PFM

The Realization of PFM by Using Optical Communications Demonstration System

用光通信实验系统实现脉冲频率调制

The PFM technology includes two kinds modes : constant width PFM and SWFM .

脉冲频率调制又包括了两种方式，即等宽PFM和SWFM。

The Design of PFM Power Management IC Using the Minimum Off Time Control Theory

利用最小关断时间控制原理的PFM电源管理芯片的设计

Study of High-Frequency Induction Heat PFM System Based on Soft-Switching Technology

基于软开关技术的高频感应加热扫频系统的研究

The Research of Optical Fiber Video Transmission System of a Double Frequency PFM

倍频式PFM光纤视频传输系统的研制

Three-dimensional Finite Element Analysis of Stress Distribution of Anterior Teeth PFM

前牙PFM颈缘三维有限元受力分析

Application of PFM to Study on Safety Margin of COD Design Curves

PFM方法在研究COD设计曲线安全裕度上的应用

Clinical reports of high level shoulder in PFM for the elderly

老年人后牙烤瓷修复高位肩台应用体会

Clinical using of combined impression method in post and core PFM crowns

寒天琼脂和藻酸盐类联合印模法在桩核烤瓷冠中的应用

Application of PWM & PFM mixed control soft-switching technique to welding power source

软开关逆变电源的PWM与PFM混合控制技术在焊接电源中的应用

Soft switching control of high frequency induction welding power supply with PWM and PFM

高频感应焊接逆变电源PWM和PFM软开关控制

Design and application of PFM neural network VLSI

脉频调制神经网络VLSI的设计及应用

Design for PFM Fibre Optic Audio & Video Transmission Systems

音视频脉冲频率调制光纤传输系统的研制

The application of PFM in the reconstruction of fracture anterior teeth

金属烤瓷冠在折断前牙修复中的应用

One Kind of Current Resonance PFM Soft Switch DC-DC Converter

一种电流谐振PFM软开关DC-DC变换器

The structure of the transmission system in the PFM optic transmitter is designed .

本文的研究工作有以下几个方面：设计PFM光发射机的传输系统结构。

Objective To study the patients satisfaction with PFM crown of anterior teeth .

目的了解患者对前牙烤瓷冠修复效果的主观评价。

Corrosion Behavior of Ni-Cr PFM Alloy Fabricated by Laser Rapid Forming Technology

激光快速成形镍铬烤瓷合金腐蚀性能研究

Influence of the thickness of metal and porcelain upon mechanical property of PFM

金属与瓷层厚度对PFM力学性质的影响

A digital control circuit for realizing PFM and PWM and their automatic switching

一种可实现PFM和PWM及其自动切换的数字控制电路

The Clinic Study of the Gingival Health Influence of Two Methods preparing PFM Shoulder

金属烤瓷冠肩台制备方法对牙龈健康影响的临床研究

The Analysis and Design of PWM / PFM Automatic Switching DC-DC Converter

PWM/PFM自动切换降压DC-DC转换器的分析与设计

Methods To reproduce the PFM with surface stain technique and watch results .

方法：对烤瓷冠采用外源性染色技术进行再加工，观察临床效果。

Group two , PFM with porcelain covering the whole neck margin ;

第2组，全瓷颈缘技术的金属烤瓷全冠；

According to the MC philosophy and method system , the requirement analysis of PFM is done .

依据MC的哲理和方法体系，对PFM进行了需求分析。

Clinical effect of using light-cure technique to repair porcelain fracture in PFM

光固化法修复金属烤瓷修复体崩瓷的临床效果研究

A pulse frequency modulation ( PFM ) with discrete frequency is designed .

设计了一种离散频率的PFM控制方式。

Objective To evaluate the clinical results of PFM restoration and prosthodontics .

目的金-瓷修复体的临床效果评价。

Design of a Low Power PFM Boost DC-DC Converter

一种低功耗PFM升压型DC-DC开关变换器设计

PFM was utilized to investigate fatigue effect in ferroelectric thin films .

研究中，用PFM反转薄膜电畴，以研究铁电薄膜的疲劳性能。