查询词典 mathematical model

After investigation about Senior high school students" Mathematical Communication by questionnaire, the penman detects that the status of Senior high school students" Mathematical Communication is not plumy and there are lots of problems.

通过对高中学生数学交流情况的问卷调查发现，目前国内高中学生数学交流的状况不容乐观，还存在很多问题。

In chapter 4, some vector mathematical definitions are first given to position tolerance zones; second, the principle of variation geometry is introduced, and the mathematical foundation of automatic generation of a approximate linear equation of tolerance design function by variation geometry is first proven; tangent method and two-point slope method based variation geometry are main studied.

第四章首先对一些位置公差带给出了矢量化的数学定义；然后介绍了变动几何的原理，首次论证了变动几何能产生近似线性公差设计函数的数学依据，并着重研究了基于变动几何的切线法和二点斜率法。

One target to study the network performance is to find out the mathematical expressions between each measure. Probability, Random Process and Queuing Theory are important and useful mathematical tools for network analysis.

求出反映定量指标间关系的数学表达式是研究网络性能的目标之一，而概率论、随机过程和排队论是进行网络性能分析的重要数学工具。

On one hand,as a typical content of mathematical subject,reasoning and proof embodies the mathematical rational spirit;on the other hand,to cultivate students' thinking ability as the main function,the mathematics without reasoning and proof.

一方面，推理与证明作为数学学科的典型内容，体现了数学的理性精神；另一方面，数学以培养学生的思维能力为主要功能，它离不开推理与证明。

After questionary,the circumstance of college students of science and engineering mastering the mathematical induction is obtained:many students knew how to use the mathematical induction,but they didn't know its logical basis and logical theory.

通过问卷调查，了解到理工科学生掌握数学归纳法的状况，绝大多数人会用数学归纳法，但他们不知道数学归纳法的逻辑基础和逻辑原理。

Transport system is a random nature, ambiguity and uncertainty of complex systems, the establishment of mathematical models very difficult and sometimes impossible to use existing mathematical methods described.

交通系统是一个具有随机性、模糊性和不确定性的复杂系统，建立数学模型非常困难，有时甚至无法用现有的数学方法加以描述。

Transport system is a random nature, ambiguity and uncertainty of complex systems, the establishment of mathematical models very difficult and sometimes impossble to use existing mathematical methods described.

交通系统是一个具有随机性、模糊性和不确定性的复杂系统，建立数学模型非常困难，有时甚至无法用现有的数学方法加以描述。

The algorithm utilizes the rotating transformation theory of vector, and derives a mathematical expression of trigonometric function which has the interval monotonicity. By comparing the values of mathematical expressions, the sizes of the angles can be judged, this avoids the troublesome calculations of angles, diminishes errors and raises efficiency.The prototype of 3D reconstruction system uses the DXF file as the data source.

文中的算法采用矢量的旋转变换理论，通过计算各分支路径与当前路径之间的三角函数值，利用变换后的三角函数表达式的区间单调性，将角度值的比较转换为三角函数表达式值的比较，从而避免了繁琐的角度值计算，减少了误差，提高了执行效率。

Amused student has maths good mathematical faith is the base that develops activity of be used to of mathematical dug sexology smoothly.

数学好玩学生具有良好的数学信念是顺利开展数学探究性学习活动的基础。

A sidelight here is that if you look at the mathematical representations of a PM signal versus an FM signal, the difference is that the modulation component in a PM signal is the mathematical derivative of the modulating signal in the FM signal.

如果你看调相PM信号和调频FM信号的数字表达式的对比，它们的不同点是调相PM信号调制向量是调频FM信号调制向量的数学派生。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。