偏移法

词组短语

deflection method

与偏移法相关的网络例句 [注：此内容来源于网络，仅供参考]

In the first step,through using the formula of the conformal transformation,a continuous medium with regulation boundary in original area could be transformed to a homogeneous medium with anomalous boundary in complex area,so the new constant velocity field could be more adapt to the current Stolt migration's conditions.

首先，利用保角变换法可将不规则边界的单连通区域转变成规则边界的原理，将规则边界的连续介质场转变成不规则边界的均匀介质场，使该均匀介质场更适应现有Stolt等偏移方法对速度场的要求；其次，对改变了区域的模型地震记录进行常规的偏移成像处理；再利用推导出的反变换公式对成像结果进行反变换，得出模型的真实偏移成像结果。

For verifying the proposed approach, the EEG potential simulated from current dipoles in an ideal homogeneous medium are generated. The localization discrepancy and the moment orientation discrepancy are used as index for measuring the estimation accuracy.

为了验证这里所提出方法的正确性，脑波模拟讯号是由电偶极在理想的均匀介质头颅模型下所得到；定位偏移量及偶极矩方向偏移量两参数被用来当做估计值准确度的指标，另外，初始值估计法的偏移量分布可用数学中的珈玛方程式描述出分布的特性。

A series of theoretical and experimental studies on the microstrip patch antennas with dielectric superstrates is carried out systematically. Firstly, a comprehensive survey of the microstrip antenna technology and its theories are presented. Then, two analysis techniques, named as the spectral domain Green's function method and the spectral domain integral equation method are developed. The SDGF method is a simplified analysis technique, which takes advantage of the spectral domain immittance approach to find the dyadic Green's function for the stratified media, and obtains the complete closed-form formulas for radiation patterns, directivity, efficiency, gain etc. Some interesting calculated results are presented. The SDIE method is capable of determining resonant frequency, radiation characteristics, input impedance etc, for the covered microstrip patch antennas. Comparing with other full-wave analyses it reduced computation and mathematical labour remarkably. The singularities near the pole location of the surface-wave modes and the difficulty of the integral computation over infinite range of oscillating integrands are dealt with actively and documented well. Results predicted by the SDIE method agree extremely well with our experimental results for resonant frequencies of various superstrates. The superstrate effects on impedance and radiation characteristics also have been investigated experimentally so that the gap due to lack of measured data and computed results for multi-layered superstrate has been filled to some degrees and two useful observations have been achieved for weakening the resonant frequency shift and optimizing the microstrip antenna gain. As a meaningful application, the design and analysis of a 4×4 patch array are introduced.

实用微带天线普遍加介质覆盖层来防护热，物理损伤和环境影响，也可能在飞行或严酷气候条件下自然形成覆盖层本论文对带介质覆盖层的微带贴片天线系统地作了一系列理论和实验研究首先，对微带天线技术和理论作了全面的综述然后，发展了两种分析方法，称为谱域格林函数法和谱域积分方程法SDGF法是一种简化的分析技术，它利用谱域导抗法来求得分层媒质的并矢格林函数，并得出方向图、方向性系数、增益等参数的完整的闭式公式，给出了一些令人感兴趣的计算结果SDIE法能确定介质覆盖微带天线的谐振频率、辐射特性和输入阻抗等与其它全波分析方法相比，它明显减小了计算量和数学工作量已有效地处理了表面波模极点附近的奇异性和对振荡的被积函数的无限区间积分计算的困难对于不同覆盖层情况下的谐振频率，由SDIE法所预示的结果与我们的实验结果吻合得很好对于覆盖层对阻抗和辐射特性的影响也已作了实验研究这在某种程度上填补了缺少实验数据和计算结果之间的间隙，并得出了缓解谐振频率偏移和优化天线增益的两点有用的结论作为有意义的应用，介绍了一个4×4元矩形贴片天线阵的设计和分析。

The coherent inversion method and rootmeansquare velocity conversion method are jointly applied to build the interval velocity model. The tomographic imaging technique is used to optimize the geologic model. Based on the research of depth migration method and comparison of migration effects, the approaches and steps for building accurate migration velocity field are summarized, thus greatly improving the effects and efficiencies of velocity modeling and migration imaging.

采用相干反演法与均方根速度转换法联合建立层速度模型，利用层析成像技术优化地质模型，通过深度偏移方法研究和偏移效果的对比，总结了建立精确偏移速度场的方法和步骤，使速度建模和偏移成像在效果和效率上都得到了很大的改善。

In CRS gather method, we derived the quantitative relationship between optimal three parameter and migration velocity field, and then put forward ray-tracing method to get migration velocity field using optimal three parameter in CRS stack. The applications proved its effectiveness and adaptability.

在CRS道集偏移速度建模中，推导了优化三参数与偏移速度场之间的定量关系，提出了利用CRS叠加中的优化三参数求取偏移速度场的射线追踪法，模型试算表明了方法的有效性和适应性。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

An improved algorithm of hollowing STL model is presented which takes advantages of voxel method and offsetting method.

