弱分层虽然也能抑制传热传质，但不稳定、容易被破坏。
Although weak stratification can also prevent heat and mass transfer, it's unstable and easy to be destroyed.
为解决具有非线性、强耦合和绝对不稳定特点的自平衡两轮机器人的运动控制问题，提出一种分层模糊控制方法。
To the nonlinear, strong-coupling and absolutely unstable characteristics of self-balancing two-wheel robot, a hierarchical fuzzy control method is proposed.
但在不稳定性心绞痛患者中，基质金属蛋白酶的水平与CD 40l的相关性以及与不稳定性心绞痛患者的危险度分层、发生心脏事件的预测价值方面尚缺乏进一步的探索。
But it is short of further exploration in the correlation between matrix metalloproteinase and CD40L or risk stratification and predicting the value of heart incidence in unstable angina.
目的：探讨心肌梗死溶栓疗法（TIMI）危险评分在不稳定心绞痛（UA）患者危险分层及预后预测中的作用。
Objective:To investigate the role of TIMI risk score in risk stratification and predicting outcomes in patients with unstable angina.
目的：探讨心肌梗死溶栓疗法（TIMI）危险评分在不稳定心绞痛（UA）患者危险分层及预后预测中的作用。
Objective:To investigate the role of TIMI risk score in risk stratification and predicting outcomes in patients with unstable angina.
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