pfw

Synthesizing process and dielectric properties of Ca-doped PFW are investigated .

研究了在钨铁酸铅（PFW）中添加Ca2+的合成过程及相应的介电性能。合成方法采用B位先驱体合成法。

Among them , the personal firewall ( PFW ) software is the best choice for personal users .

其中个人防火墙软件是个人用户的最佳选择。

The friction and wear behaviors of the PFW / PU coatings filled MoS_2 and graphite are dependent on the applied load .

同时，负荷和速度对添加MoS2与石墨的聚四氟蜡/聚氨酯复合涂层的摩擦磨损性能有很大影响。

When the content of PFW in Kevlar fabric composite is 20 % , the Kevlar fabric composites can obtain the best friction-reducing and anti-wear properties .

当PFW质量分数为20%时，Kevlar纤维织物复合材料的摩擦系数减小75%、磨损率降低82%，Kevlar纤维织物复合材料的减摩抗磨性能最佳。

Through an analysis of crystal chemistry and sintered mechanism for PFW . it has been shown that addition of PFW to PZN can decreases or suppresses the formation of pyrochlore phase .

通过对PFW结晶化学和烧结机理的分析，证明在PZN中添加PFW能减少或抑制焦录石的形成。

PFW was added based on PWM , and switching circuit between PWM , PFW and control circuit of external characteristic were designed , the control system fulfilled the higher request , and have double excellence of PWM and PFM .

在PWM控制的基础上引入PFM控制，并设计出PFM与PWM的切换电路及外特性控制电路，实现了设计的控制要求，使整个控制系统具有PWM和PFM的双重优点。