the effective factors of forward speed, cylinder rotation, and clearance between a combine’s cylinder and concave on wheat kernel breakage and seed germination were studied in karaj area using a 955 model john dear combine. this study was conducted on three levels of adjustment for each of the variables, 1.2, 1.8 and 2.5 km/hr for forward speed, 800, 900, 1000 rpm for cylinder rotation as well ...

An adaptive matrix inverse (AMI) method is presented to identify the temperature and unknown boundary heat flux in a domain of regular or irregular shape with temperature-dependent properties. The nonlinear problem broken down into number linear submodels, for each submodel, obtained measuring points. Next, based on matching degree between temperatures measured calculated by prediction submodel...

The internal pressure of a thin-walled cylindrical structure under axial compression may improve the buckling stability by relieving loads and reducing initial imperfections. In this study, effect on knockdown factor is investigated for axially compressed composite cylinders with different shell thickness ratios slenderness ratios. Various are considered when derived both pressure. Nonlinear po...

To solve the problem of tension stress caused by centrifugal force and high-speed operation permanent magnet (PM) rotor, a FeCo-based PM rotor structure model is proposed. Based on thick-walled cylinder theory, uniform analytical calculation formulas strain field, displacement field are derived, stresses sleeve obtained. The correctness method (ACM) verified finite element (FEM). derived formul...