基于人工神经网络的聚类算法

研究连续型Hopfield神经网络的电路机理,推导出网络的权值计算公式,并运用连续型的神经网络模型构造出聚类算法;对20个随机生成数据计算模拟神经网络的运行,逐步调整类内精度多次训练,当参数a=b=500,c=200且类内精度控制不超过0.6时,有一个优化的聚类方案输出。     

基于前向神经网络和Hopfield反馈神经网络的边界检测法

提出了一种新的基于前向神经网络和ｏｐｆｉｅｌｄ反馈神经网络的边界检测法,它分别探测每个象素点是否为边界点,便于实现边界检测的并行运算。首先讨论了两层前向神经网络来增强的编码被检测象素点邻域的信息,然后利用增强和编码后的邻域图象作为Ｈｏｐｆｉｅｌｄ反馈神经网络的输入,Ｈｏｐｆｉｅｌｄ神经网络收敛时得到图象边界点。这种新的神经网络边界检测法所需的计算量比传统的Ｈｏｐｆｉｅｌｄ网络边界检测法少得多,并增     

基于DHNN指纹库的电网故障诊断方法

针对高维度、非线性的电力系统存在难以实现快速、精准和有效的故障诊断问题,提出了基于DHNN指纹库的电网故障诊断方法.首先利用离散Hopfield神经网络(DHNN)算法对电网遥信数据分类和建立各种基准信号权值,构建了基准信号集合的信号模板;其次基于该模板建立各类故障指纹值编码及其编码组合为一体的指纹库;最后以瀑布沟水电...     

基于混合遗传算法的固定货架拣选优化问题研究

采用一种结合Hopfield网络模型的遗传算法,解决了自动化立体仓库中固定货架拣选作业路径优化问题。 在利用Hopfield/Tank神经网络的快速局部搜索能力的同时,又利用了遗传算法的全局寻优特性,有效地获得全 局优化的拣选路径。仿真结果表明,算法能够满足待拣选货位点数目在较大范围内变动的要求。     

基于离散型Hopfield神经网络的供应商评价模型

供应商评价是供应链管理中一项重要的研究内容，为此，提出并建立了一种基于离散型Hopfield神经网络的供应商评价模型。该模型结合层次分析法，实现了采购供应链中供应商的多指标评价，提高了供应商选择过程的客观性；根据评价指标权重对神经元分组，克服了离散型Hopfield神经网络难以表达指标权重的缺点；最后，用实例对模型进行了验证。     

Catastrophic Forgetting and the Pseudorehearsal Solution in Hopfield-type Networks

Pseudorehearsal is a mechanism proposed by Robins which alleviates catastrophic forgetting in multi-layer perceptron networks. In this paper, we extend the exploration of pseudorehearsal to a Hopfield-type net. The same general principles apply: old information can be rehearsed if it is available, and if it is not available, then generating and rehearsing approximations of old information that 'map' the behaviour of the network can also be effective at preserving the actual old information itself. The details of the pseudorehearsal mechanism, however, benefit from being adapted to the dynamics of Hopfield nets so as to exploit the extra attractors created in state space during learning. These attractors are usually described as 'spurious' or 'cross-talk', and regarded as undesirable, interfering with the retention of the trained population items. Our simulations have shown that, in another sense, such attractors can in fact be useful in preserving the learned population. In general terms, a solution to the catastrophic forgetting problem enables the on-going or sequential learning of information in artificial neural networks, and consequently also provides a framework for the modelling of lifelong learning/developmental effects in cognition.     

用连续Hopfield网络实现无限时域上的最优控制

为避免直接采用Riccati方程求解时变系统无限域最优控制问题时的计算困难,本文提出一种基于时间连续状态连续型Hopfield网络(CTCSHNN)实现无限域动态最优控制的方法．该方法通过建立CTCSHNN能量函数与移动域控制指标间的等价关系,可在线构建CTCSHNN．理论分析表明,依据该方法设计的CTCSHNN具有稳定性,而且移动域控制量可由网络稳态输出直接产生．将该方法与滚动优化策略相结合,可实现无限时域上的闭环最优控制．仿真实验验证了理论设计的正确性与采用基于CTCSHNN的移动域控制实现无限域闭环最优控制的可行性．     

基于Hopfield网解决TSP问题

利用神经网络解决组合优化问题是神经网络应用的一个重要方面。组合优化问题,就是在给定约束条件下,使目标函数极小(或极大)的变量组合问题。首先介绍了Hopfield神经网络的工作原理,然后具体介绍了TSP问题,然后给出了Hopfield神经网络解决TSP问题的实例,最后的结果表明利用Hopfield神经网络解决TSP问题可以求得问题最优解的次优解。     

Machine cell formation considering processing times and machine capacities: An ortho-synapse Hopfield neural network approach

The machine/part grouping problems can be classified into binary and comprehensive grouping problems depending on whether or not the processing times and the machine capacities are considered. The binary grouping problem arises if the part demands are unknown when the CMS is being developed. If the part demand can be forecast accurately, both the processing times and machine capacities have to be included in the analysis. This gives rise to comprehensive grouping. Both the binary and comprehensive grouping have been proven to be NP-complete which cannot be solved in polynomial time. Considering the large number of parts and machines involved in the industrial design problem, efficient solution methods are highly desirable. In this paper, a new neural network approach (OSHN_g) is proposed to solve the comprehensive grouping problems. The proposed approach has been tested on 28 test problems. The results show that the OSHN_g method is very efficient and its solution quality is comparable to that of a simulated annealing approach.     

神经网络辨识方案在异步电机传动系统参数辨识中的应用讨论

本文将Hopfield神经网络引入异步电机传动系统的参数辨识，通过大量仿真结果，详细讨论了在辨识网络输入为经传感器延迟的检测信号的情况下，系统能够正确辨识的充分条件。