Template-Type: ReDIF-Article 1.0 Author-Name: Mahdi Rashvand Author-Workplace-Name: Department of Machine Design and Mechatronics, Institute of Mechanics, Iranian Research Organization for Science and Technology, Tehran, Iran Author-Name: Mahmoud Soltani Firouz Author-Workplace-Name: Department of Mechanics of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran Title: Dielectric technique combined with artificial neural network and support vector regression in moisture content prediction of olive Abstract: Olives are one of the most important agriculture crops in the world, which are harvested in different stages of growth for various uses. One of the ways to detect the adequate time to process the olives is to determine their moisture content. In this study, to determine the moisture content of olives, a dielectric technique was used in seven periods of harvesting and three different varieties of olive including Oily, Mary and Fishemi. The dielectric properties of the olive fruits were measured using an electronic device in the range of 0.1-30 MHz. Artificial Neural Network (ANN) and Support Vector Regression (SVR) methods were applied to develop the prediction models by using the obtained data acquired by the system. The best results (R = 0.999 and MSE = 0.014) were obtained by the ANN model with a topology of 384-12-1 (384 features in the input vector, 12 neurons in the hidden layer and 1 output). The results obtained indicated the acceptable accuracy of the dielectric technique combined with the ANN model. Keywords: capacitive sensor, data mining, estimation, quality factor Journal: Research in Agricultural Engineering Pages: 1-7 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/13/2019-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/13/2019-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-202001-0001.txt Handle: RePEc:caa:jnlrae:v:66:y:2020:i:1:id:13-2019-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Anežka Sedmihradská Author-Workplace-Name: Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic Author-Workplace-Name: Department of Power Engineering & Department of Gaseous and Solid Fuels and Air Protection, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: Michael Pohořelý Author-Workplace-Name: Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic Author-Workplace-Name: Department of Power Engineering & Department of Gaseous and Solid Fuels and Air Protection, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: Petr Jevič Author-Workplace-Name: Research Institute of Agricultural Engineering, p.r. Prague, Czech Republic Author-Name: Siarhei Skoblia Author-Workplace-Name: Department of Power Engineering & Department of Gaseous and Solid Fuels and Air Protection, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: Zdeněk Beňo Author-Workplace-Name: Department of Power Engineering & Department of Gaseous and Solid Fuels and Air Protection, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: Josef Farták Author-Workplace-Name: Department of Power Engineering & Department of Gaseous and Solid Fuels and Air Protection, Faculty of Environmental Technology, University of Chemistry and Technology Prague, Prague, Czech Republic Author-Name: Bohumír Čech Author-Workplace-Name: ENET Centre, Technical University of Ostrava, Ostrava, Czech Republic Author-Name: Miloslav Hartman Author-Workplace-Name: Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic Author-Workplace-Name: ENET Centre, Technical University of Ostrava, Ostrava, Czech Republic Title: Pyrolysis of wheat and barley straw Abstract: Pyrolysing agricultural crop residues and other biomass constitutes a newer method of transforming often difficult, waste materials into a novel type of soil amendment/additive. Simultaneously, this process also makes it possible to exploit part of the energy released in the agricultural production. Biochar, viewed as the solid product of biomass pyrolysis, is a remarkable, porous material, rich in carbon. Two agricultural crop residues, such as wheat and barley straw, were selected for the experimental studies. The results indicate that the practical temperature for the production of biochar from the two explored materials occurs in the vicinity of 600 °C. Starting at this temperature, the biochar produced complies safely with the principal European Biochar Certificate standards (EBC 2012). Thus, for the wheat straw and barley straw - originated char, the content of the carbon amounts to 67.2 and 67.0 mass %, the atomic ratio H : C is as large as 0.032 and 0.026, and the specific surface area amounts to 217 and 201 m2.g-1, respectively. Keywords: carbonization, thermolysis, biomass, biochar, crop residue Journal: Research in Agricultural Engineering Pages: 8-17 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/26/2019-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/26/2019-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-202001-0002.txt Handle: RePEc:caa:jnlrae:v:66:y:2020:i:1:id:26-2019-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Roman Hevko Author-Workplace-Name: Department of Management of Bioresources and Nature Management, Faculty of Agricultural Economics and Management, Ternopil National Economical University, Ternopil, Ukraine Author-Name: Roman Rohatynskyi Author-Workplace-Name: Department of Economic Cybernetics, Faculty of Economics and Management, Ternopil Ivan Pul'uj National Technical