In this research, an accurate optimization model, based on the Six Sigma methodology was used in order to assists marine container terminal operators to minimize trucks congestions. to smooth gate activity and to shorten trucks turn-around times. The main purpose of this paper is to report findings of implementing the Six Sigma in the landside of marine container terminals to reduce the average...

Let $varphi(z)=z^m, z in mathbb{U}$, for some positive integer $m$, and $C_varphi$ be the composition operator on the Bergman space $mathcal{A}^2$ induced by $varphi$. In this article, we completely determine the point spectrum, spectrum, essential spectrum, and essential norm of the operators $C^*_varphi C_varphi, C_varphi C^*_varphi$ as well as self-commutator and anti-self-commutators of $C_...

In this paper, the special attention is given to the  product of two  modular operators, and when at least one of them is EP, some interesting results is made, so the equivalent conditions are presented  that imply  the product of operators is EP. Also, some conditions are provided, for which the reverse order law is hold. Furthermore, it is proved  that $P(RPQ)$ is idempotent, if $RPQ$†</...

we study the notion of harmonicity in the sense of symplectic geometry, and investigate the geometric properties of harmonic thom forms and distributional thom currents, dual to different types of submanifolds. we show that the harmonic thom form associated to a symplectic submanifold is nowhere vanishing. we also construct symplectic smoothing operators which preserve the harmonicity of distri...

A probabilistic interpretation is constructed for the symmetry group G of the finite differencedifferential equation ∂tη(x, t) = η(x, t) − η(x+ 1, t) using the Doob transform for Markov (jump) processes. While the first three generators of G correspond to the identity and to space and time shifts, we show that in this interpretation the fourth generator of G is associated to time dilations and ...

so that the creation operator is separated from the annihilation one. Later, we will also need the concept of normal order ; so let us define the normal ordering symbol N() to place whatever operators in normal order, for example N ( a(p)a(k)†a(q) ) ≡ a(k)†a(p)a(q) . (4) The meaning of the “time–ordering” symbol T is well known: it instructs us to place the operators that follow in order with t...

The present study is an attempt to propose a mutation-based real-coded genetic algorithm (MBRCGA) for sizing and layout optimization of planar and spatial truss structures. The Gaussian mutation operator is used to create the reproduction operators. An adaptive tournament selection mechanism in combination with adaptive Gaussian mutation operators are proposed to achieve an effective search in ...