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模型道
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  model trace
     THE RESIDUAL STATIC CORRECTION OF AUTOSTATISTICS——A Method of Model Trace Formed by Multichannel Lineup Stacking
     自动统计剩余静校正——多道同相叠加形成模型道的方法
短句来源
     In charter 2,at first it is introduced the short-wavelength statics of converted wave difference with P-wave, and then introduced principle of convertion wave and the difference between statics pointing the difference and explained model trace forming ,getting moveout, that is getting total statics ,structural terms and receiver statics .
     第二章首先说明了转换波短波长静校正与纵波静校正的不同,针对这种差异介绍了转换波静校正的原理,对模型道的形成和时差的求取作了说明,即总静校正的求取和地层起伏的时间延迟以及接收点静校正的获得。
短句来源
     Therefore,it is possible to use the maximum correlation value between model trace and Common-Receiver-Point(CRP) gathers for realizing maximum stack power and further to pick the statics of CRP relative to maximum values.
     因而 ,可以在共接收点 (CRP)叠加剖面上 ,使模型道与 CRP叠加道的相关值达到最大来实现叠加能量最大 ,进而拾取最大相关值所对应的 CRP点的静校正量。
短句来源
     ② Making recording trace to model trace smaller offset distance/depth, with delay quantity is residual truncation error to correction which cross-correlation coefficient is most between the seismic trace and model trace.
     ②利用偏移距与深度之比较小的记录道生成模型道,以求取 的地震道与模型道之间互相关系数最大时的延迟量为剩余截断误差,进行校正。
短句来源
     The principle of LIFT is to get the signal model trace and eliminate it from the original data so as to separate noise from the data.
     LIFT(linear interference filter tech- nique)去噪方法的原理是:首先从原始数据中求取信号模型道,并从原始数据中将其减掉,将噪声数据分离出来;
短句来源
  “模型道”译为未确定词的双语例句
     But when theS/N ratio of reflection wave is low on stacked section, the reflection residual staticcorrections are invalid because we can't build a right piloted trace.
     而当反射波的信噪比过低时,常规的剩余静校正方法由于不能建立准确的模型道而失效。
短句来源
     Aiming at the actual state of seismic profile being seriously affected by the superficial factors in mountainous regions, the model traces composed by stacking with multiple side-by-side CDP gatherings have been adapted.
     山区表层因素严重影响地震剖面的质量,我们采用了多个相邻的CDP道集同相叠加组成模型道,当道数足够多时,模型道在整个测线上趋于稳定,它的时间位置就是静校正零基准线的位置.
短句来源
     This paper deals with three-component isolation,noise immunity of three-component demodulator,converted wave surplus correction,fissure recognition,and detecting gas-bearing bed using longitudinal-transverse wave velocity ratios.
     利用纵波和转换波剖面计算纵横波速度比 ,用转换后的纵波作模型道做转换波的剩余静校正 ; 根据波在裂缝性介质中其振幅、速度、偏振存在的方位差异特性识别裂缝 ;
短句来源
     Finally, the signal model traces and the residual data are reconstructed, showing that the LIFT method can not only improve the S/N ratio but also preserve the effective signal of the original data to a great extent.
     最后将剩余数据与信号模型道进行数据重构。 对重构数据的分析表明,LIFT去噪方法不仅可以提高地震数据的信噪比,还可以最大限度地保存原始数据中的有效信号。
短句来源
  相似匹配句对
     E model of CRM.
     E模型
短句来源
     Obviously, EVA model turns out a scientific appraisals to motivate the managers.
     该模型为:
短句来源
     A Simple Economic Model of Gas-Transfer Pipelines
     输气管的简单经济模型
短句来源
     The ballistic simulation model is established for a rocket.
     建立了火箭弹仿真模型
短句来源
     On Yi(One)
     “一”
短句来源
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  model trace
Experiments at 25 kbar and 1000°C, on a model trace element-enriched carbonatite-eridotite mix, produced augite + pargasite ± garnet ± dolomite coexisting with a carbonatite melt.
      
