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. 14 (2001), No. 10

  • An Imanishism-based Genetic Algorithm for Seeking Various Optimal Solutions of the Module Placement Problem

    pp. 467-474

    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.14.467

    In order to find the plural number of optimal solutions for the module placement problem, which is of particular significance in the design of VLSI, a new Genetic Algorithm (GA) based on Imanishi's evolutionary theory is proposed. First of all, a phenotypic distance between two solutions, or individuals, is defined as the shortest Hamming distance between sets of isomorphic genotypes. If the phenotypic distance between two individuals is shorter than a threshold value, they are regarded as the same species. Then, a new generation alternation model that is analogous to the habitat segregation is presented. Since each individual in the population represents an isolating species, the diversity of the population is maintained spontaneously. Even though the selection of individuals based on their fitness is not employed, excellent individuals are created effectively by using the harmonic crossover operation combined with a local optimization method.
  • Non-Convex Relaxation to the Space of Hypercomplex Numbers for Indefinite Quadratic Programming-Properties and Optimization Algorithms

    pp. 475-482

    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.14.475

    This paper addresses a sort of non-convex relaxation problem for the minimization problem of a quadratic function. We define relaxation problems by generalizing the feasible region of the original problem to the space consisting of hypercomplex numbers. Computational experiments for 0-1 quadratic minimization problems reveal the effectiveness of two proposed algorithms based on the derived properties. Fundamental properties of the relaxation problem for a more general class of quadratic minimization problems are also discussed.
  • Sampled-Data HDesign of Interpolators

    pp. 483-489

    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.14.483

    A design procedure for interpolators is developed based on sampled-data control theory. The procedure provides an interpolator which minimizes the L2-induced norm of the error system between the interpolator and a time-delay, and the L2/l2-induced norm of the system between the quantization noise and the output of. the interpolator. While the system is multirate and has delay elements, the design problem can be reduced to a finite-dimensional discrete-time problem using the FSFH (fast-sample and fast-hold) approximation. Numerical examples are presented to illustrate the effectiveness of the proposed method.
  • Tracking of a Maneuvering Target with Unknown Course and Speed Using Extended Kalman Filter

    pp. 490-498

    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.14.490

    In this paper, an effective tracking method for a maneuvering target moving at unknown variable speed on the 2-dimensional plane is proposed. First, dynamics are derived for the target which moves at variable speed by introducing the first-order dynamics for the target's jerk motion as a modified Singer model. Next, in order to get highly accurate tracking, the kinematic constraints are incorporated into measurement equation as pseudomeasurements. Based on the extended Kalman filter algorithm, the tracking filter is derived from the linear dynamics and the augmented nonlinear measurement equation. The efficacy of this method is shown by simulations using real data.
  • Congestion-Driven Parallel Placement Procedure for LSI Cells Based on Hybrid Genetic Algorithm

    pp. 499-510

    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.14.499

    A congestion-driven placement technique for LSI cells through hybrid genetic algorithm is presented. In particular, the procedure consists of a two-level hierarchical placement procedure and a hybrid genetic algorithm, in which the algorithm is combined with the approach of searching locally for an optimal solution. For selection control, new objective function are introduced to each phase for dispersing congestion, and a parallel processing technique suited to hierarchical placement is proposed as an effective approach to accelerating the processing speed of genetic algorithm-based placement. Regarding to total virtual wire length and wire congestion, the ratio of the proposed approach to the conventional one is 0.76 and 0.9, respectively. As a result, the effectiveness of the suggested approach is shown through a comparison with the conventional one.
  • Relationships among Known Subclasses of Systems that Havea Common Lyapunov Function

    pp. 511-513

    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.14.511

Article Access Ranking

20 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  4. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  5. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4
  6. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  7. Automatic Ultrasonic Testing of Non-metallic Inclusions Detectable with Size of Several Tens of Micrometers Using a Double Probe Technique along the Longitudinal Axis of a Small-diameter Bar ISIJ International Vol.61(2020), No.1
  8. Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal ISIJ International Vol.61(2021), No.4
  9. Method for Evaluating Hydrogen Embrittlement of High-Strength Steel Sheets Considering Press Formation and Hydrogen Existence State in Steel ISIJ International Vol.61(2021), No.4
  10. Effect of Rare Earth Ce on the Morphology and Distribution of Al2O3 Inclusions in High Strength IF Steel Containing Phosphorus during Continuous Casting and Rolling Process ISIJ International Vol.61(2021), No.3

Search Phrase Ranking

20 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. blast furnace permeability
  4. slag
  5. blast furnace productivity
  6. ultrasonic inclusion
  7. activity coefficient of ti in liquid iron
  8. continuous casting of electrical steel
  9. deoxygen in liquid iron
  10. electrical steel and continuous casting