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词汇 ppf
释义 ppf 英'piːp'iː'ef美'piːp'iː'ef COCA¹³⁶¹⁵⁸BNC¹⁰⁴⁵⁸⁴⁺Economist²⁰⁴⁰⁷⁺
基本例句
n.磅;生产可能性边界Production Possibility Frontier.
Effects of polypropylene fiber PPF on properties of phosphate cement-based concrete, such as flowability, operable time, flexural and compressive strength were investigated.
主要研究了聚丙烯纤维 PPF对磷酸盐混凝土性能如流动性、可操作时间、抗折和抗压强度的影响。 dictall

It was resulted that the method was practicable and significant in modifying the Chinese standard of PPF testing.
测定试验结果表明,该方法是可行和实用的。因而,对修订透性测定的国家标准具有指导意义。 chemyq

The mechanism of the formation of PPF and the effects of the main experimental conditions are discussed respectively.
探讨了正丁胺等离子体聚合膜的形成机理和传感器主要检测条件的影响; cnki

The methods of harmonic suppression were introduced, such as adopting passive power filter PPF, active power filterAPF, hybrid filter and harmonic protective device HPD.
介绍了谐波治理的方法,即采用无源滤波器、有源滤波器、混合型滤波器及谐波保护器,举例说明了谐波保护器的应用。 dictall

The preparation technology of peanut protein isolatePPI from low- denatured peanut protein flour PPF by ultrasonic wave was studied.
以低变性花生蛋白粉为原料,研究了花生分离蛋白的超声波制取工艺。 dictall

Therefore, Passive power filter PPF is most widely used as harmonic- eliminating device in power system, because of simple configuration, low investment, high reliability, and low operation cost.
无源电力滤波器因其结构简单、设备投资少、运行可靠性高、运行费用低,成为电力系统中最普遍的谐波抑制设备。 dictall

This paper presented an experimental study on a positive position feedback PPF control of a cantilevered flexible beam using PZT patches.
利用压电陶瓷传感器得到的反馈信号,通过正位反馈算法计算出控制信号。 dictall

PPF can suppress switch's drop-out peak- voltage and magnetic biasing by adding a clamping capacitor on primary side of the traditional push- pull converter's transformer.
通过在传统推挽电路的变压器原边增加箝位电容,抑制了开关管电压尖峰和电路的偏磁。 dictall

Article1: the import of cotton fiber PPF5 micron filtration equipment, the primary raw can remove sediment, rust and impurity in grain and organic matter.
第一级:进口5微米 PPF纤维棉的初级过滤设备,能清除原水中泥沙、铁锈及杂质颗粒和有机物。 lietongkeji

Based on plasma polymerized film PPF and polyelectrolyte, a novel piezoelectric immunosensor is developed for the determination of transferrin in human serum.
报道了一种基于等离子体聚合膜、结合聚电解质设计的转铁蛋白压电免疫传感器。 cnki

By making use of MATLAB to build the system model, PPF and APF are put in the simulation respectively.
利用 MATLAB软件在计算机平台内搭建系统模型,分别利用有源和无源两种方式对系统进行补偿。 fabiao

Considering limitations of the passive power filter PPF, a reform method of PPF for low voltage power grid was presented.
针对无源滤波器的缺陷,提出了一种低压电网无源滤波器改造方案。 cnki

Hybrid active power filter combined by APF and PPF, learning from both their strong points to offset their weaknesses, can be applied for high power harmonic control and reactive power compensation.
由 APF和 PPF组合构成的混合型有源电力滤波器可使二者取长补短,实现大功率下谐波抑制和无功补偿。 boshuo

In this paper, the mathematical models for computing permeability of plastic film PPFwere established and a new method was developed, to test PPFrapidly, correctly and conveniently.
本文通过对塑料薄膜透过系数计算的数学模型的建立,得出了一种快速、准确和便利的测定塑料膜透性的新方法。 chemyq

On the basis of installed PPF, connecting active power filter to PPF by small inductor, a hybrid active power filter was designed.
在已安装无源滤波器的基础上,将有源滤波器通过小电感与无源滤波器相连,设计了混合有源滤波器。 cnki

The effects of polyvinyl alcohol fibers PVAF, polypropylene fibers PPF, basalt fibers BF and air-entraining agents on the impermeability of modern cement-based materials are studied.
研究了聚乙烯醇纤维 PVAF、聚丙烯纤维 PPF、玄武岩纤维 BF和不同掺量引气剂对现代水泥基材料抗渗性的影响。 airiti.com

The blanketed zone of support jamming is computed by the pattern propagation factor PPF with different reflection coefficient and carrier frequency.
在不同反射系数不同雷达载频下,利用方向图传播因子计算了远距离支援干扰压制区。 dictall

The investors, which will include the Pensions Protection Fund PPF—the backstop for private-sector schemes—will own the entire capital structure and can divide cashflows as they like.
包括养老金保护基金 PPF该基金支持私有部门方案在内的投资者将会拥有整个资本结构,而且可以随意划分现金流转。 ecocn

The PPF capacitor parameters are realized by the multi- objective optimal program in MATLAB.
编写MATLAB语言的多目标优化程序,求得无源电力滤波器的电容参数。 fabiao

There has been speculation in the Russian media that PPF might be preparing to sell its presence there to a major Russian retail bank such as Sberbank or VTB.
在俄罗斯存在一些投机, PPF可能准备出售他的主要俄罗斯零售银行,例如西伯利亚银行和俄罗斯国有银行 VTB。 yeeyan

PPF Group also underlines that Russia remains a priority market in its investment strategy.
PPF集团同时强调,俄罗斯仍是他投资战略的优先考虑的市场。 yeeyan
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