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分析金属知识在中考和教材中的地位,针对当前单元复习教学中存在的问题,依据教学评一致性原则,将“金属知识”的单元复习在“订书钉”为主要线索的探究活动中展开,以此激发学生的学习兴趣,优化学生单元知识结构,发展学生分析问题、解决问题的能力,同时提高学生对学科价值的认识。 相似文献
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Based on passive theory, this paper studies a hybrid chaotic dynamical system from the mathematics perspective to implement the control of system stabilization. According to the Jacobian matrix of the nonlinear system, the stabilization control region is gotten. The controller is designed to stabilize fast the minimum phase Lorenz-Chen chaotic system after equivalently transforming from chaotic system to passive system. The simulation results show that the system not only can be controlled at the different equilibria, but also can be transformed between the different chaotic attractors. 相似文献
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