數(shù)據(jù)集成文檔by文庫LJ佬2024-05-25CONTENTS數(shù)據(jù)集成概述數(shù)據(jù)預(yù)處理01數(shù)據(jù)集成概述數(shù)據(jù)集成概述數(shù)據(jù)集成意義提高數(shù)據(jù)共享效率。數(shù)據(jù)集成流程數(shù)據(jù)采集、數(shù)據(jù)清洗、數(shù)據(jù)轉(zhuǎn)換、數(shù)據(jù)加載。數(shù)據(jù)集成挑戰(zhàn)數(shù)據(jù)一致性、數(shù)據(jù)沖突、數(shù)據(jù)安全等問題。數(shù)據(jù)集成意義數(shù)據(jù)集成過程:

數(shù)據(jù)集成是將不同數(shù)據(jù)源的數(shù)據(jù)整合到一個(gè)統(tǒng)一的視圖中的過程。數(shù)據(jù)集成挑戰(zhàn):

數(shù)據(jù)格式、數(shù)據(jù)質(zhì)量、數(shù)據(jù)安全等問題。數(shù)據(jù)集成技術(shù):

ETL工具、API集成、數(shù)據(jù)同步等方法。數(shù)據(jù)集成流程步驟描述數(shù)據(jù)采集從不同數(shù)據(jù)源中提取數(shù)據(jù)。數(shù)據(jù)清洗處理數(shù)據(jù)中的錯(cuò)誤和不一致性。數(shù)據(jù)轉(zhuǎn)換將數(shù)據(jù)轉(zhuǎn)換為統(tǒng)一格式。數(shù)據(jù)加載將數(shù)據(jù)加載到目標(biāo)數(shù)據(jù)庫或數(shù)據(jù)倉(cāng)庫中。數(shù)據(jù)集成挑戰(zhàn)數(shù)據(jù)一致性:

確保數(shù)據(jù)在不同系統(tǒng)中保持一致性。數(shù)據(jù)沖突:

處理不同數(shù)據(jù)源中的沖突數(shù)據(jù)。數(shù)據(jù)安全:

保護(hù)數(shù)據(jù)在集成過程中的安全性。02數(shù)據(jù)預(yù)處理數(shù)據(jù)預(yù)處理數(shù)據(jù)預(yù)處理數(shù)據(jù)預(yù)處理意義：

提高數(shù)據(jù)質(zhì)量、減少模型訓(xùn)練時(shí)間。數(shù)據(jù)預(yù)處理流程：

數(shù)據(jù)清洗、數(shù)據(jù)轉(zhuǎn)換、數(shù)據(jù)規(guī)范化。數(shù)據(jù)預(yù)處理方法：

平均值填充、標(biāo)準(zhǔn)化、最大最小化等。數(shù)據(jù)預(yù)處理意義缺失值處理異常值處理數(shù)據(jù)標(biāo)準(zhǔn)化刪除、填充或插值處理缺失值。檢測(cè)和處理異常值，避免對(duì)模型的干擾。將數(shù)據(jù)轉(zhuǎn)換為相似的數(shù)值范圍。數(shù)據(jù)預(yù)處理流程數(shù)據(jù)預(yù)處理流程步驟描述數(shù)據(jù)清洗清除噪聲和處理缺失值。數(shù)據(jù)轉(zhuǎn)換對(duì)數(shù)據(jù)進(jìn)行編碼或轉(zhuǎn)換。數(shù)據(jù)規(guī)范化將數(shù)據(jù)縮放到相似的范圍。數(shù)據(jù)預(yù)處理方法平均值填充:

用均值替換缺失值。標(biāo)準(zhǔn)化:

將數(shù)據(jù)轉(zhuǎn)換為均值為0，方差為1的分布。