查询词典 mathematical

The purpose of this study is to assess the impact of attention deficit and hyperactivity symptoms to mathematical achievement.

摘要 本研究旨在探讨注意力缺失、过动冲动症状对数学学业表现的影响。

In this paper, we use Extended Cabor Function of simple cells as the basic functional units to have successfully set up a mathematical model of neural network, with the properties of overlap-formed receptive fields and of comparative operation, explaining hyperacuity.

本文用简单细胞广义Gabor函数为基本功能单元，以Marr提出的计算理论为框架，建立了一个感受野重叠的，具有比较运算性质的、可解释超视锐度现象的神经网络数学模型。

The control strategy based on hyperbolic function is proposed and relative mathematical model is built.

为此讨论了车辆变速行为的一般规律，提出基于双曲函数的车辆变速控制策略，建立了相应的数学模型，并针对实例进行了具体分析。

A new hyperbolic function s method for finding exact solutions of nonlinear partial differential equations;2. The control strategy based on hyperbolic function is proposed and relative mathematical model is built.

为此讨论了车辆变速行为的一般规律，提出基于双曲函数的车辆变速控制策略，建立了相应的数学模型，并针对实例进行了具体分析。

You can stitch all sorts of mathematical theorems onto these surfaces. The discovery of hyperbolic space ushered in the field of mathematics that is called non-Euclidean geometry.

在这表面上，你可以编织所有种类的数学定理；这双曲空间的发现开创了数学领域，就是所谓的非欧几里德几何；这实际上属於数学领域中广义相对论的基础。

Mathematical model for hyperboloid grinding of twist drill and relationships between drill design and grinding parameters are introduced.

介绍了以回转双曲面作为麻花钻后刀面的数学模型，设计参数与刃磨参数的关系。

The powerful function of a new computer language MATLAB, produced by the America Mathworks company, is the mathematical software system for the calculation in science engineering. It can efficiently solve problems in science and engineering such as numerical linear hypercomplex system, digital approximation, optimization, numerical quadrature etc. It also has characters of beautiful interface and convenience for users.

MATLAB是Mathworks公司推出的适用於科学和工程计算的数学软件系统，可高效地解决数值线性代数、微分方程数值解、数值逼近、最优化、数值积分等科学和工程问题，且具有可视化图形处理、使用方便、开放式多功能於一体的新一代计算机语言。

This program is developed based on the platform of Delphi 7.0,and its mathematical model is hypergeometric distribution.

该程序在Delphi7.0开发平台下编写，数学模型为超几何分布，采用试凑法逐次逼近。

The Teukolsky equation is transformed to Heun eqution by variable substitution, and the Heun eqution is a known mathematical function, its solutions is in the form of series of hypergeometric functions.

Hisao Suzuk等通过一系列参量变换转化Teukolsky方程为Heun方程，而Heun方程是已知的数理方程，其解的形式是超几何函数级数。

The benefit of this method is its mathematical simplicity and its consequent ease in programming. Secondly, it brings out a new 3D interpolation method—hypersurface spline method, this method extends the surface spline method of 2D interpolation into 3D space.

其次，提出了一种基于超曲面样条函数进行三维空间插值的新的三维空间插值方法，该方法将二维的曲面样条函数插值法进一步拓展到三维空间。

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。