Moisture content and bulk density prediction using dielectric properties for switchgrass and corn stover

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dc.contributor.advisor Stuart Birrell
dc.contributor.author Magalhães De Souza, Augusto César
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-08-11T13:12:28.000
dc.date.accessioned 2020-06-30T02:58:04Z
dc.date.available 2020-06-30T02:58:04Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2015
dc.date.embargo 2001-01-01
dc.date.issued 2015-01-01
dc.description.abstract <p>Dielectric measurements between 0.1 to 10 MHz were obtained using an HP 4192A impedance analyzer for switchgrass and corn stover. For each material, the measurements were obtained at four moisture content levels and three bulk densities. Dielectric properties of these materials could be calculated based on admittance readings and each variable was significant for dielectric constant and loss factor measurements. Dielectric variables were used to predict moisture content and bulk density for both materials. For switchgrass, moisture content was predicted with R2 = 0.94 and RMSE = 0.052%, while for density was predicted with R2 = 0.85 and RMSE = 0.0323 g/cm3. For corn stover, moisture content was predicted with R2 = 0.90 and RMSE = 0.0315%, whereas, for bulk density, the regression model had a R2 =0.87 and RMSE = 0.0068 g/cm3. The results indicated that dielectric measurements have good potential for predicting moisture content and bulk density although further investigation is required for a wider range of frequencies, moisture content, and bulk density levels.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/14631/
dc.identifier.articleid 5638
dc.identifier.contextkey 8049391
dc.identifier.doi https://doi.org/10.31274/etd-180810-4183
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/14631
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/28816
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/14631/MagalhaesdeSouza_iastate_0097M_15068.pdf|||Fri Jan 14 20:23:48 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Agricultural and Biosystems Engineering
dc.subject.keywords corn stover
dc.subject.keywords dielectric properties
dc.subject.keywords sensors
dc.subject.keywords switchgrass
dc.title Moisture content and bulk density prediction using dielectric properties for switchgrass and corn stover
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
thesis.degree.level thesis
thesis.degree.name Master of Science
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