fcg

in order to drive a high impedance load such as hpm sources, it is necessary to commutate fcg's long pulse width, high-current and low voltage pulse to a short pulse with high voltage.

为用FCG驱动象HPM源这样较高阻抗的负载，必须使用脉冲功率调制电路把FCG产生的低电压、大电流、上升时间长的电压脉冲转化为高电压、上升时间短的脉冲。

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the results showed that the over-all coincident rate and positive rate of fcg were 20.65% and 25.34% higher than those of ecg, respectively.

实验结果表明：与心脏γ照相结果比较，FCG对冠心病诊断的总体符合率和阳性符合率分别比ECG高20.65%和25.34%。

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objective to study the effects of the body position changes on fcg in pilots so as to explore the possibility of using fcg as an indicator of medical monitoring and medical support.

目的探讨体位改变对飞行员频域心电图（FCG）的影响，为FCG指标在航空航天医监医保工作中应用提供依据。

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as fcg's performance depends on the load greatly, the power conditioning circuit should take both fcg and the load into account.

由于FCG的输出与负载密切相关，调制电路模型需要与FCG和负载结合起来考虑。

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aircrafts' life and reliability require aeronautical aluminum alloy has excellent anti-fatigue and corrosion properties. the microstructure of alloy and its complex service environment have close relationship with its fatigue crack growth ( fcg) performance.

飞机的寿命和可靠性要求航空铝合金具有优良的耐疲劳及腐蚀损伤性能，合金的微观组织与其所处的复杂服役环境对合金的疲劳裂纹扩展性能有着密切关系。

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the paper presents a data flow distributing fcg algorithm, analyses the shape and parameters of ecg power spectrum, and gives a contrast example.

本文用数据分流FCG算法分析心电信号的功率谱图形的形状和参数并给出对照实例。

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FCG, as a power spectral estimation of electrocardiogram, is a new technique of heart inspection.

频谱心电图（FCG），即心电信号的功率谱估计图，是一种心脏检查新技术。

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it indicated that the simulation results were consistent with the experimental results, therefore, an effective method for predicting the fcg properties under the residual stress field induced by lp was provided.

表明模拟分析与实验结果的一致性较好，为激光喷丸诱导残余应力场下疲劳裂纹扩展特性的预测提供了一种有效的方法。

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at last, an orthogonal test designing method is proposed to study the influences of various fcg and power conditioning circuit parameters on the system performance, to find out those most influential factors and to make them optimized.

最后文中提出应用了正交试验设计方法对影响FCG和脉冲功率调制电路性能的参数进行研究，以此来确定影响系统运行的主要因素和优化参数的努力方向。

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during investigation of the effect of applied potential on corrosion fcg rates, polarization was switched on for a time period in which it was possible to register the change in the crack growth rate corresponding to the open-circuit potential and to measure the crack growth rate under polarization.

在外加电压对于腐蚀疲劳裂纹扩展速率影响的研究过程中，在一段时间内发生极化，可以根据此期间内的开路电压记录裂纹扩展速率，并测量极化情况下的裂纹增长速率。

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firstly, an equivalent circuit for a common fcg is discussed and influences of fcg's design parameters on its current and energy amplification are obtained.

首先从FCG的基本原理和结构出发，通过等效电路模型，得到了FCG工作过程中各种参数对其电流和能量放大影响的一般规律。

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Equivalent Damage Model for Predicting FCG Life Under Random Spectrum Loading

随机谱下疲劳裂纹扩展的等损伤模型

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it indicates that the diagnostic standard of fcg for normal people can be used to pilots, so it might be useful in selection and real-time medical monitoring during ground training.

说明正常人FCG的诊断标准适用飞行员，所得结果各项数值可用于飞行员的选拔和地面训练时实时医学监督。

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Preliminary Study on the Weight Control Model for FCG of BF

高炉料流调节阀重量控制模式初探

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Experiments with FCG show that voltage breakdown and fabrication tolerance causes most of the flux losses.

