Urban environmental systems in present society have become large and complicated. Though, such upgrading of urban systems improves our standard of living, lots of intractable problems are also pointed out.
To tackle such problems in information society, In our laboratory, we have proposed to solve the above problem and grasp the basic structures using the “mathematical model”. Our research object seems vague because urban environmental system is a very large scale system, but we try to ``visualize the essential characteristics of system'' and show the future path for sustainable society.
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