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Based on a microcomputer, authors developed an interferogram data analysis system which can perform wavefront interpolation, aberration analyses, OPD contour mapping,PSF and OTF calculations etc.,The system is also capable of correcting errors caused by interferometers and measuring average wavefront curvature.The algorithms may be applied to any interferometric systems with a standard reference wavefront. 利用微处理计算机建立了干涉条纹的数据分析系统,其中包括波面插值、象差和面形分析、点扩散函数、积分能量分布和光学传递函数的计算等.该系统还可修正干涉仪的误差、测量波面平均曲率等. Principles of interlaced coding and the corresponding theorems arediscussed. Circuitry of interlaced encoder and decoder and some experimental results are then given. A simplified method of describing the generated matrix of interlaced code is demonstrated, which is very useful when the degree of interlacing becomes high enough.The author analysed its ability of correcting errors and got the concl usion that the ability of correcting burst errors increases proportionally with the increase of... Principles of interlaced coding and the corresponding theorems arediscussed. Circuitry of interlaced encoder and decoder and some experimental results are then given. A simplified method of describing the generated matrix of interlaced code is demonstrated, which is very useful when the degree of interlacing becomes high enough.The author analysed its ability of correcting errors and got the concl usion that the ability of correcting burst errors increases proportionally with the increase of the degree of interlacing, and the ability for correcting random errors varies with the change of conditions. By using the interlacing technique the long code necessary for correcting bursf errors can be simplified as that of finding optimal short codes and the procedure of coding is much simplified.It can be seen that the construction of interlaced encoder and decoder is simple and the hardware eaisly implemented.Interlaced code is able to prevent either random or burst errors and is thus recommendable for use in telecontrol instruction coding. 本文对交错码的工作原理及有关定理进行了简明阐述。介绍了我们研制的交错码的编译码器电路及实验结果。在实践中找到简化求交错码生成矩阵的方法,在交错度很大时优越性更为突出。本文对交错码的纠错能力进行了探讨,得出了交错码纠突发错误能力随交错度增加而成此例增大,纠随机错误能力视不同情况有所区别。通过交错技术的应用,将寻求长而有效的纠突发错误的码简化为求最佳的短码,从而大大简化了构造长码的手续和步骤。实践证明,交错码的编译码器设备简单,易于硬件实现。 综上所述,交错码是一种既能抗随机错误又能抗突发错误的组合信道编码,为遥控指令码,具有明显的优点。 Adjusting control system with Bode diagram has been a common method in certain fields, but remains a new subject .in the field of heat-engine control. In this article, a method is raised to adjust the control system for heat-engine process by use of Bode diag-ram, particularly with regard to the characteristics of the controlled object and operating regulator. The chief points are:1.The general rule of both heat-engine control object and regulator in Bode diagram construction has been found, and then to produce... Adjusting control system with Bode diagram has been a common method in certain fields, but remains a new subject .in the field of heat-engine control. In this article, a method is raised to adjust the control system for heat-engine process by use of Bode diag-ram, particularly with regard to the characteristics of the controlled object and operating regulator. The chief points are:1.The general rule of both heat-engine control object and regulator in Bode diagram construction has been found, and then to produce a method for simplifying the diagram and correcting errors, with the result that adjustment with Bode diagaram will become simple and practilce in utilization.2.To develope the method and its steps for adjusting the control system, through using approximate Bode diagram, and in particular to develop procedures and principles for determination of regulator integration time T1 and differentiation time Td.The chief advantage of using Bode diagram in adjusting heat-engine control system is -there is no restriction with respect to type and order of the controlled object, as well as to the number of regulator parameters and criteria of adjustment. The method described is distinguished by its extensibilty and flexibility in aplication. 用伯德图校正控制系统,在某些部门已是常用的方法。但对热工过程控制却是一个新课题。本文针对热工控制对象和调节器的特点提出用伯德图整定热工过程控制系统的方法。其要点是:1.找出了热工控制对象和调节器二者伯德图构成的共同规律,在此基础上提出简化作图和误差修正的方法,使伯德图整定法成为简单实用的方法。2.建立了用近似伯德图整定系统的方法步骤,特别是确定调节器积分时间T_i和微分时间T_d的原则及方法。用伯德图整定热工控制系统的主要优点是不受热工控制对象类型、阶数的限制;不受调节器参数个数及整定指标取值的限制。此法应用上具有广泛性和灵活性。
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