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. 26 (2013), No. 10

  • A Modeling of Pedestrian Flow Including the Effect of Personal Space

    pp. 345-354

    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.26.345

    The understanding of the pedestrian behavior in the crowd is indispensable for the assessment of urban layout and various approaches are reported for evaluating the safety of the social infrastructures. In this paper, a simulation model of pedestrian flow is introduced based on the Mixed Logical Dynamical (MLD) system approach. The effect of personal space is newly investigated from the viewpoint of the path-planning and an alternative pedestrian flow model is proposed based on the MLD system description. The feature of the proposed model is illustrated with typical simulations and the relation between the congestion and the effect of personal spaces is evaluated in the evacuation and bi-directional flows.
  • Stability Analysis of Discrete-time Interconnected Positive Systems using Weighted l1-induced Norm

    pp. 355-364

    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.26.355

    In this paper, we study the stability analysis of discrete-time interconnected positive systems by means of a weighted l1-induced norm, where the weighted l1-induced norm is computed from the l1 norm of the input and output signals evaluated with given weighting vectors. In the literature,it was shown that the weighted L1-induced norm of continuous-time LTI positive systems can be characterized by linear programming problem (LP). Moreover, the weighted L1-induced norm was proved to be useful for the stability analysis of interconnected positive systems. On the basis of these results, we first show that the weighted l1-induced norm of discrete-time LTI positive systems can be again characterized by LP. From this preliminary result, we can construct a transformation from a given discrete-time positive system to a continuous-time positive system, where the weighted L1-induced norm of the resulting system is equivalent to the weighted l1-induced norm of the original system. By means of this key transformation, we can readily extend the continuous-time case results to the stability analysis of discrete-time interconnected positive systems.
  • Delivery Date Optimization as a Resource Allocation Problem and its Heuristics based on Dynamic Programming

    pp. 365-373

    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.26.365

    We propose a novel optimization problem for a vehicle delivery planning and its effective heuristics based on dynamic programming (DP). Novelty of the problem is that each delivery item has a designated delivery date with a certain relaxation window. Then, the minimum delivery cost can be decreased compared with the rigorous delivery date problem. The optimization of the actual delivery dates is formalized as 0-1 integer programming, which can be reduced to a resource allocation problem. DP is then applicable for the rigorous optimization, though the computational cost is large. Here we proposed a heuristic approach based on DP. First, the value function, which is obtained through recursive steps in DP, is approximated by a linear programming relaxation based on the method proposed by Bertsimas et al. Next, a search of the optimal solution at each recursive step is bounded by setting a threshold. Furthermore, the number of recursive steps can be shortened according to a characteristic time scale of a target problem. The proposed heuristics are applied to the target delivery problem, and detailed numerical calculations on various size problems with various parameter settings show the effectiveness with a largely reduced computational time.

Article Access Ranking

24 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. Temperature Field Distribution of a Dissected Blast Furnace ISIJ International Advance Publication
  6. Coating Film Profiles Generated by Fluctuating Location of the Wiping Pressure and Shear Stress ISIJ International Vol.59(2019), No.2
  7. Effect of EAF Slag Temperature and Composition on its Electrical Conductivity ISIJ International Vol.59(2019), No.2
  8. 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
  9. Evolution of Blast Furnace Process toward Reductant Flexibility and Carbon Dioxide Mitigation in Steel Works ISIJ International Vol.56(2016), No.10
  10. Structure Based Viscosity Model for Aluminosilicate Slag ISIJ International Advance Publication

Search Phrase Ranking

24 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. lme
  9. wear on tuyere
  10. 鉄と鋼