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Medical Imaging 2010 - Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Feng, Jinchao Jia, Kebin Tian, Jie Qin, Chenghu Zhu, Shouping College of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences P. O. Box 2728 Beijing 100190 China Life Science Research Center Xidian University Xi'an 710071 China

ISBN: (纸本)9780819480279

Multispectral bioluminescence tomography is becoming a promising tool because it can resolve the biodistibution of bioluminescent reporters associated with cellular and subcellular function through several millimeters with to centimeters of tissues in vivo. Generally, to recover the bioluminescent sources, the source reconstruction problem is formulated as a nonlinear least-squares-type bounds constrained optimization problem. However, bioluminescence tomography (BLT) is an ill-posed problem. For the sake of stability and uniqueness of BLT, many algorithms have been proposed to regularize the problem, such as L2 norm and L1 norm. Here, we proposed a new regularization method with Huber function to regularize BLT problem to obtain robustness like L1 and rapid convergence of L 2. Furthermore, the computational burden is largely increased with the use of spectral data. Therefore, there is a critical need to develop a fast reconstruction algorithm for solving multispectral bioluminescence tomography. In the paper, a limited memory quasi-Newton algorithm for solving the large-scale optimization problem is proposed to fast localize the bioluminescent source. In the numerical simulation, a heterogeneous phantom was used to evaluate the performance of the proposed algorithm with the Monte Carlo based synthetic data. Additionally, the real mouse experiments were conducted to further evaluate the proposed algorithm. The results demonstrate the potential and merits of the proposed algorithm. © 2010 Copyright SPIE - The International Society for Optical engineering.

关键词： Constrained optimization

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Study of feature-based image capturing and recognition algorithm

Study of feature-based image capturing and recognition algor...

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作者： Kao, Chih-Hong Hsieh, Sheng-Ping Peng, Chih-Cheng Aeronautical Systems Research Division Chung-Shan Institute of Science and Technology Taiwan Department of Electrical Engineering National Chung-Hsing University Taichung Taiwan Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Ph.D. Program in Electrical and Communications Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9781424474530

In the field of applied computer vision, the three-dimensional (3D) object recognition is a very important technique which can be used to determine objects from a certain direction of the image for arbitrary 3D objects. These skills are useful in military applications, such as moving target recognition and coastal surveillance. Computer vision recognition allows fast response and all day long reconnaissance. The purpose of establishing a ship recognition system is to research and develop effective ship contour capture in the natural sea environment. We can develop a ship recognition system that is reliable and fast based on a database of ship images. We propose a recognition algorithm for ship images. This system utilizes gradient vector flow to capture the ship image contour first and calculates the geometric eigenvalue using this contour and Fourier descriptor. The eigenvalues are used to perform separate rough and detailed recognition. A graphic user interface is developed and the validity of the proposed technique is demonstrated using identifying images. ©ICROS.

关键词： Ships

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Decentralized diagnosis of Petri nets

Decentralized diagnosis of Petri nets

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American Control Conference

作者： Maria Paola Cabasino Alessandro Giua Andrea Paoli Carla Seatzu Department of Electrical and Electronic Engineering University of Cagliari Piazza D'Armi 09123 Cagliari Italy Center for Research on Complex Automated Systems - Department of Electronic Computer Science and Systems University of Bologna Via Risorgimento 2 40136 Bologna Italy

ISBN: (纸本)9781424474264

In this paper we deal with the problem of failure diagnosis of discrete event systems with decentralized information. The decentralized architecture that we use is composed by a set of sites communicating their diagnosis information with a coordinator that is responsible of detecting the occurrence of failures in the system. In particular, we define two protocols that differ for the amount of information exchanged between the local sites and the coordinator, and the rules adopted by the coordinator to compute the global diagnosis states.

关键词： Coordinator Petri nets Decentralized Fault diagnosis discrete event systems

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On Evaluation of Robust Autonomy for Uninhabited Vehicles and systems

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IFAC Proceedings Volumes 2010年第16期43卷 348-353页

作者： Tristan Perez Alejandro Donaire Brendan P. Willams School of Engineering Discipline of Mechanics and Mechatronics The University of Newcastle Callaghan NSW 2308 AUSTRALIA Centre for Complex Dynamic Systems and Control (CDSC) The University of Newcastle Callaghan NSW 2308 AUSTRALIA Advanced UAS Applications Program Boeing Research & Technology Australia GPO Box 767 Brisbane QLD 4001 AUSTRALIA

This paper discusses a method to quantify robust autonomy of Uninhabited Vehicles and systems (UVS) in aerospace, marine, or land applications. Based on mission-vehicle specific performance criteria, we define an system utility function that can be evaluated using simulation scenarios for an envelope of environmental conditions. The results of these evaluations are used to compute a figure of merit or measure for operational effectiveness (MOE). The procedure is then augmented to consider faults and the performance of mechanisms to handle these faulty operational modes. This leads to a measure of robust autonomy (MRA). The objective of the proposed figures of merit is to assist in decision making about vehicle performance and reliability at both vehicle development stage (using simulation models) and at certification stage (using hardware-in-the-loop testing). Performance indices based on dynamic and geometric tasks associated with vehicle manoeuvring problems are proposed, and an example of a two-dimensional fly scenario is provided to illustrate the use of the proposed figures of merit.

