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IEEE International Symposium on Biomedical Imaging

作者： Hang Chang Paul T. Spellman Bahram Parvin Life Sciences Division Lawrence Berkeley National Laboratory Berkeley California U.S.A Department of Electrical and Computer Engineering University of California Riverside U.S.A Center for Spatial Systems Biomedicine Oregon Health Sciences University Portland Oregon U.S.A Biomedical Engineering Department University of Nevada Reno Nevada U.S.A

ISBN: (纸本)9781467393300

Classification of histology sections from large cohorts, in terms of distinct regions of microanatomy (e.g., tumor, stroma, normal), enables the quantification of tumor composition, and the construction of predictive models of the clinical outcome. To tackle the batch effects and biological heterogeneities that are persistent in large cohorts, sparse cellular morphometric context has recently been developed for invariant representation of the underlying properties in the data, which summarizes cellular morphometric features at various locations and scales, and leads to a system with superior performance for classification of microanatomy and histopathology. However, the sparse optimization protocol for the calculation of sparse cellular morphometric features is not scalable for large scale classification. To improve the scalability of systems, based on sparse morphometric context, we propose the predictive sparse morphometric context in place of the original implementation, which approximates the sparse cellular morphometric feature through a non-linear regressor that is jointly learned with an over-complete dictionary in an unsupervised manner. Experimental results indicates over 50 times speedup compared to our previous implementation with the help of non-linear regressor; while producing competitive performance.

关键词： Tumors Context Feature extraction Kernel Training Optimization Encoding

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Integrated robust control design for in-wheel-motor vehicles 35th

Integrated robust control design for in-wheel-motor vehicles

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35th FISITA World Automotive Congress, 2014

作者： Gáspár, Péter Bokor, József Szabó, Zoltán Fülep, Tímea Szauter, Ferenc András, Mihály Systems and Control Laboratory Institute for Computer Science and Control Budapest Hungary Systems and Control Laboratory MTA SZTAKI MTA-BME Control Engineering Research Group Budapest Hungary Research Center of Vehicle Industry Széchenyi István University Győr Hungary Department of Control for Transportation and Vehicle Systems Budapest University of Technology and Economics Budapest Hungary

The paper proposes a multi-layer supervisory architecture for integrated control systems in road vehicles. The role of the supervisor is to coordinate active control components and provide priority among them. The supervisor has information about the current operational mode of the vehicle and it is able to make decisions about the necessary interventions into the vehicle components and guarantee the reconfigurable operation of the vehicle. The decisions of the supervisor are propagated to the lower layers through predefined interfaces encoded as suitable scheduling signals. The contribution of the paper is the application of the LPV methodology in a design case study in which an integrated control of four wheel independently-actuated electric vehicle with active steering system is developed. © 2014, FISITA. All rights reserved.

关键词： Robust control

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A partial-state observer for a class of MIMO nonlinear systems 19

A partial-state observer for a class of MIMO nonlinear syste...

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

作者： Wang, Lei Isidori, Alberto Su, Hongye Xu, Weihua State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control ZheJiang University Hangzhou310027 China Department of Computer Control and Management Engineering University of Rome La Sapienza Rome Italy

ISBN: (纸本)9783902823625

In this paper, we consider input-affine invertible MIMO nonlinear systems which can be transformed into a special normal form by means of the structure algorithm. The normal form highlights a partial state, a subset of state variables, which plays in this setting a role similar to that of the outputs and its derivatives in a SISO system. It is shown that, if a system in this class can be asymptotically stabilized by means of a static feedback from that partial state, then semiglobal stabilization can be achieved via dynamic feedback driven by the output of the system. The dynamic feedback in question is based a (non-trivial) extension to MIMO systems of the standard high-gain observer. © IFAC.

