絞り込み

17443

広告

核燃料再処理工場 今月中にも正式合格の見通し 原子力規制委 (NHK)

青森県にある再処理工場の本格操業の前提となる審査の正式合格を判断する時期について原子力規制委員会の更田豊志委員長は、15日の記者会見で「作業は順調に進んでいる。...

  1. 芥川賞に高山羽根子さんと遠野遥さん 直木...
  2. [企業] Medicago社の植物から作...
  3. 指原莉乃さん 出身の大分県などに義援金2...
  4. 芥川賞に高山羽根子さん「首里の馬」と遠野...

ニュース一覧

[Measurement of soil organic matter and available K based on SPA-LS-SVM].

著者 Zhang HL , Liu XM , He Y
Guang Pu Xue Yu Guang Pu Fen Xi.2014 May ; 34(5):1348-51.
この記事をPubMed上で見るPubMedで表示
この記事をGoogle翻訳上で見る Google翻訳で開く

スターを付ける スターを付ける     (3view , 0users)

Full Text Sources

Medical

Visible and short wave infrared spectroscopy (Vis/SW-NIRS) was investigated in the present study for measurement of soil organic matter (OM) and available potassium (K). Four types of pretreatments including smoothing, SNV, MSC and SG smoothing+first derivative were adopted to eliminate the system noises and external disturbances. Then partial least squares regression (PLSR) and least squares-support vector machine (LS-SVM) models were implemented for calibration models. The LS-SVM model was built by using characteristic wavelength based on successive projections algorithm (SPA). Simultaneously, the performance of LSSVM models was compared with PLSR models. The results indicated that LS-SVM models using characteristic wavelength as inputs based on SPA outperformed PLSR models. The optimal SPA-LS-SVM models were achieved, and the correlation coefficient (r), and RMSEP were 0. 860 2 and 2. 98 for OM and 0. 730 5 and 15. 78 for K, respectively. The results indicated that visible and short wave near infrared spectroscopy (Vis/SW-NIRS) (325 approximately 1 075 nm) combined with LS-SVM based on SPA could be utilized as a precision method for the determination of soil properties.
PMID: 25095436 [PubMed - indexed for MEDLINE]
印刷用ページを開く Endnote用テキストダウンロード