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tripartite array
相关语句
  三点阵
     A tripartite array for infrasonic measurement in Changping county, Beijing was arranged,using three CSH-1 infrasonic receivers. The infrasonic signals(P-t curve and wave vector) produced by the meteor shower from Leo on November 17,1998 were observed.
     采用三台CSH-1型次声接收器,在北京昌平区布置了一个次声测量三点阵,并观测到1998年11月17日狮子座流星雨产生的次声波P-t曲线和波速波向图。
短句来源
     A tripartite array of infrasonic measurement in Changping county of Beijing was arranged using three CSH\|1 infrasonic receivers. The infrasonic signals (P t curve and wave vector) produced by meteor shower from Leo on November 17 in 1998 were observed.
     采用三台CSH 1型次声接收器 ,在北京昌平县布置了一个次声测量三点阵 ,观测到 1998年 11月 17日狮子座流星雨产生的次声波P t曲线和波速波向图。
短句来源
     A tripartite array in Changping, Beijing was arranged. The infrasonic signals (P-t curve, velocity and direction of wave) resulted from the earthquake on 26 September 2003 in Japan were observed.
     利用在北京昌平安装的次声三点阵,记录了2003年9月26日日本北海道地震的前兆次声波和震后次声波。
短句来源
     Our five-years measurement of the precursory infrasonic waves from strong earthquake using a tripartite array setup in Changping, Beijing shows that, 10 days or so before occurrence of a strong earthquake, a precursory infrasound with strong amplitude can often be observed.
     利用在北京昌平安装的次声三点阵,对强地震前兆次声波进行了5年的连续观测。 统计分析结果表明:强震前约10天内常能测到振幅很强的前兆次声。
短句来源
  相似匹配句对
     On the Norm of Array
     关于立体阵的范数
短句来源
     The Mierolen Array
     微透镜阵列
短句来源
     On the Tripartite Fraud
     论三角诈骗
短句来源
     The Tripartite Framework and Conceptual Semantics
     平行式框架下的认知语义研究
短句来源
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  tripartite array
These results suggest that a high level of precision could be provided by a tripartite array of calibration shots in cases where models are poorly known.
      
From the Uppsala tripartite array,dT/dΔ and azimuth are determined for 181P and 24PKP phases.
      


In this paper,the phase velocities of Love waves were determined by using the seis-mograms from fifteen stations in China and three earthquakes from Kamchatka and two from Alaska were under use.Correlations between the phases were in evidence in analyzing the variation of periods with distances and also arrival times of the crests of Love waves in the seismograms.The phase velocities of Love waves were calculated by means of a tripartite array,the velocities of Love waves with periods ranging from 15 to...

In this paper,the phase velocities of Love waves were determined by using the seis-mograms from fifteen stations in China and three earthquakes from Kamchatka and two from Alaska were under use.Correlations between the phases were in evidence in analyzing the variation of periods with distances and also arrival times of the crests of Love waves in the seismograms.The phase velocities of Love waves were calculated by means of a tripartite array,the velocities of Love waves with periods ranging from 15 to 40 seconds being determind.The thickness of earth crust in different regions were calculated by using Dorman case 208.

本文利用三个堪察加地震和两个阿拉斯加地震在我国某些地震台上所记录的乐夫波,进行了相位对比,用最小二乘法分别计算了各地区的乐夫波相速度。将观察的相速度与理论曲线相比较,得到各地区的地壳厚度。 理论曲线系根据多尔曼(Dorman)208模型的数据,采用β_1=3.53公里/秒,ρ_1=2.78克/厘米~3。

A tripartite array of infrasonic measurement was arranged at Changping county in Beijing by using three infrasonic receivers. The infrasonic signals stimulated by six strong earthquakes from January to March in 1999 were observed. With fast Fourier transformation, the waveforms of acoustic pressure versus time curve were analyzed, and the corresponding three\|dimensional dynamic frequency spectra were obtained. The results of the spectrum analyses show that the amplitudes of precursory infrasonic waves...

