A new method modeling hysteresis, expanding-space method, was proposed.

一个新的基于神经网络的迟滞建模方法——拓展空间法被提出。

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The optimum selection of bands and its combinations in remote sensing classification and the method for expanding feature space are presented.

本文结合第四纪沉积物类型的划分，讨论了遥感分类中最佳波段和波段组合的选取以及特征空间的扩充方法。

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To aim at the problem that the key space of DES is too small to prevent exhaust attacks, an expanding key space method is proposed and a chaotic transformed DES algorithm is constructed.

针对DES密钥空间过小而不能抵抗穷举攻击的问题，本文给出了一种基于混沌映射的密钥空间拓展方法，从而构造了一种混沌变形DES算法。

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