查询词典 mathematical

The change of observation error was analyzed in the case of stator flux observer ui model at high speed and in model at low speed when the parameters of motor changed based on the mathematical model in the stationary coordinates.

利用静止坐标系下的异步电机数学模型，分析当电机参数改变时，高速运行状态下定子磁链观测器 u i 模型和低速运行状态下 i n 模型的观测误差变化情况，然后给出定子磁链全阶观测器增益矩阵的确定方法。

The mathematical models of the delay of the GPS signal in the circumstance are put forward respectively. The computation of orbital arc of the two satellite constellations is based on two body problem and perturbations models. An algorithm based on the IRI model and thin layer model is used to simulate the ionospheric delay of the GPS signal. The error models of observation, multipath, relativity and antenna phase center bias are also researched. Under the consideration of the autocorrelation of the electronical measurements, the autoregressive model of time series is introduced into the noise models.

在信号仿真中，研究了利用二体运动和摄动法计算LEO卫星至GPS卫星星座的几何距离的问题；在信号的误差模型中，研究了电离层时延的IRI2001模型和单层投影模型；讨论了观测误差、多径效应、相对论效应和天线相位中心偏移的误差模型；结合电子测量噪声的具有自相关特性的经验，研究了观测误差的AR模型；结合实测数据分析，讨论了接收机钟差和卫星钟差的误差建模问题。

Simulated mathematical models include several physics principles, e.g., distribution of stress-induced refractive index in the panda fiber of MRI, phase contrast, and image error of optical fiber around the observation plane of the objective lens.

仿真数学模型考虑了匹配型熊猫光纤的应力折射率分布、相衬成像原理、光纤在物镜观察面上的相衬成像偏差等物理图像。

M.C. Escher is a great modern Dutch printer, and his works are outstanding for their artistic combination of ration and imagination and of science and art, which is closely related to his study on mathematical methods, especially the principles of symmetry in geometry.

荷兰现代版画家M.C。埃舍尔的作品兼备理性与幻想、融合了科学与艺术的双重特性，这与他坚持不懈的对数学方法，特别是几何方法中对称原理的研究有着内在联系。

With this in view, a mathematical model is esta blished and the calculated results are presented.

它针对一个实际问题，建立了建井施工方案选择的数学模型，并介绍了计算结果。

Finally, on the basis of testing, the mathematical model is established.

最后，在试验的基础上，建立了凝缩的数学模型。

Based on serial images, a mathematical model of navigation parameter estimation is established by using IEKF.

建立了基于IEKF的序列图像估计导航参数的数学模型，并进行仿真。

Unicode has started to replace ASCII, ISO 8859 and EUC at all levels. It enables users to handle not only practically any script and language used on this planet, it also supports a comprehensive set of mathematical and technical symbols to simplify scientific information exchange.

Unicode是基于通用字符集的标准来发展的，包含了超过十万个字符（在2005年，Unicode的第十万个字符被采纳且认可成为标准之一）、一组可用以作为视觉参考的代码图表、一套编码方法与一组标准字符编码、一套包含了上标字、下标字等字符特性的列举等。

Let me illustrate this point by taking Euclid s elements of Geometry and Newton s Mathematical Principles of Natural Philosophy.

让我用欧几里德的《几何原本》和牛顿的《自然哲学的数学原理》为例来说明这一点。

Conventional flow mathematical models of coalbed methane are all based on Euclidean geometry.

传统的煤层气渗流数学模型均是建立在欧几里德几何基础上的。

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。