The hot deformation behavior of a typical martensitic stainless steel containing 2.1% Ni was investigated by means of the compression test in the strain rate range of 0.001-1 s-1 and temperature range of 950-1150 °C. The flow behavior of the steel was evaluated using the flow stress curves and flow softening map and by microstructural investigation. Taking into account of the strain effect on t...

Zygophyllum atriplicoides is one of the important species of Iran rangelands that has special importance owing to some properties like high distribution rate, coverage percentage, density, and plant biomass that make it possible to supply a part of forage needed by livestock during spring and winter as well as to avoid soil degradation against water and wind erosions. This research tries to stu...

We introduce a new concept of unbounded solutions to the operator Riccati equation A1X − XA0 − XV X + V ∗ = 0 and give a complete description of its solutions associated with the spectral graph subspaces of the block operator matrix B = ( A0 V V ∗ A1 ) . We also provide a new characterization of the set of all contractive solutions under the assumption that the Riccati equation has a contractiv...

In this paper, Φ-pseudo-contractive operators and Φ-accretive operators, more general than the strongly pseudo-contractive operators and strongly accretive operators, are introduced. By setting up a new inequality, authors proved that if → : T X X is a uniformly continuous Φ-pseudo-contractive operator then T has unique fixed point q and the Mann iterative sequence with random errors approximat...

Intuitive navigation is extremely important for the exploration of virtual environments. The best navigation is available in computer games, where it is mandatory that the player can control the movements of his avatar quickly and with a steep learning curve. Such intuitive navigation requires collision detection. In this paper we present a system that performs a very fast and robust collision ...

In this article, we further consider the above system. In particular, we give a sufficient condition under which the above system is Kato chaotic for $eta=0$ and a necessary condition for the above system to be Kato chaotic for $eta=0$. Moreover, it is deduced that for $eta=0$, if $Theta$ is P-chaotic then so is this system, where a continuous map $Theta$ from a compact metric space $Z$ to itse...

The following propositions are true: (1) Let S, T be non empty relational structures and f be a map from S into T. Suppose f is one-to-one and onto. Then f · f −1 = id T and f −1 · f = id S and f −1 is one-to-one and onto. (2) Let X, Y be non empty sets, Z be a non empty relational structure, S be a non empty relational substructure of Z [: X,Y :] , T be a non empty relational substructure of (...

With these definitions, the squaring map σ is seen to have the equivariance σ ( g z ) = ρ(g) ( σ(z) ) for all g in Spin(10, 1) and all z ∈ O. With these definitions, the polynomial p has the expression p(z) = − 14σ(z) ·σ(z), from which its invariance is immediate. Moreover, it follows from this that the squaring map carries the orbits of Spin(10, 1) to the orbits of SO↑(10, 1) and that the imag...

The normal map has proven to be a powerful tool for solving generalized equations of the form: find ; £ C, with 0 e F{z) + NiAz). where C is a convex set and Nr(z) is the normal cone to C at ;. In this paper, we use the 7"-map, a generalization of the normal map, to solve equations of the more general form: find : E dom(r), with 0 ^ E(z) + T(z). where T is a maximal monotone multifunction. We p...

Inaccurate depth map discontinuities are an important source of artifact and distortion in multiview systems and applications requiring depth-based view rendering such as 3DTV or free-viewpoint video. Such errors along depth discontinuities frequently occur during depth estimation and/or depth map coding. In this paper we present a novel method for correcting inaccuracies on the discontinuities...