关键词： Nonlinear systems

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Sample PREanalytical Code for labeling of biospecimens: an analysis of specimen labeling protocols

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Journal of Biorepository Science for Applied Medicine 2015年 3卷 15页

作者： Silvia Riondino Umberto Nanni Fay Betsou Luisa Rossetti Corrado Campisi Riccardo Fiorentino Raffaele Palmirotta Patrizia Ferroni Mario Roselli Fiorella Guadagni 1 BioBIM-Interinstitutional Multidisciplinary BioBank IRCCS San Raffaele Pisana – Research Center Rome Italy 2 Department of Computer Control and Management Engineering “Antonio Ruberti” “Sapienza” University Rome Italy 3 Integrated Biobank of Luxembourg Luxembourg City Luxembourg 4 LC Campisi Laboratory Ltd Avola (SR) Italy 5 Department of Systems Medicine University of Rome “Tor Vergata” Rome Italy

:The suitability of samples for a given research depends on many variables, among which, the best preanalytical conditions for the type of test that should be carried out. Thus, standardization and harmonization of processing conditions for samples entering a particular study should be highly pursued to facilitate research collaborations among different institutions and biological banks, allowing specimen comparison both for sample sharing and for the development of large-scale clinical trials. In this study, we review some issues and scenarios related to the adoption of the Sample PREanalytical Code, which deserve attention for a proper management of the samples and, ultimately, for maximizing the efficiency of the consistent investments required to set up biobanking resources.

关键词： biobanking preanalytical variables sample labeling

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Inverse scattering solutions using holographic data

Inverse scattering solutions using holographic data

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Digital Holography and Three-Dimensional Imaging, DH 2014

作者： Zhou, Renjie Kim, Taewoo Goddard, Lynford L. Popescu, Gabriel Quantitative Light Imaging Laboratory Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana IL 61801 United States Photonic Systems Laboratory Department of Electrical and Computer Engineering Micro and Nanotechnology Laboratory University of Illinois at Urbana-Champaign Urbana IL 61801 United States

We present a new method for solving inverse scattering problems in wavevector space for both coherent and incoherent illuminations. Using the solution and holographic data, we experimentally demonstrate 3D cell recons... 详细信息

ISBN: (纸本)9781557523082

关键词： Inverse problems

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Wide-field diffraction phase microscope for precision metrology

Wide-field diffraction phase microscope for precision metrol...

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Digital Holography and Three-Dimensional Imaging, DH 2014

作者： Rajshekhar, Gannavarpu Bhaduri, Basanta Edwards, Chris Zhou, Renjie Goddard, Lynford L. Popescu, Gabriel Quantitative Light Imaging Laboratory Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana-61801 IL United States Photonic Systems Laboratory Department of Electrical and Computer Engineering Micro and Nanotechnology Laboratory University of Illinois at Urbana-Champaign Urbana-61801 IL United States

We demonstrate a wide-field diffraction phase microscope for large field of view quantitative phase imaging. The instrument provides an extremely stable, single-shot, full-field and robust imaging modality for nanosca... 详细信息

ISBN: (纸本)9781557523082

关键词： Diffraction

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Online Optimal control for VTOL Aircraft System Based on DHP Algorithm 33

Online Optimal Control for VTOL Aircraft System Based on DHP...

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第三十三届中国控制会议

作者： TAN Fuxiao LIU Derong GUAN Xinping The School of Computer and Information Fuyang Teachers College The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences The School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

ISBN: (纸本)9781479947249

It is well known that vertical take-off and landing(VTOL) aircraft system is a complex multi-variable nonlinear system with large disturbances. In order to control the VTOL aircraft system ef ciently, it is necessary to explore new optimal control methods to stabilize the system states. In this paper, we apply dual heuristic programming(DHP) to design the optimal controller for VTOL aircraft system. As a framework of approximate dynamic programming(ADP) algorithm, DHP consists of three modules: model, critic and actor. The critic module output partial derivatives of cost function with respect to state. It has many advantages such as good dynamics, fast convergence rate, and high control resolution. Simulation and experimental results demonstrate the effectiveness of optimal controller for VTOL aircraft system based on the DHP algorithm.

关键词： VTOL aircraft,Dual heuristic programming,Adaptive critic designs,Optimal control

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Fast distributed power regulation method via networked thermostatically controlled loads 19

Fast distributed power regulation method via networked therm...

