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symbolic parameter
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  符号参数
     At last,the mapping data is obtained illustrated by the spatial geometric data and the related symbolic parameter satisfied information of GIS is produced.
     由此不断改写全局数据库,使之逐步趋近为具有一体化特征的矢量地理信息,形成矢量智能化处理流程。 在获取满足GIS要求数据的同时,获取用空间几何数据和相应符号参数表示的制图数据。
短句来源
  相似匹配句对
     estimation of its parameter;
     评定运动模糊的参数;
短句来源
     Scattering Parameter
     散射参数
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     On Symbolic speech
     论象征性言论及其保护
短句来源
     High accurate symbolic algorithm based on the principle of equivalent small parameter method
     基于等效小参量法原理的高准确度计算机符号分析算法
短句来源
     Augmented Network Principle and Computer-Aided Symbolic Analysis of S-parameter Microwave Network
     S参数微波网络的增广网络原理及其计算机辅助符号分析
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  symbolic parameter
Finally, an algorithm to simplify hierarchical formulae is presented which includes consideration of the potential ranges of variation in the symbolic parameter values.
      
It is a symbolic parameter W, standing for word with the de ned possible values.
      


The properties of linear networks can usually be characterized better by symbolic network functions than by numerical analysis results. This paper describes a network function as a rational fraction with the aid of the determinant and a relevant cofactor of the network nodal admittance matrix. The parameter extraction method is used to express the numerator and denominator of the fraction, respectively, as the sum of a number of items,each of which is a product of a symbolic parameter or a combination...

The properties of linear networks can usually be characterized better by symbolic network functions than by numerical analysis results. This paper describes a network function as a rational fraction with the aid of the determinant and a relevant cofactor of the network nodal admittance matrix. The parameter extraction method is used to express the numerator and denominator of the fraction, respectively, as the sum of a number of items,each of which is a product of a symbolic parameter or a combination of some symbolic parameters and a polynomial with respect to the complex frequency S. The interpolation approach is used to calculate the real coe-ficients of the polynomials. Some improvements have been made to the parameter extraction method, which makes the whole algorithm simpler and more effective.

符号网络函数,与网络的数值分析结果相比,往往可以更好地描述线性网络的性能。本文借助于网络的节点导纳矩阵的行列式及有关的代数余子式将网络函数表示成有理分式,采用参数抽取法将分式的分子和分母分别表示为若干项之和,这些项分别为各个网络符号元件或它们的可能的组合与一个关于复频率S的多项式的乘积。多项式的各阶实系数采用插值法进行计算。笔者对参数抽取法的策略作了改进,使整个算法简单而有效。

A knowledge-based symbolic circuit analysis program-SYMBANA is introduced.With inputs and symbolic parameters,the program outputs the symbolic expression of the circuit function such as voltage gain Au=Vo/Vi and the symbolic expression of sensitivity(?Av/?pi)for given parameter(pi).Written in micro-prolog,SYMBANA uses knowlege processing and inference.It can be run on IBM PC/XT,AT and their compatible computers.SYMBANA can be used as CAD/CAI tool in electronic field.

本文介绍基于知识处理的电路符号分析程序SYMBANA.利用输入电路结构和符号参数,程序自动输出电路函数(例如,电压放大系数Av=v_0/vi)的符号公式和指定参数Pi的敏感度?Av/?Pi的符号表达式.SYMBANA运用知识处理技术和演绎方法,进行电路符号公式和参数敏感度的推导.SYMBANA是用micro-prolog写成,运行于IBM PC/XT,AT及各种兼容机.SYMBANA可用于各种电路分析、优化设计和计算机辅助学习.

A new method is presented for obtaining symbolic network functions. This meth-od is different from the topological tree enumeration or signal flow graph methods generallyused to derive symbolic network functions.It makes a symbolic network matrix be subnumericby being coded symbolic parameters,so it’s process is fast and efficient.A computerprogram SNSPC ( symbolic network simulation by paraemter coded) which is based on thismethed is developed,and the effectiveness of SNSPC is...

A new method is presented for obtaining symbolic network functions. This meth-od is different from the topological tree enumeration or signal flow graph methods generallyused to derive symbolic network functions.It makes a symbolic network matrix be subnumericby being coded symbolic parameters,so it’s process is fast and efficient.A computerprogram SNSPC ( symbolic network simulation by paraemter coded) which is based on thismethed is developed,and the effectiveness of SNSPC is illustrated with several examples.

提出了实现带有符号参数的电网络函数的一种新算法。与符号处理过程中常使用的拓朴树枚举法、信号流图法有质的区别。它采用符号参数编码,仗其准数值化。因此计算机处理这种电网络就象处理数值电路一样,快捷、有效,同时节省内存空间,提高了分析电路的规模,根据本文思想所开发的软件系统(symbolicnetworksimulatorbyparametercoded简称SNSPC)已经完成。最后,举例说明了这种算法的有效性。

 
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