University, Ternopil, Ukraine Author-Name: Myroslav Hevko Author-Workplace-Name: Technical department, Jinova s.r.o., Czech Republic Author-Name: Oleg Lyashuk Author-Workplace-Name: Department Automobiles, Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Pul'uj National Technical University, Ternopil, Ukraine Author-Name: Oleksandra Trokhaniak Author-Workplace-Name: Department of Engineering Reliability, Faculty of Design and Engineering, National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine Title: Investigation of sectional operating elements for conveying agricultural materials Abstract: The paper covers the results of the theoretical and experimental investigation of the developed sectional operating element of a flexible screw conveyer designed for transporting bulk agricultural materials. In order to determine the correlation between the design parameters of the hinged screw sections and the minimum permissible radius of curvature of a processing line, the analytical dependences have been deduced. The results of the experimental studies aimed at determining the efficiency of a screw conveyer and the level of the grain material damage depending on the change in design, kinematic and technological parameters of an operating element are presented. Keywords: crew element, curvilinear line, conveyer efficiency, grain material damage, technological parameter Journal: Research in Agricultural Engineering Pages: 18-26 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/25/2019-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/25/2019-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-202001-0003.txt Handle: RePEc:caa:jnlrae:v:66:y:2020:i:1:id:25-2019-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Kancho Peychev Author-Workplace-Name: Department of Agricultural Engineering, Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria Author-Name: Galina Dineva Title: Study on the effect of the teat reaction on the time components of the pulsogram in various types of milking liners Abstract: The relationship between the milking process phases and the artificial teat reaction have been studied. Milking units with a conventional and tri-circle shape of the pulsation chamber were used. The conclusions are related to the reaction of the teat support and the changes of the time components in the pulsogram. The filling of the milking chamber with an artificial teat reduces the absolute duration of the transitional phases "a" and "c" and prolongs the actual phases "b" and "d" in all the experimental rates. Keywords: milking device, artificial teat, pulsation parameters Journal: Research in Agricultural Engineering Pages: 27-32 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/40/2019-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/40/2019-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-202001-0004.txt Handle: RePEc:caa:jnlrae:v:66:y:2020:i:1:id:40-2019-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Viktor Baranovsky Author-Workplace-Name: Ministry of Education and Science of Ukraine, Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Puluj National Technical University, Ternopil, Ukraine Author-Name: Olena Truhanska Author-Workplace-Name: Ministry of Education and Science of Ukraine, Faculty of Engineering and Technology, Vinnytsia National Agrarian University, Vinnitsa, Ukraine Author-Name: Maria Pankiv Author-Workplace-Name: Ministry of Education and Science of Ukraine, Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Puluj National Technical University, Ternopil, Ukraine Author-Name: Valentina Bandura Author-Workplace-Name: Ministry of Education and Science of Ukraine, Faculty of Engineering and Technology, Vinnytsia National Agrarian University, Vinnitsa, Ukraine Title: Research of a contact impact of a root crop with a screw auger Abstract: The purpose of this research is the further development of the methodology and methods of optimising the parameters of root pile combined cleaners of a root crop harvesting machine. We have conducted theoretical and experimental studies of the combined cleaning system's functioning process. By executing the analysis, we found the motion of the fodder beet through the working surfaces of the feeding conveyor and the auger installed above it. We have got an analytical and empirical process model for the fodder beet's oblique sub-hit on the auger turn. It characterises the dependence of the total rate of the sub-hit coefficient of the technological interaction of the roots and the depth of the root damage, which depend on the main parameters of the combined cleaning system. We found out the rational limits of the basic structural and kinematic parameters of the combined cleaning system by the provided minimum fodder beet damage. It is theoretically justified that the minimum damage to roots of the beet roots will be at a contact angle of zero (γ ≅ 0) or close to it. This condition is protected with the following combinations of parameters: a screw diameter of D = 0.4, 0.6, 0.8 m and a screw speed of n = 99, 72, 50 rpm, respectively. Keywords: cleaner, conveyor, koper, speed, coefficient Journal: Research in Agricultural Engineering Pages: 33-42 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/75/2017-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/75/2017-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-202001-0005.txt Handle: RePEc:caa:jnlrae:v:66:y:2020:i:1:id:75-2017-RAE