Transactions of the Institute of Systems, Control and Information Engineers
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668

Transactions of the Institute of Systems, Control and Information Engineers Vol. 2 (1989), No. 3

  • A Modalistic Formalization of Fuzzy Mathematical Programming Problems

    pp. 69-79

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.2.69

    In this paper, the fuzzy mathematical programming problem is formalized based on the idea analogous with the chance constrained programming problem. The difference in meaning between the ambiguity of the coefficients and that of the decision maker's preference is emphasized. The fuzzy relations between possibility distributions proposed. by Inuiguchi et al. are introduced. The constraints with fuzzy coefficients are treated as the restrictions which should be satisfied properly rather than perfectly. Namely, the constraints are satisfied to at least a certain level given by the decision maker. The objective function with fuzzy coefficients is treated variously depending on the decision objectives, i. e. the optimization of the modalities, the optimization of the fractile and the minimization of the ambiguity. The determinstic equivalent constraints and the equivalent problems are shown when the constraints and the objective function are linear.
  • A Digital Learning Control Considering Input Saturation and Disturbances

    pp. 80-87

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.2.80

    This paper is concerned with a digital learing control method in which the present input is modified by the error information at the previous trial to produce a given desired output. First, it is clarified that the input saturation and disturbances cause serious problems concerning to the error convergency and achievable accuracy in the digital learning control system, especially when the sampling period becomes small. Second, a digital learning control method is proposed which overcomes the above problems. Finally, the validity of the proposed method is illustrated by simulation and experiments.
  • ARMA Modeling by the Circular Lattice Method

    pp. 88-96

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.2.88

    In this paper, applications of the circular lattice (CL) method for multichannel signal processing to ARMA modeling are presented. After a review of the CL method, the covariance characterization of an ARMA process is discussed by embedding an ARMA process into a degenerate two-channel AR process. The connections with the method of Mullis-Roberts and the theory of Markov-cover by Anderson and Skelton are pointed out.
    Then, a new ARMA lattice filter is proposed and the effect of coefficient quantization on the frequency response of our lattice filter is compared with those of other ARMA lattice filters. Finally, an ARMA parameter estimation problem based on the impulse response data is treated by using the Burg type CL algorithm. Some numerical results are presented to show the effectiveness of the proposed method.
  • An Automatic Determination Method of Smoothing Bandwidth in Power Spectral Estimation

    pp. 97-107

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.5687/iscie.2.97

    A practical method of power spectral estimation of stationary random signals is proposed, that can automatically provide an associated optimal estimate of the signals, only from an observed time series datum. First, the conventional method of power spectral estimation by smoothing periodgram is reviewed and the mean squared error of the normalized estimate is made clear, from the viewpoints of its bias and variance. Secondly, based on the fundamental nature of the statistics in a mutually reverse relation with respect to the smoothing bandwidth, a systematic method not only of adaptively determining the bandwidth but also of obtaining the optimal spectral estimate is presented, by newly introducing the evaluation indices of the statistics only from an observed datum. Finally, both the fundamental character and the effectiveness of the proposed method are illustrated by the fundamental results of computer simulations and power spectral estimation of measured heart sounds and noises.

Article Access Ranking

10 Dec. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Effect of Interfacial Properties on Agglomeration of Inclusions in Molten Steels ISIJ International Vol.59(2019), No.10
  3. Corrosion Behavior of Alumina Containing Refractory in Blast Furnace Hearth by CaO–SiO2–MgO–Al2O3–Cr2O3 Slags ISIJ International Vol.59(2019), No.11
  4. Numerical Simulation on Influence of Coke Oven Gas Injection on Iron Ore Sintering ISIJ International Advance Publication
  5. State of the Art in the Control of Inclusions in Spring Steel for Automobile - a Review ISIJ International Advance Publication
  6. Analysis of the Coke Particle Size Distribution and Porosity of Deadman Based on Blast Furnace Hearth Dissection ISIJ International Vol.59(2019), No.11
  7. Nanostructured Bainitic Bearing Steel ISIJ International Advance Publication
  8. Mathematical Modelling Study of Dynamic Composition Change of Steel and Mold Flux in Continuous Casting of Steel ISIJ International Vol.59(2019), No.11
  9. Formation Mechanism of Coarse Austenite Grain during Hot Forging and Cooling in Case Hardening Steel Tetsu-to-Hagané Advance Publication
  10. Mechanism of Improved Ductility of 1,500 MPa-class Ultra-high Strength Cold-rolled Steel Sheet Produced by Rolling and Partitioning Method Tetsu-to-Hagané Advance Publication

Search Phrase Ranking

10 Dec. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. steel
  5. hot rolling
  6. pellet
  7. cohesive zone
  8. mold
  9. phosphatability
  10. argon bubbles