Search results: 215 results (approx.)

1. The effect of compression ratio and alternative fuels on the performance of turbocharged diesel engine by GT-POWER software.

In this research, a one-dimensional computational fluid dynamics solution with GT-Power software was used to simulate a six-cylinder diesel engine to study the performance and exhaust emissions with different compression ratios and alternative fuels. The compression ratio was chosen to be 15:1 to...

Author(s) : Ahmadipour, S.; Aghkhani, M. H.; Zareei, J.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa199-fa212 ref.24

2. Studying some pollutant emissions of an injection gasoline engine using mixed fuel of ethanol, gasoline and carbon nanoparticles.

This paper evaluated the effect of mixture of ethanol with gasoline and carbon nanotubes on emission characteristics using Jatropha biodiesel in a compression in a spark ignition engine. In this study five levels of ethanol (0, 10, 20, 30 and 40%) and three levels of carbon nanoparticles (0, 20 and ...

Author(s) : Mohammadi, M. M.; Rahnama, M.; Mehdizadeh, S. A.; Kazemi, N.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa213-fa230 ref.36

3. Numerical study of wheat conveying in separator cyclone using computational fluid dynamics.

Computational Fluid Dynamics (CFD) is a diversified tool for predicting flow behavior in a wide range of design and operational conditions. Numerical solution of Navier-Stokes equations is the basis of all CFD techniques, which are the result of fast computer upgrades and a better understanding of...

Author(s) : Dizajyekan, S. N.; Shahgholi, G. H.; Fanaei, A. R.; Rostampour, V.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa231-fa246 ref.18

4. Ventilation and cooling modeling and layout of fans, pads and vents of an octagonal greenhouse.

The aim of this study is to layout the fans, pads and vents to provide best air flow in an octagonal greenhouse. In this study, three layouts of evaporative pad and fan systems and vents (1- fans on the roof of the pyramids and vents on the wall of the pyramids; 2- pads and fans on the greenhouse...

Author(s) : Moghaddam, J. J.; Zarei, G.; Momeni, D.; Azadshahraki, F.; Ozlati, S.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa247-fa262 ref.many

5. Greenhouse mobile robot navigation using wheel revolution encoding and learning algorithm.

Repetitive and dangerous tasks such as harvesting and spraying have made robots usable in the greenhouses. The mechanical structure and navigation algorithm are two important parameters in the design and fabrication of mobile greenhouse robots. In this study, a four- wheel differential steering...

Author(s) : Heidari, A.; Parian, J. A.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.1-15 ref.35

6. Prediction of seed flow rate of a multi-slot rotor feeding device of a corn planter.

In this study, a model was developed for predicting the seeding rate of corn seeds of a typical row-crop planter equipped with a multi-slot feeding device. To this, nine multi-slot rotors (with 4, 5 and 6 slots in three angles of mouth including 23°, 25° and 27°) were designed and manufactured....

Author(s) : Balanian, H.; Karparvarfard, S. H.; Khaneghah, A. M.; Raoufat, M. H.; Azimi-Nejadian, H.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.17-27 ref.19

7. Evaluating histogram equalization and thresholding methods for segmentation of rosa damascena flowers in color images.

Several histogram equalization methods for enhancing the color images of Rosa Damascena flowers and some thresholding methods for segmentation of the flowers were examined. Images were taken outdoors at different times of day and light conditions. A factorial experiment in the form of a Completely...

Author(s) : Kohan, A.; Minaei, S.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.29-42 ref.35

8. Effect of fragmentation of land on agricultural mechanization development using AHP technique.

The agricultural sector is in need of a rapid transition from traditional and livelihoods to the stage of advanced production and commercialization, in order to provide food security for the community and to play an effective role in strengthening national independence. Mechanization is an approach ...

Author(s) : Gavgani, M. S.; Zamani, D. M.; Par-Shokohi, M. G.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.43-53 ref.17

9. Effect of pomegranate seed oil encapsulated in chitosan-capric acid nanogels incorporating thyme essential oil on physicomechanical and structural properties of jelly candy.

