Basic Research on the Evaluation of Robustness and its Improvement for the Social Infrastructure System in the Risk Management System

(1)We提出了定量度量和评价一般网络结构系统稳定性、鲁棒性和可靠性的理论和方法。应用该方法的实际网络系统，如交通道路网络系统在东京和马尼拉，供水系统，在东京和雅加达，我们得到了数值结果，测量这些系统的鲁棒性，包括比较分析。我们对上述方法的理论贡献包括定义一般网络系统的稳定连通性函数，发展计算算法，并获得近似函数，这些函数是从网络中删除任意数量的边和节点得到的，对应于任意数量的边和节点是“破”的假设。“我们的研究成果包括几篇发表在日本和国际学术期刊上的文章。(2)We建立了铁路线路维修计划模型， ...更多信息 已经在日本多家铁路公司使用。该模型是一个优化型的数学规划模型，其标准被定义为最大限度地改善轨道不平顺数据，并给我们一个MTT系统的年度运营计划。我们的研究成果包括在日本和国际学术期刊上发表的几篇文章。(3)We为了得到一个适当的和理想的日本粮食安全政策，利用数学规划技术制定了日本粮食供应系统的数学模型。模型的目标是在限制小麦、大豆、玉米等基本食品从几个主要粮食出口国进口的各种限制条件下，从战略上尽可能提高日本的自给率。我们的研究成果包括在国际学术会议上介绍这些模型公式和数值结果。(4)We建立了电力自由化问题的数学规划模型。模型的目标包括获得最佳引进的多元化发电厂，如MGT，GT和其他。少

(1)We developed the theory and the methodology for quantitatively measuring and evaluating stability, robustness and reliability for the general network- structured system. Applying the methodology to the actual network systems such as traffic road network systems in Tokyo and Manila, and water supply systems, in Tokyo and Jakarta, we obtained numerical results for measuring the robustness of those systems including comparative analyses. Our theoretical contribution to the above approach includes defining stable connectivity function for the general network system, developing computational algorithm, and obtaining approximate functions, which are derived from deleting arbitrary number of edges and nodes from the network corresponding to the assumption that arbitrary number of edges and nodes are "broken." Our research results include several articles which appeared in both Japanese and international academic Journals.(2)We developed the railway track maintenance scheduling model, which … More have been already used in several Japanese railway companies. The model is an optimization-type mathematical programming model whose criteria is defined to be the maximum improvement for the track irregularity data, and gives us an annual operating schedule for the MTT system. Our research results include several articles which appeared in both Japanese and international academic journals.(3)We have formulated mathematical model of the Japanese food supply system using mathematical programming techniques in order to obtain an appropriate and desirable food security policy for Japan. The model objective includes strategically improving Japan's self sufficiency ratio (SSR) as much as possible under the various constraints such as import restriction of some basic food items such as wheat, soybean and corn from several major food exporting countries. Our research results include presentations of these model formulations and numerical result in international academic conferences.(4)We developed the mathematical programming model to deal with the electricity liberalization problems. The model objective includes obtaining optimal introduction of diversified power generating plants such as MGT, GT and others. Less