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很多学生对数学学习投入的热情正在日益减退,一方面是因为随着数学学习的不断深入,学生所要学习的知识变得复杂和抽象,另一方面,在一定程度上学生学习数学的方式是被动地听讲、练习、记忆和考试,多数学生把上数学课作为一种精神负担,小是“我要学”而是“要我学”. 相似文献
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In this paper, we study the effect of moving bottlenecks on traffic flow. The full velocity difference (FVD) model is extended to the traffic flow on a two-lane highway, and new lane changing rule is proposed to reproduce the vehicular lane changing behavior. Using this model, we derive the fundamental current-density diagrams for the traffic flow with the effect of moving bottleneck. Moreover, typical time-space diagram for a two-lane highway shows the formation and dissipation of a moving bottleneck. Results demonstrate that the effect of moving bottleneck enlarges with the increase of traffic density, but the effect can be reduced by increasing the maximum velocity of heavy truck. The effects of multiple moving bottlenecks under different conditions are investigated. The effect becomes more remarkable when the coupling effect of multiple moving bottlenecks occurs. 相似文献
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目前代理体的研究已成为国外AI(人工智能)领域的一个新热点,但国内学者对此尚未给予必要的关注。在参考大量国外文献的基础上,就很有发展空间的代理体理论的各主要方面作了简要的概述。内容包括代理体基本概念、代理体结构模型、代理体学习。并预测了代理体理论最有前途的应用领域。 相似文献
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The novel concept of Compound-Agent is proposed, which consists of some independent sub-agents that share common beliefs and employ community actions. The Explicit Model of Coordination, which is used in the coordination of the sub-agents of Compound-Agent, is provided. The actions of each sub-agent are rule-based determined, and the rule base can be adjusted on time. The approximate fuzzy reasoning is used to improve the speed of learn and reduce the number of rules, which makes Compound-Agent suitable for real time and dynamic applications. A real application, the design of the control system of flat-knitting machine employing the concept of Compound-Agent, is discussed briefly. 相似文献