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针对一般模糊极小极大神经网络在处理重叠超盒和包含超盒时,出现新的类而标识为未知类,进而无法达到聚类预期效果的问题,提出了通过超盒的收缩过程来加入新类或删除一个已存在类的一般模糊极小极大神经网络,它继承了一般模糊极小极大神经网络的优点,并且避免了一般模糊极小极大神经网络在分类时的随意性,弥补了一般模糊极小极大神经网络无法达到聚类预期效果的目的,以及提高了模式分类的准确性和高效性.最后,通过实例验证了方法实用有效. 相似文献
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Mode-II Crack Problem for a Long Rectangular Slab of Superconductor under an Electromagnetic Force 下载免费PDF全文
We present a theoretical analysis to the fracture parameters of the large single domain YBCO superconductor with a tangential line crack under electromagnetic force. The mode-II fracture parameters are obtained due to coupled finite element and infinite element method, and the numerical results are conducted for two activation processes. For a zero-field cooling (ZFC) magnetization process, in the process of magnetic field descent, the larger the applied field is, the larger the stress intensity factors. In the case of field cooling (FC) magnetization process, the stress intensity factors have obvious differences between the two cases of bfc 〉 1 and bic ≤1. Additionally, J-integral characteristic is obtained, and according to these results, the mode-Ⅱ crack growth trend is predicted. These results are benefit for us to understand the fracture mechanism of superconductor both in theory and application. 相似文献
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