关键词： uninhabited vehicles performance evaluation manoeuvring problem

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Delayed-state-feedback Exponential Stabilization of Stochastic Markovian Jump systems with Mode-dependent Time-varying State Delays

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Acta Automatica Sinica 2010年第11期36卷 1601-1610页

作者： Li MA Fei-Peng DA Ling-Yao WU Key Laboratory of Measurement and Control for Complex Systems of Engineering Ministry of Education Research Institute of Automation Southeast University Nanjing 210096 P.R. China College of Electronic and Information Engineering Jiangsu University Zhenjiang 212013 P.R. China

Abstract In this paper, an improved mean-square exponential stability condition and delayed-state-feedback controller for stochastic Markovian jump systems with mode-dependent time-varying state delays are obtained. First, by constructing a modified Lyapunov-Krasovskii functional, a mean-square exponential stability condition for the above systems is presented in terms of linear matrix inequalities (LMIs). Here, the decay rate can be a finite positive constant in a range and the derivative of time-varying delays is only required to have an upper bound which is not required to be less than 1. Then, based on the proposed stability condition, a delayed-state-feedback controller is designed. Finally, numerical examples are presented to illustrate the effectiveness of the theoretical results.

关键词： Stochastic systems time-varying delay exponential stability Markov chain

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Simulation platform: cloud-computing meets computational neuroscience

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BMC Neuroscience 2011年第1期12卷 1-2页

作者： Tadashi Yamazaki Hidetoshi Ikeno Yoshihiro Okumura Shiro Usui Shunji Satoh Yoshimi Kamiyama Yutaka Hirata Keiichiro Inagaki Akito Ishihara Takayuki Kannon RIKEN BSI-TOYOTA Collaboration Center RIKEN Brain Science Institute Wako Saitama 351-0198 Japan School of Human Science and Environment University of Hyogo Himeji Hyogo 670-0092 Japan Neuroinformatics Japan Center RIKEN Brain Science Institute Wako Saitama 351-0198 Japan Laboratory for Neuroinformatics RIKEN Brain Science Institute Wako Saitama 351-0198 Japan Graduate School of Information Systems University of Electro-Communications Chofu Tokyo 182-8585 Japan School of Information Science and Technology Aichi Prefectural University Nagakute Aichi 480-1198 Japan Faculty of Engineering Chubu University Kasugai Aichi 486-8501 Japan Laboratory for Neuroinformatics (Computational Science Research Program) RIKEN Brain Science Institute Wako Saitama 351-0198 Japan School of Information Science and Technology Chukyo University Toyota Aichi 470-0393 Japan

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An agent-based architecture for knowledge management in context-aware business processes

An agent-based architecture for knowledge management in cont...

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International Conference on Computer Supported Cooperative Work in Design

作者： De C. Gatti, Leonardo A. Santoro, Flávia Maria Nunes, Vanessa T. NP2TEC - Research and Practice Group in Information Technology Department of Applied Informatics Federal University of the State of Rio de Janeiro UNIRIO Rio de Janeiro Brazil COPPE - Systems Engineering and Computer Science Program Federal University of Rio de Janeiro UFRJ Rio de Janeiro Brazil

ISBN: (纸本)9781424467631

The main knowledge management challenges are to capture, store and reuse contextual knowledge generated during interactions that occur daily in an organization. In this paper, we propose an activity context-aware architecture to support knowledge management in working processes. The required features for this architecture are processing, reasoning and sharing contextual knowledge involving information about activities performed. We also present results from evaluation of our proposal - A-CoBrA - for a specific domain. © 2010 IEEE.

关键词： Knowledge management

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Individual-based simulation of sexual selection: A quantitative genetic approach

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Procedia Computer Science 2010年第1期1卷 2003-2011页

作者： D. van Dijk P.M.A. Sloot J.C. Tay M.C. Schut Computational Science University of Amsterdam Sciencepark 107 1098 XG Amsterdam The Netherlands Evolutionary and Complex Systems Program School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore Department of Artificial Intelligence Vrije Universiteit Amsterdam 1081 HV Amsterdam The Netherlands

Sexual selection has been mathematically modeled using quantitative genetics as well as population genetics. Two-locus simulation models have been used to study the evolution of male display and female preference. We present an individual-based simulation model of sexual selection in a quantitative genetic context. We show that under certain conditions Fisherian self-reinforcing sexual selection takes effect, predicted by Lande’s analytic model of female choice. We also show that the dynamics involved in the co-evolution of male display and female preference is much more complex than mathematics would predict. We therefore argue that the study of sexual selection through individual-based simulation could give new and more realistic insight into a world dominated by overly simplified equations.

