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Assessment of some physical properties of dried potatoes CIGR Journal
Hafezi, Negar; Sheikhdavoodi, Mohammad Javad; Sajadiye, Seyed Majid.
The effect of drying behaviour on the drying rate and quality characteristics of potato slices in a vacuum-infrared drying system was studied. In this research, the effect of the infrared radiation powers (100, 150, and 200 W) and vacuum levels (20, 80, 140 mmHg and atmosphere pressure) at different slice thickness (1, 2 and 3 mm) on drying rate and shrinkage percentage and rehydration capacity were investigated.  It was concluded that infrared radiation power amount has a significant effect on processing time and drying rate. With increasing radiation power, drying time is reduced and consequently drying rate is increased. The drying rate curve of potato slices at initial drying time is in the ascending phase because of surface moisture evaporation and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Potato; Drying rate; Vacuum; Infrared radiation; Shrinkage; Rehydration.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3583
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Operations scheduling of sugarcane production using fuzzy GERT method (part II: preserve operations, harvesting and ratooning) CIGR Journal
Monjezi, Nasim; Sheikhdavoodi, Mohammad Javad; Zakidizaji, Hasan; Marzban, Afshin; Shomeili, Mahmood.
This paper presents a GERT method based on fuzzy theory for solving fuzzy project scheduling of sugarcane production (preserve operations, harvesting and rationing) in Khuzestan province of Iran. In this method, activity duration time and loops, repetition number, and output activities from nodes of network belong to a fuzzy set. First, an analytical approach was proposed to simplify the structure of network. Then, GERT network computations were done based on evaluating nodes. Process outputs were scheduled network and project fuzzy completion time. These outputs were fuzzy numbers and can be analyzed by α- cut. Results prove that the method of using fuzzy numbers and fuzzy relation in project scheduling is a powerful tool to estimate time for agricultural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Scheduling; Sugarcane; GERT; Fuzzy.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3543
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Study on Shrinkage Characteristic of Potato Slices Based on Computer Vision CIGR Journal
Hafezi, Negar; Sheikhdavoodi, Mohammad Javad; Sajadiye, Seyed Majid; Arkiyan, Amir Hossein.
Shrinkage during drying plays an important role in determining the quality of the dried product. The aim of this study is to use image processing technique for measuring the variation of potato shape parameters during drying process. A standardized image acquisition system consisting of a digital camera, illumination, computer hardware and software was developed to capture and process images. During drying process, parameters related to shape (surface area of slice) decreased with drying time. The percentage of area reduction, which is obtained by detecting potato slices area before and after drying, can be used to realize the shrinkage characteristic of potato slices. Results showed that factors such as slice thickness and infrared radiation power...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Potato; Drying; Vacuum; Infrared Radiation; Shrinkage; Computer imaging.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3235
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