The clinical manifestations of obliterative bronchiolitis commonly known as BOS ( bronchiolitis obliterans syndrome), of which clinical manifestations are lung function decline, that is, forced expiratory volume in 1 second and FEF decreasing.

FEF ( Forced Expiratory Flow Rate) was measured in 92 smokers without respiratory symptom and 78 healthy non-smokers.

本文对92例无症状吸烟者及78例不吸烟健康人进行最大呼气流速的测定。

There was no difference in FEV 1, FEF 50 between slight asthma group and remission group;

与缓解组第1秒用力呼气流量（FEV1）、50%肺活量时最大呼气流量（FEF50）比较，轻度哮喘组无统计学意义（P0.05）；

Study on Structure of Surface Modified FeS Nanoparticles

表面改性FeS纳米微粒的结构表征

Properties of Cu/ FeS Composites Improved via Hot Extrusion Deformation

热挤压变形改善Cu/FeS复合材料的性能

Research on the stimulation pattern which is based on FES cycling train

基于FES cycling训练的刺激模式的设计与研究

Study on Dynamic Recrystallization Behavior and Performance of FeS/ Cu Composites

FeS/Cu材料动态再结晶行为与性能研究

Because of this, precise control is quite difficult around the trimmed position and as you move the stick you will suddenly feel the FFB kick in.

因此，精确控制在被整理的位置附近是相当困难的，并且，因为您移动棍子您将突然感觉FFB起动。

After 20 carbonation/ regeneration cycles in the FFB, the sorbent sorption capacity has decreased sharply.

吸附剂在FFB上20次吸附/再生循环之后，吸附剂转化率出现明显下降。

HSE is a kind of Internet possessing control function. The flexible function block ( FFB) is the special function of HSE technology.

HSE是一种具有控制功能的Internet，而柔性功能块（FFB）是HSE技术的独特功能。

FFB algorithm domain is presented to manage FFB instance for the realization of FFB dynamic instantiation.

同时使用柔性块算法域对象管理柔性块，实现柔性块动态实例化。

Study on Anti-Jamming Performance of FFH/ MFSK System

FFH/MFSK系统抗干扰性能研究

Secondly, the multiple access interference problem in FFH/ MFSK system is analyzed.

然后，分析了FFH/MFSK通信系统中存在的多址干扰问题。

FFT-based Detection of Existence of Synchronization Signal for FFH System

基于FFT的快速跳频同步信号存在性检测

A New ALE Calling Method In FFH/ FSK System

短波快速跳频系统下新的ALE呼叫方法

Research of Communication Technology Using FFH/ DS Hybrid Spread Spectrum

FFH/DS混合扩频体制通信技术研究

FFH system is an important spread-spectrum system, which has excellent anti-interference capacity and causes great attention in the research field of military communication.

作为扩频通信体制中的一种重要类型，快速跳频系统因其出色的抗干扰、抗截获和抗人为阻塞能力，在当前军事通信研究领域引起广泛关注。

The Soft-decision and Erasure Decoding Method in FFH Systems

软判决与消去解码方法在快速跳频系统中的应用

Objective It is to explore the prognostic value of fetus Fibronectin ( fFN), length of cervix uteri and formulation of cervix infundibulum detected by vagina sonography for premature delivery.

目的探讨检测早产高危孕妇宫颈分泌物中胎儿纤维连结蛋白（fFN），阴道超声检查宫颈长度、宫颈漏斗形成情况预测早产的价值。

Objective To study the relationship of fetal fibronectin ( FFN), Bacteria vaginosis ( BV) and chorioamnionitis. To evaluate the diagnostic value of FFN for chorioamnionitis.

目的通过检测胎儿纤连蛋白（FFN）研究细菌性阴道病和绒毛膜羊膜炎的关系，为产前早期诊断绒毛膜羊膜炎提供新方法。

The experiment showed that the baking effect was good when FFN was 91~ 158 s and the comprehensive baking effect was the optimum when FFN was ( 91 s).

实验表明：FFN值的范围在91~158s时，烘焙效果较好，FFN值91s时，综合烘焙效果达到最佳。