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

作者： Pérez-Castro, A. Sánchez, J. Guzmán, J.L. Dep. of Computer Science and Automatic Control National Distance Education University Madrid Spain Dep. of Computer Science University of Almería Almería Spain

ISBN: (纸本)9783902823625

This work presents a strategy to estimate and to correct dynamics variations in nonlinear time variant systems. This correction is carried out by estimating the internal parameters of the process and determining the differences with an available nonlinear model of the system. The proposed approach has a double functionality;on the one hand, it allows a better performance of using nonlinear models for control purposes, like for nonlinear predictive controllers;and on the other hand, it can be used as a diagnosis mechanism since it provides relevant information about the current state of the system. Thus, in order to use this technique with nonlinear time variant systems, a nonlinear model predictive control strategy has been used. The estimator proposed within the framework of this work is similar to the Moving Horizon Estimation strategy. Experimental results on a real tank process are presented to show the main properties of the proposed architecture. © IFAC. © Copyright IFAC 2014.

关键词： Model predictive control

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MINIMUM TIME FLIGHT POLICY OF GUIDED MISSILE.

MINIMUM TIME FLIGHT POLICY OF GUIDED MISSILE.

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Proceedings of the 1984 American control Conference.

作者： Abd El-Salam, Ibrahim Abd El-Rahim, Mohamed M.A. Univ of Alexandria Dep of Computer Science and Automatic Control Alexandria Egypt Univ of Alexandria Dep of Computer Science and Automatic Control Alexandria Egypt

Due to the importance of the flight time elapsed of a guided missile before impact, the minimum time flight policy is investigated. Using the maximum principle, the results of bang-bang control policy are given but with highly complicated costate equations. Some remarks are made about the behaviour of the optimal control policy. Three different numerical algorithms are described and applied to obtain a bang-bang control policy using real data for the missile. The first and second algorithms are based on the remarks obtained from the analytical results. The gradient technique is also used in obtaining the third algorithm. The effects of both the amplitude of the control and the allowable number of switches in the control on the miss distance are obtained. The relation between the target velocity and the final time is also investigated.

关键词： ROCKETS AND MISSILES

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FLIGHT POLICY OF GUIDED MISSILE WITH MINIMUM NORMAL ACCELERATION.

FLIGHT POLICY OF GUIDED MISSILE WITH MINIMUM NORMAL ACCELERA...

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Proceedings of the 1984 American control Conference.

作者： Abd-el-Salam, Ibrahim El Asran, Abd-el-all Univ of Alexandria Dep of Computer Science & Automatic Control Alexandria Egypt Univ of Alexandria Dep of Computer Science & Automatic Control Alexandria Egypt

The problem of guided missile flight with minimum normal acceleration is investigated. Obtaining an analytical result for the problem in its general form is difficult. A constant normal acceleration policy is obtained which requires keeping the normal acceleration constant all the flight time and satisfying all the constraints. A computer program is prepared and executed using real data to form some charts for different velocities and different missile initial conditions. Comparing the results using the above optimum policy, and the results solving the problem by the gradient technique shows that it gives a less normal acceleration.

关键词： ROCKETS AND MISSILES

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Reaching a consensus on access detection by a decision system 2

Reaching a consensus on access detection by a decision syste...

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2014 2nd IEEE International Conference on Progress in Informatics and Computing, PIC 2014

作者： Guevara, Cesar Santos, Matilde Martin, Jose Antonio Lopez, Victoria Dep. Computer Architecture and Automatic Control Complutense University of Madrid Madrid Spain

ISBN: (纸本)9781479920334

Classification techniques based on Artificial Intelligence are computational tools that have been applied to detection of intrusions (IDS) with encouraging results. They are able to solve problems related to information security in an efficient way. The intrusion detection implies the use of huge amount of information. For this reason heuristic methodologies have been proposed. In this paper, decision trees, Naive Bayes, and supervised classifying systems UCS, are combined to improve the performance of a classifier. In order to validate the system, a scenario based on real data of the NSL-KDD99 dataset is used. © 2014 IEEE.

关键词： Decision trees

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Wavelet transform based technique for text image localization

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Karbala International Journal of Modern science 2016年第2期2卷 138-144页

作者： Ali, Suhad A. Hashim, Ashwaq T. Babylon University Science College for Women Computer Science Dep. Babylon Iraq Technology University Control and Systems Engineering Dep. Baghdad Iraq

In this paper, a robust technique based on discrete wavelet transform, edge detection, and morphology operation for scene text detection is proposed. There are several stages in the proposed method. In the first stage, a single wavelet decomposition LH, HL and HH subbands are applied for detecting edges in original scene text image. The projection technique is applied in the second stage to preliminary detect text and non-text pixels. In third stage, 4-connected components are applied, and then area geometric feature is used as threshold to remove non-text region. At last stage, morphological operations are applied to connect isolated text components and to remove non-text regions. The proposed method is applied on a various images such as images of low contrast, complex background images and images of different fonts and size of text. The experimental results show that the proposed method can detect regions of the text perfectly. © 2016 The Authors

关键词： Connected components DWT Image projection Morphological operator

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Segmentation of nuclei in cancer tissue images: Contrasting active contours with morphology-based approach

Segmentation of nuclei in cancer tissue images: Contrasting ...