关键词： Sexual selection Individual-based modeling Agent-based modeling

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Synthesis and Characterization of Magnetically Controllable Nanostructures Using Different Polymers

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AIP Conference Proceedings 2010年第1期1311卷 20-27页

作者： Rodica Turcu Alexandrina Nan Izabell Craciunescu Cristian Leostean Sergiu Macavei Alina Taculescu Oana Marinica Camelia Daia Ladislau Vekas aDepartment for Physics of Nanostructured Systems National Institute R&D of Isotopic and Molecular Technologies 400293 Cluj‐Napoca Romania bLab. Magnetic Fluids Center for Fundamental and Advanced Technical Research Romanian Academy‐Timisoara Branch 300223 Timisoara Romania cNational Center for Engineering of Systems with Complex Fluids University “Politehnica” Timisoara 300222 Timisoara Romania

We report a comparative study of hybrid nanostructures prepared by using water based magnetic nanofluids and polymers such as poly(N‐isopropylacrylamide) and pyrrole copolymer functionalized with glycyl‐leucine. Design of magnetic nanostructures could be achieved using different synthesis procedures that allow either coating or clustering the magnetic nanoparticles from magnetic fluid by the addition of polymer. Physical‐chemical characteristics of hybrid magnetic nanostructures were investigated by FTIR, TEM, DLS, rotational viscosimetry and magnetization measurements. Functionalized pyrrole copolymer coated magnetite nanoparticles with mean size around 9 nm have superparamagnetic behavior and saturation magnetization value of 65 emu/g_Fe3O4. Clusters of magnetite nanoparticles from the water based magnetic nanofluid were encapsulated into polymeric PNIPA spheres having diameters in the range 50–100 nm. The procedure applied allowed to achieve high magnetic loading of polymeric microspheres, having saturation magnetization value of 41 emu/g. Also, the stable suspension in water of thermoresponsive magnetic microgel, as well as the dried samples shows superparamagnetic behavior. It was evidenced that the thermally induced transition from the swollen to collapsed state of magnetic microgels occurs around 30° C.

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The P3E2 project: The introduction, implementation and evaluation of engineering design integrated across the middle school curriculum

The P3E2 project: The introduction, implementation and evalu...

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2010 ASEE Annual Conference and Exposition

作者： Pizziconi, Vincent Haag, Susan Ganesh, Tirupalavanam Cozort, Lynn Krause, Stephen Tasooji, Amaneh Ramakrishna, B.L. Meldrum, Deirdre Lunt, Brian Valdez, Albert Yarbrough, Victoria Harrington Bioengineering Program Fulton School of Engineering Arizona State University United States Research and Evaluation for CRESMET Arizona State University United States Department of Engineering Education Arizona State University United States Department of Academic Operations School of Mechanical Aerospace Chemical and Materials Engineering Arkansas State University United States School of Materials Arizona State University United States Materials Program Fulton School of Engineering Arizona State University United States Center for Ecogenomics Biodesign Institute United States Ira A. Fulton Schools of Engineering Arizona State University United States Harrington Bioengineering Program School of Biological and Health Systems Engineering Arizona State University United States

The Partnership, Pathway, and Pipeline for engineering Education (P 3E2) Project is an exploratory collaboration between ASU engineering faculty and Santan Junior High School teachers from a broad range of subjects and local community members aimed at engaging middle school students in real world and grade-relevant engineering activities as a way of enriching the value of their STEM education as it relates to STEM careers and their broad societal relevance. Central to the P3E2 project is the introduction of engineering design across the curricula via the implementation of the engineering design process through engineering service-learning projects that are intended to facilitate integrated learning of science, math, social studies and language arts. Such STEM-based integrated activities have been co-developed in partnership with middle school teachers and are designed to engage students and captivate their interest while promoting problem-solving and entrepreneurial skills by addressing real world needs in their local communities. This one-year pilot project consisted of four key phases that were implemented in nearly equal quarters, i.e., (a) the creation of a vibrant partnership to assess, motivate and inform teachers and counselors about engineering and its societal connections, workforce barriers, and curricular relevance, (b) the development of a viable education pathway to successfully engage 8th grade students in the full spectra of STEM-based learning that captivate their interest through integrated activities that span across science, mathematics, language arts and social studies, (c) the implementation of semester-long science and engineering fair projects chosen by students who were mentored by ASU engineering undergraduate and graduate students and (d) the evaluation of the P3E2 program effectiveness using designated assessment tools that were developed and administered to the teachers and students at the middle school. The major findings and the lessons

关键词： Students

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