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low frequency wave
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  低频波浪
     In coastal zone, low frequency wave or surf beat has an important effecton sediment transport, harbor oscillations and ship motions.
     在海岸水域,海岸低频波浪对海岸泥沙输运、港口波浪和系泊船运动都有重要的作用。
短句来源
     The influence of the angle between the current and thewave and the initial conditions on the system and nonlinear behavior of platformunder low frequency wave load were discussed here.
     讨论了不同方向海流作用下平台系统的动力特性,以及低频波浪载荷作用下平台的非线性行为和初始条件对运动的影响。
短句来源
     The results indicate the natural period of ATP closes to the period of low frequency wave and the motion of slow drift at great amplitude is likely appear,and the nonlinear relation between equilibrium position of platform and the flow velocity and the influence of coulomb friction on equilibrium are revealed.
     计算表明铰接塔平台的固有周期接近低频波浪周期,可能发生大幅慢漂运动; 同时揭示了平台平衡位置与海流流速之间的关系,以及库仑摩擦对静平衡位置的影响。
短句来源
  低频波
     Numerical Study of Low Frequency Wave in Hall MHD Reconnection With Various Plasma β
     具有不同等离子体β值的Hall MHD重联中的低频波研究
短句来源
     Based on ECMWF objective analysis data, by using Batterworth bandpass-filtered skill and diagnostic analysis method,the interaction characteristics of low frequency wave and mean flow in mid-latitude during the winter years 1983/1984 and 1986/1987 have been studied in this paper. The main results point out the important role of the tropical convective activity on the above mentioned interaction process.
     利用ECMWF客观分析资料,使用Batterworth带通滤波技术,应用诊断分析的方法研究了1983/1984和1986/1987两年冬季中纬度地区低频波流间的相互作用特征,强调了热带地区对流活动的差异对于这种相互作用的重要影响。
短句来源
     (4)Experiments of rock fracture verified that strong low frequency wave could be received both on the surface of rocks and in the air before the main fracture.
     (4 )岩石破裂实验证实主破裂前在岩石表面和空气中均收到较强的低频波
短句来源
     As well, the dynamic mechanisms for two dimensional Rossby wave and low frequency wave energy propagation are explored.
     研究结果揭示了长江流域洪涝及其暴雨形成过程二维Rossby波列或低频波传播能量的动力机制。
短句来源
     it can be foundthat the difference of tropical convective intensities can bring about both the different intraseasonal teleconnection wave trains between the tropical and extratropical zones andthe different dispersions of low frequency wave energy.
     结果表明,热带对流强度上的差异可以造成热带内外地区季内遥相关波列以及低频波能频散上的差别。
短句来源
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  “low frequency wave”译为未确定词的双语例句
     A STRIP THEORY METHOD FOR CALCULATING LOW FREQUENCY WAVE DAMPING
     计算波浪飘移阻尼的一种切片理论方法
短句来源
     SEASONAL VARIATIONS OF LOW FREQUENCY WAVE OBSERVATIONS AT WUCHANG
     武昌低电离层LF观测的季节变化
短句来源
     An analytical method to calculate low frequency wave damping from strip theory is presented, based on use of calculating added wave resistance.
     本文利用Gerritsma波浪阻力增加公式,导出一种基于切片理论的波浪漂移阻尼的计算方法。
短句来源
     Long array data will present cannon offset and low frequency wave in high resolution processing, reduce the resolution of seismic section.
     在进行高分辨率地震资料处理时,长排列资料往往会出现大炮检距的波组低频化现象,使得地震剖面的分辨率降低。
短句来源
     The results show that the upper layer forced wave moves from the south to north with typhoon and the derived low frequency wave by the storm moves from the north to the south, which is little influenced by the interface wave and has the same character as forced wave of the barotropic sea.
     研究表明,上层强制波受内界面波的影响甚微,具有与正压海强制波同样特性,它导致了一个随台风移行的孤立波,同时派生一个逆向传播的陆架波系。
短句来源
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  low frequency wave
The external magnetic field, in the direction of ion-acoustic turbulence, is playing key role in transferring energy in upconversion process from resonant low frequency wave to the high frequency wave through modulated electric field.
      
Pit organs appear to have slightly lower rates of spontaneous discharge than neuromasts, however, and have slightly lower displacement thresholds to low frequency wave stimuli.
      
Low frequency wave of period 45 day loses maximum amount of energy when it interacted with frequencies of periods 92 day and 30 day.
      
The results of the modeling show that, in general, the high frequency wave bands disperse more than low frequency wave bands.
      
The possible generation mechanisms of these two low frequency wave signatures are discussed.
      
