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农化研究中一个重要的田间采样分析问题的研讨 被引量:1
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作者 戚邦华 印天寿 《安徽农业科学》 CAS 1997年第2期140-141,155,共3页
经研究发现,农化研究中田间采样分析问题是一个非常重要的问题,对提高研究效果,节省时间、劳力,降低成本有重要作用。笔者提出了解决问题的研究方法与实例。
关键词 田间采样 分别采样 混合采样 农业化学
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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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