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. 21 (2008), No. 2

  • Evolutionary Dynamics of Genetic Algorithms on Fitness Landscapes with Neutral Networks

    pp. 31-39

    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.21.31

    Neutral networks, which occur in fitness landscapes containing neighboring points of equal fitness, have attracted much research interest in recent years. In our recent papers, we have shown that, in the case of simple test functions, the mutation rate of a genetic algorithm is an important factor for improving the speed at which a population moves along a neutral network. Our results also suggested that the benefits of the variable mutation rate strategy used by the operon-GA increase as the ruggedness of the landscapes increases. In this paper, we conducted a series of computer simulations with evolutionary robotics (ER) problems in order to investigate whether our previous results are applicable to this problem domain. The evolutionary dynamics we observed were consistent with those observed in our previous experiments, confirming that the variable mutation rate strategy is also beneficial to the ER problems.
  • Model Reduction using the Sine-Wave Response Gramian

    pp. 40-47

    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.21.40

    In this paper, we propose a model reduction method by truncation of the balanced realization associated with the sine-wave response observability gramian and the controllability gramian. A feature of the present model reduction method is that the transfer function's value of the reduced-order model is equal to that of the original model at some frequency points. This method is also shown to provide the reduced-order model which minimizes an error norm of the model reduction.
  • Pass Schedule Optimization for a Tandem Cold Mill Using Chance-constrained Programming Method

    pp. 48-59

    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.21.48

    Pass schedules for a tandem cold mill have been optimized using the chance constrained programming method. Variations of variables are evaluated from past data without assuming probability distributions. Discrete constraints are smoothed with the sigmoid functions, and the sequential quadratic programming method is applied. Furthermore, the constraints are relaxed individually on a priority basis so that a feasible and practical solution is obtained. Experimental results with high tensile strength steel strips showed 13 to 35% decreases in off-gage length.
  • Discrete-Time Control Systems Approach for Optimal Smoothing Splines

    pp. 60-68

    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.21.60

    We consider the problem of designing optimal smoothing spline curves by employing an approach based on linear control systems. First, the problem is formulated using continuous-time, time-invariant systems with piecewise constant inputs. Then by introducing discrete time-varying systems, the solutions for optimal splines including periodic splines are derived. The existence conditions for unique optimal solutions are established and linked to the concepts of controllability and observability. The computational procedures for the optimal splines are straightforward. The design method for periodic splines is applied to a shape synthesizing problem using jellyfish as the example.

Article Access Ranking

23 Mar. (Last 30 Days)

  1. Dependence of Carbon Concentration and Alloying Elements on the Stability of Iron Carbides ISIJ International Advance Publication
  2. Comprehensive Optimization Control Technology of Rolling Energy and Oil Consumption in Double Cold Rolling ISIJ International Advance Publication
  3. Experiments on Removal of Hydrophilic Fine Particles in Bubbly Flow ISIJ International Vol.59(2019), No.2
  4. Effects of Impurities and Processing Conditions in Al–1%Mn Alloys on the Formation of Thermally Stabilized Substructures MATERIALS TRANSACTIONS Vol.59(2018), No.11
  5. Coating Film Profiles Generated by Fluctuating Location of the Wiping Pressure and Shear Stress ISIJ International Vol.59(2019), No.2
  6. Temperature Field Distribution of a Dissected Blast Furnace ISIJ International Advance Publication
  7. Evolution of Blast Furnace Process toward Reductant Flexibility and Carbon Dioxide Mitigation in Steel Works ISIJ International Vol.56(2016), No.10
  8. Effect of EAF Slag Temperature and Composition on its Electrical Conductivity ISIJ International Vol.59(2019), No.2
  9. Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) Iron Ore Sinter Bonding Phase Formation: Effects of Basicity and Magnesium on Crystallisation during Cooling ISIJ International Vol.59(2019), No.2
  10. Molecular Dynamics Simulation of Carbon Effect on the Thermal Physical Properties of the Molten Iron ISIJ International Vol.59(2019), No.2

Search Phrase Ranking

23 Mar. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. galvanizing
  5. tuyere abrasion
  6. tuyere erosion
  7. tuyere failure
  8. isij
  9. lme
  10. wear on tuyere