A tripartite array of infrasonic measurement was arranged at Changping county in Beijing by using three infrasonic receivers. The infrasonic signals stimulated by six strong earthquakes from January to March in 1999 were observed. With fast Fourier transformation, the waveforms of acoustic pressure versus time curve were analyzed, and the corresponding three\|dimensional dynamic frequency spectra were obtained. The results of the spectrum analyses show that the amplitudes of precursory infrasonic waves vary from weak (10~20 Pa) to strong (40~80 Pa) or even stronger. Their periods are in the ranges of 2~19 minutes and 20~65 minutes respectively at first, and then become continuous in 2~65 minutes. The maximal amplitude of the precursory infrasound is related to the magnitude of earthquake and the distance and depth of the epicenter. The generating and propagating mechanism of the precursory infrasound of earthquake are primarily explained. If the directions of two tripartite arrays intersect, the location of epicenter will be predicted. So the measurements of the precursory infrasound could become a new and more effective method for the imminent prediction of earthquake.

在北京昌平安装次声三点阵 ,并测量到 1999年 1~ 3月 6次强地震的前兆次声波声压与时间的关系曲线及波速波向图 ,经过傅立叶变换得到其三维动态频谱。频谱分析结果表明 :①强地震前天左右常能测到振幅很强、方向可测的地震前兆次声波。其频谱特点是 ,振幅由弱渐强 ,周期先分散 ,后连成一片 ;②强地震前兆次声波三维动态频谱的最大振幅不仅与地震级别有关 ,而且与震源距离及深度都有关。初步解释了强震前兆次声波的产生机理和传播机制。研究指出 ,若两地的三点阵波向相交 ,可预测震中位置。地震前兆次声波的测量研究 ,有可能发展成为临震预报中一种较有效的新方法

A tripartite array for infrasonic measurement in Changping county, Beijing was arranged,using three CSH-1 infrasonic receivers. The infrasonic signals(P-t curve and wave vector) produced by the meteor shower from Leo on November 17,1998 were observed. With fast Fourier transform, the waveforms of P-t curve were analyzed and corresponding dynamic three-dimensional spectra were obtained. The analytic results show. (1)Infrasonic waves produced by meteor are mostly very short, lasting one to five minutes;...

A tripartite array for infrasonic measurement in Changping county, Beijing was arranged,using three CSH-1 infrasonic receivers. The infrasonic signals(P-t curve and wave vector) produced by the meteor shower from Leo on November 17,1998 were observed. With fast Fourier transform, the waveforms of P-t curve were analyzed and corresponding dynamic three-dimensional spectra were obtained. The analytic results show. (1)Infrasonic waves produced by meteor are mostly very short, lasting one to five minutes; (2)Periods of the infrasonic waves range mostly from 40 to 408 seconds with a few from 1 to 480 seconds; (3) During 7:21 p.m. to 8.41p.m. (Beijing time ) on Nov. 17,the infrasonic waves were much denser. After 8.41 p.m. waves became more and more sparse, the phenomenon conformed with observation with naked eyes, (4) Amplitudes of infrasonic waves from indordual meteors differ significantly from each other-weaker ones below 5-10 Pa, medium ones within 10-20 Pa, and stronger ones within 20-40 Pa(during 7.20 p.m. to 8.41 p.m. on Nov. 17 and around 1.06, 2:45, 3.59, 5.41, 6.11, 6:20 a.m. on Nov.18). Two of the strongest ones reach 75 Pa and 50 Pa around 7:31 p.m.,8.07 p.m. on Nov. 17. An explanation of the above results was given. This observation will provide a new method and useful scientific data for research in meteor astronomy.

采用三台CSH-1型次声接收器,在北京昌平区布置了一个次声测量三点阵,并观测到1998年11月17日狮子座流星雨产生的次声波P-t曲线和波速波向图。借助快速富立叶变换,分析P-t曲线的波形得到次声的三维动态谱。频谱分析结果表明:(1)各流星产生的次声波大都很短暂,持续时间在1-5分钟内;(2)流星次声波的周期大都在40-408秒内,少数在1-480秒内;(3)在11月17日19:21-20:41期间流星次声波仍很密集,20:41后它们才变得越来越稀疏,恰与肉眼观测相符合;(4)流星次声波的振幅彼此相差很大,较弱的在5-10Pa以下,中等的在10-20Pa之间,较强的在20-40Pa以内(如11月17日19:20-20:41以及11月18日1:06、2:45、3:59、5:41、6:11、6:20左右),最强的两个在11月17日19:31和20:07前后分别达到75Pa和50Pa。并对此结果给出了解释。本文为流星天文学研究提供一种新方法和有用的科学数据。

 
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