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a numerical
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  数值
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    LQ最优控制系统加权矩阵Q的一种数值算法
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    One of these two methods is based on nonlinear transfer fi. inction; the other is a numerical method based on Newton-Raphson algorithm.
    本文提出了两种分析含摩擦环节伺服系统爬行现象的方法,一种是基于非线性传递函数理论的方法,另一种是以Newton-Raphson算法为基础的数值方法。
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    The very basic concepts regarding fractional order calculus were addressed and a numerical method for solution of the fractional order differential equations were determined.
    分数阶微积分理论、分数阶微分方程理论以及数值解法是分数阶控制理论的基础性内容,为分数阶控制理论以及实际的应用提供了重要的理论基础。
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  一个数值
    A numerical example is given to demonstrate the design procedure of the decentralized feedback robust controllers, in the light of the method developed in this paper.
    根据本文提出的方法,给出了一个数值例子以说明分散反馈鲁棒控制器的设计过程.
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    A numerical example shows the effectiveness of the proposed optimization method.
    一个数值例子说明了这种试化方法的有效性。
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    Some sufficient conditions for the existence of such state feedback law and a numerical example are given in the paper.
    文中给出了这样的状态反馈律存在的一些充分条件和一个数值例子。
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    A numerical example is wlso given.
    本文给出了一个数值例子。
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    Existence conditions for expected order reduction model and their analytical expressions are given. Finally,a numerical example is also presented.
    文中导出了期望的简化模型的存在条件及解析表达式,并提供了一个数值算例。
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  a numerical
The essential dimension is a numerical invariant of the group; it is often equal to the minimal number of independent parameters required to describe all algebraic objects of a certain type.
      
Then, we describe a numerical method to compute the dual function and give an estimate of the error.
      
The popularity of PSWFs seems likely to increase in the near future, as band-limited functions become a numerical (as well as an analytical) tool.
      
A numerical example illustrates that the method is available.
      
A numerical example is given to illustrate the solution procedure.
      
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This paper provides a complete analysis for the reliability of standby redundancy systems. A set of formulas for predicting the reliability have been derived and a numerical example is given in detail. First, the reliability of the automatic transfer device itself is carefully analyzed through the consideration of the dynamic and static failures of the monitors and transfer switches, then according to the two forms of the transfer devices these failures are classified into independent and dependent groups....

This paper provides a complete analysis for the reliability of standby redundancy systems. A set of formulas for predicting the reliability have been derived and a numerical example is given in detail. First, the reliability of the automatic transfer device itself is carefully analyzed through the consideration of the dynamic and static failures of the monitors and transfer switches, then according to the two forms of the transfer devices these failures are classified into independent and dependent groups. Finally, we find out that the independent transfer device is much better than the dependent form in system reliabi- lity. At the same time the author points out that the unreliability of the transfer device must be smaller than that of the individual subsystems, otherwise you could not get any improvement in the whole system reliability. In addition, the obvious con- clusions about the effects of the stop devices and the advantages of the warm and cold standby redundancy systems are obtained.

本文全面分析了备用复式系统的可靠性问题,推导出成套的预计公式并给出一个详细的计算实例。首先,通过考虑监控器和转换开关的动态和静态故障,细致地剖析了自动控制器本身的故障。然后,按照公用与独立两种型式的转换器,划分这些故障为独立与相依两类,并且归结到独立转换器远比公用转换器为优。同时指出转换器本身的故障必须小于各个分系统的故障,否则就不可能提高总系统的可靠性。此外,对自动停车措施的得失及温冷混合贮备的优点,也都得到了明确的结论。

Due to the wide application of computers, it is possible to makeaccurate quantitative analysis for kinematic characteristics of cine claw escapementmechanism. In this paper, a set of formula is introduced as a numerical solution forthe kinematic characteristics of two types of claw escapement mechanism, using co-ordinate calculation and vector methods. These formulae can be conveniently program-med. An approximate formula is also introduced with the effect of film guide ta-ken into consideration.

电子计算机的广泛应用,对于电影摄影机抓片机构的运动特性可以作出精确的定量分析。本文应用座标计算方法和矢量方法导出了两种抓片机构运动特性的数学计算公式。应用这些公式可以方便地编制计算程序进行数值计算。考虑到片槽的影响,本文也导出了相应的近似计算公式。

The, present paper deals with the analytical determination of the axis and the angle of rotation for a retractable landing gear. To facilitate the use of computer, the socalled rotation matrix [A] about a skew axis PP is worth applying. If the coordinates of three points, say A, Band C,of a rigid body before and after rotation about an axis through point P are known, the rotation matrix [A] can be easily calculated as follows: where subscripts 1 and 2 stand for points before and after rotation respectively....

The, present paper deals with the analytical determination of the axis and the angle of rotation for a retractable landing gear. To facilitate the use of computer, the socalled rotation matrix [A] about a skew axis PP is worth applying. If the coordinates of three points, say A, Band C,of a rigid body before and after rotation about an axis through point P are known, the rotation matrix [A] can be easily calculated as follows: where subscripts 1 and 2 stand for points before and after rotation respectively. Here a simple technique for obtaining the third point C from the two given points A and B of a rigid body is introduced. Any arbitrary point on the line passing through P and perpendicular to the plane formed by two given straight lines PA and PB can be taken as the point C.In addition, some improvement in calculating the axis and the angle of rotation has been made. A numerical example of landing gear problem is included at the end of the paper.The results obtained may be applied to design of retrac-table mechanisms for antennas and sensors on spacecraft as well.

本文对用解析法确定起落架收放中转轴及转动的问题,进行一些探讨,除提出如何利用刚体绕斜轴的转动矩阵进行求解外,还对转轴和转角的某些求法进行补充。文中附有一飞机起落架收放算例。本文内容也可用于航空、航天器中一些天线、传感器等的收放设计。

 
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