近紅外光譜法定性描述酵母菌的生長(zhǎng)過(guò)程
發(fā)布時(shí)間:2019-04-19 07:26
【摘要】:提出了一種基于近紅外光譜分析技術(shù)的酵母菌生長(zhǎng)過(guò)程描述方法。利用AntarisⅡ型傅里葉變換近紅外光譜儀獲取酵母菌培養(yǎng)過(guò)程中,發(fā)酵物樣本在10000~4000 cm~(-1)范圍內(nèi)的光譜數(shù)據(jù),同時(shí)采用光電比濁法測(cè)定各樣本的光密度(Optical density,OD)值;運(yùn)用競(jìng)爭(zhēng)性自適應(yīng)重加權(quán)采樣(Competitive adaptive reweighted sampling,CARS)算法優(yōu)選特征光譜,再利用極限學(xué)習(xí)機(jī)(Extreme learning machine,ELM)建立酵母菌生長(zhǎng)過(guò)程4個(gè)階段的分類模型。研究結(jié)果顯示,參與CARS-ELM模型建立的波長(zhǎng)個(gè)數(shù)為30,其10次運(yùn)行在訓(xùn)練集和測(cè)試集中的平均識(shí)別率分別為98.68%和97.37%。研究結(jié)果表明,利用近紅外光譜分析技術(shù)結(jié)合適當(dāng)?shù)幕瘜W(xué)計(jì)量學(xué)方法描述酵母菌生長(zhǎng)過(guò)程是可行的。
[Abstract]:A description method of yeast growth process based on near infrared spectroscopy (NIR) was proposed. In the process of yeast culture, the spectral data of fermentation samples in the range of 10 000 脳 4 000 cm~ (- 1) were obtained by using Antaris 鈪,
本文編號(hào):2460740
[Abstract]:A description method of yeast growth process based on near infrared spectroscopy (NIR) was proposed. In the process of yeast culture, the spectral data of fermentation samples in the range of 10 000 脳 4 000 cm~ (- 1) were obtained by using Antaris 鈪,
本文編號(hào):2460740
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