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. 15 (2002), No. 4

  • Iterative Identification and LQG Control Design for Time Delay Systems

    pp. 159-166

    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.15.159

    This paper deals with an LQG control problem for input time delay systems using closed-loop identification. A virtual system is introduced to solve a spectral factorization, which does not include integral operator. The solution of the factorization is used as a prefilter of closed-loop identification. An iterative identification and control design method is applied and some numerical examples are shown.
  • A Cooperatively Coevolutionary Genetic Algorithm to the Dynamic Facility Layout Problems

    pp. 167-174

    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.15.167

    A cooperative coecolutionary genetic algorithm (CCGA) to the dynamic facility layout problems (DFLP) is examined. The CCGA has two major features. Firstly, a multi-population approach is adopted. The entire solution is constructed by individuals picked up from each population which corresponds to layouts of a production period in DFLP. An individual's fitness value is calculated with the best individuals of the other populations so that the populations can co-evolve in a cooperative manner. Secondly, steady-state selection process is embedded in each population to promote the exploitation in the genetic search. Computer simulations on two benchmark problems are conducted. It is found that the CCGA outperforms the other GAs consistently.
  • A Method of Information Filtering for Web Browsing Based on Dividing Web Pages

    pp. 175-183

    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.15.175

    We propose a method of information filtering for Web browsing based on a model of user's interests. We have already proposed Context-Sensitive Filtering (CSF) for browsing on CD-ROM encyclopedia, which follows up shifting user's interests in this case. We confirmed the effectiveness of CSF. However, it is not very effective for Web browsing. We assumed that one of the reasons is the difference of pages between the Web and CD-ROM encyclopedia. We describe improvements of modeling to estimate user's interests and filtering method by dividing Web pages. We confirmed the effectiveness of our filtering through an experiment to compare several filtering methods.
  • Non-Parametric Estimation of a Renewal Function Based on Histogram

    pp. 184-193

    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.15.184

    When the statistical data such as failure data, which are realizations of an i.i.d. random variable, are given, the histogram is often used to understand the underlying distribution property. In this paper, we propose a non-parametric algorithm to estimate the renewal function from the histogram. The estimation algorithm is based on the direct Rieman-Stieltzes integration method. Also, it can be improved in terms of estimation accuracy by applying the interpolation with the spline function or the radial basis function neural network. Finally, in numerical examples, we evaluate the proposed algorithm and its improved versions, and refer to the potential applicability of them.
  • Path Optimization in a Multi-Robot Welding System

    pp. 194-202

    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.15.194

    Multi-robot systems have been introduced actively in heavy industry in order to increase the productivity. However, since the configuration of workpiece is complex due to multi-kind small lot production especially in shipbuilding and in multi-robot systems robots are disposed as densely as possible in a working area to get high productivity, collision between adjacent robots could occur. Because the collision prevents effective production, collision occurrence should be avoided. This paper reduces the problem of minimization of total welding time subject to collision/deadlock avoidance among multi-robots to a path optimization one, and solves it through genetic algorithm (GA). Its effectiveness is shown by numerical simulations with practical workpieces. Furthermore, a two-step GA algorithm is proposed, where the welding path of the maximal loaded robot is optimized first and then those of other robots are optimized.
  • Scheduling to Maximize Profits in a Single Machine Model

    pp. 203-212

    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.15.203

    Various scheduling methods have been proposed in order to minimize total flow time or total actual flow time, and thereby promote efficient production. However, such methods are not so effective to maximize company profit, given that requests from customers and the prices of products have grown widely diversified in recent years. In such a case, it must be determined whether the profit can be maximized when both flow times are minimized. This paper proposes an optimal scheduling method which maximizes total profit as a performance measure in a single machine model. Our computational experiments show the usefulness and characteristics of the proposed method.
  • Hand-held 3D Scanner Using Two-stage Active Stereo Method

    pp. 213-219

    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.15.213

    A new 3D scanning device which consists of a hand-held 3D sensor head and a stereo camera, is developed. In the measuring process, the coordinates of observed points are computed relative to the 3D sensor head, and the 3D sensor head is located relative to the fixed stereo camera. The 3D coordinates of the measured object are reconstructed in the two-stage process. The unique two-stage method makes it possible to move the sensor head freely and to measure the whole shape of the object in one sequence, of scanning. In this paper, we describe the system structure, the principle of measurement, some examples of measurement and its accuracy.
  • Self-Tuning Two-Degree-of-Freedom PID Compensator Based on Two-Degree-of-Freedom Generalized Minimum Variance Control

    pp. 220-222

    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.15.220

Article Access Ranking

18 Jun. (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. A Kinetic Model of Mass Transfer and Chemical Reactions at a Steel/Slag Interface under Effect of Interfacial Tensions ISIJ International Vol.59(2019), No.5
  3. Improvement of Sinter Strength and Reducibility through Promotion of Magnetite Ore Oxidation by Use of Separate Granulating Method ISIJ International Vol.59(2019), No.5
  4. Evaluation of the Structure and Strength of Coke with HPC Binder under Various Preparation Conditions ISIJ International Advance Publication
  5. Effects of Surface Microstructure on Selective Oxidation Morphology and Kinetics in N2 + 5%H2 Atmosphere with Variable Dew Point Temperature ISIJ International Vol.59(2019), No.5
  6. Numerical Investigation of Applying High-carbon Metallic Briquette in Blast Furnace Ironmaking ISIJ International Vol.59(2019), No.5
  7. Evolution Mechanism of Inclusions in H13 Steel with Rare Earth Magnesium Alloy Addition ISIJ International Advance Publication
  8. Effect of Nut Coke Addition on Physicochemical Behaviour of Pellet Bed in Ironmaking Blast Furnace ISIJ International Vol.59(2019), No.5
  9. Formation of Non-Metallic Inclusion and Acicular Ferrite in Ti–Zr Deoxidized Steel ISIJ International Advance Publication
  10. Surface Tension Calculation of Molten Slag in SiO2–Al2O3–CaO–MgO Systems Based on a Statistical Modelling Approach ISIJ International Vol.59(2019), No.5

Search Phrase Ranking

18 Jun. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. deadman coke
  5. inclusions
  6. a structurally-based viscosity model of the fully liquid slags in the cao-mgo-al2o3-feo-sio2 system
  7. bubbling ladle
  8. isij xafs
  9. joo hyun park
  10. mold flux, b2o3