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最大相
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  “最大相”译为未确定词的双语例句
     . But there is nocut-off frequency in the formation where v_5>((1-p_1)/(p_2v_1))~(1/2) so the maximum phase ve-locity of the stonely wave is less than v_5.
     而在v_s>((1-p_1)/p_2v_1)~(1/2)的地层中无截止频率,其最大相速度小于v_s。
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     The test result is better than expectant guideline: The maximum of the phase error is 10°,the insertion loss is better than 10.74dB, the return loss is more than -14.88dB in the 33.9GHz~34.5GHz frequency band. The whole volume of the phase shifter is 80mm×35mm×20mm.
     最后,对加工出的毫米波四位数字移相器进行了测试,测试结果完全达到了预定指标要求:在所要求的33.9GHz~34.5GHz频带内,最大相移误差小于10°,插入损耗小于10.74dB,输入输出回波损耗大于-14.88dB,整个电路尺寸为80mm×35mm×20mm。
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     The calculated results show that the maximum phase shift is 360° when the length of the phase shifter is 50 cm, the inner radius 2.0 cm and outer radius 4.5 cm, and the loss is below 0.1 dB in the range of 3.9~4.1 GHz. The input and output of phase shifter are co-aligned on the same axis.
     结果表明:当相移器同轴波导内半径为2. 0cm,外半径为4. 5cm,相移器总长度为50cm时,可实现的最大相移量为360°,在3. 9~4. 1GHz频率范围内相移器的插入损耗低于0. 1dB。
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     If N is increased, the influence forphase-shifting error and other random factors to phase measuring resultwill be decreased.
     证明了相位测量误差与最大相移误差的平方成正比,与相移的步数N 成反比,增加相移的步数可以降低相移误差和其它随机因素对测量结果的影响。
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     The- 90% phase and 1/2 gain are produced for processing sinusioidal signals in the centre frequency f0. The maximum phase deviations and maximum gain deviations are respectively±0. 13° and± 0. 008 in the frequency bandwidth f0+10%.
     它能使正弦信号在中心频率f0处,产生-90°相移,增益为1/2。 在f0±10%范围内,最大相移偏差为±0.13°,增益最大偏差为±0.008。
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     Active filter based on adjusting maximum phase of deviation
     一种基于偏差大相校正的电力有源滤波器
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     The Most Frugal cf Men
     节约的人
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     THE MOST BEAU TIFUL COLOUR
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     This paper presents an available method-an active filter based on adjusting maximum phase of deviation.
     给出了一种基于偏差大相校正的电力有源滤波器的实现方法。
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The propagation of elastic wave in a cylindrical bore hole containing a fluid (for example, the muddy fluid is generally used) for acoustic logging is analyzed with a simplified model. Such a wave field may be looked upon as the superposition of partial waves which are classified according to different wave vectors along the axis of the hole. It is shown that, for the infinitely deep bore hole with single uniform rock layer outside it, the so-called "head wave" with maximum phase velocity v_(zm)=c_(2) exists...

The propagation of elastic wave in a cylindrical bore hole containing a fluid (for example, the muddy fluid is generally used) for acoustic logging is analyzed with a simplified model. Such a wave field may be looked upon as the superposition of partial waves which are classified according to different wave vectors along the axis of the hole. It is shown that, for the infinitely deep bore hole with single uniform rock layer outside it, the so-called "head wave" with maximum phase velocity v_(zm)=c_(2) exists only for characteristic frequencies as shown in formula (18), and partial waves with phase velocity v_(z) > c2 and c2 > vz > b2 are forbidden. Here, c_(2) and b_(2) are the longitudinal and transversal wave velocity in the rock layer outside the hole respectively. This result may be used to explain the so-called "filtering effect" of the hole as re-ported in Ref. (3). It is also shown that, for the hole with more than one rock layer outside it, a "head wave" which has similar properties described above is present only under certain conditions.

