In practical calculating results , comparing with the method of least squares , the compensation precision can be improved about 10 % when using the best approximations algorithm 通过多组实验数据的理论计算结果的比较可以看出,由最佳一致逼近算法求取的精度比最小二乘法求取的精度要高10 %左右。
Basic theory of fir filter is introduced in the first place . the systematic structure of fir filter is discussed and several design theories are compared , in which chebyshev optimal theory is emphasized 论文首先介绍了fir滤波器的理论基础,探讨了滤波器的系统结构,对几种滤波器常用设计方法作了比较,利用chebyshev最佳一致逼近原理,给出了最优法设计fir滤波器的流程图。
After getting the experiment data , the resistance value and the deviation value of compensation voltage can be calculated by the two algorithms which can be realized by vb program language and math software such as matlab and maple 得到采集数据以后,通过vb编程语言, matlab和maple数学计算软件编程,利用最小二乘法和最佳一致逼近算法,计算出补偿网络的电阻参数和补偿电压的拟合差值。
The fuzzy system is founded to describe the operation mechanisms of human mind . it can ' describe a function founded on a set especially with non - linear characteristics with high accuracy . because it has the non - linear characteristic 由于模糊系统以模仿人脑的运行机制为目标，在函数逼近方面来看，模糊系统能够在任意精度上一致逼近任何一个定义在一个致密集上的函数，具有很强的非线性映射能力。
Maximum entropy method is an effective smoothing one for the finite min - max problem , which , by adding shannon ' s informational entropy as a regularizing term to the lagrangian function of min - max problem , yields a smooth function that uniformly approaches the non - smooth max - valued function 极大熵方法是解有限极大极小问题的一种有效光滑化法，它通过在极大极小问题的拉格朗日函数上引进shannon信息熵作正则项，给出一致逼近极大值函数的光滑函数。
All information about initial values for design is provided by the chart , thus the synthesis can be carried out by minicomputer , the process shows that it is easy to converge , and the optimum equal approximation guarantees the error of derived mechanism in the approximation region is minimal 以线图的形式提供了这类设计问题所需初始值的全部信息，使迭代法设计过程在微机上得以实施，运算收敛快，而最佳一致逼近法求解的机构则保证在逼近区间误差最小。
The best approximations algorithm is just the method which can solve the mini - max solution of the least value of frequency deviation . because of the reason above , in this paper the best approximations algorithm is introduced into calculating the parameters of atcxo compensation network for the first time 最佳一致逼近算法正是能够求解出使频率偏差的绝对值最小的极小极大解的一种方法,为此将最佳一致逼近算法首次应用于模拟温补晶振补偿网络参数的计算中。
This system is realized in the way of software radio and mainly based on the dsp circuit , which includes a cpld chip to control the logic and time sequence . at the same time , the whole system achieves its minimum bulk , weight and power because of the excellent performance of these chips . ( 3 ) in the fir digital filter design , the optimal consistent approach and matlab simulation is adopted 设计出基于dsp的硬件电路系统，用cpld进行逻辑和时序控制，以减小体积和重量，同时选择了低功耗的芯片以降低系统功耗需求； ( 3 )着手系统中数字滤波器的设计，采用切比雪夫最佳一致逼近法，利用matlab进行带通和低通滤波器的仿真设计。
Furthermore , a fault accommodation method for a class of nonlinear system , which can be changed into output - feedback form , is proposed using a neural - network - based adaptive observer . the system faults can be detected through the residual generated by the proposed observer . the stability of closed - loop error system is guaranteed by lyapunov stability theory 针对该类系统,利用神经网络的一致逼近任意非线性连续函数的性质,构造神经网络自适应观测器来获取反映故障信息的残差,采用lyapunov稳定性理论证明了误差系统的稳定性。
In the theoretical calculation , the best approximations algorithm shows its practicability and superiority comparing with the method of least squares . in the practices production , the practicability of the best approximations algorithm can be shown . the frequency stability is about 1ppm in the temperature range : - 20 70 . the frequency stability 在实际生产中最佳一致逼近算法具有实用性,用该算法求取的电阻参数来装配补偿网络,在- 20 - 70窄温度范围内atcxo的频率稳定度为: 1ppm左右; - 40 - 80宽得温度范围内频率温度度在: 2 . 5ppm左右。
