Sheng-Yi Hsu

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The virtual economy operates like the one in the physical world, which is realized by players with two functions–demand and supply, only using the form as avatars. Only that in virtual worlds, the prices of virtual items is decided by the players instead of by its quality or scarcity, so the player behavior analyses became an important tool to monitor the(More)
Adaptive tracking control of mobile robots requires the ability to follow a trajectory generated by a moving target. The conventional analysis of adaptive tracking uses energy minimization to study the convergence and robustness of the tracking error when the mobile robot follows a desired trajectory. However, in the case that the moving target generates(More)
Complex economic phenomena require significant time and effort to make observations and collect data. Inspired by the concepts of indicator species and the Big Mac index, in this paper we propose a novel and intuitive market concept, indicator products, for analyzing purchase decisions that are made on a regular basis, and for helping online game designers(More)
*Correspondence: mhshih@math.ntnu.edu.tw Department of Mathematics, National Taiwan Normal University, 88 Sec. 4, Ting Chou Road, Taipei, 11677, Taiwan Abstract Stability of general equilibrium is usually depicted by a dynamic process of price adjustment which makes the flow of prices eventually come to rest at certain prices, so that the supply and demand(More)
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