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International Conference on computer and Information Technology (CIT)

作者： Bo Wu Xiaokang Zhou Qun Jin Fuhua Lin Henry Leung Graduate School of Human Sciences Waseda University Tokorozawa Japan School of Computing and Information Systems Athabasca University Edmonton Canada Department of Electrical and Computer Engineering University of Calgary Calgary Alberta Canada

ISBN: (纸本)9781479962402

With the popularity of Social Network Service (SNS) and the increasing of users, individuals' social roles in a social network have become more and more important in recommendation of the personalized services, and in a collective decision-making process as well. In an SNS system, active users may not represent the major opinions among the whole users, and most of the users' opinions may be multifarious. In this study, we consider users' social roles as an important element to support the collective decision-making process. After introducing the social choice theories and collective decision-making model, we present a three-layer model to analyze users' social roles in a hierarchical way, and utilize it to support the collective decision-making process. A case study for COD (Course-Offering Determination) with an application scenario is demonstrated to show the process of how users' social roles are utilized to support the collective decision-making.

关键词： Decision making Analytical models Educational institutions Social network services Multi-agent systems Computational modeling Autonomous agents

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8717 LNAI卷 VI页

作者： Mistry, Michael Leonardis, Aleš Witkowski, Mark Melhuish, Chris University of Birmingham School of Computer Science Edgbaston Birmingham United Kingdom Imperial College London Circuits and Systems Group Department of Electrical and Electronic Engineering London United Kingdom University of the West of England Faculty of Computing Engineering and Mathematical Sciences Bristol United Kingdom

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Virus-like-particles for next generation micro/nano-biosensors

Virus-like-particles for next generation micro/nano-biosenso...

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2014 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2014

作者： Fan, X.Z. Naves, L. Siwak, N.P. Brown, A. Culver, J. Ghodssi, Reza MEMS Sensors and Actuators Laboratory Departments of Electrical and Computer Engineering Institute for Systems Research University of Maryland College ParkMD20742 United States Institute for Bioscience and Biotechnology Research University of Maryland College ParkMD20742 United States Fischell Department of Bioengineering University of Maryland College ParkMD20742 United States

ISBN: (纸本)9781940470016

A novel Virus-like-particle (VLP) bioreceptor layer has been integrated with an optical microdisk resonator platform for biosensing applications. This bioreceptor layer can be genetically programmed for selective binding. An optical microdisk resonator has been functionalized for antibody binding with this receptor, demonstrating resonant frequency shifts of (Δfo) of 0.79 nm and 5.95nm after primary antibody binding and full enzyme linked immunosorbent assay (ELISA), respectively. These shifts are more than 300% higher compared to the non-specific binding of a control (non-conjugated) bioreceptor layer. The sensitivity of the optical resonator to detect primary antibody binding without the additional ELISA steps demonstrates the feasibility of this platform for rapid and simplified immunoassays on a chip. © 2014TRF.

关键词： Actuators

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Implementation and test of human-operated and human-like adaptive impedance controls on Baxter robot

Implementation and test of human-operated and human-like ada...

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15th Annual Conference on Advances in Autonomous Robotics systems, TAROS 2014

作者： Liang, Peidong Yang, Chenguang Wang, Ning Li, Zhijun Li, Ruifeng Burdet, Etienne Centre for Robotics and Neural Systems School of Computing and Mathematics Plymouth University United Kingdom MOE Key Lab. of Autonomous System and Network Control College of Automation Science and Engineering South China University of Technology China State Key Laboratory of Robotics and System Harbin Institute of Technology China Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong Department of Bioengineering Imperial College of Science Technology and Medicine London United Kingdom

ISBN: (纸本)9783319104003

This paper presents an improved method to teleoperate impedance of a robot based on surface electromyography (EMG) and test it experimentally. Based on a linear mapping between EMG amplitude and stiffness, an incremental stiffness extraction method is developed, which uses instantaneous amplitude identified from EMG in a high frequency band, compensating for non-linear residual error in the linear mapping and preventing muscle fatigue from affecting the control. Experiments on one joint of the Baxter robot are carried out to test the approach in a disturbance attenuation task, and to compare it with automatic human-like impedance adaptation. The experimental results demonstrate that the new human operated impedance method is successful at attenuating disturbance, and results similarly to as automatic disturbance attenuation, thus demonstrating its efficiency. © 2014 Springer International Publishing.

