这项新的研究揭示了两种不同的睡眠驱力是如何对大脑产生影响的，一种是在正常清醒的状态下，另一种是在连续几天或几个星期缺觉的情况下。 许。

Thee new work shows how two different sleep drives impact the brain, one during the normal waking hours and the other over days and weeks of sleep loss.

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在实时模拟的计算过程中，根据游离体的碰撞情况、速度、当前受力的状态，选择中点插值法或欧拉法插值的数值计算方法，保证游离体的运动状态的连续性。

During simulation process, the program choose suitable numerical method: mid-point interpolation or Eulor, so the loose body moves sequent, according to collision, velocity and stress.

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