共查询到18条相似文献,搜索用时 171 毫秒
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运用蚁群算法和神经网络构造了大坝渗流监测的蚁群人工神经网络模型,采用蚁群算法学习了神经网络的权值.实例表明,用蚁群算法训练神经网络可兼有广泛映射能力和快速全局收敛性能,与常规统计模型相比,提高了模型拟合精度和预测能力. 相似文献
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子波神经网络在柴油机电控燃油喷射系统中的应用 总被引:1,自引:0,他引:1
本文论述了子波神经网络的应用背景,研究了子波神经网络的结构和算法及其在柴油机电控燃油喷射系统中的应用,并与BP神经网络进行了比较。结果表明:子波神经网络具有收敛速度快,逼近性好,学习精度高等优点。 相似文献
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提出用结构电阻来表达网络结构和运行方式对配电网线损的影响,并应用反向传播神经网络和连续同伦学习算法拟合一个中压配电网有代表性的线损数据.同伦算法具有全局收敛特性,迭代次数比常规迭代算法大大减少,且达到较高收敛精度. 相似文献
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为克服径向基函数(RBF)神经网络由于参数选取不当而对其收敛性能的干扰,利用粒子群优化算法(PSO)的全局搜索能力对RBF神经网络的三个参数进行寻优,建立了基于PSO RBF神经网络算法的城市需水量预测模型。结果显示,PSO RBF神经网络算法拟合某市1998~2007年需水量数据的平均相对误差为0.18%,预测2008~2010年需水量数据的平均相对误差为3.84%,耗时1.2 s;通过RBF神经网络算法拟合的误差平均值为0.28%,预测的平均相对误差为5.62%,耗时2.1 s,表明PSO RBF神经网络算法具有更高的收敛速度与精度。 相似文献
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Online estimation of rotor resistance is essential for high performance vector controlled drives. In this paper, a novel modified neural algorithm has been identified for the online estimation of rotor resistance. Neural based estimators are now receiving active consideration as they have a number of advantages over conventional techniques. The training algorithm of the neural network determines its learning speed, stability, weight convergence, accuracy of estimation, speed of tracking and ease of implementation. In this paper, the neural estimator has been studied with conventional and proposed learning algorithms. The sensitivity of the rotor resistance change has been tested for a wide range of variation from -50% to+50% on the stability of the drive system with and without estimator. It is quiet appealing to settle with optimal estimation time and error for the viable realization. The study is conducted extensively for estimation and tracking. The proposed learning algorithm is found to exhibit good estimation and tracking capabilities. Besides, it reduces computational complexity and, hence, more feasible for practical digital implementation. 相似文献