查询词典 inversion theorem

The result shows that the mixed boundary condition can greatly reduce the calculation area without affecting accuracy of the solution.It is followed by the higher accuracy of Dirichlet boundary condition which makes the boundary error greater when measured points is near the boundary, so we must take a sufficiently large border region.The homogeneous boundary condition has relatively large error, but the use of non-triangle poles devices makes apparent resistivity calculation error become small, because of elimination of the effect on potential difference for the infinite boundary. In inversion, in order to save computing time, homogeneous boundary conditions are often used to perform finite element forward calculation.

结果表明，混合边界条件精度最高，可大大缩小求解区域而不影响计算精度，其次是Dirichlet边界条件精度较高，但测点越靠边界误差会越大，必须取足够大的边界区域，齐次边界条件的误差比较大，但如果采用非二极装置，通过电位差计算得到的视电阻率，由于无穷远边界对电位差的影响基本消除，视电阻率计算误差与混合边界条件下的接近，在反演中，为了节省计算时间，经常使用齐次边界条件进行有限元正演。

D seismic and logging data of the first mining area in the Xinyi coal mine are dealt with impedance inversion to predict aquosity and watertightness of the top Ordovician limestone and the possible water-rich areas in the aquifer are determined by the impedance values.

本文根据新驿煤矿首采区的三维地震和测井资料，利用波阻抗反演技术预测该区奥陶系灰岩顶部的含隔水性，并依据波阻抗值的大小圈定含水层中的可能富水区。

The result was satisfactory. Conclusion Nipple inversion can be effectively treated with triangular flaps of areola with superficial skin reserved.

保留乳晕表皮的三角瓣支撑法是矫治乳头内陷的一种较理想的手术方法。

A matrix of type, and it is the arithmetic, inversion, transpose function, it should be a good utility.

一个矩阵类的实现，有加减乘除、求逆、转置等功能，应该是一个不错的实用程序。

The finite field arithmetic is the base of cryptography and modular inversion is the kernel arithmetic operation.

有限域的运算是密码学的基础，而在有限域的所有运算中模逆运算是最核心也是最复杂的运算。

In the respect of data interpretation proceeding, the paper carried out the inversion calculation of experiment data with the resistivity CT method, gave some study on the image effect when the iron bodies were placed flatly close to water level under semi-space condition and were placed flatly, vertically or aslope to the water level under whole-space condition.

在资料解释处理方面，本文采用了电阻率CT法对实验数据进行反演计算，研究了半空间和全空间条件下铁块水平、垂直和倾斜放置时的成像效果，由效果图可以看出，通过电阻率CT法反演出的铁块的位置与水槽模拟实验中铁块的实际位置吻合的较好。

Keywords: asynchronous motor; transistor;computer control; SPWM inversion

关健词：异步变频电动机；变频器；SPWM逆变；绝缘栅双极性晶体管；微机控制。

Berg-violin concerto, wozzeckkey terms: atonality, 12 tone, tone row, retrograde, inversion, form

主要音乐概念：无调性，十二音体系，音序，倒叙性，倒置性，体裁的变改。

Berg-violin concerto, wozzeckkey terms: atonality, 12 tone, tone row, retrograde, inversion, fm

主要音乐概念：无调性，十二音体系，音序，倒叙性，倒置性，体裁的变改。

Based on the inversion results of different paths, the average crustal velocity model in central area of Yunnan province is also given in this paper.

根据不同路径的反演结果，给出了云南中部地区地壳内部的平均速度结构。

Yet, Edith says, there was always money in the bank.

但是Edith说，她的银行户口里面总是有钱。

We have created a series of files that resolve this problem--one for each day of the 40 days of purpose.

我们制作一系列的档案去解决这问题---一个为标竿40天中的每一天。