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指数逼近
相关语句
  exponential approximation
     On the Best Chebyshev Exponential Approximation
     函数的最佳Chebyshev指数逼近
短句来源
     An Exponential Approximation to Continuous Function
     连续函数的一种指数逼近方法
短句来源
     4. It is put forward to adopt three-point exponential approximation nonlinear smooth filter and logarithm equal-interval based on geometry average approximation after researching on improving later signal noise ratio of transient electromagnetic signal.
     4.研究了提高瞬变电磁信号晚期信噪比的方法,提出三点指数逼近非线性平滑滤波和基于几何平均的近似对数等间隔取样处理方法,基于“烟圈”理论的一维快速反演和解释的方法,研制开发了一套ATTEM数据处理及解释软件。
短句来源
     The best Chebyshev exponential approximation is studied, its existence,uniqueness, convergence proved and characteristic property revealed. The results obtainedare surprisingly similar to those of the best Chebyshev ploynomial approximation.
     研究连续函数的最佳Chebyshev指数逼近问题,得到了最佳逼近的存在性、唯一性及特征性等方面的结果,揭示了最佳Chebyshev指数逼近与人们熟知的Chebyshev多项式逼近有极其相拟的特征性质.
短句来源
     The observer for the original system is obtained by designing the state observer for the equivalent system to realize the exponential approximation to the state and uncertain input of the original system.
     通过设计等价系统的状态观测器来获得原系统的观测器,实现对原系统的状态与不确定输入的指数逼近.
短句来源
  exponent approximation
     EXPONENT APPROXIMATION OF SOMMERFELD INTEGRALS
     索末菲积分的指数逼近
短句来源
  “指数逼近”译为未确定词的双语例句
     In this paper, the closed-form can be abtained by using Sommerfeld identity and Prony method. Each Green’s function is separated into three terms, namely:quasi-dynamic, leaky wave,and surface wave.
     本文利用Sommerfeld 恒等式对被积函数分式进行指数函数逼近,将格林函数分解成准动态项、表面波和漏波项,而对漏波项的积分通过Prony 法进行指数逼近,从而得到了格林函数的闭合形式解。
短句来源
     The method has fast and uniformconvergence. In practice its accuracy is about 0.1%, whlich is nowbelieved the limit accuracy of all the methods now available.
     该法收敛速度快,能保证一致收敛且精度达到并超过0.1%,该精度被认为是当前现有指数逼近方法的极限精度。
短句来源
     Based on the conventional ladder model, the exponential model is adopted to approach the nonuniform transmission lines.
     基于传统的阶梯式均匀传输线逼近模型,对非均匀传输线进行分段指数逼近
短句来源
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  exponential approximation
Numerical solutions are found using an implicit finite-difference scheme with second-order exponential approximation of the equations with respect to the cross-flow coordinate.
      
Two approximation laws of sliding mode for discrete-time variable structure control systems are proposed to overcome the limitations of the exponential approximation law and the variable rate approximation law.
      
An algorithm is proposed for computing velocity fields in channels on the basis of the joint application of finite-elements and finite-difference methods by using an exponential approximation of the desired functions in the elements.
      
Two point exponential approximation method for structural optimization
      
The two-point exponential approximation method was introduced by Fadelet al.
      
更多          
  exponent approximation
One popular type of approximations is called the exponent approximation which can be put in the form $$p(u) = e^{a+b\,ln\,u+cu}$$ .
      


After the path of Sommerfeld integral is changed according to Cauchy theo- rem,the partial Sommerfeld integrand function is approximatcd by a complex exponential series and Sommerfeid integral is simplified the sum of several algebra terms for complex wavenumber in exponent of Sommerfeld integrand function.Satisfied accuracy and high computing velocity are acquired and the method is hardly restricted by frequency.

指数逼近法解决了被积函数指数项中波数 k 为复数的索末菲积分,该法应用围线定理变换积分路径,把索末菲积分简化为几项解析式的近似和,它具有近似精度高,计算速度快和几乎不受频率限制的特点.

A numerical method of exponential approximaton tocontinuors function defined on semi--infinite inteval is presented and itserror estimation is also given. The method has fast and uniformconvergence. In practice its accuracy is about 0.1%, whlich is nowbelieved the limit accuracy of all the methods now available.

该文建立了半无穷区间上函数的一种指数逼近算法及误差估计。该法收敛速度快,能保证一致收敛且精度达到并超过0.1%,该精度被认为是当前现有指数逼近方法的极限精度。

The attractors of a class of dissipative evolution equations which has a compact fractal structure be proved and such a structure is given also.Furthermore,an exponentially approximating sequence of compact fractal localizing sets of the attractor will be found out and the structure of attractor of the class of dissipative evolution equations be sharpened.

证明了一类耗散发展方程的吸引子具有分形结构,并且给出了这一结构,进一步发现吸引子的指数逼近型紧分形局部化序列,这一结果精细了一类发展方程吸引子结构

 
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