ORA-54621: TO_GEOMETRY: TOTAL_DIMENSIONALITY not same as in INIT operation
文档解释ORA-54621:TO_GEOMETRY:TOTAL_DIMENSIONALITYnotsameasinINIToperationCause:ThespecifiedTOTAL_DIMENSIONALITYwasinvalid.Action:EnsurethattheTOTAL_DIMENSIONALITYm...
ORA-13239: sdo_dimensionality not specified during n-d R-tree creation
文档解释ORA-13239:sdo_dimensionalitynotspecifiedduringn-dR-treecreationCause:AnerroroccurredinreadingthedimensionalityparameterAction:Checkthedocumentationforavalid...
ORA-13364: layer dimensionality does not match geometry dimensions
文档解释ORA-13364:layerdimensionalitydoesnotmatchgeometrydimensionsCause:Thespatiallayerhasageometrywithadifferentdimensionsthanthedimensionsspecifiedforthelayer.Ac...
【神经网络】Reducing the Dimensionality of Data with Neural Networks
用神经网络来降维、之前降维用的方法是主成分分析法PCA，找到数据集中最大方差方向。（附：降维有助于分类、可视化、交流和高维信号的存储）这篇paper提出了一种非线性的PCA 的推广，通过一个小的中间层来重构高维输入向量，训练一个多层神经网...
