ideally, a complete dataset without missing values is used to train the learning algorithm. Nevertheless, it is common to have missing data values in the dataset, e.g. due to lack of rich enough user interfaces such as smart phones. In this paper, we study various probabilistic approaches to treat missing feature values in a dataset collected from an office breakout area. This dataset is used to train the learning model to provide intelligent lighting solutions. We evaluate the performance of five different approaches by simulation, using four rule-based classification algorithms and various proportions of missing data. We find that none of these approaches gives best performance over the necessary range of conditions, and that an adaptive strategy is more suited.

关键词： Lighting Probabilistic logic Training Data models Computational modeling Adaptation models Smart phones

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Breakout 404: A smart space implementation for lighting services in the office domain

Breakout 404: A smart space implementation for lighting serv...

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International Conference on Networked Sensing Systems (INSS)

作者： Serge Offermans Aravind Kota Gopalakrishna Harm van Essen Tanir Özçelebi Intelligent Lighting Institute (ILI) Department of Industrial Design Eindhovan University of Technology Netherlands System Architecture and Networking (SAN) Department of Mathematics and Computer Science Eindhovan University of Technology Netherlands

Smart spaces provide enhanced user experience through sensing and adaptation to changing context. Hence, they allow distributed applications to show intelligent, autonomous and interactive behavior. Two important research topics within this field are machine learning and human-system interaction. This paper introduces a pilot smart space implementation on top of a Wireless Sensor and Actuator Network (WSAN) infrastructure that is specifically intended to investigate these two aspects. We investigate a scenario built around an office breakout area context. We describe the infrastructure setup, the novel user interfaces, the network architecture and the message exchange policies of the pilot implementation. We employ the opportunities of modern lighting systems in the proposed implementation.

关键词： Lighting Machine learning Wireless sensor networks Atmosphere Wireless communication Context Actuators

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DLWAP-buffer: A Novel HW/SW architecture to Alleviate the Cache Coherence on Streaming-like Data in CMP

DLWAP-buffer: A Novel HW/SW Architecture to Alleviate the Ca...

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IEEE International Symposium on Embedded Multicore Socs (MCSoC)

作者： Xiaoping Huang Xiaoya Fan Shengbing Zhang Yuhui Chen School of Computer Science Northwestern Polytechnical University Xi'an China Architecture Design Department XIAN GUIDE TECHNOLOGY Company Limited Xi'an China

In shared-memory Chip Multiprocessor (CMP), shared data between different cores must be exchanged through the last-level-shared-cache and cache coherence must be maintained at the same time. As the number of cores increase, the cache coherence wall has become more and more serious. As for the multimedia applications full of streaming-like data, existing multicore cache coherence protocols show lower performance and cannot meet the timeliness. In the paper, considering the poor temporal locality and high real-time characteristics of the multimedia data, we propose the distributed light-weight active-push buffer (DWALP-buffer) architecture to alleviate the cache coherence latency on streaming-like data in CMP. The architecture introduces a dedicated shared-data exchange channel between adjacent cores. The channel bridges the internal register files and reduces the shared-data communication latency. Supported by the control protocol, the architecture can adaptively balance the rate mismatch in producer-consumer pipeline model. We build a quad-core CMP simulation platform with the DWLAP-buffers. Our experiment indicates that comparing with the last-shared-level-cache method the architecture can improve the average performance by 13% and alleviate the snooping operations caused from maintaining cache coherence by 26%.

关键词： Coherence computer architecture Multimedia communication Instruction sets Registers Pipelines Protocols

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Delay-bounded Sink Mobility in Wireless Sensor Networks

Delay-bounded Sink Mobility in Wireless Sensor Networks

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IEEE International Conference on Communications

作者： Yu Gu Yusheng Ji Jie Li Biao Han Baohua Zhao Information Systems Architecture Science Research Division National Institute of Informatics Department of Computer Science University of Tsukuba Tsukuba Science City State Key Laboratory of Networking and Switching Technology

ISBN: (纸本)9781457720529

This paper exploits sink mobility to prolong the network lifetime in wireless sensor networks (WSNs) where the information delay caused by moving the sink should be bounded. We build a unified framework for analyzing this joint sink mobility and routing problem. We offer a mathematical modeling that is general and captures diversified issues, e.g. sink mobility, routing, delay, etc. We discuss the induced subproblems and present efficient solutions for them. Then, we generalize these solutions and propose a polynomial-time optimal algorithm for the origin problem. In simulations, we show the benefits of involving a mobile sink. We also show that the impact of the delay bound on the network lifetime.

关键词： Sinks Wireless sensor networks Routing Problem mobility mathematical modeling

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Hidden conditional random fields for category and scene classification

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Journal of Computational Information Systems 2012年第2期8卷 877-885页

作者： Jin, Taisong Li, Lingling Li, Pifan Li, Yuan School of Information Science and Technology Xiamen University Xiamen 361005 China Department of Computer Science and Application Zhengzhou Institute of Aeronautical Industry Management Zhengzhou 450015 China School of Architecture and Civil Engineering Xiamen University Xiamen 361005 China

This paper proposes a novel category and scene classification framework using the Hidden Conditional Random Fields (HCRFs) model. The main advantage of the proposed framework is its ability to combines both large-scale global features and local patch features and incorporate a rich set of interactions to distinguish different categories and scenes. Given these representations, classification is done using Hidden Conditional Random Fields where it learns a set of hidden variable and observations need not be independent. Experiments on the dataset show that the proposed framework significantly outperforms the baseline approaches. 1553-9105/Copyright © 2012 Binary Information Press.

关键词： Random processes

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Improved cryptanalysis of the VMPC stream cipher

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Journal of Computational Information Systems 2012年第2期8卷 831-838页

作者： Li, Shunbo Hu, Yupu Zhao, Yongbin Wang, Yan Department of Mathematics Xidian University Xi'an 710071 China Key Lab. of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China School of Science Xi'an University of Architecture and Technology Xi'an 710055 China

VMPC is a modified RC4 stream cipher proposed in FSE 2004, which is designed especially to resist distinguishing attacks. In this paper, we present a heuristic distinguishing attack against VMPC. By finding the weakness in the first two words of a keystream with two effective assumptions, we build a distinguisher and get a considerable bias. This attack only requires about 234.02 output bytes to distinguish VMPC from truly random sequence with success probability 0.9545. Thereby, this technique is further used to the Tsunoo's method and improve his results by a factor of about 24. 1553-9105/Copyright © 2012 Binary Information Press.

关键词： Cryptography

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