关键词： Stiffness

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Bayesian networks to support the management of patients with ASCUS/LSIL pap tests

Bayesian networks to support the management of patients with...

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EAI International Conference on Wireless Mobile Communication and Healthcare (Mobihealth)

作者： Panagiotis Bountris Charalampos Tsirmpas Maria Haritou Abraham Pouliakis Petros Karakitsos Dimitrios Koutsouris The Biomedical Engineering Laboratory School of Electrical and Computer Engineering National Technical University of Athens Athens Greece The Institute of Communication and Computer Systems National Technical University of Athens Athens Greece The Department of Cytopathology University of Athens Athens Greece

In the majority of cases, cervical cancer (CxCa) develops as a result of underestimated abnormalities in the Pap test. Nowadays, there are ancillary molecular biology techniques providing important information related to CxCa and the Human Papillomavirus (HPV) natural history, including HPV DNA test, HPV mRNA tests and immunocytochemistry tests. However, these techniques have their own performance, advantages and limitations, thus a combinatorial approach via computational intelligence methods could exploit the benefits of each method and produce more accurate results. In this paper we present a risk assessment model based on a Bayesian Network which, by combining the results of Pap test and ancillary tests, may identify women at true risk of developing cervical cancer and support the management of patients with ASCUS or LSIL cytology. The model, following the paradigm of other implemented systems, can be integrated into existing platforms and be available on mobile terminals for anytime/anyplace medical consultation.

关键词： Bayes methods Educational institutions DNA Inference algorithms Risk management Neoplasms Accuracy

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Positive Stabilization with Maximum Stability Radius for Linear Time-Delay systems

Positive Stabilization with Maximum Stability Radius for Lin...

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IEEE Annual Conference on Decision and Control

作者： B. Shafai A. Oghbaee T. Tanaka department of Electrical and computer Engineering Northeastern University Boston MA 02115 USA LIDS (Laboratory for Information and Decision Systems) Massachusetts Institute of Technology Cambridge MA 02139 USA

ISBN: (纸本)9781467360890

This paper considers the problem of positive stabilization of uncertain linear time-delay systems by state feedback such that the resulting closed-loop system attains maximum stability radius with positivity constraint. First, we focus on the class of linear continuous-time positive delay systems (Metzlerian delay systems) and outline its interesting properties. Using the stability properties associated with this class, we formulate a constrained stabilization problem for the linear time delay system and provide conditions for the existence of controllers satisfying the stability and Metzlerian constraints. The Metzlerian stabilization is solved using Linear Matrix Inequality (LMI) or Linear Programming (LP). Next, we characterize the uncertainties associated with the positive delay systems and define the stability radius associated with this class which can be expressed in a closed form. Finally, we combine Metzlerian stabilization with maximum stability radius with the aid of bounded real lemma (BRL) and provide a complete solution using LMI. Examples are included for the purpose of illustration.

关键词： Delay systems linear time-delay system uncertain linear time-delay systems State feedback Induction loop systems

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Estimation of a class of stochastic switching neural networks with sensor saturations through a nonsynchronous filter

Estimation of a class of stochastic switching neural network...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Lixian Zhang Yanzheng Zhu Weixing Zheng Yusong Leng Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin China Department of Electrical and Computer Engineering The Ohio State University Columbus USA School of Computing Engineering and Mathematics University of Western Sydney Sydney NSW Australia

In this paper, the problem of energy-to-peak state estimation for a class of discrete-time Markov jump recurrent neural networks (RNNs) with randomly occurring sensor saturations is investigated. A practical phenomenon of nonsynchronous jumps between RNNs modes and desired mode-dependent filters is considered and a nonstationary mode transition among the filters is used to model the non-synchronous jumps to different degrees that are also mode-dependent. The sensor saturation occurs in a probabilistic way according to a Bernoulli sequence. Sufficient conditions on the existence of the nonsynchronous filters are obtained such that the filtering error system is stochastically stable and achieves a prescribed energy-to-peak performance index. A numerical example is presented to verify the theoretical findings.

关键词： Markov processes Performance analysis Recurrent neural networks Neurons Manganese State estimation

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Sharpening Timing-Metrics for Auto-Correlation Based Coarse Symbol Synchronization in OFDM systems

Sharpening Timing-Metrics for Auto-Correlation Based Coarse ...

