ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Rapid detection the content of chlorophyll a, chlorophyll b, β-carotene and lutein on fresh cucumber leaves by using hyper spectral image and high performance liquid chromatography (HPLC) was done. One hundred and twenty hyper-spectral images of cucumber leaves were collected by near infrared hyper-spectral camera, then using HPLC to accurate detect the content of chlorophyll a, chlorophyll b, β-carotene and lutein. After hyper-spectral images have been corrected, a 50×50 pixels region as region of interest (ROI) was defined. Average spectrum from ROI was extracted and prediction model of partial least squares (PLS) with the content of four pigments was built. In order to advance the stability and prediction accuracy, interval partial least squares(iPLS) , backwards interval partial least squares(BiPLS) and synergy interval partial least squares(SiPLS) algorithm was used to select diagnostic bands of each pigments after optimized the number of spectrum interval. The result showed that using BiPLS and SiPLS would get the best PLS model, the best prediction coefficient of chlorophyll a, chlorophyll b, β-carotene and lutein is 0.8257, 0.8134, 0.8116 and 0.8262, respectively.