The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform

Kazuo Yoshida - One of the best experts on this subject based on the ideXlab platform.

  • Nonstationary Robust Control of Flexible Structures using Frequency-Shaped Time-Varying Criterion Function
    IFAC Proceedings Volumes, 1996
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    Abstract In this method, for a robust control to reduce influences of the unstructured uncertainties, low-pass property is given to the controller by using a frequency-shaped type of Criterion Function. Moreover, an integrated design of both the H 2 control and the H ∞ control is established by applying simultaneously the time-varying property to the Criterion Function. As an example, a positioning control problem of flexible inverted pendulum is considered. The usefulness of the method is verified by theoretical calculations and experiments.

  • Simultaneous optimization of positioning and vibration control using a time-varying frequency-shaped Criterion Function
    Control Engineering Practice, 1996
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    Abstract This paper presents a simultaneous synthesis method of both motion and vibration controls using a time-varying frequency-shaped Criterion Function for the positioning problem of flexible structures. In order to improve the efficiency and the robustness of such controls, in this method, the characteristic difference in frequency range between positioning and vibration control is taken into consideration, and different frequency-shaped weightings are performed individually for the positioning and the vibration reduction. This method is applied to a positioning control problem with a vibration system. The usefulness of the method is verified by numerical calculations.

  • Simultaneous Optimization of Positioning and Vibration Control Using Time-Varying Criterion Function.
    Transactions of the Japan Society of Mechanical Engineers Series C, 1994
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    For positioning control of flexible structures, it is important to reduce residual vibration after the positioning is completed. If a positioning controller and a vibration controller are designed independently and abrupt switching is performed from the former to the latter, the moving structure suffers from impact and additional vibration is caused. This paper presents a method of simultaneous synthesis both motion and vibration controllers, using a time-varying Criterion Function for optimal control. This method is applied to positioning control of a flexible structure. The usefulness of this method is verified theoretically and experimentally.

Susumu Hara - One of the best experts on this subject based on the ideXlab platform.

  • unified design of time varying gain type access control and integral type servo control by means of nonstationary optimal control method
    Transactions of the Japan Society of Mechanical Engineers. C, 2003
    Co-Authors: Susumu Hara
    Abstract:

    Servo control is one of the most important control techniques for motion control of mechanical structures. In order to suppress the stationary error between a reference trajectory and a servo system response, servo controllers often include the integral characteristic. For example, LQI (Linear Quadratic Integral) optimal control is one of the standard selections for designing servo control systems. Nonstationary optimal regulator (NOR) is another motion control method which produces superior vibrationless trajectories for the positioning control problems of vibration systems. This study discusses a unified design method of the time-varying gain type access control similar to NOR and the integral type servo control similar to LQI control by means of a frequency-shaped time-varying Criterion Function. This method realizes two high performance control modes and the smooth switching of the modes by the optimization of the single Criterion Function. The effectiveness of this method is verified by numerical calculations and experiments.

  • Nonstationary Robust Control of Flexible Structures using Frequency-Shaped Time-Varying Criterion Function
    IFAC Proceedings Volumes, 1996
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    Abstract In this method, for a robust control to reduce influences of the unstructured uncertainties, low-pass property is given to the controller by using a frequency-shaped type of Criterion Function. Moreover, an integrated design of both the H 2 control and the H ∞ control is established by applying simultaneously the time-varying property to the Criterion Function. As an example, a positioning control problem of flexible inverted pendulum is considered. The usefulness of the method is verified by theoretical calculations and experiments.

  • Simultaneous optimization of positioning and vibration control using a time-varying frequency-shaped Criterion Function
    Control Engineering Practice, 1996
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    Abstract This paper presents a simultaneous synthesis method of both motion and vibration controls using a time-varying frequency-shaped Criterion Function for the positioning problem of flexible structures. In order to improve the efficiency and the robustness of such controls, in this method, the characteristic difference in frequency range between positioning and vibration control is taken into consideration, and different frequency-shaped weightings are performed individually for the positioning and the vibration reduction. This method is applied to a positioning control problem with a vibration system. The usefulness of the method is verified by numerical calculations.

