This phenomenon is called the free oscillation of the Earth. 这种现象被称为自由振荡的地球。
The data of the earth spherical free oscillation can be used to invert focal mechanism of this earthquake and to explore the inner structure of the earth. 该地震的地球自由振荡信息,可用于地震震源机制研究和地球内部结构研究。
Free oscillation laser has been widely applied in scientific research and production, so it is very neccesary for us to study free oscillation laser ignition of explosives. 自由振荡激光广泛运用于科研与生产,研究自由振荡激光引爆机理是相当有意义的。
Using Rayleigh-Ritz method, this paper investigated the free oscillation of a liquid drop in zero gravity environment, and presented the natural frequencies a. 用瑞利-里兹法研究了失重液滴的自由晃动问题,给出了液滴自由晃动的频率和模态函数。
Hamiltonian function was fitted with the test data, which were the value sets of phase coordinates measured in free oscillation of the systems, and the parameters were identified with the least square method. 利用系统自由振荡条件下相坐标测量值集合对系统的哈密尔顿函数进行拟合,并用最小二乘法进行参数识别。
The nonlinear oscillation of electron on the central axis of charged ring is studied. After setting up the motion equation, the exact solution and the period of free oscillation are achieved with elliptic integrals. The nonlinearity of oscillation are discussed and illustrated. 研究电子在电环轴上的非线性振动,在建立电子的运动方程后利用椭圆积分求得自由振动的准确解及周期,讨论和图示其非线性振动特征。
The one is the nonlinear free oscillation of conservative system. 其一是保守系统的非线性自由振动;
The results of simulations indicate that the amplitude of the free oscillation goes to a stable nonzero with a weak jamming signal and turns zero with a strong jamming signal, but the oscillation within the bounds of some frequencies is complex with a small ( jamming) signal. 仿真结果表明,弱信号使自由振荡项趋于一个非零的定常振幅,大信号使得自由振荡项衰减为零,而小信号则使某些频率区域中的振荡情况更复杂。
The theoretical calculation of the free oscillation of the earth and the dispersion of the surface waves 地球自由振荡和面波频散的理论计算
The Free Oscillation of Climate Evolution Aircraft Limit Cycle Oscillation 气候演化的周期振荡飞机极限环振荡
This paper includes in two sections: the first section is about the research and resolution of the parameters of the Earth's liquid core free nutation, and the second section involves in the research and detection of the earth free oscillation. 本文的研究工作包括两个研究方向:上篇是液核自由章动常数的研究与检测,下篇是地球自由振荡的研究与检测。
Spherical mode of the earth free oscillation excitated by the earthquake in the west to the Kunlun mountain pass recorded by China digital seismograph network 中国数字地震台网记录的昆仑山口西地震的球型自由振荡
In order to discuss motion, a kind of nonlinear dynamical free oscillation equation of the shallow cylindrical latticed shell is solved. 为了讨论分岔和混沌运动,对一类非线性系统的自由振动方程进行了求解。
Toroidal Mode of the Earth's Free Oscillation Excited by the Earthquake to the West of the Kunlun Mountain Pass 昆仑山口西地震激发的地球环型振荡
Interpolation perturbation method for solving the positively damped strongly nonlinear free oscillation problems 有正阻尼时强非线性自由振动问题的插值摄动解法
Thus the data of the earth toroidal free oscillation can be used to explore the 3-dimensional structure ( density structure, velocity structure) or anisotropy of the earth and help to disclose the convection mode in the whole mantle or in the upper mantle. 因此地球自由振荡信息可用于揭示地球的三维不均匀结构信息或各向异性信息,并可能对区分地幔对流模式(全地幔对流或上地幔对流)有所帮助。
In this paper, the author completed the connection survey of a vertical shaft simply and precisely by the observation method of free oscillation. 本文根据作者多年建井测量的实践经验,采用自由摆动观测方法,简单快捷、高精度地完成立井联系测量中的坐标传递工作。
Through the calculation of thermal stress values, it has been affirmed that free oscillation laser ignition of the explosive is heating ignition. 本文用一维激光热熔条件计算了与时间效应有关及无关的热应力值,从理论上证明自由振荡激光引爆机理是热起爆;
Preliminary study on free oscillation laser ignition of explosives 自由振荡激光引爆机理的初步研究
Free oscillation in numerical prediction model for tropical limited areas 热带有限区数值预报模式中的自由振荡
The non-isochronism of free oscillation of the simple pendulum discussed the important difference between the periodic solution to nonlinear forced oscillation and the stable solution to linear forced oscillation is also discussed. 理论上采用近似法求解,并用数学软件作图,分析和讨论了单摆自由振动的非等时性以及非线性受迫振动周期解与线性受迫振动稳态解的重要差别。
A Method for Solving the Strongly Nonlinear Free Oscillation Problems 强非线性自由振动问题的一种解法
A Graphical Analysis of the Almost Sinusoidal Transient Free Oscillation in a Nonlinear Automatic control System by the Method of Logarithmic Characteristics 非线性自动调整系统近于正弦自振荡过渡过程的对数分析法
When the UJT biased in critical state is submited to an alternative magnetic field, the frequency of which is close to a frequency of the UJT oscillator, the amplitude of the UJT free oscillation is strongly amplified. 由临界偏置下单结晶体管(UJT)组成的自激振荡器置于一交变磁场中时,如果两者的频率接近,则振荡器输出脉冲的幅度将急剧增加。
Our result is almost consistent with frequency of the modes of preliminary reference earth model ( PREM). The inconsistent modes of spheroidal and toroidal free oscillation may result from lateral heterogeneous or/ and anisotropic media of the earth. 频率与PREM模型略微不一致的球型或环型振荡可以解释为地球介质的横向不均匀性和各向异性所致。
Using a controllable voltage source to realize a free oscillation of LC circuit 用可控电压源实现LC电路的自由振荡
This report involves our research works in the fields of coseismic earthquake stress triggering, fault activities, free oscillation of the earth, precursory changes prior to earthquakes and earthquake forecast. 本研究报告涉及同震应力触发地震、断层活动、地球自由振荡、地震前兆和地震预报等多方面,但是钻孔应力-应变观测是贯穿其中的主线。
The free oscillation theory, response spectrum analysis theory and time-history analysis theory is introduced in this thesis. The dynamic characteristic and the antiseismic ability of railway long span deck-type reinforced concrete arch bridge are studied in this thesis. 本文介绍了自振特性分析理论、反应谱分析理论和动态时程分析理论,对铁路大跨度上承式钢筋混凝土箱形拱桥进行了动力特性分析以及抗震分析。