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IEEE International Conference on Robotics and Biomimetics

作者： Fan Yang Zeng-Guang Hou Shao-Hua Mi Gui-Bin Bian Xiao-Liang Xie State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781479973989

Percutaneous transluminal coronary angioplasty (PTCA) has been proved to be a standard solution to most cardiovascular diseases (CVDs). The surgical simulator provides the trainees a new vehicle to learn this skill much more conveniently and effectively. The blood vessel model is at the core of the virtual environment. In this paper, a robust and semi-automatic approach to segment the abdominal aorta from the computed tomography angiography (CTA) is developed. The proposed approach employs the geodesic active contours method as the main component. The edge potential map is generated by applying nonlinear mapping function. The initial contours are evolved by applyging the fast marching method. The surface information representing the vessel is extracted by the marching cubes method. This approach has been proved successful for the construction of 3-D surface model of the aorta based on the CTA series.

关键词： Image edge detection Level set Biomedical imaging Active contours Mathematical model Image segmentation Computational modeling

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Decentralized control for a class of nonlinear interconnected systems using integral policy iteration

Decentralized control for a class of nonlinear interconnecte...

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World Congress on Intelligent control and Automation (WCICA)

作者： Chao Li Derong Liu Hongliang Li Ding Wang The State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China

In this paper, we establish a decentralized control law to stabilize a class of nonlinear interconnected large-scale systems using a neural-network-based online model-free integral policy iteration algorithm. The model-free approach can solve the decentralized control problem for the interconnected system which has unknown dynamics. The stabilizing decentralized control strategy is derived based on the optimal control policies of the isolated subsystems. The online model-free integral policy iteration algorithm is developed to solve the optimal control problems for the isolated subsystems with unknown system dynamics. The actor-critic technique and the least squares implementation method are used to obtain the optimal control policies. A simulation example is given to verify the applicability of the decentralized control strategy.

关键词： Optimal control Decentralized control Heuristic algorithms Mathematical model Equations Interconnected systems Cost function

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LEARNING CO-OCCURRENCE STROKES FOR SCENE CHARACTER RECOGNITION BASED ON SPATIALITY EMBEDDED DICTIONARY

LEARNING CO-OCCURRENCE STROKES FOR SCENE CHARACTER RECOGNITI...

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IEEE International Conference on Image Processing

作者： Song Gao Chunheng Wang Baihua Xiao Cunzhao Shi Wen Zhou Zhong Zhang The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences

ISBN: (纸本)9781479957521

Robust scene-text-extraction system can be used in lots of areas. In this work, we propose to learn co-occurrence of local strokes for robust character recognition by using a spatiality embedded dictionary (SED). Different from spatial pyramid partitioning images into grids to incorporate spatial information, our SED associates every codeword with a particular response region and introduces more precise spatial information for character recognition. After localized soft coding and max pooling of the first layer, a sparse dictionary is learned to model co-occurrence of several local strokes, which further improves classification performance. Experiment on benchmark datasets demonstrates the effectiveness of our method and the results outperform state-of-the-art algorithms.

关键词： Dictionaries Character recognition Encoding Training Vectors Text recognition Feature extraction

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An 3D interactive virtual reality software toolkit for minimally invasive vascular surgery

An 3D interactive virtual reality software toolkit for minim...

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IEEE International Conference on Mechatronics and Automation

作者： Shaohua Mi Zengguang Hou Fan Yang State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Science Beijing China

Recently, much more attention has been paid to the development of minimally invasive vascular surgery. Simulating behaviors of a catheter/guide wire in a realistic 3D vascular model for minimally invasive vascular surgery is a challenging subject. One of the main problems for an 3D computer-based virtual reality simulator is how to design a software toolkit primarily targeted to medical simulation. In this paper, we describe an 3D interactive virtual reality software toolkit and present an example of application to a virtual minimally invasive vascular surgery procedure. Finally, experimental results are given to show that the 3D interactive virtual reality software toolkit is effective and promising.

关键词： Solid modeling Software Three-dimensional displays Catheters Wires Computational modeling Surgery

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LEARNING ASSOCIATE APPEARANCE MANIFOLDS FOR CROSS-POSE FACE RECOGNITION

LEARNING ASSOCIATE APPEARANCE MANIFOLDS FOR CROSS-POSE FACE ...

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IEEE International Conference on Image Processing

作者： Xue Chen Chunheng Wang Baihua Xiao Xinyuan Cai State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences

ISBN: (纸本)9781479957521

Pose variation is a major challenge in face recognition. In this paper, we propose a novel cross-pose face recognition method by learning associate appearance manifolds to model the connection of faces under different poses. The associate manifolds are built on an auxiliary set, in which each identity contains cross-pose face images. The basic assumption is that cross-pose face images from two similar identities can be projected onto similar appearance manifolds by pose-specific transforms. We first associate the input faces with alike identities from the auxiliary set. Then the manifolds of cross-pose faces in the training set are confined close to that of the associate identities in the auxiliary set. Thus, the connection of cross-pose faces is well modeled by the associate appearance manifolds on the auxiliary set. Formally, we formulate the assumption as a manifold-based distance minimization problem, so as to learn the optimal transforms. Experiments on the Multi-PIE dataset demonstrate the effectiveness of the proposed method.