本文分析了简化模型下声波测井时裸眼井(内充流体一般是泥浆)中弹性波的传播,此波场可看成是轴向传播有不同波矢的分波的叠加。分析表明,对于井外只有单一均匀岩层且无限深的井,仅对如(18)式所示的特征频率成分才存在具有轴向传播最大相速度v_(zm)=c_2的所谓“首波”;而v_x>c_2及c_2>v_z>b_2的分波却不存在,此处c_2和b_2分别是井外岩层的纵波和横波速度。这正解释了文献[3]中所报道的裸眼井的“过滤效应”。分析还表明,对于井外具有多层岩层的井,只在一定条件下才存在与上述特性相近的“首波”。本文结果对声速测井显然是重要的。

Loran-C is a radio navigation system with high accuracy. The precision of standard L-C receiver will reach 0.1 μs. But, the velocity error which is occured from unnormal earth electrical parameter (conductivity, permitivity) on radio-wave propagating path will severely reduce the accuracy of locating. Now, automatic L-C navigator abroad, corrects that error with the differential mathod normally, but it must be aided by another high preisional locating system and manual operation, also that corrections only be...

Loran-C is a radio navigation system with high accuracy. The precision of standard L-C receiver will reach 0.1 μs. But, the velocity error which is occured from unnormal earth electrical parameter (conductivity, permitivity) on radio-wave propagating path will severely reduce the accuracy of locating. Now, automatic L-C navigator abroad, corrects that error with the differential mathod normally, but it must be aided by another high preisional locating system and manual operation, also that corrections only be suitable for a narrowscope, so the development of these mathod are limited. We report a mothod of phase velocity error correcting in this paper. The result of calculation by our program shows: the maximum velocity error of 9970-X pair will be+3.46 μs in the sea-area of the South of Japan; and proofed that the combined error of LOP with corrected is less than±0.76 μs (P=95%). This program may be used as subprogram in the coordinate converter of automatic L-C navigator, and it will provide a precisional correction for velocity (orfor T.D) automatically. Sea tests have confirmed that the error of L-C LOP correctcd by this mathod will decrease from 0'.7 to 0'.2.

劳兰C是一种高精度无线电导航系统,标准劳兰C接收机的精度可达0.1μs。但是,由无线电波传播路径上非正常的土地电参数(电导率、电介常数)产生的速度误差将会严重地降低定位的精度。目前,国外自动劳兰C导航仪通常采用差动法,对此项误差进行改正,但它必须借助于另一种高精度定位系统和人工操作,而且这种改正也仅适用于一个狭窄的范围,因而这些方法的发展受到了限制。我们在本文中阐述了一种相速误差改正方法。用我们所编程序计算结果表明:在日本南方海域9970—X台对的最大相速误差可达+3.46μs;同时论证了经过改正的位置线综合误差<0.76μs(p=95%)。该程序可用作自动劳兰C导航仪坐标变换器的子程序,它将对速度(或时差)自动进行精确改正。初步海试证明,劳兰C位置线误差经过此项改正,可由0.′减少到0.′2。

A numerical investigation of asymmetric modes of elastic wave propagation in a fluid-filled borehole is treated in this paper. The dispersion curves of guided waves (called flexural waves) and synthetic microseismograms are presented. The guided waves are found to be highly dispersive, with the phase velocities decreasing from the formation shear wave velocities in both hard and formations, They have much lower cut-off frequencies than the pseudo-Rayleigh waves in axisymmetric modes of propagation. We found...

A numerical investigation of asymmetric modes of elastic wave propagation in a fluid-filled borehole is treated in this paper. The dispersion curves of guided waves (called flexural waves) and synthetic microseismograms are presented. The guided waves are found to be highly dispersive, with the phase velocities decreasing from the formation shear wave velocities in both hard and formations, They have much lower cut-off frequencies than the pseudo-Rayleigh waves in axisymmetric modes of propagation. We found that under conditions of low frequency (2-3 kHz) and long source-receiver separation (3-4 m), the flexural wave is the prominent arrival in a microseismogram generated with an asymmetric source, traveling with a phase velocity equal to the formation shear wave velocity, while the compressional wave arrival before that is generally suppressed. The results of this study may be meaningful for designing a shear wave logging tool.

本文从数值上研究了裸眼井中弹性波传播的非对称模式,给出了合成微地震图和导波(弯曲波)的频散曲线,发现在“硬”地层和“软”地层的井中,导波都是高度频散的,其最大相速度等于地层的横波速度,其截止频率低于对称模式的伪瑞利波的截止频率;在低频(2—3kHz)和长源距(3—4m)的条件下,由非对称的声源(如声偶极子)所产生的微地震图中,初至信号是以横波速度传播的,而以纵波速度传播的信号被抑制。本文的结果对研制横波速度测井仪是有意义的。

 
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