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60W×2线性标准式电子管扩音机
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作者 松森 《实用无线电》 1996年第2期15-19,共5页
本期介绍的60W×2线性标准式电子管扩音机是在美国《无线电与电视新闻》上发表的。线性标准式放大器按照传统的电路结构,功率输出部分的功率电子管按照束射管的标准接法,图1为60W×2线性标准式放大器的电路图。
关键词 电子管扩音机 扩音机 线性标准式
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A novel face recognition method with feature combination 被引量:2
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作者 李文书 周昌乐 许家佗 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第5期454-459,共6页
A novel combined personalized feature framework is proposed for face recognition (FR). In the framework, the proposed linear discriminant analysis (LDA) makes use of the null space of the within-class scatter matrix e... A novel combined personalized feature framework is proposed for face recognition (FR). In the framework, the proposed linear discriminant analysis (LDA) makes use of the null space of the within-class scatter matrix effectively, and Global feature vectors (PCA-transformed) and local feature vectors (Gabor wavelet-transformed) are integrated by complex vectors as input feature of improved LDA. The proposed method is compared to other commonly used FR methods on two face databases (ORL and UMIST). Results demonstrated that the performance of the proposed method is superior to that of traditional FR ap- proaches 展开更多
关键词 Fisher discriminant criterion Face recognition (FR) Linear discriminant analysis (LDA) Principal component analysis (PCA) Small sample size (SSS)
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