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IEEE International Conference on Communications

作者： Fan Yang Xi Zhang School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu China Department of Electrical and Computer Engineering Texas A&M University Networking and Information Systems Laboratory TX USA

The auto-correlation based coarse symbol timing scheme yields good correlation timing-metric for wireless orthogonal frequency division multiplexing (OFDM) systems under independent Rayleigh fading channels. However, it generates a plateau in its timing-metric due to the structure of the preamble added with cyclic prefix (CP). Inherently, the mean square error (MSE) performance of a coarse symbol timing scheme is closely related to the sharpness of its main-lobe timing-metric. Some of the literatures focus on polishing the auto-correlation timing-metrics to find the frame start point. One of the well-known methods uses arithmetic mean of the auto-correlation timing-metrics to generate a peak after post-processing. We propose a post-processing scheme using weighted arithmetic mean of the auto-correlation timing-metrics, and provide a different viewpoint of analyzing the performance of post-processing schemes in additive white Gaussian noise (AWGN) channels, which may be helpful in timing-metric design. By using the knowledge of root mean square (rms) delay spread, we get a general coarse symbol timing scheme for both AWGN and Rayleigh fading channels. The obtained simulation results indicate that the MSE performance of the post-processing scheme is a function of the main-lobe sharpness.

关键词： OFDM Delays AWGN channels Correlation Fading

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Using high-level synthesis to build memory and datapath optimized DSP accelerators

Using high-level synthesis to build memory and datapath opti...

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IEEE International Conference on Electronics, Circuits and systems (ICECS)

作者： Dionysios Diamantopoulos George Economakos Dionysios Reisis National Technical University of Athens School of Electrical and Computer Engineering Microprocessors and Digital Systems Laboratory Zografou Athens Greece Physics Department Electronics Laboratory National and Kapodistrian University of Athens Zografou Athens Greece

High-Level Synthesis (HLS) has been a hot research topic for more than 30 years. During this long period, HLS has found many enthusiasts and also critics as well. Both of them have presented a lot of arguments for and against, which have helped HLS mature a lot. Modern HLS environments are not restricted to heuristic optimizations of abstract functional blocks (adders and multipliers) as early approaches where, but are supported by rich, technology characterized component libraries, are integrated with other tool flows for simulation, synthesis, verification and prototyping, and their output can be efficiently installed in advanced multicore System-on-Chip (SoC) architectures. As a consequence, the optimization objectives are no longer only the number of abstract components, but technology dependent real implementation measurements, taken in a fast and accurate manner. In this paper, a modern HLS environment is used to investigate different architecture alternatives for the design of Digital Signal Processing (DSP) hardware accelerators, taking into account both memory and datapath component utilization, as well as SoC connectivity opportunities. The whole investigation is performed at the algorithmic level, using algorithmic constructs and directives to describe different architectural options in an abstract yet precise and high productive way. Experimental results show that correct architectural option selections can lead to more than 100X speedup, with little (practical negligible) resource utilization overhead.

关键词： Table lookup Hardware System-on-chip Field programmable gate arrays Software Digital signal processing

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Fabrication and characterization of a GaN/(4H)SiC vertical pn power diode using direct and interfaced epitaxial-growth approaches

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Journal of Semiconductors 2013年第4期34卷 20-23页

作者： Bose Srikanta Mazumder S K Laboratory for Energy and Switching-Electronics Systems Department of Electrical and Computer EngineeringUniversity of Illinois at ChicagoChicagoIL:60607USA

We report the fabrication and characterization of a vertical pn power diode which is realized using two separate epitaxial-growth mechanisms：（a） p-GaN over p-（4H）SiC, and （b） p-GaN over n-（4H）SiC with A1N as the interface layer. In all of the cases, n＋-doped （4H）SiC serves as the cathode substrate. Pd（200 A）/Au（10000 A） is used for the anode contact while Ni（1000A） is used for the bottom cathode contact. The measured forward drop of the pn diode with A1N as the interface material is found to be around 5.1 V; whereas, it is 3 V for the other sample structure. The measured reverse-blocking voltage is found to be greater than 200 V.

关键词： GaN （4H）SiC vertical pn power diode power electronics

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