查询词典 numerical system

The system com- bines numerical simulation with physical simulation to solve the difficult problems of autopilot in closed-loop work on land and dynamic simulation of the course ,rudder angle the track.

介绍一种新颖的自动舵陆上仿真系统的设计方案、功能、特点及软件的设计特点，该系统采用数字模拟与物理模拟相结合的方法，解决了自动舵的陆上闭环工作及航向、舵角、航迹的动态仿真难题。

According to the effects of nonlinear potentials on symmetries and their strength distributions, one is able to predict the existing discrete breathers in a given system, which is real helpful to theoretical analysis and numerical calculation.

根据各非线性势能系数对解的对称性的影响以及不同大小的非线性势能函数对解的影响强度的分布，可以对特定系统中可能存在的离散呼吸子解进行预测。

In order to improve demisting efficiency of mist eliminator in terms of different droplet diameter and reduce blockage of gas gas heater in desulfurization system, numerical simulation and experimental study were carried out on the mist eliminator in bubble desulfurizer.

为提高除雾器对不同粒径小液滴的脱除效果，减轻脱硫系统气气换热器的堵塞程度，对鼓泡脱硫塔除雾器性能进行了数值分析和实验研究。

Keywords Gas-solid two-phase flow;Pneumatic conveying;High temperature pipe expansion system;Numerical simulation;Structural optimization

气固两相流；气力输送；高温管式膨胀系统；数值模拟；结构优化

Online tuning and relatively light calculation burden due to directly coefficient setting by formula extend this scheme to be used for fast-running process and mechanical equipment, numerical simulation over a wide range of system parameter variation shows that the recommended scheme is superior to both traditional PDF designed by Phelans approach and relay feedback auto-tuning PID in terms of performance behavior.

本文通过基于继电反馈的自整定PDF控制和基于Phelan法的PDF控制及基于继电反馈的自整定PID控制的比较研究，表明所提出的控制方法具有良好的控制效果。

Online tuning and relatively light calculation burden due to directly coefficient setting by formula extend this scheme to be used for fast-running process and mechanical equipment, numerical simulation over a wide range of system parameter variation shows that the recommended scheme is superior to both traditional PDF designed by Phelan's approach and relay feedback auto-tuning PID in terms of performance behavior .

大量的数值仿真试验表明，该自整定PDF控制方法具有良好的控制效果和在线调节性能，具有设计公式简单、相对计算量小的特点，能够应用于快速变化的过程和机械设备中。本文通过基于继电反馈的自整定PDF控制和基于Phelan法的PDF控制及基于继电反馈的自整定PID控制的比较研究，表明所提出的控制方法具有良好的控制效果。

A physical model for numerical simulation and calculation of cross horizontal-tube falling film evaporator used in air-conditioning and refrigeration system was presented.

0前言早在1848年，水平管降膜式蒸发器技术就已经诞生，但是直到20世纪90年代，随着氟氯烃即CFC的逐步淘汰，才开始在制冷系统上被采用。

Falling film evaporator; numerical simulation; refrigeration system; tube arrangement; vapor passage

降膜式蒸发器；数值模拟；制冷系统；布管方式；气流通道

Aiming at the key technology of numerical control, taking NC gear shaper as research object, some issues are studied in this paper.1 NC gear shaper YK5120 was developed.1 Three dimensional model of NC gear shaper is built, kinematics simulation and interference checking of NC gear shaper are carried out.2 Based on kinematic theory of multi-body system, the precision of gear shaper and the error of generated gear are analyzed and simulated.3 Applying finite element software, the natural frequency and mode of NC gear shaper are analyzed.

本文针对插齿机数控化中的关键技术，以数控插齿机为研究对象，做了以下研究工作：1 设计完成YK5120型数控插齿机机械结构；2 建立了数控插齿机的三维模型，并对其进行了运动仿真和干涉检验；3 以多体系统运动学理论为基础，对数控插齿机的精度和齿轮加工误差进行了分析与仿真；4 应用有限元软件，对数控插齿机的各阶固有频率及振型进行了分析。

According to above, the theory analysis and numerical simulation and such methods are used in this dissertation for the analysis of several mechanical problems in steel girder bridge system.

基于此思想，本文采用理论分析、数值模拟等方法对钢箱梁桥面铺装体系的若干力学问题进行了研究。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