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域转换
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  domain transform
     For the first time, the author made use of time-energy density analysis based on wavelet transform and time-frequency domain transform techniques, and obtained the reasonable delay time interval by separating every sub-signal from measured millisecond blast vibration signal and comparing the superposition effect of sub-signal in different delay time interval.
     作者首次用基于小波分析的时能密度法以及时-频域转换技术,从实测微差爆破震动信号中分离出各分段震波,通过比较各分段震波在不同延期时间下的叠加效果,得到了微差爆破的较优微差延期时间。
短句来源
     By employing the spatial domain transform method, the regular ship noise interference in the common shotpoint domain can be converted into stochastic interference in the common deviation distance domain, and by using the popular technique for suppressing stochastic interference, the aim of suppressing ship noise interference can be attained.
     采用空间域转换的方法 ,将共炮点域中的规则船干扰 ,转换为共偏移距域内的随机干扰 ,用现今流行的随机干扰压制技术 ,就可以达到压制船干扰的目的。
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  “域转换”译为未确定词的双语例句
     This scheme was composed of two parts: intra prediction and inter prediction. For the intra prediction part,8×8 block DCT-HT transform-domain converse was used,and then intra mode decision was done in HT domain to obtain the optimum mode,so that good intra prediction was acquired.
     该方案中,帧内预测使用了8×8块的DCT-HT的变换域转换,然后在HT域进行Intra模式判决得出最优模式,从而得到理想的帧内预测;
短句来源
     in order to improve converted-wave DMO ,we advance a new P-SV wave DMOmethod in frequency wavenumber domain which is based on inclination decomposi-tion.
     为了提高转换波DMO的处理精度和效率,本文从倾角分解观点出发,给出一种频率波数域转换P-SV波的DMO方法。
短句来源
     It is more convenient,effective and accuratethan the existing converted-wave DMO methods in frequency-wavenumber domain.
     与现有的频率—波数域转换波DMO方法相比,具有简便、高效、精度高等特点。
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     An appropriate velocity model for depth-time conversion was constructed.
     通过建立合适的深时转换速度模型,将井间地震资料从深度域转换到时间域。
短句来源
     On the basis of the integral form of the P-SV wave DMO algorithm in F-K domain derived in the paper, the amphtude and pbase corrections are made, Compared with the conventional P-SV wave horizontal stacking, the method can obviously improve the stacking result and better solve the divergence problem of common converted points in CMP gathers.
     该方法依据文中导出的F-K域转换波DMO算法的积分形式进行振幅、相位校正,同常规转换波水平叠加相比能明显地改善叠加效果,更好地解决CMP道集内共转换点发散问题。
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  相似匹配句对
     DMO for P-SV and SV-P waves in f-k domain
     在f-k实现转换波(P-SV,SV-P)DMO
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     The Time-Domain Transformation of Chinese Speech Tone
     汉语语音的时声调转换方法
短句来源
     Transforming Bridge
     转换
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     John Domains
     John
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     Accomplishment of Natural Gas Conversion
     天然气转换的实施
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  domain transform
A frequency-domain transform used in the compression process of JPEG images, quantifying an image into a set of coefficients.
      
Embedding and detection is therefore preceded by a frequency domain transform.
      
In any frequency domain transform, the coefficients in different frequency bands have different magnitudes.
      
Timings show that for signals longer than 64 points, the speed gain of the frequency-domain transform is considerable.
      
This approach seems to be the most appropriate, as it isn't influenced by the time domain transform or system identification errors.
      
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By Fourier transform, scalar wave equation, can be transformed into single square root equation, which is a basic equation for post-stack migration. The radical expression in the equation may be approximated in different ways; consequently, there are different migration methods. The finite difference depth migration equation in space-frequency domain can be derived when the radical expression is approximated by continued fraction. In practice, this equation is solved by split- ting into two ones (called thin...

By Fourier transform, scalar wave equation, can be transformed into single square root equation, which is a basic equation for post-stack migration. The radical expression in the equation may be approximated in different ways; consequently, there are different migration methods. The finite difference depth migration equation in space-frequency domain can be derived when the radical expression is approximated by continued fraction. In practice, this equation is solved by split- ting into two ones (called thin lens and diffraction term equations), which are solved alternately. Crank-Nicolson scheme is used in secondorder difference so that both the high accuracy and the stability of wave field extrapolation can be ensured. Furthermore, "one sixth knack" of approximation is taken for higher accuracy. In summary, this migration process is composed of the following steps: first, by Fourier transform, a seismic section is transformed from time domain to frequency domain; then, for each frequency, the wave field is extrapolated from known depth Z to unknown depth Z+△Z by making use of the thin lens term equation and the diffraction term equation; finally, the component extrapolated results for all frequencies are summed up to form a resultant migration result at depth Z+△Z. summation process is also migration image process. Two theoretical models illustrated in the paper all bring good migration result.

