کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6540666 | 158864 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of soluble solids content and firmness of pears during ripening by using dielectric spectroscopy
ترجمه فارسی عنوان
تعیین محتوای جامد محلول و استحکام گلابی در طی رسیدن با استفاده از طیف سنجی دی الکتریک
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کلمات کلیدی
گلابی، مجوزها، طیف دی الکتریک، محتوای جامد محلول استحکام،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
To investigate the feasibility of dielectric spectroscopy as a nondestructive technique in determining soluble solids content (SSC) and firmness of pears during ripening period, the dielectric constants and dielectric loss factors of 105 “Dangshansu” pears with different maturities were obtained at 201 discrete frequencies from 20Â MHz to 4500Â MHz with an open-ended coaxial-line probe and a vector network analyzer. The joint x-y distances sample set partitioning (SPXY) method was applied to divided all samples into calibration set (70 pears) and prediction set (35 pears). Nineteen and 13 characteristic variables were extracted for SSC and firmness, respectively, from the full dielectric spectra by using successive projection algorithm. The nonlinear model, i.e., least squares support vector machine, extreme learning machine (ELM) and generalized regression neural network, and linear models, i.e., multiple linear regression and partial least squares regression, were used to establish SSC and firmness determination models based on the full dielectric spectra and extracted characteristic variables by SPA. Results showed that SPA-ELM was the best model for SSC and firmness prediction, with the correlation coefficient and root-mean-square error of prediction set of 0.838 and 0.464 for SSC, and of 0.865 and 0.362 for firmness. The study indicates that dielectric spectroscopy combined with artificial neural network might be applied in developing portable SSC and firmness detectors of intact pears during on-tree ripening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers and Electronics in Agriculture - Volume 117, September 2015, Pages 226-233
Journal: Computers and Electronics in Agriculture - Volume 117, September 2015, Pages 226-233
نویسندگان
Wenchuan Guo, Lijie Fang, Dayang Liu, Zhuanwei Wang,