A few principal components, which were irrelated with each other and in accordance with the demand of feature optimization, were used as the inputs of BP neural network to identify the bats.

• 提取少数几个主成分,这些主成分彼此不相关,符合特征优化的要求，以主成分向量作为BP神经网络的输入对蝙蝠的种类进行识别。