关键词： Cross-pose Face recognition Associate appearance manifolds

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sEMG-based single-joint active training with iLeg—A horizontal exoskeleton for lower limb rehabilitation

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Lecture Notes in Computer Science

作者： Hu, Jin Hou, Zeng-Guang Peng, Liang Peng, Long Gu, Nong State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100190 China Centre for Intelligent Systems Research Deakin University 75 Pigdons Road Waurn PondsVIC3216 Australia

ISBN: (纸本)9783319126425

In this paper, surface electromyography (sEMG) from muscles of the lower limb is acquired and processed to estimate the singlejoint voluntary motion intention, based on which, two single-joint active training strategies are proposed with iLeg, a horizontal exoskeleton for lower limb rehabilitation newly developed at our laboratory. In damping active training, the joint angular velocity is proportionally controlled by the voluntary effort derived from sEMG, performing as an ideal damper, while spring active training aims to create a spring-like environment where the joint angular displacement from the constant reference is proportionally controlled by the voluntary effort. Experiments are conducted with iLeg and one healthy male subject to validate the feasibility of the two single-joint active training strategies. © Springer International Publishing Switzerland 2014.

关键词： Exoskeleton (Robotics)

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Phototherapy: Metal–Organic‐Framework‐Derived Mesoporous Carbon Nanospheres Containing Porphyrin‐Like Metal Centers for Conformal Phototherapy (Adv. Mater. 38/2016)

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Advanced Materials 2016年第38期28卷

作者： Shunhao Wang Lu Shang Linlin Li Yingjie Yu Chongwei Chi Kun Wang Jie Zhang Run Shi Heyun Shen Geoffrey I. N. Waterhouse Sijin Liu Jie Tian Tierui Zhang Huiyu Liu Beijing Key Laboratory of Bioprocess Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology Beijing 100029 P. R. China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco‐Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Beijing Institute of Nanoenergy and Nanosystems National Center for Nanoscience and Technology (NCNST) Chinese Academy of Sciences Beijing 100083 P. R. China Department of Materials Science and Engineering State University of New York at Stony Brook Stony Brook NY 11790 USA Key Laboratory of Molecular Imaging The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand

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Chaotic simulated annealing algorithm for task allocation in real-time distributed systems

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Journal of Computational Information systems 2014年第20期10卷 8865-8872页

作者： Wu, Wenbo Li, Lin Yao, Xinyu Liu, Baohong State Key Laboratory of Complex Electromagnetic Environment Effects on Electronic and Information System Luoyang China College of Information System and Management National University of Defense Technology Changsha China

This paper addresses the problem of task allocation in real-time distributed systems with the goal of maximizing the system reliability, which has been shown to be NP-hard. Firstly, we take account of the deadline constraint in order to formulate this problem, and then apply chaotic simulated annealing (CSA) algorithm to solve the problem. The CSA introduces chaotic variable to generate the number of perturbations of neighborhood selection in each iteration, which can be more likely to escape from the local minima. The effectiveness of CSA is evaluated by comparing with conventional simulated annealing algorithm. The results show that CSA has a better performance than SA, both higher reliability and less calculation time.

关键词： Simulated annealing

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Output-based high-order bipartite consensus under directed antagonistic networks

Output-based high-order bipartite consensus under directed a...

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IEEE Symposium on Intelligent Agents, IA

作者： Hongwen Ma Derong Liu Ding Wang Hongliang Li The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781479944873

In the presence of negative weights in communication graph, bipartite consensus is an extension of the traditional consensus problems where the communication weights are all positive. An output-based distributed control protocol is established to solve the bipartite consensus of the homogeneous multi-agent systems. Bipartite consensus problem is equivalent to a linear stabilizable and detectable problem by introducing a gauge transformation. If the multi-agent systems can reach the bipartite consensus, then the signed digraph should be structurally balanced and contains a spanning tree. Finally, the implementation provides three cases to validate the effectiveness of our developed criteria.

关键词： Eigenvalues and eigenfunctions Multi-agent systems Protocols Topology Decentralized control Laplace equations

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On mobilizing processes of Cyber Movement Organizations 19

On mobilizing processes of Cyber Movement Organizations

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Wang, Tao Liu, Zhong Cui, Kainan Zhang, Jie Wang, Fei-Yue Philip Chen, C.L. College of Information System and Management National University of Defense Technology Changsha410073 China State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing100190 China Research Center for Computational Experiments and Parallel Systems Technology National University of Defense Technology Changsha410073 China Department of Computer and Information Science Science and Technology University of Macau China

ISBN: (纸本)9783902823625

Cyber Movement Organization (CMO) is a special kind of social movement organization on the Web. In this paper, we propose a model to simulate the mobilizing process of CMO, which consists of the individual unit, organization unit, and the mobilizing mechanisms. The mobilizing mechanisms has three sub-mechanisms: the participation mechanism, the choice mechanism, and the inviting mechanism. A dataset of more than two million "human flesh search" related microblogs is used to validate the model. Empirical results show that our model can capture the key features of the real-world mobilizing process. © IFAC.

关键词： Automation

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