for the nonlinear analysis of structures using the well known newton-raphson method, the tangent stiffness matrices of the elements must be constructed in each iteration. due to the high expense required to find the exact tangent stiffness matrices, researchers have developed novel innovations into the newton-raphson method to reduce the cost and time required by the analysis. in this paper, a ...

The goal of this paper is to investigate the curves intersected by a vertical plane with surfaces based on certain NCP functions. convexity and differentiability these are studied as well. In most cases, inflection points cannot be expressed exactly. Therefore, we instead estimate interval where convex under situation. Then, help convexity, obtain local minimum or maximum accordingly. study ver...

In this paper, we discuss some necessary and sufficient conditions for a curve to be arithmetically Cohen-Macaulay, in terms of its general hyperplane section. We obtain a characterization of the degree matrices that can occur for points in the plane that are the general plane section of a non arithmetically Cohen-Macaulay curve of P. We prove that almost all the degree matrices with positive s...

In this paper we present a new active vision technique called zoom tracking. Zoom tracking is the continuous adjustment of a camera’s focal length, to keep a constantsized image of an object moving along the camera’s optical axis. Two methods for performing zoom tracking are presented: a closed-loop visual feedback algorithm based on opticaljlow, and use of depth information obtained from an au...

conditional monitoring is prerequisite to prevent severe damage or falling down the trees. problems such as trunk decays, reduces trees resistance against wind and floods. in this study, a mathematical modeling technique is being selected to determine the trees strength against such events. finally, an applicable model for safety factor was created by having numeral (dimensions of crown and tru...

The cross section for electron-induced proton knockout reactions with polarized beam and target is computed in a DWIA model. The analysis is focused on the electron helicity-dependent (HD) piece of the cross section. For the case of in-plane emission, a new symmetry is found in the HD cross section, which takes opposite values for specific opposing pairs of nuclear orientations, explaining why ...

to assessment alfalfa cultivars research project this research has been fulfilled in 2011 at khouzestan agricultural and natural resource research center in southwest of ahwaz in khouzestan province (iran) by position 31º20′ n, 48º40′ e. at first section for evaluation wet forage yield cultivars such as “baghdadi”, “mesasersa”, “yazdi”, “bami”, “nikshahri”, “synthetic” (main factor) and two cut...

Momentum considerations are used to derive relationships between the lifting efficieny of a wing having an attached shock system and properties of the flow field around it. Optimum two-dimensional flow fields are derived using shock expansion theory. These may be used to design three-dimensional shapes having slightly greater lifting efficiencies than plane wedges. An analysis of the flow in an...