Intermediate frequency instability has had the most uneven history.
中频不稳定性的研究经历了极为曲折的道路。
Low and intermediate frequency instability models are taken up first.
首先处理低频和中频不稳定性的模型。
A formula for analyzing the low frequency instability of the tube grain engine is derived through theoretical study.
通过研究导出一个分析管状装药发动机低频不稳定性的关系式。
The theoretical analyses predict that the drift wave is the most dangerois low frequency instability in the hot electron plasma.
理论上预示了在热电子等离子体中，等离子体漂移波是最重要的低频不稳定性。
Numerical results showed that the proposed boundary could simulate the influence of far field and did not have the problem of low-frequency instability.
数值分析结果显示，该边界可较好地模拟远场介质的作用以及土体的辐射阻尼，具有良好的低频稳定性。
The low-frequency instability in variable speed constant frequency doubly fed induction generator(DFIG) widely used in wind power generation is investigated.
研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。
Mechanism of the oscillation instability is then illuminated in frequency domain by amplification at the artificial boundary and multi-reflection of wave motion in a finite discrete model.
根据波在人工边界的放大效应和在有限离散模型中多次反射的概念在频域内阐明了这一常见的振荡失稳的机制。
The nonlinear high frequency combustion instability process in the liquid rocket engine is simulated with the method of nonlinear dynamics.
采用非线性动力学方法对液体火箭发动机非线性高频燃烧不稳定工作过程进行了研究。
The main effect of inflectional instability mode in the final breakdown seems to interact with the disturbances having developed and thus widens the frequency spectrum to turbulent state.
属于拐点不稳定性的高频二次不稳定模态对最后转捩的影响主要体现在与其它扰动的相互作用，并导致出现紊流状态宽带频谱。
It also can be used in solving multi-constraint optimization problem, such as constraints on stresses, strains, maximum displacements, natural frequency and buckling instability of structure, etc.
可解决多约束问题，约束条件考虑了应力、应变、最大位移、固有频率及结构屈曲失稳等多种因素。
The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.
利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性，给物理参数的识别造成困难。
The results indicate that the effect of the assimilation has a closed correlation with the frequency and precision of observation, has an instability brought by .
试验证明：同化效果的好坏与观测精度和观测频率密切相关，存在由于线性化和闭合假设带来的不稳定现象；扩展卡尔曼滤波本身具有强迫纠错作用。
If the public address system is operated below but too close to the instability condition the frequency shifter can reduce effectively the interference of the regenerative reverberation.
若语言扩声系统临近不稳定状态工作，频移器可以有效地减少再生混响干扰。
The leading-edge serrations have no effect on the instability noise peak frequency.
前缘锯齿对边界层不稳定噪声峰值频率没有影响。
Explosive mode coupling of low frequency interchange instability in partially ionized plasmas is studied.
本文研究部分电离等离子体中交换不稳定性的爆炸型模耦合。
Low or intermediate frequency combustion instability generally involves the interaction of several components of an engine system.
低频或中频燃烧不稳定性通常包含发动机系统中几个组件的相互作用。
There is limited evidence that the mechanism for high frequency combustion instability lies in the vaporization and combustion processes.
有限的证据表明，高频燃烧不稳定性机理取决于汽化和燃烧过程。
This paper presents computation and analysis of tangential mode of high frequency combustion instability in FY-20 liquid propellant rocket engine by means of the annular instability model.
本文用环形不稳定性计算模型计算、分析了FY -20液体火箭发动机的切向高频燃烧不稳定性。
Through the frequency spectrum analysis of earthquake waves and the dynamic instability regions analysis, the dynamic stability of serial system can be judged under a certain earthquake wave.
通过地震波的频谱分析，结合体系的动力失稳区间分析，可判断在某竖向地震作用下，串联体系并无发生失稳的可能。
The bipropellant gas-liquid coaxial orifice-swirl injector has great effects on the high-frequency combustion instability of the LOX/kerosene staged combustion cycled engine.
气液同轴直流离心式喷嘴对补燃发动机燃烧室高频燃烧稳定性有显著影响。
It is shown that the flow instability with high frequency belongs to acoustic oscillation and the flow instability with low frequency is density wave instability.
高频脉动属于声波型脉动，低频脉动属于密度波型脉动。
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
The analysis results also indicate rub-impact faults induced by oil-film instability can produce some low-frequency components with small amplitude and oil whip can produce half frequency component;
油膜失稳引起的转定子碰摩故障，会产生一些低频成分，油膜振荡会产生半频成分；
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