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21.
A test problem generator, by means of neural networks nonlinear function approximation capability, is given in this paper which provides test problems, with many predetermined local minima and a global minimum, to evaluate nonlinear programming algorithms that are designed to solve the problem globally. 相似文献
22.
Evaluation of fuzzy regression models by fuzzy neural network 总被引:1,自引:0,他引:1
M. Mosleh M. Otadi S. Abbasbandy 《Journal of Computational and Applied Mathematics》2010,234(3):825-834
In this paper, a novel hybrid method based on fuzzy neural network for approximate fuzzy coefficients (parameters) of fuzzy linear and nonlinear regression models with fuzzy output and crisp inputs, is presented. Here a neural network is considered as a part of a large field called neural computing or soft computing. Moreover, in order to find the approximate parameters, a simple algorithm from the cost function of the fuzzy neural network is proposed. Finally, we illustrate our approach by some numerical examples. 相似文献
23.
射频功率放大器的线性化技术 总被引:1,自引:0,他引:1
李军 《信息技术与信息化》2003,(4):29-30
本文阐述了射频功率放大器非线性产生的原因 ,介绍了几种射频功放的线性化技术 ,以便于射频功放设计者参考 相似文献
24.
In this paper, a Low Noise Amplifier (LNA) with the current reused topology is proposed for wideband applications. To increase input impedance matching common source with inductive degeneration and RC shunt feedback structure is used. To extend the bandwidth, inductive series peaking technique is utilized. In the next stage, two parallel structure is hired to have a high voltage gain with low power consumption in addition to improve linearity. Also, by using the self-forward-body-bias (SFBB) technique, supply voltage is reduced and as a result power consumption is decreased further. The proposed LNA exhibits the high and flat gain of 14.7–15.4 dB, input return loss of less than −11 dB and noise figure range of 2.3–4.4 dB from 1 GHz up to 8 GHz. It consumes 5.4 mW from a 1.2 V power supply. The achieved IIP3 range for the proposed LNA is 0 dBm up to +2.7 dBm. The proposed LNA occupies 0.45 mm2 in 0.18-μm CMOS technology. 相似文献
25.
《Mechatronics》2021
In this paper, anti-swing control for a hydraulic loader crane is presented. The difference between hydraulic and electric cranes are discussed to show the challenges associated with hydraulic actuation. The hanging load dynamics and relevant kinematics of the crane are derived to create the 2-DOF anti-swing controller. The anti-swing controller is added to the electro-hydraulic motion controller via feedforward. A dynamic simulation model of the crane is made, and the control system is evaluated in simulations with a path controller in actuator space. Simulation results show significant reduction in the load swing angle during motion. Experiments are carried out to verify the performance of the anti-swing controller, showing good suppression of the payload angle in practice. 相似文献
26.
微波前馈功率放大技术 总被引:1,自引:0,他引:1
技术的发展带动了对高线性、高功率微波放大器的需求。传统的功率回退应用方法存在器件及效率方面的限制。文中分析了前馈技术提高功放线性度的原理,并给出C波段前馈功率放大器实例。 相似文献
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二元Bent序列的前馈生成* 总被引:2,自引:2,他引:0
通过对[1]中二元Bent序列的等价定义,本文给出了使用前馈网络生成二元Bent序列的快速方法,使二元Bent序列的产生比[2]中的方法简单,迅速。 相似文献