从FCG装置的实验中得到了FCG设计中存在的主要问题是击穿和装配公差。

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the system can instantly calculate fatigue crack lengths, stress intensity factors and fatigue crack growth ( fcg) rates using the load values and displacement values collected by itself with compliance method.

该系统适用于频率不高于250Hz的疲劳试验，可以实时地将采集到的载荷位移数据用柔度法转换为裂纹长度，并计算出相应的应力强度因子范围和裂纹扩展速率。

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a novel power conditioning circuit for flux compression generators ( fcg) to drive high impedance loads is presented.

爆磁压缩发生器一般具有较低阻抗，在驱动较高阻抗负载时需要脉冲功率调制电路。

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the effect of the normalized k-gradient c on low or near-threshold fcg rate is examined and a simplified expression is proposed for low and intermediate fcg rate.

考查了名义K梯度C对于低速或近门槛速率测试的影响，提出了适用于低、中速疲劳裂纹扩展速率的一种简单表达式。

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by means of this expression, much money will be saved because the fcg rates can be predicted from the tensile properties without additional empirical modification and low temperature fatigue test, if the endurance limit and fcg threshold at room temperature are predetermined.

若室温疲劳极限和裂纹扩展门槛值已定，利用该式可根据拉伸性能预测材料的低温疲劳裂纹扩展速率而不需任何低温疲劳试验和经验修正。

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in recent years, attention has been given to fcg's application in generating high-power microwaves ( hpm).

近年来，利用FCG产生高功率微波（HPM）的研究受到了重视。

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Result The grade distribution and abnormal cases of the FCG varied with the body positions.

结果体位改变使得FCG的级别分布、异常指标等随体位改变而发生了相应的变化。

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a 2 d axisymmetric nonlinear explicit finite element dynamic analysis program is applied to compute the armature expansion process of the magnetic flux compression generator ( fcg).

建立了爆炸磁压缩装置（FCG）的2D轴对称有限元模型，应用显式非线性动力分析程序进行求解，得到了爆磁压缩装置电枢膨胀过程的图像。

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frequency domain correlative cardiogram ( fcg) is a relatively new noninvasive method for diagnosis of coronary heart disease.

为评价正常人频域心电图（FCG）的诊断标准是否适合飞行员。

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Set of New Microcomputer Aided System for Comprehensively Measuring FCG

一种新的微机辅助疲劳裂纹扩展综合测试系统

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the effects of loading frequency on hcf and fcg in salt water for this precipitation-hardening stainless steel are different.

在频率效应方面，负荷频率的改变对于高周疲劳性质及疲劳裂缝成长速率有不同的影响。

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The sensitivity, specificity and accuracy of FCG were 87.5%, 77.8% and 82.9%, respectively, which were slightly less than those of RNV ( 92.5%, 88.9% and 90.8%, respectively).

FCG与RNV评价冠心病人左心室功能的敏感度，特异度和准确度分别为87.5%、77.8%、82.9%与92.5%、88.9%、90.8%（P>0.05）。

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FCG behavior of alloys under ultrasonic fatigue loading

超声振动载荷下合金的疲劳裂纹扩展性能研究

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frame connection graph ( fcg) is used to represent the knowledge and then interpreted by using directed graph theory ( dg theory), and finally translated into first-order logic.

我们先用框架连接图（FCG）表示知识，进而用有向图（DG）理论解释，最后转换成一阶逻辑。

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in the dissertation, comprehensive investigation of the helical fcg and of the power conditioning circuit is carried out theoretically, numerically and experimentally.

本文通过理论总结、数值模拟和实验等手段较深入地考察了螺旋型FCG装置和脉冲功率调制系统的设计与优化等问题。

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explosively driven magnetic flux compression generators ( fcg) are a type of compact pulsed power sources.

爆炸磁通量压缩发生器（FCG）是一种紧凑的脉冲功率源。

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