检索结果-内蒙古大学图书馆

International Symposium on Computational Intelligence and Informatics

作者： M. Furkan Dodurka Engin Yesil Leon Urbas Getron Corporation New Jersey NJ USA Chair for Process Control Systems Engineering Technische Universität Dresden Germany

ISBN: (纸本)9781509039104

In this study, Fuzzy Cognitive Maps (FCMs), which are powerful tools for graphical representation of knowledge, are analyzed from an ambiguity and fuzziness perspective. In conventional FCMs the causal strengths are represented with singleton (crisp) fuzzy numbers, but recently, other researchers proposed different FCM structures where uniform (interval) or triangular fuzzy numbers are used in causal strength representation. Here, FCMs are analyzed by means of fuzziness and ambiguity measures that are proposed in literature to investigate the capability of models to represent uncertainties. In addition, two new measures, called the average ambiguity measure (AAM) and the average fuzziness measure (AFM), are proposed to indicate uncertainty representation of an FCM. A well-known FCM model of a public health system is used as a case study to show how the fuzzy weights determine the uncertainty representation of FCMs, and then the outcomes are discussed.

关键词： Uncertainty Measurement uncertainty Fuzzy cognitive maps Fuzzy sets Fuzzy systems Inference mechanisms

来源：评论

学校读者我要写书评

暂无评论

Robust output feedback NMPC with guaranteed constraint satisfaction

引用

IFAC-PapersOnLine 2015年第14期48卷 326-331页

作者： Sankaranarayanan Subramanian Sergio Lucia Radoslav Paulen Sebastian Engell Process Dynamics and Operations Group TU Dortmund Otto-von-Guericke-University Magdeburg Laboratory for Systems Theory and Automatic Control Institute of Automation Engineering Germany

Nonlinear Model Predictive control (NMPC) employs a plant model to compute a sequence of optimal control inputs for a finite horizon. As, in reality, there always exists a plant-model mismatch and not all states of the plant can be measured, the NMPC scheme must be robust to plant uncertainties and to estimation errors. Different robust NMPC strategies have been proposed to deal with these uncertainties. Among them, a multi-stage NMPC, which is based upon a scenario tree of future plant evolutions, is less conservative compared to worst-case open-loop approaches because the presence of feedback at future sampling instants is explicitly considered. In multi-stage output feedback NMPC, additional scenarios are created by sampling the innovations that are used to estimate the future states of the plant along the scenario tree. In this paper, we refine our previously published approach to include state estimation errors. Moreover we extend the scheme to guarantee robust constraint satisfaction by calculating reachable sets using Taylor models. The method is demonstrated for a nonlinear chemical process example.

关键词： Predictive control Robust control Output feedback Nonlinear control systems

来源：评论

学校读者我要写书评

暂无评论

RFID as Universal Entry Point to Linked Data Clouds

RFID as Universal Entry Point to Linked Data Clouds

引用

IEEE International Conference on RFID-Technology and Applications

作者： Jens Ziegler Markus Graube Leon Urbas Dresden University of Technology Dresden Germany Head of the Chair for Process Control Systems Engineering Dresden University of Technology Dresden Germany

ISBN: (纸本)9781467346566

Semantic web technologies are a key enabler for future information systems. The concept of Linked Data allows flexible inter-organizational collaboration and dynamic data integration. It surpasses the limitations of prevalent relational databases and proprietary access technologies. RFID, on the other hand, has been successfully applied to integrate physical artifacts into complex information systems. It allows the identification of artifacts by a unique identifier leveraging concepts such as the Internet of Things. Using the existing RFID ecosystem as universal entry point to Linked Data clouds makes it possible to connect the semantic description of the real world with the physical artifacts within this world. This provides new ways of merging and exploring real and virtual content. This paper presents an approach for using RFID as universal entry point to Linked Data clouds for task-driven and context-aware mobile support systems.

关键词： RFID Entry Point

来源：评论

学校读者我要写书评

暂无评论

Global Optimization for Integrated Design and control of Computationally Expensive process Models

Global Optimization for Integrated Design and Control of Com...

