Kiyoshi Nakayama

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To noninvasively quantify tissue elasticity for differentiating malignancy of soft tissue, we previously proposed a two-dimensional (2-D) mechanical inverse problem in which simultaneous partial differential equations (PDE's) represented the target distribution globally of relative shear moduli with respect to reference shear moduli such that the relative(More)
—In this paper, a novel distributed control technique, which integrates tie-set graph theory with an intelligent agent system, is presented to distribute renewable energy resources to consumers in a future large-scale power grid connecting with huge amounts of real-time end-use devices on its demand side automatically and perfectly. Using the proposed(More)
—In this paper, we propose a mechanism for coping with double-link failures in an autonomous and distributed manner. We call it Tie-set Based Fault Tolerance (TBFT) because it utilizes tie-sets, which represent a set of the edges comprising a loop within the graph that represents the network. An autonomous distributed control method based on dividing a(More)
—We formulate an Optimal Real-Time Power Flow (ORPF) problem that integrates renwable energy generation and energy storage. In the ORPF problem, we seek to minimize the costs of energy storage and of power generation from fossil fuel that are required to balance the loads and generation from renewable sources. We present a novel decentralized algorithm for(More)