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題 名 | New Topologies in the Fundamental Diagram of a Cellular Automata Traffic Flow Model |
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作 者 | Ez-Zahraouy, H.; Jetto, K.; Benyoussef, A.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 44:6 民95.12 |
頁 次 | 頁486-502 |
分類號 | 331.312 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | We propose a traffic flow model in which vehicles are fixed at their maximal velocities, the fast cars run with Vmax₁, whereas the slow ones run with Vmax₂. Using new overtaking rules which deal with the deterministic NaSch model, it is found that the fundamental diagram exhibits three new topologies, depending on the fractions ffast and fslow of fast and slow vehicles, respectively, in which the current profile displays two branches with negative slopes and two branches with positive ones. Moreover, in the second branch of the fundamental diagram, the model exhibits an absorbing phase transition in which the behaviour of the order parameter fd and the current J is described by power laws. In this case, it is found that the system presents a univeral scaling law. On the other hand, a simple change in the rule of overtaking induces a metastability, which depends on the state of the chain instead of the external parameters [4–6]. Furthermore, in the case of random fractions of vehicles, the fundamental diagrams are similar to the experimental results [7,8]. |
本系統中英文摘要資訊取自各篇刊載內容。