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高速公路的高路堤、护栏、高架桥、中央隔离带以及匝道等形成高速公路系统界壳,高速公路系统和环境间车流交换机制在很大程度上取决于界壳的结构和属性,界壳结构和属性的研究是高速公路界壳控制理论研究的基础。运用界壳理论,结合布尔代数及可拓学方法,探讨高速公路系统界壳拓扑结构,研究其长度、开放度、交换率、张力、压力、界门数量等界壳属性的定量表述以及位置、类型、宽度、长度等界门属性的标记;建立适于描述匝道控制的界壳和界门属性物元模型;分析匝道控制与界壳物元属性值的变化关系。研究表明结合布尔模型和物元模型可以较好地描述高速公路系统界壳属性,高速公路匝道控制的实质是通过调节高速公路界壳开放度使实际界壳物元接近理想物元的过程。
Expressway systems such as high embankments, guard rails, viaducts, central isolation belts and ramps are formed in expressway systems. The mechanism of interchange between expressway system and environment depends to a large extent on the structure and properties of the crust, the crust structure and The study of attributes is the basis of the theoretical research on the control of the boundary of expressway. Using the shell theory, combined with Boolean algebra and extenics method, this paper discusses the topological structure of the critical shell of expressway system, and studies the quantitative description of the shell properties such as length, openness, exchange rate, tension, pressure, Type, width, length and other properties of the door; established suitable for describing the ramp control of the boundary layer and the door attribute matter-element model; analysis of the ramp control and the boundary element attribute value changes. The research shows that the Boolean model and the matter-element model can describe the properties of expressway system’s shell well. The essence of freeway ramp control is to adjust the openness of freeway shell to make the actual shell material close to the ideal object.