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1·Two types of resonance are studied, fundamental and principal parametric resonance.

研究了其基本参数共振和主参数共振两种情况。

2·The method of multiple scales was used to solve directly the nonlinear differential equations and to derive the nonlinear modulation equation for the principal parametric resonance.

以轴向基础窄带随机激励悬臂梁非线性动力学方程组为分析对象，采用多尺度法，获得了系统主参激共振的非线性调谐方程组。

3·A variable length simple pendulum model is introduced, elementary analysis and perturbation analytic solution of nonlinear differential equation for parametric resonance are presented.

采用可变长度单摆的力学模型对秋千振荡给出初等分析，采用微扰近似法导出了秋千的非线性参数共振解析解， 并进行了讨论。

4·This paper investigates the subharmonic parametric resonance problems of a symmetric orthotropic laminated rectangular plate with simply supported edges by the use of the singularity theory.

在分析与探讨脉动轴向力作用下梁的参数共振问题时，本文取四种边界条件来分析第二阶次谐波参数共振的稳定区域，确定了零解与非零解的稳定性。

5·Parametric vibration of an axially moving, elastic, tensioned beam with pulsating speed was investigated in the vicinity of subharmonic and combination resonance.

研究速度变化的轴向运动粘弹性梁在亚谐波共振及组合共振范围内的参数振动。

6·This paper introduces the data processing of functional magnetic resonance imaging (fMRI) of brain based on statistical parametric mapping (SPM).

介绍了基于统计参数图的脑功能磁共振成像数据处理方法。

7·This paper deals with the threshold condition of double resonance parametric oscillation when the absorption coefficient of the signal light is different from that of the idling light.

在信号光和闲置光吸收系数不同的情况下对双谐振参量振荡阈值条件进行了分析。

8·Parametric instability or resonance is more dangerous than ordinary resonance as it is characterized by exponential growth of the response amplitudes even in the presence of damping.

参数不稳定或共振比普通共鸣，因为它是由具有危险反应指数增长幅度甚至在阻尼的存在。

9·In this paper, microwave resonance parameters test system has been studied, and on this condition, a set of resonance parametric test systems is tentatively built.

本文是教研室主要针对微波谐振参数的测试系统进行了研究，在此基础上试探性地搭建了一套通过式谐振腔谐振参数测试系统。

10·The principal resonance of a second-order stochastic oscillator under combined harmonic and random parametric excitations is investigated.

研究了二阶线性系统在谐和与随机噪声联合作用下的主共振响应和稳定性问题。