结合体素法无干涉性、偏移法计算量小的优点，提出一种改进的STL模型镂空算法。

According to the literature about the manufacture models of three kinds,radial feed- rolling cutter ,broach and Gleason cutter,the effect of centre point-centre line method,centre deviation method and oblique feed on qualified gear length were inspected.

根据滚刀、拉刀及格利森铣刀盘三类径向进给的制造模型相关文献，考察了中点中线法、中心偏移法、斜向进给对给出合格齿长的影响，指出了各类刀具的制造模型的异同，为这种研究提供了借鉴

objective to evaluate clinical effect of the handling protaper nickel-titanium rotary instruments in preparation of canals of posterior teeth.methods 96teeth with pulpitis or periapical periodontitis were instrumented by handling protaper rotary instruments using step-down technique,and by k files using step-back technique for control.all teeth were obturated with lateral condensation methods.the efficiency of preparation was analyzed with ra-diographs before and after operation.results no transportation,apical blockage and ledge were found in test.the technique could keep canals smooth.there were two ledge,one instrument fracture and nine transportation in control.the operative time was shorter and post treatment pain seldom occurred in handling protaper group.conclusion the handling protaper niti rotary instruments can prepare the canals effectively and safety.after the preparation,the canals could be easily washed,sterilized and filled.it is an efficient instrumentation method for posterior teeth's canals and be used widely.

目的 评价手用protaper预备后牙根管的临床效果。方法选取患有牙髓炎和根尖周炎的后牙96例，随机分成试验组和对照组各48例，试验组用手用protaper多锥度镍钛旋转器械逐步伸入法预备根管，对照组用k锉，逐步后退法预备根管，两组均用侧向加压充填法充填根管，根据治疗前后的x线片，评价后牙根管预备效果。结果试验组无根管偏移、根尖阻塞、台阶，且根管壁平滑流畅，无器械折断等并发症发生。对照组有2例台阶形成，器械折断1例，根管偏移9例。试验组操作时间短且术后疼痛轻微。结论应用手用protaper预备后牙根管快速、安全，成形效果好，易于根管冲洗消毒及填充，可视为临床上预备后牙根管的有效方法。

Magnetotelluric field finite difference migration tomography Found on the researches of Zhdanov etc. in MT finite difference migration tomography, we analyze and summarize both fruits and limitation of foregone peoples' achievements. So more precise finite difference extrapolation equation can be deduced, and it can be easily applied into the migration tomography. New equation reserved the derivative terms of wave number both at vertical and horizontal direction, so that more exquisite geoelectric diversification can still be accommodated, that is the very requirement of practical data interpolation.

大地电磁有限差分偏移成像技术：在Zhdanov等人建立的有限差分偏移成像研究的基础上，总结分析了前人在 MT成像技术方面的研究成果和存在问题；推导更精确的有限差分波场延拓方程，采用改进的有限差分法进行大地电磁场偏移成像，差分延拓方程保留波数对水平方向和垂直方向的一阶导数项而提高求解精度，可适应电性纵横方向变化剧烈的地电构造，使成像分辨率得到增强。

与偏移法相关的网络解释 [注：此内容来源于网络，仅供参考]

ADX：自动数据交换

SP元件公司的自动数据交换(ADX)技术,在不需特殊校正讯号或后期制作整理的条件下,会持续提供类比数位转换器在增益、偏移量与时间偏移错误的估算. 而这种演算法已经应用于修正静态与动态上不匹配错误的问题.

biased：偏颇

如此一来,比传另外, Landstrom 提出一种无偏颇( unbiased )的最大相 似性讯,然而其复杂度在相同的系统效能之下,却比有偏颇(biased)的最大相似性中,由於增加资料(data aided)的演算法需要大量的试验来解决频率偏移问题,

zero decrement：无衰减的

zero-crossing method 零相交法 | zero-decrement 无衰减的 | zero-deflection method 零偏移法

least maximum deviation：最小偏移极限值

least integer | 最小整数 | least iteration method | 最小迭代法 | least maximum deviation | 最小偏移极限值

reflection migrating：反射偏移

reflection method 反射 法 | reflection migrating 反射偏移 | reflection of polarization 偏振反射

minimum deviation method：最小偏移法

minimum (复minima) 最小值 | minimum deviation method 最小偏移法 | minimum diameter 最小直径

null method：零示法

null matrix 零矩阵 | null method 零示法 | null offset 零点偏移

urinometer：尿比重计

3.尿比重计(urinometer)法用特制的比重计测定4℃时,尿液与同体积纯水的重量(密度)之比. 4.超声波(ultrasound wave)法 利用声波在不同特性物质中传播速度与密度关系的性质,通过测定声波的偏移来计算比重.

offsetting：偏罝法

offset-lock 偏移锁定 | offsetting 偏罝法 | ohm 欧姆

cascade method for pouring ingot：瀑布式铸锭法

cascade hydroelectric station || 梯级水电站 | cascade method for pouring ingot || 瀑布式铸锭法 | cascade migration || 级联偏移