查询词典 mathematical

Calculating the hologram is using a digital computer integrated coding, it does not need to hologram objects, but the actual existence of things on the mathematical description of wave after treatment, the digital computer input or output plotter controlled cathode rays tube shows the hologram is made.

计算全息图是利用数字计算机来综合编码的全息图，它不需要物体的实际存在，而是把物波的数学描述输入数字计算机处理后，控制绘图仪输出或阴极射线显像管显示而制成的全息图。

The working principle, mathematical model and the implement method based on digital signal processor were expatiated.

本文采用的锁相环技术是在数字信号处理器等通用可编程器件上实现的。

Based on dimensional analysis, a mathematical model for predicting the performance of the pumps working as turbines was put forward.

从量纲分析的角度出发，提出水泵反转运行的性能预测数学模型。

Generalized predictive control is a kind of advance control methods that is of strong robustness, can overcome the time delay of system effectively and is suitable to unstable non-minimum phase system. But it has the shortcoming of large computation load because of online solving the Diophantine equation, inverse matrix and recursion solution by Least squares. So four kinds of fast algorithms of GPC that don't need the mathematical model of plant and are highly real-time are proposed in the paper. They have laid the rationale for the application of GPC to systems that need fast response.

广义预测控制是一种鲁棒性强、能够有效地克服系统滞后、可应用于开环不稳定非最小相位系统的先进控制算法，但由于它需要Diophantine方程计算、矩阵求逆和最小二乘的递推求解，因此计算量很大，本文针对此缺陷提出四种不基于对象模型且实时性高的广义预测控制快速算法，为广义预测控制应用于实时性要求高的快速系统奠定了理论基础，具体研究工作如下。

The rich mathematical structure of the Dirac equation has attracted a lot of interest in recent years.

Dirac方程的丰富的数学结构已在近些年引起了广泛的兴趣，由此获得了很多令人惊异的结果应当纳入Dirac理论的体系。

This controller, which is independent of a mathematical model of an induction motor, can accomplish the discrete point-to-point regulation, which is direct and simple to limit the current error within a given tolerance.

这种负载均衡直接控制器不依赖于异步电动机的数学模型，控制效果不受异步电动机的参数影响，它的控制既直接又简化。

Earthworks zero line is determined by constructing the spatial gridding curved surface model of the original terrain and the field leveling design terrain by digital elevation mode. The DEM data of original terrain are obtained by actual measurement. The mathematical correlation is deducted to demonstrate the relationship between the coordinates of any point on spatial line and the direction cosine by the spatial linear equation. DEM data obtaining program is compiled by Fortran9.0 and it is applied automatically to obtain the DEM data of field leveling design terrain.

目的 利用数字高程模型(digital elevation model， DEM)构造原始地形和场平设计地形的空间网格曲面模型，确定土方工程中的零线方法通过实测提取原始地形DEM数据；依据空间直线方程，推导空间线段土任意点的坐标与方向余弦的数学关系式，采用Fortran90程序设计语言编写DEM数据提取程序，自动提取场平设计地形DEM数据；应用Surfers8.0和MapInfo软件构造规则的网格空间曲面模型并导出网格节，点数据；擦除场平设计范围外数据。

Master's thesis; students Jing Zhao was named "Top Ten army SBQP model "; students Xie Kang-min was the first National Youth Competition Gold Award century style television; students Dinghai Yuan, and should receive the second session of the national youth style TV contest" Best vitality of the Year "and" Outstanding Contribution Award "; students receive汤卉The first National Youth Science and Technology Innovation Award; 18 entries Wins National Undergraduate Mathematical Contest in Modeling and e-Design Competition first prize; In recent years, the National Competition in radio direction finder won 12 gold medals on behalf of the state in 2004 to the Czech Republic participated in the radio direction finder international championships, and achieved first place in the Asia-Pacific region.

戚文峰、张传定、范淑琴三位博士研究生的学位论文被评为全国优秀博士学位论文，8篇学位论文被评为军队优秀博士、硕士学位论文；学员赵菁被评为"全军十大学习成才标兵"；学员谢康敏获首届全国青年世纪风采电视大赛金奖；学员袁佳和应定海分别获得第二届全国青年时代风采电视大赛"最佳活力奖"和"突出贡献奖"；学员汤卉获得首届全国青少年科技创新奖；18个参赛队获全国大学生数学建模竞赛和电子设计大赛一等奖；近年来，在全国无线电测向大赛中获得12块金牌，2004年代表国家赴捷克参加了国际无线电测向锦标赛，取得亚太地区第一名。

In the present article, the nature analysed for Dirichlet function and Riemann function is discussed, the role of these functions in the mathematical analysis is demonstrated, and some applications of these functions are given.

本文讨论了狄利克雷函数、黎曼函数的分析性质。并展示了这些函数在数学分析中所起的作用。并且给出了这些函数的一些应用。

For multi-object contact problem in rolling engineering,the accuracy of disaggregation mathematical method is low.

在多物体同时接触轧制工程问题中，对各物体抽象出来研究存在简化较多、计算精度低等缺点。

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。