引用

IEEE Conference on Decision and control

作者： J.A. Egea D. Vries A.A. Alonso J.R. Banga Process Engineering Group Instituto de Investigaciones Marinas (CSIC) Vigo Spain Systems and Control Group Wageningen University Wageningen Netherlands

The problem of integrated design and control optimization of process plants is discussed in this paper. We consider it as a nonlinear programming problem subject to differential-algebraic constraints. This class of problems is frequently (i) non-convex and (ii) "costly" (i.e. computationally expensive to evaluate). Thus, on the one hand, local optimization techniques usually fail to locate the global solution and, on the second hand, most global optimization methods require many simulations of the model, resulting in unaffordable computation times. As an alternative, one may consider global optimization methods which employ surrogate-based approaches to reduce computation times, and which require no knowledge of the problem structure. A challenging Wastewater Treatment Plant benchmark model (see [1] and references therein) is used to evaluate the performance of these techniques. Numerical experiments with different optimization solvers indicate that the proposed benchmark optimization problem is indeed non-convex, and that we can achieve an improvement of the controller performance compared to the best tuned controller settings available in the literature. Moreover, these results show that surrogate-based methods may indeed reduce computation times while, at the same time ensuring convergence to the best known solutions.

关键词： Design optimization Computational modeling Optimization methods process control Wastewater treatment Stochastic processes Chemical processes control systems systems engineering and theory Performance evaluation

来源：评论

学校读者我要写书评

暂无评论

Analysis of different crystalliser configurations to perform preferential crystallisation

Analysis of different crystalliser configurations to perform...

引用

作者： Elsner, M.P. Muslera, E. Alonso Angelov, I. Fernaśndez Menéndez, D. Lorenz, H. Polenske, D. Vollmer, U. Raisch, J. Seidel-Morgenstern, A. Max Planck Institute for Dynamics of Complex Technical Systems Physical and Chemical Foundations of Process Engineering Sandtorstr. 1 39106 Magdeburg Germany Max Planck Institute for Dynamics of Complex Technical Systems Systems and Control Theory Group Sandtorstr. 1 39106 Magdeburg Germany Otto von Guericke University Department of Chemical Engineering Universitätsplatz 2 39106 Magdeburg Germany Otto von Guericke University Department of System Theory of Process Engineering PO Box 4120 39106 Magdeburg Germany

The intention of this paper is the analysis of general concepts for preferential crystallisation with the focus on aspects of quantification. In this preliminary examination, the amino acid threonine was used as a model system. The use of on-line polarimetry in combination with on-line densimetry as well as microscopic investigation enables to obtain some indispensable information about the crystallisation kinetics. Taking these estimated values into consideration a simplified mathematical description as a first approach including a population balance model was established for the simulation of the time changes of liquid phase composition during the preferential crystallisation process. Based on this simplified model different crystalliser configurations were investtigated.

关键词： Crystallization

来源：评论

学校读者我要写书评

暂无评论

Forecasting time series with a logarithmic model for the Polynomial Artificial Neural Networks

Forecasting time series with a logarithmic model for the Pol...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： J. C. Luna-Sanchez E. Gomez-Ramirez K. Najim E. Ikonen Intelligent Systems Group Faculty of Engineering La Salle University Mexico D.F. Mexico Process Control Laboratory ENSIACET Toulouse France Department of Process and Environmental engineering Systems Engineering Laboratory University of Oulu Oulu Finland

The adaptation made for the Polynomial Artificial Neural Networks (PANN) using not only integer exponentials but also fractional exponentials, have shown evidence of its better performance, especially, when it works with non-linear and chaotic time series. In this paper we show the comparison of the PANN improved model of fractional exponentials with a new logarithmic model. We show that this new model have even better performance than the last PANN improved model.

