phf怎么记

It was began with a brief introduction of different CAC schemes based on the occupancy of the system resource or signal quality, and then emphasis on the CAC schemes for controlling handoff failure probability ( Phf), including reserving resources, queuing and optimum CAC.

简要介绍基于小区资源占用情况和基于信号质量的两类进行呼叫接入控制的考察角度，并着重介绍预留资源、业务排队、最优化方法等控制切换掉线率的CAC算法及其优缺点分析。

The effect of plasma parathyroid hypertensive factor ( PHF) from 153 essential hypertensive subjects on pressor response in normotensive rats was evaluated and plasma levels of parathyroid hormone ( PTH) in these patients were measured.

探讨153例原发性高血压患者血浆中甲状旁腺高血压因子（PHF）对正常大鼠的升压作用，并测定了血浆中的甲状旁腺素（PTH）水平。

With the further study, it is found that Tau protein can result in neurodegeneration caused by aggregation of microtubule, the Tau protein aggregation caused PHF also can lead to neurodegeneration.

随着人们的深入研究发现Tau蛋白除了引起微管的解聚导致神经细胞的死亡以外，由Tau蛋白聚集形成的PHF也可以引起神经细胞的死亡。