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On the basis of field seismic experiments conducted in Dongpu Depression, a scheme is presented of choosing optimum shot depth and perfect receiving system which are suited to this particular area. 1. The filtering character of ghost in surface layer must be takeninto consideration in choosing optimum shot depth. Field experiments in this region show that the frequency band of seismic wave narrows with the increase in shot depth, and that as shot depth increases, low frequency waves are enhanced...

On the basis of field seismic experiments conducted in Dongpu Depression, a scheme is presented of choosing optimum shot depth and perfect receiving system which are suited to this particular area. 1. The filtering character of ghost in surface layer must be takeninto consideration in choosing optimum shot depth. Field experiments in this region show that the frequency band of seismic wave narrows with the increase in shot depth, and that as shot depth increases, low frequency waves are enhanced while high frequency contents weakened. Therefore, the optimum shot depth is 11—20 meters. 2. The filtering charactcrs of earth and receiving system must be considered in the course of designing optimum receiving system. Experiments lead to the conclusion that SJ-1 geophone is good for 18 meter shot depth and GSE-201 seismic detector is suitable for the shot depth of 27 meters; and that in the case of shallow hole pattern shooting in the configuration of 4.5m×5, better result can be obtained with SJ-1 geophone.

本文通过东濮凹陷开展的地震野外工作方法试验,总结了一套适合该区的最佳激发、接收系统方案: 1.最佳激发深度的选择要考虑表层结构中虚反射的滤波特性。试验表明,在该区表层结构条件下,随着激发井深的加大,地震波的频谱变窄,低频成分突出,高频成分相对减弱,一般选在11~20米为宜。 2.最佳接收系统要考虑地层和接收系统的滤波特性。试验表明,在井深18米激发地震波,采用SJ-1型检波器为宜;在井深27米激发,采用GSE-201型检波器为宜:在采用4.5米×5的浅井组合条件下,也要使用SJ-1型检波器才能得到较好的效果。

In this paper, the electrostatic low-frequency parametric instability, excited by an external pump electric field E0 in an ion beam-plasma system, has been investigated by the method of Fried et al. First, the general dispersion relation for the low frequency wave is derived. Then the excitation of parametric instabilities in a proton beam-plasma system is studied by means of the numerical method. The results show that the ion beam has an important influence upon the parametric instability excitation in...

In this paper, the electrostatic low-frequency parametric instability, excited by an external pump electric field E0 in an ion beam-plasma system, has been investigated by the method of Fried et al. First, the general dispersion relation for the low frequency wave is derived. Then the excitation of parametric instabilities in a proton beam-plasma system is studied by means of the numerical method. The results show that the ion beam has an important influence upon the parametric instability excitation in plasma systems. In the absence of the ion beam, only one mode can be excited. Once an ion beam is introduced into the system, two waves with long wave length and low frequency are excited.

本文研究了外pump电场E_0在离子束-等离子体系统中所激发的静电低频参量不稳定性。导出了这种低频波的一般色散关系,并用数值方法分析了一维质子束-等离子体系统的参量不稳定性的激发过程。结果表明:离子束对等离子体中参量不稳定性的激发有极重要的影响。当没有离子束时,只能激发一种模式的波;一旦将离子束引入等离子体中,就可以在系统中激发两个波长较长的低频波。

The fundamental characteristics of forced waves in the stratified sea of the continental shelf during storms have been studied in this paper.The results show that the upper layer forced wave moves from the south to north with typhoon and the derived low frequency wave by the storm moves from the north to the south, which is little influenced by the interface wave and has the same character as forced wave of the barotropic sea.In the lower layer the forced interface wave is affected...

The fundamental characteristics of forced waves in the stratified sea of the continental shelf during storms have been studied in this paper.The results show that the upper layer forced wave moves from the south to north with typhoon and the derived low frequency wave by the storm moves from the north to the south, which is little influenced by the interface wave and has the same character as forced wave of the barotropic sea.In the lower layer the forced interface wave is affected by the upper layer forced wave, and varies with the variation of the depth of the thermocline. The sunken area of the ther-mocline in the typhoon region becomes a "ZERO WAVE AREA" which moves with typhoon and an inner shelf wave fropagating in the opposite direction exists. The lower layer wave height is larger than the upper one.

本文从理论上探讨了夏季南黄海和东海层化陆架区,在台风作用下强制界面波的基本特性。研究表明,上层强制波受内界面波的影响甚微,具有与正压海强制波同样特性,它导致了一个随台风移行的孤立波,同时派生一个逆向传播的陆架波系。在台风域内跃层下陷导致内界面波时空不连续,形成一个“零波域”随台风移行,但仍有一个内陆架波逆向传播。其振幅随跃层下层水深的增加而增大,下层水深随风速的增大而减小。上层波振幅小于下层内波振幅。

 
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