av影音先锋,老板办公室脱美女衣服,亚洲国产精品久久久久婷婷图片,freezeframe丰满寡妇

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:2371

    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.

 

国产50部艳色禁片无码| 中文天堂资源在线WWW| 天天躁日日躁狠狠躁免费麻豆| 极品少妇被黑人白浆直流| 握住校花两团雪乳高h| 啊灬啊灬啊灬快灬深用力| 18无码粉嫩小泬无套在线观看| 69xxxxxxxxx68| 欧美69久成人做爰视频| 国产spa盗摄xo在线观看| 医院人妻闷声隔着帘子被中出| 在电影院里拨开内裤挺进| 国产精品久久久久无码av| 久久久久免费毛a片免费| 波多野结衣在线播放| 日本a片无码中文字幕电影| 十大免费软件不收费软件| 大陆极品少妇内射AAAAAA| 久久亚洲熟女cc98cm| 国模杨依粉嫩蝴蝶150p| 精品人妻无码专区在线视频 | 欧美日韩精品乱国产| 极品熟妇大蝴蝶20p| 国产A级毛片| 俺去俺来也在线www色官网| 亚洲日韩精品一区二区三区| 色综合AV综合无码综合网站| 国产激情久久久久影院老熟女免费| 精品人妻人人做人人爽| 亚洲A∨国产AV综合AV| 免费xxxx大片| 亲嘴扒胸摸屁股激烈网站| 一女三男做2爱a片免费| 熟妇内谢69xxxxxa片| 人人妻人人澡人人爽欧美精品| 国产精品毛片无遮挡高清| 97久久精品人人澡人人爽| 国产超a级动作大片中文字幕| 成人片黄网站色大片免费观看cn| 用舌头去添高潮无码视频 | yw尤物av无码国产在线观看|