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)
SUMMARY In this paper, a novel decentralized algorithm is proposed to minimize power flow loss in a large-scale future grid connecting with many real-time distributed generation systems by which power flows bi-directionally. The DC-power loss at each link is defined as the product of resistance and the square of current that can be considered as a quadratic(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)
—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)