FLL

A Study on Carrier Tracking FLL for Extremely-low-CNR Highly-dynamic Signals

极低载噪比高动态信号的载波跟踪锁频环研究

FLL and PLL extract phase by CORDIC algorithm , and adopt 21-grade pipeline structure , ensuring high extraction accuracy and reducing the circuit delay effectively .

锁频环与锁相环在提取相位时，采用了基于CORDIC算法的复数相位提取算法，通过采用21级的流水线结构方式在保证了较高的提取精度的情况下，有效的减少了电路的延时。

The Study of Carrier Tracking Based on FLL and PLL

基于FLL和PLL的载波跟踪技术研究

Technology of carrier tracking for high dynamic signals based on FLL and PLL cascade

基于FLL与PLL级联的高动态载波跟踪技术

There exists necessity and certain requirements for adult students'autonomous FLL .

成教学生外语自主学习有其必要性和要求。

The mastery of vocabulary meaning is difficult in foreign language learning ( FLL ) .

掌握词汇意义是词汇学习的重点与难点之一。

Motivation is regarded as a key factor in FLL . It has considerable influence on learning achievement .

在外语学习中动机被视为一个重要的因素，它对学习成果有相当大的影响。

FLL / PLL Combination-Based Approach to Carrier Tracking Applied in Navigation Receiver

基于FLL/PLL相结合的载波跟踪在导航接收机中的应用

The Explanative and Procedural Semantics of FLL Analysing Prolog from advantage of process

FLL语言的说明性语义与过程性语义依据过程性优势分析Prolog程序语言

Methods The diagnostic capability and given confidence by using conventional ultrasound and CEUS were assessed in 305 cases with FLL .

方法模拟日常超声检查工作情景检测常规超声和CEUS对305例FLL的定性诊断性能和诊断者的信心强度。

Objective To investigate the clinical merit of contrast-enhanced harmonic ultrasonography with low mechanical index in the differential diagnosis of focal liver lesions ( FLL ) .

目的探讨低机械指数谐波超声造影在肝脏局灶性病变良、恶性诊断的价值。

Whereas , with more and more fashionable ideas striking the field of FLL , this traditional way of learning seems to be out of date .

然而，随着越来越多的时髦的学习方法对外语学习领域的冲击，人们似乎认为这种传统的学习方法有些落伍。

The GPS signal tracking algorithm includes a 4-quadrant frequency discriminator of the carrier , an FLL of carrier and a DLL of the code .

GPS信号跟踪算法主要包括载波的四象限鉴频器算法、载波频率锁定环和码的延迟锁定环算法。

Objective To evaluate the clinical merit of low mechanical index continuous contrast-enhanced ultrasound in the diagnosis of focal liver lesions ( FLL ) for differentiating benign from malignancy .

目的探讨低机械指数连续超声造影技术鉴别肝脏局灶性病变（FLL）良、恶性的应用价值。

To the question of Carrier Synchronization with low signal-to-noise ratio ( SNR ) and High Dynamic , using the method of combining FLL with PLL to actualize the carrier tracking .

针对极低信噪比高动态条件下载波同步问题，采用锁频环（FLL）和锁相环（PLL）相结合的方法来实现载波跟踪。

In the light of this , more researches have been made on affective aspects in FLL & FLT in China , but most of them are more theoretical and less practical .

因此，中国的外语教学越来越注重情感方面的研究，但多是理论性而少实际操作性。

Researches on language learning motivation ( LLM ) have been conducted for forty years in the field of foreign language learning ( FLL ) and second language acquisition - ( SLA ) .

有关语言学习动机的研究在外语学习和二语习得领域里已经进行了40多年。

I remember thinking on the first day I was going to fll madly in love with one of the boys and spend in next years of my life kissing and waltzing .

记得第一天我就想，我会疯狂地爱上某个男孩，以后就在耳鬓厮磨、卿卿我我和跳华尔兹舞中度过几年时光。

This paper is divided into three parts , which can be followed as the discussion of the principle and structure of DLL , FLL and PLL , procedure of signal processing and discriminator algorithm .

