The diagnostic value of Doppler colour flow image ( DCFI) was assessed in a.

It is found that there is an optimum fiber length in DCFL at a defined pump power, and output mirrors with low reflectivity is better for high gain fiber lasers.

通过数值模拟计算，得到在一定的泵浦功率下存在最佳光纤长度，计算还表明输出镜的反射率越小光纤激光器的输出功率越大，可以采用光纤端面作为输出镜。

Based on the numerical analysis of rate equation, the power distribution along the fiber of Yb3+ doped double-clad fiber laser ( DCFL) under multipoint pumped is obtained.

采用数值方法求解速率方程，得出掺Yb3+双包层光纤激光器在多点泵浦条件下沿光纤长度上的泵浦光和信号光功率分布曲线以及输出功率。

Direct-coupled FET Logic ( DCFL) is an important logic family for GaAs FET LSI circuits because of its simple structure and good speed/ power performance.

直接耦合场效应逻辑（DCFL）具有简单的结构、良好的速度／功耗性能，是GaAsFETLSI电路中一种重要的逻辑形式。

Designing and Developing of HEMT DCFL Gate Circuits and Ring Oscillators with 1 μ m Gate-Length

1μm栅HEMT DCFL门电路及环形振荡器的设计与实验研究

Increasing inner clad radius and adopting different cooling measures such as air and water cooling also can lower operating temperature in DCFL.

增加内包层半径以及采取不同程度的制冷措施（风冷和水冷）可以降低DCFL的工作温度。

Simulation of Characteristics for GaAs IC DCFL Gate and Circuit Design

GaAs IC逻辑单元与或非DCFL特性计算机示波器方式模拟及电路设计

Power govern equations of DCFL are constituted. The characteristics of output wavelength, threshold power and slope efficiency of fiber laser are analyzed.

建立了双包层光纤激光器的功率传输方程，并对光纤激光器输出波长特性、阈值功率和斜效率进行了探讨；

The theory of DCFM can be derived from total probability theory ( TPT) based on the consideration of uncertainties in seismic demand analysis and seismic capacity analysis.

需求能力系数法以考虑地震需求分析和结构抗震能力分析过程中的不确定性为出发点，通过全概率的理论推导得到了衡量结构性能水准的性能指标&能力需求比和置信概率。

The paper discusses some methods of economic analysis especially the DCF curve aud DCFR used to analyze the economic profits and trends of oilfield exploration and development.

本文论述了在石油勘探开发中利用现金流动曲线和盈利率DCFR来分析油田开发经济效益的方法。

The Discrete Chirp Fourier Transform ( DCFT) proposed recently is an effective technique for chirp signal detection. But it requires some rigorous restrictions on the signal length and parameters. These requirements restrict the application of DCFT.

离散Chirp Fourier变换（DCFT）是最新提出的一种检测线性调频信号的有力技术，但它对信号的采样点数和信号参数有着近乎苛刻的约束条件，限制了它的工程应用。

In phase compensation, a new algorithm based on accurate target parameter estimation by use of discrete chirp-Fourier transform ( DCFT) transform is presented.

在方位向上，利用DCFT变换，对目标的运动参数进行精确估计并加以补偿，减小了回波相关性降低对相位补偿的影响。

Multi-Component LFM Interference Suppression Based on DCFT and FRFT in DSSS Communication System

DSSS中基于DCFT和FRFT的多分量LFM干扰抑制方法

Results: There were sudden changes of PR interval in the DCGs of all the 7 patients, and also the linking phenomenon and atypical Wenckebach ′ s phenomenon.

结果：7例患者的动态心电图均出现PR间期跳跃性的改变，并有蝉联现象及不典型文氏现象发生，呈DAVNP特征。

Analysis of DCGs of 757 Patients

757例动态心电图分析

The DCIP+ ascorbate → methyl viologen activity of this isolated heterocysts was 360 μ mol O_2 consumed/ mg Chl. h.

当提供DCIP和抗坏血酸时，被压碎的异形胞能够光还原甲基紫精，其活性为360消耗O2的微克分子/毫克叶绿素/小时。

DCIP needs a minimum of four studios on board before it launches the$ 1bn financing, which funds the conversion of about 15,000 screens to digital projection systems.

DCIP在进行10亿美元的融资之前，需要至少4家电影公司的支持。这笔融资将用于把大约1.5万块屏幕转换成数字投影系统。

In dark, electron flow from H_2O to DCIP and from DPC to DCIP was not affected by sulfite.

在黑暗条件下H2O→DCIP和DPC→DCIP的电子传递均不受影响。

Cd~ ( 2+) reduced the activity of photoreduction of DCIP and the variable fluorescence of chloroplasts and PS ⅱ preparation.

Cd~（2+）使叶绿体和PSⅡ制剂的DCIP光还原活性降低；可变荧光也受到抑制。

Bovine serum albumin stimulates the DCIP photoreduction activity of lettuce chloroplasts which has been treated with trypsin.

牛血清蛋白对被胰蛋白酶消化过的叶绿体光还原DCIP的活性有恢复作用。

A Comparison of Water-splitting Activity, DCIP Photoreduction Activity and Some other Characteristics in PS ⅱ Particles Isolated from Several Species of Plants

几种植物PSⅡ颗粒的水裂解活性、DCIP光还原活性与某些性质的比较