关键词： Mathematical model Modeling Polynomials Genetic algorithms Time series analysis Training Artificial neural networks

来源：评论

学校读者我要写书评

暂无评论

Metaproteomics in the One Health framework for unraveling microbial effectors in microbiomes

引用

Microbiome 2025年第1期13卷 1-21页

作者： Heyer, Robert Wolf, Maximilian Benndorf, Dirk Uzzau, Sergio Seifert, Jana Grenga, Lucia Pabst, Martin Schmitt, Heike Mesuere, Bart Van Den Bossche, Tim Haange, Sven-Bastiaan Jehmlich, Nico Di Luca, Mariagrazia Ferrer, Manuel Serrano-Villar, Sergio Armengaud, Jean Bode, Helge B. Hellwig, Patrick Masselot, Catherine Robbe Léonard, Renaud Wilmes, Paul Multidimensional Omics Analyses Group Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V. Dortmund Germany Multidimensional Omics Analyses Group Faculty of Technology Bielefeld University Bielefeld Germany Bioprocess Engineering Otto-Von-Guericke University Magdeburg Magdeburg Germany Bioprocess Engineering Max Planck Institute for Dynamics of Complex Technical Systems Magdeburg Magdeburg Germany Applied Biosciences and Process Engineering Anhalt University of Applied Sciences Köthen Germany Department of Biomedical Sciences University of Sassari Sassari Italy Institute of Animal Science University of Hohenheim Stuttgart Germany HoLMiR - Hohenheim Center for Livestock Microbiome Research University of Hohenheim Stuttgart Germany Département Médicaments Et Technologies Pour La Santé (DMTS) Université Paris-Saclay CEA INRAE SPI Bagnols-Sur-Cèze France Department of Biotechnology Delft University of Technology Delft The Netherlands Institute for Infectious Disease Control National Institute for Public Health and the Environment (RIVM) Bilthoven The Netherlands Department of Applied Mathematics Computer Science and Statistics Ghent University Ghent Belgium VIB - UGent Center for Medical Biotechnology VIB Ghent Belgium Department of Biomolecular Medicine Faculty of Medicine and Health Sciences Ghent University Ghent Belgium Department of Molecular Toxicology Helmholtz-Centre for Environmental Research - UFZ GmbH Leipzig Germany Department of Biology University of Pisa Pisa Italy Instituto de Catalisis y Petroleoquimica (ICP) CSIC Madrid Spain Department of Infectious Diseases Hospital Universitario Ramon y Cajal Instituto de Investigación Sanitaria Ramón y Cajal (IRYCIS) CIBER de Enfermedades Infecciosas Madrid Spain Department of Natural Products in Organismic Interactions Max-Planck-Institut for Terrestrial Microbiology Marburg Germany Center for Synthetic Microbiology (SYNMIKRO) Phillips University Marburg Marburg Germany Department of Ch

One Health seeks to integrate and balance the health of humans, animals, and environmental systems, which are intricately linked through microbiomes. These microbial communities exchange microbes and genes, influencing not only human and animal health but also key environmental, agricultural, and biotechnological processes. Preventing the emergence of pathogens as well as monitoring and controlling the composition of microbiomes through microbial effectors including virulence factors, toxins, antibiotics, non-ribosomal peptides, and viruses holds transformative potential. However, the mechanisms by which these microbial effectors shape microbiomes and their broader functional consequences for host and ecosystem health remain poorly understood. Metaproteomics offers a novel methodological framework as it provides insights into microbial dynamics by quantifying microbial biomass composition, metabolic functions, and detecting effectors like viruses, antimicrobial resistance proteins, and non-ribosomal peptides. Here, we highlight the potential of metaproteomics in elucidating microbial effectors and their impact on microbiomes and discuss their potential for modulating microbiomes to foster desired functions. Word Cloud showing the abundance of keywords in combination with the “Microbiome” in PubMed NCBI. As abundance values, the rounded logarithm with the base of 2 hits were used and submitted to https://***/create . For microbiome, the number without any combination was used for calculation. The word cloud displays different aspects of microbiome research: (i.) sources of microbiomes (green), (ii.) interactions (purple), (iii.) involved taxa (red), (iv.) applied experimental approaches (blue), and (vi.) societal effects and recent or future applications (gray).

