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. 25 (2012), No. 2

  • A Connection Admission Control Method for Web Server Systems

    pp. 19-27

    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.25.19

    Most browsers establish multiple connections and download files in parallel to reduce the response time. On the other hand, a web server limits the total number of connections to prevent from being overloaded. That could decrease the response time, but would increase the loss probability, the probability of which a newly arriving client is rejected. This paper proposes a connection admission control method which accepts only one connection from a newly arriving client when the number of connections exceeds a threshold, but accepts new multiple connections when the number of connections is less than the threshold. Our method is aimed at reducing the response time by allowing as many clients as possible to establish multiple connections, and also reducing the loss probability. In order to reduce spending time to examine an adequate threshold for web server administrators, we introduce a procedure which approximately calculates the loss probability under a condition that the threshold is given. Via simulation, we validate the approximation and show effectiveness of the admission control.
  • Energy-Efficient Power Assist Control Methods for Periodic Motions

    pp. 28-38

    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.25.28

    This paper considers power assist control methods for periodic motions. In most power assist applications, additional force is applied in proportion to the instantaneous value of force generated by human. However, human persistent tasks are sometimes periodic and it can be shown that the proportional assist is not optimal for such motions in the sense of energy efficiency. Therefore, we propose power assisting methods to suppress the velocity fluctuation similar to the repetitive control. We compare the effectiveness and the energy efficiency of each method through numerical simulation and experiments.
  • Stopping Rules for Linear Stochastic Approximation

    pp. 39-44

    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.25.39

    Stopping rules are developed for stochastic approximation which is an iterative method for solving an unknown equation based on its consecutive residuals corrupted by additive random noise. It is assumed that the equation is linear and the noise is independent and identically distributed random vectors with zero mean and a bounded covariance. Then, the number of iterations for achieving a given probabilistic accuracy of the resultant solution is derived, which gives a rigorous stopping rule for the stochastic approximation. This number is polynomial of the problem size.

Article Access Ranking

18 Feb. (Last 30 Days)

  1. Segregation Mechanism of Al-based Oxides on Surface of Zn-0.2mass%Al Hot-dip Galvanized Steel Sheets 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. Effect of Silicon, Manganese and Heating Rate on the Ferrite Recrystallization Kinetics ISIJ International Advance Publication
  4. A Review on Prevention of Sticking during Fluidized Bed Reduction of Fine Iron Ore ISIJ International Vol.60(2020), No.1
  5. In-situ Phase Identification of Crystallized Compound from 2CaO·SiO2–3CaO·P2O5 Liquid ISIJ International Advance Publication
  6. Physico-chemical Properties of Mill Scale Iron Powders ISIJ International Advance Publication
  7. Preface to the Special Issue “Intelligent Abnormality Diagnosis for Steel Works by Using Area Sensing” Tetsu-to-Hagané Vol.106(2020), No.2
  8. A Data-Driven Multiobjective Dynamic Robust Modeling and Operation Optimization for Continuous Annealing Production Process ISIJ International Advance Publication
  9. Development of High Accuracy Segmentation Model for Microstructure of Steel by Deep Learning ISIJ International Advance Publication
  10. Ironworks Conveyor Monitoring Using Mirror-drive High-speed Active Vision Tetsu-to-Hagané Vol.106(2020), No.2

Search Phrase Ranking

18 Feb. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. corrosion resistant steel
  5. direct contact heat transfer
  6. ferrite bainite steel
  7. direct contact
  8. isij
  9. jats
  10. kosasih