查询词典 decreasing amplitude

The comparative analyses are made between 65 seiche processes with the amplitude greater than 50 cm(the amplitude greater than 80 cm in Longkou Harbor) in main harbors along the coasts of the Bohai Sea and the Huanghai Sea and the surface weather charts.

对渤海、黄海主要港湾发生的振幅大于 50cm(龙口港湾取振幅大于 80cm)的6 5次假潮过程与地面天气图进行对比分析，着重分析了伴随大振幅假潮过程的天气形势。

In the study of the stochastic chaos in simple pendulum, the random Melnikov process is derived and the mean-square criterion is used to determine the threshold amplitude of the bounded noise excitation for the onset of the chaos or random chaos in the system. For the coupled simple pendulum and harmonic oscillator, the Melnikov function is used to determine the condition for the onset of chaos in the case of Hamiltonian perturbations. In the case of non-Hamiltonian perturbation, the generalized random Melnikov process and mean-square criterion are used to determine the threshold amplitude of the bounded noise for the onset of random chaos.

在随机混沌研究中，应用随机Melnikov过程的均方准则研究了单摆在有界噪声激励下发生混沌或随机混沌时有界噪声激励的临界幅值；对于耦合的单摆-谐振子系统，先用Melnikov函数研究了在哈密顿扰动下发生混沌的必要条件；然后用推广的随机Melnikov过程方法研究了在非哈密顿扰动下发生随机混沌的必要条件；用最大Lyapunov指数及Poincaré截面方法结果与上述理论结果作了对比。

Results show that amplitude of displacement excited by vertical incidence wave is larger than that excited by inclined incidence wave and not influenced greatly by the incidence angle. In vertical incidence, amplitudes of displacement of two points at the same altitude along each cavern are basically identical and maximum relative displacement occurs between top and bottom point of the cavern. While in the case of inclined incidence, displacement amplitude on sides meeting the wave is larger than that on leed sides, and maximum relative displacement occurs on left skewback and bottom of the cavern.

结果表明，位移幅值受入射角度的影响不敏感，竖直入射比斜入射情况要大；竖直入射时，各洞室两侧同一高程处的位移幅值基本相同，相对位移差最大部位为洞顶与洞底，而斜入射时迎波面比背波面一侧位移大，且相对位移差最大部位为洞室迎波面的左拱座与洞底。

In the aspect of the study of the application of HHT method, This dissertation has done three part of jobs: first, the Elcentro strong ground motion which is in common use in earhtquake engineering is analyzed by HHT method, getting its amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; second, the typical nonlinear system defined by the Duffing equation is analyzed by HHT method, getting its numerical value's amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; third, define the stationary degree of non-stationary signals making use of 3-D time-frequency spectrum and marginal spectrum, the stationary degree curve of Elcentro seismic recording is protracted according to its defining formula, the stationary degree curve of Elcentro seismic recording which change with time is protracted according to similiar definition.

在HHT方法的应用研究方面，本文做了三部分的工作：首先，利用HHT方法分析了地震工程中常用的Elcentro非平稳强震记录，得到了该记录的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；其次，应用HHT方法分析了典型的非线性系统－Duffing方程，得到了该方程数值解的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；最后，利用三维时频谱与边际谱定义了非平稳信号的平稳度，并依照其定义式绘制了Elcentro地震波记录的平稳度曲线，依照类似与依赖与频率变化的平稳度定义，初步尝试编程绘制了Elcentro地震波随时间变化的平稳度曲线。

Based on vector of relative amplitude and sum vector of relative amplitude, CODAD propulsion system s excitation torque under different V firing angle was studied.

以相对振幅矢量和相对振幅矢量和为基础，对CODAD 推进系统在不同排间发火间隔角情况下的激励力矩变化进行了研究。

Based on vector of relative amplitude and sum vector of relative amplitude,CODAD propulsion systems excitation torque under different V firing angle was studied.

以相对振幅矢量和相对振幅矢量和为基础，对CODAD推进系统在不同排间发火间隔角情况下的激励力矩变化进行了研究。

A method for analytical calculation of the resonance length for ultrasonic torsional fatigue samples is recommended. The angular displacement amplitude and torsional stress/strain amplitude on the surface of samples are derived.

介绍了一种超声疲劳扭转试样谐振长度解析计算方法，并给出了扭转谐振状态下试样表面的角位移和应力应变分布函数。

Research on spectrum line refractive index of triangular prism with spectrometer measuring;2. The amplitude spectrum line and the amplitude spectrum function are proposed for the airborne particle scattering light signal,and their properties are studied in probability space.

针对粒度仪标定的准确度，在概率空间基础上，提出了尘埃粒子散射光信号幅度概率谱线和散射光信号幅度概率谱函数的概念，并对谱线在概率空间下的性质进行了研究。

At last, we studied the problem of amplitude distortion during the wavefields extrapolation and imaging in DSR equation migration, and then proposed a true amplitude angle-domain imaging formula based on Born-WKBJ approximation.

另外，本文还探讨了DSR方程偏移波场延拓与成像过程中的振幅失真问题，并初步给出了基于Born-WKBJ近似的真振幅角度域成像公式。

The early affective priming ERPs effect was characterized by a longer P2 peak latency and decreased P2 peak amplitude for control condition as compared to primed and unprimed conditions; the late affective priming ERPs effect consisted of a shorter P3 latency and attenuated P3 peak amplitude for primed condition as compared to unprimed condition.

5在阈下启动任务中，对于P2、P3成分的潜伏期与波幅，述情障碍组与非述情障碍组之间均不存在显著差异；在阈上启动任务的两个SOA水平中，述情障碍组的P2成分和P3成分波幅均显著小于非述情障碍组的波幅。

You have to walk your own alk in this life.

次生中你必须走自己的路。

To start with, the thesis analyses ***ism in terms of the generic masculine words, word order and semantic derogation of women in greater detail.

论文首先从阳性词泛指，词序，词义的贬降等方面对英语中的性别歧视现象进行了详细的分析。