After computing fixation centroids, we now generate a model trace by mapping the centroid sequence onto the predictions of the model.
      
Each model trace was multiplied by a common factor that made the amplitude of the model current at 90 mV equal to that of the data.
      
Experimental recordings were scaled using Cm 100 pF to match peak amplitude of model trace at 20 mV.
      
Finally, given this tracer model, we can produce a model trace for a given protocol.
      
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  model track
Interest rates from the model track US rates closely for the period 1953-1991.
      


Aiming at the actual state of seismic profile being seriously affected by the superficial factors in mountainous regions, the model traces composed by stacking with multiple side-by-side CDP gatherings have been adapted. The model traces having met our needs would tend to be a steady state in the line. In this case the time position simply represents that of zero reference line of static correction. The residual static correction either inside or amidst the gatherings could be completed simultaneously, if only...

Aiming at the actual state of seismic profile being seriously affected by the superficial factors in mountainous regions, the model traces composed by stacking with multiple side-by-side CDP gatherings have been adapted. The model traces having met our needs would tend to be a steady state in the line. In this case the time position simply represents that of zero reference line of static correction. The residual static correction either inside or amidst the gatherings could be completed simultaneously, if only the traces of the CDP gatherings are pointed to each model trace correspondingly. As a result the signal-to-noiseratio in the sections is then improved, the king amplitude is increased, so as to make shallow, middle and deep reflectors smooth as well as stac continous, the shape of structures become distinct…etc., strictly speaking, it seems to be much superior as compared with the autostatic correction method conducted by imported digital computers 170-4 and 172-4.

山区表层因素严重影响地震剖面的质量,我们采用了多个相邻的CDP道集同相叠加组成模型道,当道数足够多时,模型道在整个测线上趋于稳定,它的时间位置就是静校正零基准线的位置.只要将CDP道集内各道向对应的模型道对齐,就可以同时完成道集内和道集间的剩余静校正.本方法可提高剖面的信噪比,增强叠加能量,使浅中深反射层光滑连续,构造形态清晰……,它比引进的1704和1724机的自动剩余静校正方法更加完善.本方法程序简单,占用内存量小,处理速度快,适用于小型计算机.方法的适应性广泛,无论是弯、直测线;单、多次覆盖剖面都可应用.本方法也可作为修饰性程序应用于地震勘探的数字处理中.

The mechanism for formation to filter some seismic waves is essentially attributed to absorption of formation. The absorption effect makes frequency and amplitude decrease with the increase of seismic wave propagation distance, and causes the seismic phases lagged in some degree. A anti-absorption operator must be designed so as to eliminate the absorption effect. The anti-absorption operator is obtained in the following way: (1)CD by'Hilbert transform, the phase spectrum φ_Q(f) of absorption operator q(t) is...

The mechanism for formation to filter some seismic waves is essentially attributed to absorption of formation. The absorption effect makes frequency and amplitude decrease with the increase of seismic wave propagation distance, and causes the seismic phases lagged in some degree. A anti-absorption operator must be designed so as to eliminate the absorption effect. The anti-absorption operator is obtained in the following way: (1)CD by'Hilbert transform, the phase spectrum φ_Q(f) of absorption operator q(t) is derived from its amplitude spectrum |Q(f)| on the assumption that q(t) is a minimum phase one; (2) the phase spectrum φ_(IQ)(f) of anti-absorption operator is obtained by putting an opposite sign on φ_Q(f); (3)φ_(IQ)(f)integrated with reciprocal |Q(f)| (the amplitude spectrum of absorption operator) brings the frequency spectrum of antiabsorption operator. This anti-absorption operator is used in filtering of seismic data to eliminate the absorption of formation. In practice, the points for attention are as follows. (1) on an input section, the seismic traces which have higher S/N ratio and better reflection bands are used as model traces; (2) reasonable windows overlapping to a certain degree are taken on model traces; (3) after getting the final output, overlapping interpolations must be made to joint data in adjacent windows. Anti-absorption technique can bring satisfactory results.