Pomegranate seed oil (PSO) is a well-known source of valuable compounds. The aim of this study was to investigate physicomechanical and structural properties of jelly candy enriched with PSO encapsulated in chitosan (CS)-capric acid (CA) nanogel incorporating thyme essentioal oil (TEO). For this...

Author(s) : Moghaddam, H. M.; Rajaie, A.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.55-70 ref.43

10. Investigating the effects of qualitative properties on pears dielectric coefficient.

Nowadays, the dielectric properties of food and biological products have become a valuable parameter in foodstuff engineering and coating technology, covering a remarkable spectral domain from 10-6 to 1012. In the present study, 27 completely healthy pears were selected and subjected to...

Author(s) : Mahmoodi, M. J.; Azadbakht, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.71-81 ref.20

11. Degree-day index for estimating the thermal requirements of a greenhouse equipped with an air-earth heat exchanger system.

In this research, an attempt was made to utilize an Earth-Air Heat Exchanger (EAHE) system as a source of shallow geothermal energy to provide thermal demands of a commercial greenhouse located in Alborz province, Iran. The degree-day index was applied to estimate the EAHE system's potential to...

Author(s) : Faridi, H.; Arabhosseini, A.; Zarei, G.; Okos, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.83-95 ref.41

12. Investigating the energy consumption and economic indices for sweet-cherry and sour-cherry production in northeastern Iran.

The aim of this study was to investigate the energy consumption and production costs of sweet-cherry and sour-cherry in Northeastern Iran. Required data were collected from 75 sweet-cherry and 42 sour-cherry producers. The total energy inputs in sweet-cherry and sour-cherry production were...

Author(s) : Vahid-Berimanlou, R.; Nadi, F.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.97-110 ref.54

13. Economical assessment of replacing and refining methods of hydraulic oil of sugarcane harvesters in sugarcane cultivation industry of khuzestan.

Contamination due to hydraulic fluids exerts deleterious effects after a long time, however this factor is often ignored or its consecutive breakdowns and system failures are considered due to other factors. Therefore, in order to prevent the likelihood of occurring such problems, the following two ...

Author(s) : Abad, H. N. M.; Sheikhdavoodi, M. J.; Hazbavi, I.; Marzban, A.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.111-122 ref.14

14. Application of ms excel to estimate power needs of tillage tools.

This study deals with the application of the Microsoft Excel for the estimation of the power requirements of some tillage implements. The mathematical formulas embedded in the spreadsheet file have been developed in the previously published papers; however, those formulas were augmented herein in...

Author(s) : Ahmadi, I.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.1 pp.123-130 ref.20

15. Optimization effect of ultrasound on rupture force and kernel extracting quality of walnut using response surface method (RSM).

The objective of this study is to find the effect of ultrasound factors on the amount of walnut rupture force and quality of kernel extraction. The results indicated that the loading speed, ultrasound time duration, loading direction, and moisture content had a high significant effect (P<0.01)...

Author(s) : Agdam, E. B.; Khoshtaghaza, M. H.; Najafi, G. H.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa331-fa342 ref.22

16. Applying adaptive neuro-fuzzy inference system and artificial neural network to the prediction of quality changes of hawthorn fruit (Crataegus pinnatifida) during various storage conditions.

The purpose of this study was to predict the color, physical and mechanical properties of hawthorn fruit (Crataegus pinnatifida) during storage condition using artificial neural networks (ANNs) and adaptive network-based fuzzy inference system (ANFIS). Experimental data obtained from fruit storage, ...

Author(s) : Zandi, M.; Ganjloo, A.; Bimakr, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa343-fa357 ref.40

17. Modeling grain losses in mechanized harvesting of oily sunflower.

This paper investigated the head losses and grain losses for the inner section of the combine during mechanized harvesting of oily sunflower and a regression model was used based on the experimental tests. The tests were implemented in an oily sunflower farm by a combine harvester (1055 john deer)...

