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完全微分
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     The Simulation of the Control over an Automatic Speed Regulating System with Incomplete Differentiation PID
     不完全微分PID控制自动调速系统仿真
短句来源
     Application of PID Algorithm with Incomplete Derivation in Time-delay System
     不完全微分PID算法在纯滞后系统中的应用
短句来源
     (2) A low pass filter is placed after the differential portion of PID & PD controller on purpose of smoothing the instinct sensitivity of differential portion against error signal disturbance.
     在微分项后插入低通滤波器可以抑制微分环节对流量扰动的敏感性。 不完全微分PID、PD控制器继承PID、PD控制器响应速度快,参数配置方法规范等优点。
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     Compared with traditional PID (PD) controllers, partial differential PID (PD) controllers perform better when coping with burst traffic.
     仿真证明,不完全微分PID、PD对频繁变化的流量环境的适应性要优于PID、PD算法和其他一些AQM控制器。
短句来源
     Secondly,the paper gives PID controlcomputer algorithm,on this base,integral division PID control,PID control withadvanced differentiation,PID control with uncompleted differentiation and PIDcontrol with dead band algorithm are introduced. The principle of Fuzzy control,thebasic structure of Fuzzy controller and the basic design methods are presented.
     其次,论文介绍了最常用的PID调节计算机控制方法,并在此基础上分别介绍了积分分离PID控制、微分先行PID控制、不完全微分PID控制和带死区的PID控制算法,介绍了模糊控制原理,说明了模糊控制器的基本结构和模糊控制器的基本设计方法。
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     The Pattern of Differential
     微分模式
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     The Theorems of Total Asymptotic Stability for Functional Differential Equations
     关于泛函微分方程的完全渐近稳定性定理
短句来源
     Total Overall Stability of the Solution of Functional Differential Equations with Intinite Delay
     无穷时滞泛函微分方程解的完全全局稳定性
短句来源
     Differential phase
     微分相位的测量
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     Complete Theory for L(Q) Logic
     L(Q)逻辑的完全理论
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  complete differential
Based on topology structure analysis, the inverse and forward solutions are analyzed and the precision is studied using complete differential method.
      
Complete differential system for the mappings of CR manifolds of nondegenerate Levi forms
      
A review of the literature on this congenital abnormality and a complete differential diagnosis are presented.
      
Von Foerster (1959), however, who derived the complete differential equation for the age density function,n(t, a).
      
Kinematically complete differential cross sections in various kinematic configurations are calculated and compared with the results of an identical calculation but for the neutron-induced reaction.
      
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In this paper, first of all, a brief history of the beginning and development of the differential games in the earlier stage is stated. Furthermore, as fundamental examples, a kind of two-person zero sum differential games and one of the qualitative differential games are presented, from which one can be more concretly to understand the properties of those researched in differential games.Some problems at present are also introduced, such as the games of pursuit in air-to-air combat, the application of differential...

In this paper, first of all, a brief history of the beginning and development of the differential games in the earlier stage is stated. Furthermore, as fundamental examples, a kind of two-person zero sum differential games and one of the qualitative differential games are presented, from which one can be more concretly to understand the properties of those researched in differential games.Some problems at present are also introduced, such as the games of pursuit in air-to-air combat, the application of differential games in system engineering and the leader-follower strategy,the differential games with imperfect information , differential games with time lag , positional differential games, and the method of functional analysis in solving differential game problems, etc. Of course, these are not the all problems of today.More than 40 literatures are listed for further research.

本文首先叙述了微分对策问题的起源及其初期的发展简史,然后介绍一类二人零和的微分对策问题和一类定性微分对策问题,以进一步说明微分对策问题的性质,这是两种比较基本的微分对策问题。 最后,介绍当前的某些问题。例如,空战格斗中的追逐对策,微分对策在系统工程中的应用以及主——从对策,信息不完全的微分对策,有时滞的微分对策,阵地对策,以及泛函分析方法在微分对策理论中的应用等。当然,这些绝非现代问题的全部。 文末附有参考文献四十余篇,供进一步参考之用。

In this paper a perfect system of partial differential equations, including continuity equation, momentum equations and energy equation for three dimensional viscous flow in turbomachines, is established by using tensor analysis. This system of equations describes more accurately the flow properties in turbomachines, such as the secondary, flow, loss due to viscousity and loss due to vorticity.Using this system of equations, we find out not only the distribution of the flow field but also the distribution of...

In this paper a perfect system of partial differential equations, including continuity equation, momentum equations and energy equation for three dimensional viscous flow in turbomachines, is established by using tensor analysis. This system of equations describes more accurately the flow properties in turbomachines, such as the secondary, flow, loss due to viscousity and loss due to vorticity.Using this system of equations, we find out not only the distribution of the flow field but also the distribution of the temperature field.

本文运用张量分析工具,对透平内部真实三元粘性流动,建立了完全的微分方程组,包括连续性方程,动量方程和能量方程,能够较真实地反映透平内部流动性质,例如二次流,粘性损失,涡流损失等.不但能求出流场,而且也能解出温度场。对这样的微分方程组,采用原始变量法,用有限元离散化,并研究了分块迭代方法求解非线性代数方程组,研制了通用程序,程序是对透平机械内部真实三元粘性流进行有限元分析,对不可压情形进行了数值试验.

A regional Reynolds stress model has been proposed in the paper based on the structure features of the turbulent shear flow. In turbulent shear flows there exist regions in which the production of turbulent energy reaches maxima and we call such regions as vital layers. The differential Reynolds stress model is applied in the vital layers, thus the transportation and redistribtron of Reynolds stress are included in these layers. Distribution of Reynolds stress outside vital layers is approximated by function...

A regional Reynolds stress model has been proposed in the paper based on the structure features of the turbulent shear flow. In turbulent shear flows there exist regions in which the production of turbulent energy reaches maxima and we call such regions as vital layers. The differential Reynolds stress model is applied in the vital layers, thus the transportation and redistribtron of Reynolds stress are included in these layers. Distribution of Reynolds stress outside vital layers is approximated by function fitting. The mean velocity and pressure fields are then solved from the averaged Navier-Stokes equation with the given Reynolds stress field stated above. The results of two testing cases of complex turbulent flows indicate that the present model is much better than usual k-e model, since the, numerical results of the present method are in better agreement with experimental data, the computing time, however, is much less titan that by use of k-e method. On the other hand, the present method can save CPU time in comparison with full Reynolds stress model.

本文根据切变湍流结构的特征提出一种分层Reynolds应力模式。在切变湍流中存在湍能生成项达到狭峰的极大值层次(本文称它为活跃层),根据这一特征,在活跃层中保留微分Reynolds应力模式,但它可以简化为常微分方程。在两层活跃层之间以及活跃层和壁面之间的Reynolds应力分布,用满足衔接相容条件的多项式近似。时均湍流场将由以上得到的Reynolds应力代入Reynolds方程求出。用本方法计算了两个比较复杂的湍流例子,结果表明,本方法较常用的k-ε模式有明显的优越性,它的计算时间并不比k-ε模式多,而计算结果与实测结果的吻合则较k-ε模式好得多。另一方面本方法较之完全的微分Reynolds应力模式可大大节省计算时间。

 
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