地层对地震波的滤波作用,主要表现为地层的吸收效应,这种吸收效应使得地震波的频率和振幅随着传播距离的增加而变低和减小,各反射层的相位也有不同程度地滞后。为了消除地层的吸收作用,必需设法求得反地层吸收因子。因此,假定地层的吸收因子q(t)是最小相位的,这样就可利用希尔伯特变换由吸收因子的振幅谱|Q(f)|确定q(t)的相位谱φ_Q(f),然后将φ_Q(f)反号,求得反吸收因子的相位谱φ_(IQ)(f),再将φ_(IQ)(f)乘以吸收因子振幅谱|Q(f)|的倒数,得到反地层吸收因子的频谱。最后用此反吸收因子对实际地震记录进行滤波,即可消除地层吸收效应的影响。在具体实现过程中要具体注意两个环节:其一,要在输入剖面上选取信噪比高,波组齐全、波组特征明显的若干道作为模型道;其二,对每个记录道要合理地划分时窗,相邻时窗要有一段重叠,在求得最终输出之后,又要采用交叉插值方法将重叠处数据很好地拼接起来。采用这种反地层滤波技术所得到的实际效果是令人满意的。

Empert model,C-D model,and trend yield model were set in order to quantitatively analysing the contribution and role of scientific and technological factors and natural factors to the land productivity of rape during the 1955-1988 in Shanghai County.The result showed that t,he trend yield of 1978 reached the peak of curve.The trend yield of 1978 was 72.9 kg/mu more than that of 1955.The increasing rate was about 132%.In the total rate,the contribution of variety change,cultural improvement,the application of...

Empert model,C-D model,and trend yield model were set in order to quantitatively analysing the contribution and role of scientific and technological factors and natural factors to the land productivity of rape during the 1955-1988 in Shanghai County.The result showed that t,he trend yield of 1978 reached the peak of curve.The trend yield of 1978 was 72.9 kg/mu more than that of 1955.The increasing rate was about 132%.In the total rate,the contribution of variety change,cultural improvement,the application of fertilizer,and soil productivity was 54%,36%,15%,and 27% respectively.However,the trend yield of 1988 was 24.3kg/mu less than that of 1978 and the decreasing rate was 19%.The contribution of four factors was 1.6%,-6.4%,-7.2% and-7.0% respectively.Among the local climate factors,the most important affection to the rape yield was made by 7 factors,the extent of comprehensive index of meteorological factors was 40-60%.The average increasing rate of bumper harvest year was 27.2%.The average decreasing rate of disaster years was 22.6%.The serious disaster affecting the rape yield owing to pests and diseases happened about once 3 years and made loss about 5.7% each year during the past 34 years.In some most strious years,the loss index could be up to 30%.

为了定量分析诸科技因子与自然因子对上海县1955—1988年油菜生产力发展变化的贡献和作用,建立了油菜生产力的专家模型、道格拉斯模型和趋势产量模型。研究结果表明,趋势产量于1978年达峰值。1978年比1955年每亩趋势产量提高72.9公斤,增产132%。其中,品种更换、栽培技术改进、施肥水平与地力变化和三因子综合作用对产量增长的贡献分别占54%、36%、15%和27%。1988年比1978趋势产量下降24.3公斤,减产19%。四者对产量变化的作用分别为1.6%、-6.4%、-7.2%和-7.0%。筛选出对当地脉动产量构成较大影响的7项气候指标,其综合丰歉指数的变幅达40%—-60%,丰年平均增产率为27.2%,歉年平均减产率为22.6%。对脉动产量产生较大影响的病虫危害年,大体上三年一遇,平均减产指数为5.7%,个别严重危害年的减产指数可达30%。

 
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