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  ' control
     This paper studies the mechanism of the losing stability of the consequent slope by a cusp catas trophe model. A bifurcation set B which makes the system to lose its stability in the P'-N' Control space is determined. Further, the necessary and necessary-sufficient mechanics criteria are derived for the unstable slope.
     本文用尖点突变模型,分析了顺层斜坡失稳机制,确定了P’—N’控制空间中使系统失去稳定平衡的分叉又集B,进而导出了斜坡失稳的力学必要、充要条件判据。
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     The primary results obtained are as follows; demarcation of the stability and unstability regions in motion of the rock mass in the P'-N' control space, analysis of the process of sudden state variation due to the gradually changing forces, discussion of the stirring disturbance mechanism when the slope state is close to the critical one.
     据此:对P’—N’控制空间中使斜坡岩体运动保持稳定平衡和失稳的区域进行了划分,分析了作用力的渐变导致状态突变的过程,讨论了在斜坡趋于临界状态时垂直力的扰动触发机制,并对霸王山顺层滑坡进行了计算校核。
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  “’控制”译为未确定词的双语例句
     The optimal control ofhybrid system with known initial states and run time and unfixed final state isinvestigated, application of differential dynamic programming under variouscircumstance such as no cost, constant cost and functional cost of switching isdiscussed.
     针对初态已知、时间固定、末态未知的自治切换混杂系统的局部最优控制方法进行了研究。 详细探讨了须分动态规划方法在切换无代价、切换代价为常数、切换代价为函数等各种不同情况下的应用,微分动态规划方法是求解优化’控制问题局部最优解的有效算法。
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     In terms of boundury conditions defined by NURBS surfaces, a method of using PDE to construct shape adjustable surfaces is discussed. The shape is controlled by some parameter 'a'. This paper analysis the principles and procedures of the method and explains the applications in CAD by several examples.
     由非均匀有理B样条(NURBS)曲线曲面给定边界条件(边界值或者再加上边界导矢),用偏微分方程(PDE)来构造曲面,以参数‘a’控制其整体形状,本文分析其思路原理及过程,并列举了在CAD上的应用,最后分析了优缺点。
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  相似匹配句对
     Boundary Control
     边际控制
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     Controlling F.
     因此控制F.
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  ' control
Some applications are given to control theory for partial differential equations.
      
Thus, PPARα/γ dual agonists may provide superior therapy to the current PPARγ-selective agonists, due to the additional lipid control afforded by the PPARα component.
      
Study subjects were divided into three groups: subjects in group 1 were microalbuminuric diabetic (n = 33), in group 2 subjects were normoalbuminuric diabetic group (n = 32), and group 3 was formed from nondiabetic healthy control subjects (n = 18).
      
Serum VEGF concentrations were significantly higher in the diabetic groups than in the control group even at the normoalbuminuric stage.
      
Compound IVc indicated the best antibacterial activity compared with the control drug ampicillin (CAS 69-53-4).
      
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In ordinary sampled-data control systems the system response to a step input can reach its equilibrium state only within n or more sampling intervals (n is the order of the controlled plant). In this paper multiple-impulses are used, instead of ordinary simple impulses, to speed up the system response. In such sampled data systems the system response to step input can reach its equilibrium state within less than n, even one, sam-pling intervals. Methods of design of such kind of sampled-data systems and their...

In ordinary sampled-data control systems the system response to a step input can reach its equilibrium state only within n or more sampling intervals (n is the order of the controlled plant). In this paper multiple-impulses are used, instead of ordinary simple impulses, to speed up the system response. In such sampled data systems the system response to step input can reach its equilibrium state within less than n, even one, sam-pling intervals. Methods of design of such kind of sampled-data systems and their com-ponents are discussed. In the last part of the paper methods of compensating sampled data systems with dead time elements is also considered.

