查询词典 mathematical

In the case of the location selection problem, mathematical programming has usually been untilized to determine the optimal location of facilities

在选址问题的情况下，数学规划通常也被untilized确定设施的最佳位置

This paper proposed a mathematical model of factor analysis, and analysis of some of his properties.

翻译一个东西：本文第一提出因子分析的数学模型，并且分析了他的一些性质。

Effects of the factors on the yield of CLA have been studied and the mathematical models have been established by using the 23 factorial experiment.

考察了反应温度、反应时间、溶剂用量、催化剂用量等因素对CLA产率的影响。

They were famed for their advanced mathematical knowledge and incredible understanding of the solar system.

他们因此掌握了先进的数学知识以及对太阳系的不可思议的了解而闻名于世。

In order to transfer the experimental JR curves from laboratory to real cracked components, a mathematical expression representing a family of the JR curves was constructed for steel 18G2A by using the test data of JR curves for the SENB specimens.

同时，为了将实验得到的18G2A钢的JR曲线应用于实际裂纹构件，建立了JR曲线与约束参数A2之间的关系，给出了与约束参数A2相关的JR曲线族的表达式。

An explicit mathematical representation of the exact boundary of a ball Bézier surface was given by recurring to the envelope theory of the family of bivariate surfaces in the classic differential geometry, as well as the spherical coordinates and the Cramer's rule.

根据经典微分几何中双参数曲面族的包络原理，运用球面参数坐标和Cramer法则，给出了球域Bézier曲面边界的精确数学显式表达式。

Mathematical information, Fan letter analysis, to study various aspects of help, is the basis of composition.

详细说明：数学资料，范函分析，对各方面的研究都有帮助，是编成的基础。

To build a model of this kind, a nonstationary random process mathematical model is set up through fast Fourier transformation and Herbert transformation based on available original records, and random samples are produced by numerical simulation.

该方法根据有限的原始风速记录，通过快速富氏变换和希尔伯特变换，建立了非平稳随机过程数学模型，然后以数字模拟的方法产生所需的随机样本。

We establish mathematical models of optimal operation schema, and to solve them by feasible direction method and linear approximation.

在管网布局的基础上，以管网投资净现值为目标，建立了管网结构参数优化模型，并充分考虑了输气量、管径、输气压力、管长、增压比、压缩机数目之间的关系，采用混合变量优化方法进行求解。

At first, a rigor mathematical definition of the problem is presented, then the analytical properties of the feasible region are studied, and the solution existence is examined.

文中建立了暂态稳定预防控制和优化问题的数学优化模型，考查了问题的可行域性质，并由此探讨了解的存在性。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。