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.

 

肉乳乱无码a片观看免费| 亚洲va久久久噜噜噜久久| 亚洲午夜av久久久精品影院| 粗大挺进尤物人妻中文字幕| 国产精品毛片一区二区| 日本三级片在线观看| 国内老熟妇对白hdxxxx| 同桌上课脱裙子让我帮他自慰| 亚洲妇女无套内射精| 99精品国产一区二区三区不卡| 亚洲中文字幕无码爆乳av| 日本av在线观看| 国产999精品久久久久久| 国产综合精品| 性一交—乱一性一A片在线播放| 东京无码熟妇人妻av在线网址| 女人与公拘交酡全过程| 欧美老熟妇乱子伦视频| 免费xxxx大片| 国模叶桐尿喷337p人体 | 天天狠天天透天干天天怕∴| 和少妇人妻邻居做爰无码| 国产乡下妇女做爰| 草色噜噜噜av在线观看香蕉| 一个人看www在线视频| 秋霞影院午夜伦a片欧美| 我和亲妺在客厅作爱| 国产欧美va欧美va在线观看| 亚洲精品~无码抽插| 欧美老妇与zozoz0交| 国产精品亚洲色婷婷99久久精品| 亚洲国产精品日韩AV不卡在线| 日本极品人妻videossex | 人人超碰人人爱超碰国产| babescom欧美熟妇| 国产真人无遮挡作爱免费视频 | 四虎影视永久地址www成人| 国产精品沙发午睡系列| 中文字幕人妻偷伦在线视频| 丰满白嫩大屁股ass| 日本极品人妻videossex |