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.

 

上司人妻互换中文字幕| 处破女A片60分钟粉嫩免费观看| 凹凸精品熟女在线观看| 欧美交换国产一区内射| 与80岁老太做爰A片免费看| 67194熟妇在线播放直接进入| 996久久国产精品线观看| 成人网站免费看黄a站视频| 国产猛男gaygayxxgv| 少妇大荫蒂被巨大爽爽大| 宝贝几天没C你了好爽菜老板| 中文在线っと好きだった最新版| 草莓视频CAOMEI888| 在厨房拨开内裤进入毛片| 国产精品刮毛| 色狠狠久久AV五月综合| 色偷偷伊人大杳蕉综合网| 国产成人免费爽爽爽视频| 99久久久无码国产精品不卡 | 亚洲一区二区三区| 粗大猛烈进出高潮视频大全 | 亚洲 国产 日韩 在线 一区| 口述他进我身体全过程| 嫩草伊人久久精品少妇AV| 中国女人内谢69XXXXXA片| 扒开胸罩疯狂揉搓奶头| 久久久AV精品波多野结衣| 伊人久久综合热线大杳蕉岛国 | 日本最新男男gayjapan| 免费看高清大片的APP在线看| 中文字幕无码乱人伦| 亚洲 日韩 欧美 综合 热| 777久久精品一区二区三区无码| 精品久久久久久中文字幕大豆网| 亚洲av鲁丝一区二区三区| 无码精品视频一区二区三区| 玉女阁第一精品导航| 日韩GAY小鲜肉啪啪18禁| 亚洲精品无码专区在线| gogogo日本免费观看| 亚洲精品国偷拍自产在线|