lfr

Conclusion LFR for the patients with hemorrhagic traumatic shock maybe improve the outcome .

结论救治创伤失血性休克限制液体复苏法可能优于积极液体复苏法。

Firstly it introduces the methods and fundamental in institutional change theory and explains the meaning of LFR .

文章首先对制度变迁分析方法及基本原理进行了介绍，并界定了劳企关系概念。

LFR zonal propagation direction displays obvious difference with the time , the difference may be caused by zonal flow variation .

中国中部区域低频降水纬向传播特征是在不同时间低频降水的纬向传播方向有明显差别，初步认为造成这种现象的可能机制是纬向风气流的变化；

Features of summer monsoon LFO and LFR over beijing-tianjing-hebei area in 1998

1998年京津冀夏季风的低频振荡与降水的特征

Based on the analysis before , it discusses the significant characters of target model of LFR and the system demand of the LFR model in China .

在得出劳企关系目标模式的选择依据后，文章着力研究了劳企关系目标模式的基本特征以及基于我国劳企关系目标模式的制度需求。

The Loss-Less Resistor is realized using a switch mode circuit technique and a storage element to reduce the lose of LFR .

由于无损耗电阻器可由理想开关阵列和电路储能元件组成，所以损耗极小。

In analyzing flight path data , power spectral density is computed to obtain the frequency range and times of LFR using the Shannon theorem .

首先计算实际航迹信号的功率谱密度，得到航迹的频谱范围，依据Shannon定理初步确定激光重频值。

X is LUR space if and only if X is LFR space and has ( WM ) property .

X是LUR当且仅当X是LFR且具有（WM）性质。

Loss-free resistor ( LFR ) generates great pulse current because of the switching process , and its equivalent resistor is also time variable .

无损电阻由于开关元件的存在而产生很大的电流脉冲，其等效电阻也是时变的，这严重限制了无损电阻的应用。

It is proved both in theory and from practice that the LFR times can meet the performance specifications of laser echo rate while guaranteeing the tracking precision .

理论分析和工程实际表明，在保证跟踪精度的情况下，该激光重频值将满足回波率的技术指标要求。

Under the assumption of line movement with constant velocity , the flight path is built such that prediction error variance computed by the LFR times meets the specified requirements .

进一步从建立航路的的预测误差要求出发，在匀速直线运动的假设下，使用该激光重频值，激光测距的预测误差方差能达到工程要求。

In the context of NCEP / NCAR reanalysis and real precipitation daily data in 1998 , propagation variational mechanisms of low-frequency rainfall ( LFR ) over China in 1998 are studied .

使用美国NCEP/NCAR再分析和中国实际降水的逐日资料，研究了1998年夏季中国区域低频降水传播变化的机制。

Essential reason of neutral-point potential LFR under conventional single-modulation-wave carrier-based PWM ( SMWPWM ) on some conditions is analyzed . A sufficient condition for completely eliminating LFR is proposed .

利用该模型分析了传统单调制波载波PWM在部分条件下无法完全消除中点电位低频波动的本质原因，提出了完全消除中点电位低频波动的充分条件。