在通常的脉冲控制系统中,当输入信号是阶跃函数时,系统的过渡过程至少在n个采样周期内才能完全结束(n是控制对象的阶数).文中考虑了采用宽度不等的多拍脉冲代替通常的单拍脉冲以加快系统的过渡过程.在采用多拍脉冲以后,系统的过渡过程可以在少于n个采样周期内,甚至在一个采样周期内完全结束.文中叙述了这种脉冲系统的综合方法,也讨论了系统中有关组成部分——脉冲组成器和校正装置——的构成方案及其参数的计算方法.最后并考虑了由于时滞引起的对系统动态特性有害影响的补偿问题.文中举有例题,对文中各节内容作必要的说明.

In this paper the general synthesis problem of optimal control systems with the criterion of transient responses as a positive integral functional (3) is discussed.In the first part it is assumed that the motion of controlled object is described by a system of ordinary differential equations and that the final states of the system form a bounded and closed convex region in n-dimentional euclidian phase space. A method is proposed for finding all optimal control functions which lead any starting state into the...

In this paper the general synthesis problem of optimal control systems with the criterion of transient responses as a positive integral functional (3) is discussed.In the first part it is assumed that the motion of controlled object is described by a system of ordinary differential equations and that the final states of the system form a bounded and closed convex region in n-dimentional euclidian phase space. A method is proposed for finding all optimal control functions which lead any starting state into the given final region of states. Some conclusions are obtained from the maximum principle by using transversal conditions of optimal trajectories in terminal points, and the particular properties of the stated problem are pointed out. The case of linear dif-ferential equations with integral quadratic functional criterion is investigated in detail.Further, in the second part the fundamental properties of isoloss regions, the rela-tions between the isoloss region and optimal control functions are indicated. As a direct result a partial differential equation determining the optimal loss-function J (x) is found and the connection between function J (x)and optimal vector control function u (x) is also stated. The methods proposed are practically the extension of the me-thods used by us for designing time optimal control systems as seen in [5, 6 ,7].Finally, an example is illustrated with optimal trajectories shown in phase plane.The necessary numerical data is calculated by an analog computer with high accuracy.

文中研究了具有公式(3)表示的一般正积分泛函的最优控制系统的综合问题.在第一部分中研究了具有控制参数的一阶微分方程组.控制系统的终点状态为n维相空间内的某一逐段光滑边界的闭性区域Ω.文中指出了根据极大值原理和轨道终点的横截条件寻找引到Ω的所有最优轨迹的方法.这里详细地研究了具有二次泛函和被积函数中不明显含有控制参数的质量指标泛函的线性方程情况.在文中第二部分研究了等损耗区的主要特性.指出了等损耗区与最优控制函数之间的关系.导出了求算最优损耗函数J(x)的偏微分方程,以及这一函数与最优控制函数u(x)的关系.上述方法是我们曾在文献[5,6,7]中用过的最优快速系统的综合方法的推广.文章最后举有例证.

This paper presents an investigation of the"Automatic Operator" of Diesel Loco-motive based on the principle of compound programming control. According to the sur-rounding conditions of locomotive, the"Automatic Operator"can change its structure automatically in order to obtain better quality of control.In this paper, the principle scheme, the characteristics of"Automatic Operator" and the experimental results of automatic control of Diesel locomotive with "Automatic Operator"are presented, the principle and...

This paper presents an investigation of the"Automatic Operator" of Diesel Loco-motive based on the principle of compound programming control. According to the sur-rounding conditions of locomotive, the"Automatic Operator"can change its structure automatically in order to obtain better quality of control.In this paper, the principle scheme, the characteristics of"Automatic Operator" and the experimental results of automatic control of Diesel locomotive with "Automatic Operator"are presented, the principle and the design of logical circuit for changing the characteristics of"Automatic Operator"is emphasized. The latter part of the paper in-cludes a discussion of quality of control; and finally, formulas for determining the para-meters of the control system are derived.

文内介绍了采用复合控制原理和根据机车所处客观条件自动切换系统结构的内燃机车程序控制方案,介绍了按此方案制成的(自动司机)总体线路及其性能.介绍了利用这台控制机进行内燃机车自动驾驶的全面试验结果.文中着重讨论了自动切换系统结构的逻辑装置的设计计算.给出了综合这类系统参数的计算公式.此外,对系统的控制质量进行了详细讨论.

 
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