查询词典 mathematical

Generations of human reproduction is the metaphor, The game is mathematical mystery.

是人类世代繁衍的隐喻；也是数学奥秘的游戏呈现。

In this article, a mathematical model of enthalpy of formation for rare-earth hydride is established on the basis of the experimen...

本文应用微观结构参数法和大量的实验数据，建立了稀土贮氢合金氢化反应生成热的数学模型。

Firstly, this paper analyzes the forces acting on hydrobomb's body and empennage respectively. Then the mathematical model of hydrobomb's trajectory in seawater is discussed. Secondly, the simulation program is completed with Matlab.

分析了空投水雷水下无动力运动过程中雷体和尾翼的受力情况，并在运动受力分析的基础上给出了研究其水下散布的数学基础－水下无动力运动弹道仿真数模。

However, as different in mathematical problems, the study is not mature in mathematics about relativistic hydrodynamics.

然而，由于艰巨的数学上的困难，对相对论流体力学的数学研究仍不成熟。

This paper presents the utility, property and mathematical model of the program of network scheduling in hydroelectric engineering.

本文介绍了水利水电工程网络进度计划程序的功能、特点和数学模式。

By using the theories of conservation of momentum,conservation of energy and hydrokinetics,a mathematical model for describing the relationship among the fluid parameters,the formation parameters and the vibrant operation parameters was established.The analytic solutions of one-dimensional and radial transfusion equation for compressive and single-phase fluid flow through the compressive formation were obtained.The effects of each parameter on the vibrant operation were also gotten.On the basis of the above results,the computation models were established.

应用动量守恒、能量守恒、流体动力学等基本原理，建立了地层参数、流体参数和振动作业参数之间相互耦合的数学模型，求出了单相微可压缩流体在可压缩地层中的平面一维和平面径向渗流方程的解析解，得到了各项参数与振动作业效果之间的关系，为振动采油的数值模拟提供了初始压力分布表达式。

It demonstrates that trying to determine the probability of PMP/PMF is a misunderstanding of study on hydrometeorology from the following three aspects: a From pure mathematical concept point of view, the probability of PMP and PMF is all close to zero.

企图确定PMP/PMF的概率是水文气象研究的误区，从3个方面进行了论证：一是从纯数学概念上说，PMP和PMF的概率都应趋近于零。

Correct foundation of this type of mathematical model will add important content to time series analysis and has influences on artificial intelligence, medical diagnosis, failure check. hydrometeorology and earthquake prediction etc.

正确建立这种数学模型，将对时间序列分析添加重要内容，并对人工智能、医学诊断、故障检出、水文气象和地震预报等研究产生重要影响。

So a kind of two-grade dust catcher system with higher efficiency, convenience and mechatronic is studied. The designed dimension of the first- grade cyclone separator is optimized by using MATLAB optimization toolbox. New designed cyclone separator has lower resistance loss, higher efficiency, compact structure and less volume; The mathematical model of hydrometry is b...

在其一级旋风除尘器的尺寸设计中采用MATLAB的优化工具箱进行优化，经过试验证明，新设计的旋风除尘器为低阻高效除尘器，并且结构紧凑体积小；在二级文氏管除尘器中，根据其节流特性，结合流体力学原理，建立起流量检测的数学模型，据此引入与之配合的传感器和单片机系统，实现了流量的动态显示，为除尘设备机电仪一体化的研究奠定了基础。

The model has overlay and index method as the basic, mathematical model and statistical method embedded to form an integrated model. The HYDRUS model is performed to obtain the rating system, and principal component analysis and factor analysis are used to get the weighting system.

该模型以参数系统法为基础，将数学模型和统计方法嵌入该综合模型中，通过HYDRUS模型进行数值模拟来建立评价因子的评分体系，权重体系由主成分－因子分析法得到。

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。