本文分三大部分依次讨论了DLL、FLL、PLL的原理结构，信号处理流程和鉴别器算法。

Objective To evaluate the usefulness of conventional ultrasound ( B mode ultrasound plus color Doppler imaging ) and contrast-enhanced ultrasound ( CEUS ) in diagnosis of focal liver lesions ( FLL ) .

目的评估常规超声（B型超声+彩色多普勒超声）和超声造影（CEUS）在肝脏局灶性病变（FLL）定性诊断中的有用性。

FLL is used to track the rapid changing frequency . When the frequency is guided to the scope of PLL , PLL tracks the change of phases and precisely locks the carrier frequency .

使用FLL来跟踪频率的快速变化，当频率引导到PLL可处理的范围时，通过PLL来跟踪相位的变化，精确的锁定载波频率。

A familiar high dynamic carrier track scheme based on FLL / PLL switch is introduced , and then a joint FLL + PLL carrier track scheme that is suitable for high dynamic circumstance is brought forward .

介绍了目前较常见的基于FLL/PLL切换的高动态载波跟踪方案，并在此基础上提出了一种适用于高动态环境下的FLL+PLL联合载波跟踪方案。

It is widely acknowledged that affect plays an important role in FLL & T. Teacher feedback is an important component of teacher talk , whose role in SLA as well as in EFL teaching cannot be neglected .

它在外语学习和教学中的重要作用已经得到了广泛的认可。教师反馈作为教师话语的一个重要组成部分，其在二语习得和外语教学中的作用不容忽视。

Conclusion Different FLL showed different enhancement patterns of the contrast-enhanced ultrasound , which provide the new basis for the differential diagnosis of FLL ; real time gray-scale contrast tuned imaging was a useful technique in differential diagnosis of FLL .

结论：不同FLL的超声造影增强模式可为鉴别诊断FLL提供新的依据，实时灰阶超声造影技术对鉴别诊断FLL具有实用价值。

In recent years , frequency locked loops ( FLL ) have been used in some space communication , remote control and remote measurement systems as tracking filters to track the targets having great dynamic parameters or the signals with rapidly varying phase .

在空间通信、遥控、遥测等领域，近年来国内外有些系统采用锁频环代替锁相环作为跟踪滤波器来跟踪卫星等大动态参数目标，或相位急剧变化的信号。

It was discovered that FLL could significantly promote the rate productive of colony of CFU-S in the depressed marrow , but could not stimulate the proliferation and differentiation of CFU-D in the diffussion chamber .

发现无细胞胎肝液能明显促进受抑制骨髓中多能造血干细胞（CFUS）的集落形成率，但对扩散盒内粒系祖细胞（CFUD）的增殖分化无促进作用。

There is a periodic phase coincidence phenomenon between two arbitrary frequency signals and the period of the phase coincidence is relation with the frequency relation of those two signals . Based on this principle a new FLL ( frequency locked loop ) is realized .

两任意频率信号间会出现周期性的相位重合现象且相位重合周期和两频率信号的频率关系密切联系，基于此原理实现了一种新型的锁频环。

Methods : The length of fetus liver ( FLL ), fetal liver length to femur soft tissue thickness ( FLL / FSTT ), the area of fetal liver ( FLA ) in 375 fetuses were measured with B mode ultrasound .

方法：应用B型超声测量395例胎儿肝脏长度（FLL）、FLL与股骨皮下组织厚度（FSTT）的比值（FLL/FSTT）、胎儿肝脏面积（FLA）。

In frequency synthesizer , especially in wideband ( synthesizer ,) phase noise at the middle-far band from carrier frequency will be improved effectively by adding a frequency-locked loop ( FLL ) to VCO . The FLL has become a key technology in advanced frequency synthesizer .

在锁相合成器中，特别是宽带合成器中，对VCO采用附加锁频环进行稳频控制，明显地优化了合成器载频中远区的相位噪声，锁频环已成为先进合成器的关键技术。