关键词： Metaproteomics Microbial community Bacteriophages Microbiome Microbial effectors

来源：评论

学校读者我要写书评

暂无评论

Experimental modeling of vertical dynamics of vehicles with controlled suspensions

Experimental modeling of vertical dynamics of vehicles with ...

引用

2004 SAE World Congress

作者： Milanese, Mario Novara, Carlo Gabrielli, Paolo Tenneriello, Luigi Dipartimento de Automatica e Informatica Politecnico di Torino Italy FIAT Auto S.p.A. - Product and Process Engineering Vehicle Dynamics Active Chassis Control Italy Elasis S.C.p.A. - Fiat Group Control Systems Dept. Modeling Simulation and Control Strategies Vehicle Dynamics Italy

ISBN: (纸本)0768013194

In the paper, identification of vertical dynamics of vehicles with controlled suspensions is considered. Identification is performed from experimental data measured on a four-poster bench test of a segment C car, equipped with a CDC-Skyhook dampers control system. Vertical displacements at tires are imposed, related to different types of road profiles at different constant speeds and the following front and rear variables have been measured: chassis accelerations, wheels accelerations, chassis-wheel displacements, chassis-road displacements and control currents of the dampers. A nonlinear model in regression form is identified, having the road profile and damper control currents as inputs and chassis and wheels accelerations as outputs. The model is identified by means of a Set Membership structured identification method, which takes advantage of physical information on the structure of the system, decomposing the system in five subsystems: one represents the chassis and engine and the other ones represent the front and rear suspensions and wheels-tires. The overall high-dimensional identification problem is reduced to the identification of lower dimensional subsystems and to the estimation of their interactions and a recently proposed iterative scheme is used for its solution. A quite satisfactory overall model has been obtained, whose accuracy is documented by simulating the system with road profiles and damper control currents not used for the identification. Copyright © 2004 SAE International.

关键词： Chassis

来源：评论

学校读者我要写书评

暂无评论

control Lyapunov function based feedback design for quasi-polynomial systems

引用

IFAC Proceedings Volumes 2013年第23期46卷 128-133页

作者： Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

The aim of this work is to present an entropy-like Lyapunov function based dynamic feedback design technique for quasi-polynomial and Lotka-Volterra systems. It is shown, that the dynamic feedback design problem is equivalent to the feasibility of a bilinear matrix inequality. The problem is also formulated as a control Lyapunov function based feedback design when the Lyapunov function parameters are given, the solution of this problem can be obtained by solving a linear matrix inequality. The developed method is illustrated on a simple numerical example.

关键词： Lyapunov stability nonlinear systems stabilizing feedback dynamic feedback optimization problems

来源：评论

学校读者我要写书评

暂无评论

Maximum-likelihood extremum seeking control of microalgae cultures

引用

IFAC-PapersOnLine 2021年第3期54卷 336-341页

作者： Laurent Dewasme Alain Vande Wouwer Christian Gabin Feudjio Letchindjio Afaq Ahmad Sebastian Engell Systems Estimation Control and Optimization (SECO) University of Mons (UMONS) Belgium Process Dynamics and Operations Group Department of Biochemical and Chemical Engineering TU Dortmund University Germany

This paper proposes a model-free extremum seeking control (ESC) approach to optimize the productivity of continuous cultures of microalgae, considering the dilution rate and the light intensity as manipulated variables, and the biomass concentration as single measurement. The resulting two-input single-output optimization problem is first solved using a recursive least-squares strategy based on the representation of the process by a Hammerstein block-oriented model. In order to face the presence of noise on the regressor variables (input and output signals), the problem is then reformulated as a maximum-likelihood estimation problem, which is solved on a moving horizon. Simulation results demonstrate the method performance.

关键词： real-time optimization optimal control parameter estimation least-squares biotechnology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：