  • Simultaneous Optimization of Positioning and Vibration Control Using Time-Varying Criterion Function.
    Transactions of the Japan Society of Mechanical Engineers Series C, 1994
    Co-Authors: Susumu Hara, Kazuo Yoshida
    Abstract:

    For positioning control of flexible structures, it is important to reduce residual vibration after the positioning is completed. If a positioning controller and a vibration controller are designed independently and abrupt switching is performed from the former to the latter, the moving structure suffers from impact and additional vibration is caused. This paper presents a method of simultaneous synthesis both motion and vibration controllers, using a time-varying Criterion Function for optimal control. This method is applied to positioning control of a flexible structure. The usefulness of this method is verified theoretically and experimentally.

J.a. Jimenez-pajares - One of the best experts on this subject based on the ideXlab platform.

  • ICNN - A comparison of Criterion Functions for a neural network applied to binary detection
    Proceedings of ICNN'95 - International Conference on Neural Networks, 1
    Co-Authors: Diego Andina, J.l. Sanz-gonzalez, J.a. Jimenez-pajares
    Abstract:

    In this paper, the performance of a neural binary detector for five different Criterion Functions is analyzed, showing that a typical backpropagation algorithm that uses least-mean-squares (LMS) Criterion Function, despite of its widely use, is far from achieving the best solution for this problem. By evaluating the detection performance of each network, for the same structure, it is shown how the change of the Criterion Function improves significantly the solution achieved by the typical LMS error Criterion.

Peter Fonagy - One of the best experts on this subject based on the ideXlab platform.

  • DSM Borderline Criterion Function Across Age-Groups: A Cross-Sectional Mixed-Method Study.
    Assessment, 2018
    Co-Authors: Carla Sharp, Lynne Steinberg, Jared D. Michonski, Allison Kalpakci, Christopher Fowler, B. Christopher Frueh, Peter Fonagy
    Abstract:

    DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition) Section II criteria for borderline personality disorder (BPD) lack developmental operationalization. The aim of the current study was to evaluate whether DSM criteria operate similarly across adolescents and adults to determine if developmental adjustment for DSM criteria was needed. Three age cohorts were recruited: adolescents (ages 12-17 years; n = 484), young adults (ages 18-25 years; n = 442), and adults (ages ≥26 years; n = 953). The Child Interview for DSM-IV BPD and the Structured Clinical Interview for DSM-IV Axis II disorders were administered to adolescents and adults, respectively. Item response theory methods were used to evaluate differential item (or Criterion) Functioning (DIF) of BPD criteria across adolescents and adults. Qualitative analyses were then used to evaluate the potential sources of DIF. Item response theory results demonstrated DIF across adolescents and adults for all DSM BPD criteria. Qualitative analyses suggested that the source of DIF was most likely due to rater/interviewer bias. Results furthermore suggested that behavioral criteria may represent the heterotypic features of BPD, while intra- and interpersonal criteria represent the homotypic features of the disorder. The article concludes with recommendations for developmentally informed guidelines for the assessment of BPD.

Zheng Ying - One of the best experts on this subject based on the ideXlab platform.

  • multi threshold image segmentation based on combining fisher Criterion and potential Function
    Journal of Computer Applications, 2012
    Co-Authors: Zheng Ying
    Abstract:

    The traditional multi-threshold image segmentation method has high complexity and the results are poor.In order to solve the problems,a new multi-thresholding method based on combining Fisher Criterion and potential Function was proposed.First,the Fisher Criterion Function was simplified and a recursive algorithm was used to reduce the computational complexity.Then the number of segmentation class was obtained by utilizing the histogram potential Function method.Finally,the simplified Fisher Criterion Function was used for multi-thresholding and the segmentation results were further processed.The experimental results show that compared with the traditional multi-thresholding methods,the proposed method has better segmentation performance and that its running time is less.It can be used in the real-time applications.