projection variance 中文意思是什麼

projection variance 解釋
總體方差
  • projection : n 1 射出,投擲,發射,噴射。2 投射;投影,投影法;(地圖)投影圖製法;【電影】放映。3 凸出;凸出...
  • variance : n. 1. 變化,變動,變更;變度,變量;【統計】(平)方(偏)差。2. (意見等的)相異;不和,沖突,爭論。3. 【法律】訴狀和供詞的不符。
  1. In chapter 3 we analyze a useful statistical method - projection pursuit ( pp ), including its basic theory and application. we put out definitions of projection index and projection pursuit, then prove that pca is a special case of pp with sample variance as projection index and list some indices often used. in section 3. 3 we apply pp with information divergence index to hyperspectral image, and demonstrate the advanced ability of it by the comparison between it and pca

    第三章圍繞一種新興的統計降維方法? ?投影尋蹤展開討論,概述投影尋蹤的一般理論,定義了投影指標和投影尋蹤的概念,證明了傳統的主成分分析方法是投影尋蹤的一個特例,證明了正態性與friedman指標為0的等價性;第三節針對高光譜圖像處理問題,從實例和理論兩個方面,論證了以信息散度為指標的投影尋蹤方法在提取信息的能力上優于以方差大小作為衡量信息量多少標準的主成分分析方法。
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