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.

 

去男朋友宿舍被室友4P| 久久亚洲精品无码| 粗大挺进朋友人妻淑娟| 国产在线| 国产精品久久免费观看勾搭 | 黑人粗大猛烈进出高潮视频 | 久久久久国產麻豆无碼av| 色欲AV午夜一区二区三区| 亚洲国产精品成人无码区| 精品无人区乱码1区2区3区| 久久久久黑人强伦姧人妻| 久久久久成人精品无码| 日本欧美大码一区二区免费看| 欧美xxxxx高潮喷水麻豆| 日本无遮挡真人祼交视频| 妓女嫖客叫床粗话对白| 最近免费中文字幕中文高清百度 | 无码任你躁久久久久久老妇| 故意穿暴露被强好爽H漫画 | 大又大又粗又硬又爽少妇毛片| 一女三黑人玩4P惨叫A片| 男人狂躁进女人免费视频vr| 精品久久久久久无码中文野结衣| 年轻护士的滋味中文字幕| 国产毛A片啊久久久久久| 啦啦啦资源视频在线观看8| 99久久国产露脸国语对白| 亚洲永久无码7777KKK| 久久99精品久久久久久动态图 | 少妇被躁爽到高潮无码人狍大战| 久久久久无码国产精品一区| 国产一性一交一伦一A片| 精品久久久无码中文字幕 | 含着她的花蒂啃咬高潮| 免费视频在线观看| av天堂午夜精品蜜臀av| 久久久精品人妻无码专区不卡 | 精品亚洲一区二区三区在线播放| 黑人刚破完处就三P| 一边摸一边做爽的视频17国产| 亚洲日韩精品一区二区三区|