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

作者： Xing, Hao Mou, Yuting Lin, Zhiyun Fu, Minyue Department of Control Science and Engineering ZheJiang University China State Key Laboratory of Industrial Control Technology College of Electrical Engineering ZheJiang University 38 Zheda Road Hangzhou310027 China School of Electrical Engineering and Computer Science University of Newcastle NSW2308 Australia

ISBN: (纸本)9783902823625

This paper studies the problem of countering the fluctuations of renewable power supply in smart grid. A fully distributed algorithm to control a network of thermostatically controlled loads (TCLs) is proposed to match, in real time, the aggregated power consumption of the TCLs and the forecast power supply. The algorithm is developed by converting the control problem into a consensus problem of individual utility functions. We then show that the problem is equivalent to a convex optimization problem and an algorithm based on distributed bisection method is presented to solve the problem. The proposed algorithm converges fast and is fully distributed, requiring only local information for each TCL and limited communication with neighboring TCLs, yet the available power supply is fairly dispatched among different TCLs. A numerical example is given to illustrate the effectiveness of the algorithm when applied to a network of variable-frequency air-conditioners (VFACs). © IFAC.

关键词： Problem solving

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Modularized high frequency high power 3-level neutral point clamped PEBB cell for renewable energy system

Modularized high frequency high power 3-level neutral point ...

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作者： Lu, Sizhao Zhao, Zhengming Yuan, Liqiang Lu, Ting Jiao, Yang Mu, Mingkai Lee, Fred C. State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing China Center for Power Electronics Systems Bradley Department of Electrical and Computer Engineering Virginia Tech. BlacksburgVA24061 United States

ISBN: (纸本)9781479956982

This paper presents a modularized high frequency high power 3-level neutral point clamped power electronics building block (PEBB) for renewable energy system. Three-level diode neutral point clamped (NPC) and 3-level active NPC are most popular topologies used in industrial applications based on modularized building block. However, since the single 3-level diode NPC or active NPC cell is unable to form a 3-level DC-DC chopper, the applications of PEBB cells based on these two circuits are limited where a DC-DC chopper is needed. In this paper, loss analysis for the 3-level chopper built by two 3-level diode NPC cells or active NPC cells are conducted. Switching loops in PEBB cells are identified, and double pulse tests are conducted for turn on and turn off transient of the switching loops. Based on double pulse tests, the switching losses will be quantified for different switching loops. Two 3-level bi-directional chopper circuits based on the active NPC PEBB cells are presented and compared. Then the modified PEBB cell derived from single active NPC cell is proposed for 3-level bi-directional chopper. Based on a common active NPC PEBB cell, the power converter can be built with modularized structure to achieve high frequency, high efficiency and low cost. © 2014 IEEE.

关键词： Choppers (circuits)

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Piecewise Polynomial Policy Iterations for Synthesis of Optimal control Laws in Input-Saturated systems

Piecewise Polynomial Policy Iterations for Synthesis of Opti...

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American control Conference

作者： Simone Baldi Giorgio Valmorbida Antonis Papachristodoulou Elias B. Kosmatopoulos Delft Center for Systems and Control Delft University of Technology Delft 2628CD The Netherlands Department of Engineering Science Control Group University of Oxford Parks Road Oxford OX1 3PJ U.K. Dept. of Electrical and Computer Engineering Democritus University of Thrace Xanthi 67100 Greece and Informatics & Telematics Institute Center for Research and Technology Hellas (ITI-CERTH) Thessaloniki 57001 Greece

ISBN: (纸本)9781479917730

This work proposes a policy iteration procedure for the synthesis of optimal and globally stabilizing control policies for Linear Time Invariant (LTI) Asymptotically Null-controllable with Bounded Inputs (ANCBI) systems. This class includes systems with eigenvalues on the imaginary axis (possibly repeated) but no pole with positive real part. The proposed policy iteration relies on a class of piecewise quadratic Lyapunov functions which is non-differentiable, but continuous, and polynomial in both the state and the deadzone functions of the input signals. The second step of the policy iteration is based on a piecewise control policy improvement. An important aspect of the proposed piecewise policy is that at each step of the iteration the computed policy is globally stabilizing and the existence of an improving value function is guaranteed as well. The solution to the inequalities which is required to hold at each step of the policy iteration, is obtained by solving Sum-of-Squares Programs (SOSP) that can be efficiently implemented with semidefinite programming (SDP) solvers.

关键词： iterative methods Policies Piecewise control law synthesis Polynomial control strategy Liapunov function Bounded

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