色戒电影未删减完整版免费观看,国产精品永久久久久久久久久,欧美日本免费一区二区三区,护士表妺好紧竟然流水视频

網(wǎng)站首頁技術(shù)中心 > 利用多光譜成像系統(tǒng)區(qū)分杭白菊栽培種和測定木犀草素含量
產(chǎn)品中心

Product center

利用多光譜成像系統(tǒng)區(qū)分杭白菊栽培種和測定木犀草素含量

更新時間:2018-06-12 點擊量:2145

    杭白菊是重要的可食用中藥,因其主要活性成份為木犀草素,其具有自由基清除和抗氧化性能,可改善健康。研究人員利用多光譜成像法進行了杭白菊栽培種區(qū)分和木犀草素含量測定的研究。支持向量機法( (LS-SVM))用來區(qū)分杭白菊栽培種。從樣品獲得的光譜學(xué)和形態(tài)學(xué)特征數(shù)據(jù)用做前三個主要成份(99.61%), LS-SVM模型在預(yù)測集的區(qū)分精度可達(dá)98%。另外,偏小二乘法PLS和 LS-SVM 用于預(yù)測木犀草素含量,預(yù)測結(jié)果Rp分別為 0.949和0.965; RMSEP 分別為0.387和0.314 mg g−1。所有結(jié)果顯示,將MSI多光譜成像技術(shù)與化學(xué)計量法結(jié)合的方法,可能是一種快速、無損區(qū)分杭白菊栽培種和測定木犀草素含量的有效方法。該文章利用了VideometerLab 多光譜測量系統(tǒng)進行了研究。
   
Chrysanthemum morifolium Ramat. (Chr) is a notable medicinal and edible crop that stimulates health owing to its radical-scavenging and antioxidant properties due to its main active flavonoid luteolin. The performance of discriminating between Chr c*rs and determining luteolin content in Chr using multispectral imaging (MSI) was investigated. A combination of MSI with principal component analysis (PCA) and least squares-support vector machines (LS-SVM) was applied to classify Chr c*rs. PCA derived from the spectral and morphological features data of the samples explained 99.61% for summing up the first three principal components and the LS-SVM model achieved 98% discrimination accuracy in the prediction set. Additionally, partial least squares (PLS) and LS-SVM models were obtained to predict performance for luteolin content determination, with Rp of 0.949 and 0.965, and RMSEP of 0.387 and 0.314 mg g−1, respectively. All results demonstrated that the combination of MSI system with chemometrics methods could be a rapid and non-destructive method to discriminate between Chr c*rs and determine luteolin content in Chr.

 

人妻夜夜爽天天爽三区丁香花 | 亚洲一区二区三区日本久久九| А中文在线天堂| 久久人人爽天天玩人人妻精品| 国产伦精品一区二区三区妓女| 高中浪荡女挨CAO日常| 性色AV蜜臀AV色欲AV| 重囗味SM在线观看无码| 亚洲午夜无码久久久久| 亚洲国产精品成人综合色在线| 国内露脸少妇精品视频| jizzjizz日本高潮喷水| 99热最新地址| 激情综合色五月丁香六月欧美 | 国产精品久久久久久久久久妞妞 | 国产精品99亚发布| 黑人猛挺进小莹的体内视频| 国产精品久久久久久久久无码| 人善交XUANWEN200| 国精产品一区二区三区有限公司| 欧美极品jizzhd欧美| 欧美人体艺术网| 性久久久| 男人的又粗又长又硬有办法吗| 少妇大荫蒂被巨大爽爽大| 国产香蕉尹人视频在线| 久久久久久久久久| 色情无码WWW视频无码区小黄鸭| 啊轻点灬大巴太粗太长了视频免费| 国产h视频在线观看| 欧美粗大猛烈18p| 高清VPSWINDOWS另类乱| 日本无码小泬粉嫩精品图| 奶头被教练摸得受不了| 夜精品A片一区二区三区无码白浆| 亚洲精品在线观看| 欧美人禽性动交异族另类| 亚洲精品一区二区三区福利| 医生边走边吮男男H| 亚洲 中文字幕 日韩 无码| 色噜噜av亚洲色一区二区|