从标量波动方程出发,利用傅里叶变换,可导出单均方根方程(single radical equation),它是叠后偏移的基础方程。此方程中的根式可采用不同的近似方法,因而有不同的偏移方法。采用连分式近似,可以得到空间频率域的有限差分深度偏移方程。在具体实现时应用分裂算法,即分裂成薄透镜项及绕射项,然后进行差分运算。对于二阶差分,采用了Crank-Nicolson差分格式,这不仅保证较高的计算精度,而且保证在波场外推过程中的稳定性。为了得到更高的计算精度,还采用了一种叫做1/6的近似技巧。上述的这种偏移方法过程可以归结为:首先对地震剖面作傅里叶变换,由时间域转换到频率域,然后对每一固定频率,利用薄透镜项和绕射项偏移方程进行外推,即把已知深度Z的波场外推到未知深度Z+ΔZ的波场,最后把Z+ΔZ处所有频率成分外推的结果累加求和,得到最终的偏移结果。累加的过程,即是偏移成像的过程。文中给出两个理论模型的例子,都能得到较好的偏移结果。

In this paper,the study of unilateral fin and bilateral fin with two- layer dielectric are done with the method of lines.By the analysis of the transforma- tion of electromagentic potential vector in the homogeneous region and in the dielec- lric interface and the multi-metallized strip boundary condition,the way calculating the dispersion characteristics of finIine structure with two-layer dielectric are obtain- ed.The results in this paper are very helpful to the design and manufacture of fin- line.The method...

In this paper,the study of unilateral fin and bilateral fin with two- layer dielectric are done with the method of lines.By the analysis of the transforma- tion of electromagentic potential vector in the homogeneous region and in the dielec- lric interface and the multi-metallized strip boundary condition,the way calculating the dispersion characteristics of finIine structure with two-layer dielectric are obtain- ed.The results in this paper are very helpful to the design and manufacture of fin- line.The method of analysis can be used in the multi-layer dielectric and multi-me- tallized strips structure.

本文用直线法分析了双层介质单侧与双侧鳍线。根据电磁势矢量在均匀域的转换及介质分层与多金属导带处的边界条件,得到了关于其色散特性的计算方法,并给出了相应的曲线。为鳍线的设计和制造提供了有力依据。本文的分析方法,也适用于研究任何多层介质多金属导带的平面波导结构。

Research on MCCAD includes formulation of printing color standards, a model transformation between screen reproduction and printing restoration, an expert color design system and etc. On the basis of chromatic theory, this paper depends on an experimental method to analyse the chromaticity data and range of a CMY printing color system and a RGB screen color system. This paper also sets up a new model whose range of usage and color conversion is wider than that of CRT, PAL and NTSC color models. The new model...

Research on MCCAD includes formulation of printing color standards, a model transformation between screen reproduction and printing restoration, an expert color design system and etc. On the basis of chromatic theory, this paper depends on an experimental method to analyse the chromaticity data and range of a CMY printing color system and a RGB screen color system. This paper also sets up a new model whose range of usage and color conversion is wider than that of CRT, PAL and NTSC color models. The new model solves the crucial techniques concerning screen reproduction of map printing color, establishes a data base of a map chromaatogram and introduces a CAD method of the color map. Technical means is provided for map color CAD, printing technology digization and standardization design.

MCCAD研究包括印刷色标的制定、屏幕再现与印刷复原的模型转换研究、专家设色系统等。本文在色度学理论基础上,通过实验方法,对CMY印刷颜色系统和RGB屏幕颜色系统的色度数据、色域范围进行了系统分析,导出了一个比现有CRT、PAL和NTSC颜色模型使用范围广、色域转换范围大的新模型。解决了地图印刷色标屏幕再现的关键技术,建立了地图色谱数据库,举例介绍了彩色地图的CAD方法。为地图色彩CAD、印刷工艺数据化、标准化设计提供了技术手段。

 
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