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8th IEEE International Conference on BioInformatics and BioEngineering, BIBE 2008

作者： Cataldo, Santa Di Ficarra, Elisa Acquaviva, Andrea Macii, Enrico Dep. of Control and Computer Engineering of Politecnico di Torino Italy Dep. of Computer Science Universita di Verona Italy

ISBN: (纸本)9781424428458

In this paper we present a fully automated morphology-based technique for segmentation of nuclei in cancer tissue images and we compare it with a common technique for biomedical image processing, namely active contours. We discuss the limitations of active contours in the processing of immunohistochemical images characterized by heterogeneously stained nuclear region and noise caused by the presence of multiple tissue layers in the sample. We describe the integration of the proposed approach in a fully automated protein activity quantification tool. Finally, we demonstrate and motivate through extensive experiments that our fully automated morphology-based approach provides better accuracy compared to various active contours implementations.

关键词： Morphology

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Adaptive control of nonlinear systems via disturbance attenuation 4

Adaptive control of nonlinear systems via disturbance attenu...

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4th European control Conference, ECC 1997

作者： Qin, Bin Yang, Y.M. Dep. of Automation Shanghai Jiaotong Univ. Shanghai200030 China Dep. of Automatic Control and System Science Heilongjiang Univ. Harbin150080 China

ISBN: (纸本)9783952426906

An approach to the solution of the adaptive control for nonlinear systems with unknown parameters is presented by using the theory of nonlinear H∞ disturbance attenuation control. The two-level control law is presented. It is shown that the adaptive control law is related to the existence of the solution of a new form of Hamilton-Jacobi-Isaacs inequlity. The stability of the closed loop system can be guranteed when the update rate of the unknown parameter is equal to the requested update law. The asymptotical stability of the closed loop system can be guranteed when the estimators of the uncertain parameters convergence to the true value.

关键词： Nonlinear systems

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Model correction mechanishm for nonlinear time variant systems as support to predictive control strategies

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IFAC Proceedings Volumes 2014年第3期47卷 5975-5980页

作者： A. Pérez-Castro J. Sanchez J.L. Guzman Dep. of Computer Science and Automatic Control National Distance Education University Madrid Spain Dep. of Computer Science University of Almería Almería Spain

This work presents a strategy to estimate and to correct dynamics variations in nonlinear time variant systems. This correction is carried out by estimating the internal parameters of the process and determining the differences with an available nonlinear model of the system. The proposed approach has a double functionality; on the one hand, it allows a better performance of using nonlinear models for control purposes, like for nonlinear predictive controllers; and on the other hand, it can be used as a diagnosis mechanism since it provides relevant information about the current state of the system. Thus, in order to use this technique with nonlinear time variant systems, a nonlinear model predictive control strategy has been used. The estimator proposed within the framework of this work is similar to the Moving Horizon Estimation strategy. Experimental results on a real tank process are presented to show the main properties of the proposed architecture.

关键词： Modeling Model Predictive control Nonlinear Model Predictive control System diagnosis Nonlinear time variant models Moving Horizon Estimation

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An Analysis of Haskell Parallel Programming Model in the HaLVM 4

An Analysis of Haskell Parallel Programming Model in the HaL...

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4th International Conference on Computing and Applied Informatics 2019, ICCAI 2019

作者： Cheon, Junseok Kim, Yeoneo Hur, Taekwang Byun, Sugwoo Woo, Gyun Dep. of Electrical and Computer Engineering Pusan National University Korea Republic of Dep. of Computer Science Kyungsung University Korea Republic of Smart Control Center of LG Electronics Korea Republic of

Recently, cloud computers are widely used due to the development of computing environment and network speed. Unikernel is considered to be an attractive operating system in the manycore environment that effectively provides cloud computers. HalVM is a unikernel coded in Haskell. In this paper, we analyze the performance of Haskell running in a unikernel, which has shown good parallel programming performance in a manycore environment. In this paper, we analyze the performance of Haskell running in a unikernel, while Haskell has shown good performance in a manycore environment. To do this, we select HaLVM as the target operating system and analyze the performance by testing various Haskell parallel programming models. Test result shows that HaLVM is scalable only on IVC. We also implement a library to make programming with IVC more convenient, and use this library to compare extensibility experiments. Our test shows HaLVM's scalability is 112.42% higher than Linux environment. © Published under licence by IOP Publishing Ltd.

关键词： computer operating systems

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SSAM: A Haskell Parallel Programming STM Based Simple Actor Model 4

SSAM: A Haskell Parallel Programming STM Based Simple Actor ...

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4th International Conference on Computing and Applied Informatics 2019, ICCAI 2019

作者： Kim, Y. Cheon, J. Hur, T. Byun, S. Woo, G. Dep. of Electrical and Computer Engineering Pusan National University Korea Republic of Dep. of Computer Science Kyungsung University Korea Republic of Smart Control Center of LG Electronics Korea Republic of

As computers with manycore architecture are being widely spread, parallel programming becomes a pending issue. While parallel programming has been a challenging issue, Haskell is known to be of the best available one. The immutability and declarative nature of Haskell suit well the need for parallelism. In our previous work, we implemented the SAM, a parallel programming model based on Haskell. In this paper, we propose the SSAM, an updated version of SAM, by solving the performance overhead of SAM socket. We discuss the architecture of SSAM and its major functions and show the 14% scalability upgrade in a performance test. © Published under licence by IOP Publishing Ltd.

关键词： Parallel programming

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