Author(s) : Ghiasi, P.; Safari, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa399-fa408 ref.20

18. Challenges and opportunities in development of agricultural mechanization in Ahvaz county using SWOT method.

The main purpose of this study is to use SWOT analysis to determine the best strategic planning for agricultural mechanization development in Ahvaz, Khuzestan. SWOT matrix was calculated based on internal and external factors evaluation matrices. Analyzing the matrix of external factors evaluation...

Author(s) : Moradi, N.; Asakereh, A.; Davoodi, M. J. S.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2021 Vol.11 No.2 pp.fa535-fa548 ref.41

19. Design, fabrication and evaluation of a novel system for magnetic field application to the seeds- case study of onion seed.

Non-chemical treatments are an approach for improving seed germination. In order to evaluate the effects of the magnetic field application on onion seed germination and seedling growth indices, a quadrupole magnetic field system was designed and fabricated. It was also compared with a dipole...

Author(s) : Rezaei, S.; Dowlati, M.; Abbaszadeh, R.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.1-10 ref.19

20. An estimator for torque and draft force requirements of a new up-cut rotary tiller.

The aim of this study is to design, fabricate and evaluate a new type of up-cut rotary tiller and to develop correct formulas to estimate its torque and draft force using the laws of classical mechanics. In order to verify the model, a real-sized prototype of the rotary tiller was tested. It was...

Author(s) : Ahmadi, I.; Beigi, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.11-21 ref.7

21. Feasibility of drone imagery for monitoring performance of a modified drill in a conservation farming system.

In this paper, performance of a no-till corn planter in a soil covered with previous wheat residue was evaluated. Three levels of crop residue cover (CRC): 30, 45 and 60%, two planting schemes; on-bed and in-furrow and two forward speed: (4 and 8 km h-1) were considered as treatments. The field was ...

Author(s) : Kavoosi, Z.; Raoufat, M. H.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.23-35 ref.24

22. Comparison of the laser backscattering and digital imaging techniques on detection of a-solanine in potatoes.

The overall objective of this research is to check the abilities of two non-destructive techniques, the digital imaging (DI) and laser light backscattering imaging (LLBI), on detection of α-solanine toxicant in potatoes. Potato samples were classified in healthy and toxic categories based on the...

Author(s) : Babazadeh, S.; Moghaddam, P. A.; Sabatyan, A.; Sharifian, F.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.49-58 ref.17

23. Optimization of refinement operations of sugarcane harvester hydraulic oil.

The purpose of this study was to model and optimize the offline refinement operations of sugarcane harvester hydraulic oil using RSM. For this purpose, the effects of independent variables of operating hours (250, 500 and 750 hours), Twin Dip Filter Mesh (7, 9 and 11 microns) and hydraulic oil...

Author(s) : Abad, H. N. M.; Sheikhdavoodi, M. J.; Hazbavi, I.; Marzban, A.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.59-72 ref.20

24. ANN-based modeling of sunflower threshing process and defining the optimal operation point for separation efficiency.

Harvesting is one of the most important field operations in sunflower production. Seed damage and low separation efficiency are the top concerns of harvesting sunflower. In this study, a threshing cylinder with rubber teeth and a concave for harvesting sunflower were designed and evaluated. The...

Author(s) : Ghiasi, P.; Masoumi, A.; Hemmat, A.; Najafi, G.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.73-82 ref.19

25. The numerical simulation of rebound velocity pendulum method for ripening detection of melon.

A robust numerical analysis was proposed for simulating the rebound velocity pendulum method for melon. For considered varieties (Zard-Eyvanekey and Sousky-Sabz varieties), the change in impact parameters (extracted from excitation by pendulum) was studied for five stages of ripening. With the...

Author(s) : Khoshnam, F.; Namjoo, M.

Publisher : Ferdowsi University of Mashhad, Mashhad, Iran

Journal article : Journal of Agricultural Machinery 2020 Vol.10 No.1 pp.83-92 ref.19