论文标题

多层随机顺序吸附

Multilayer Random Sequential Adsorption

论文作者

Parida, Priyabrata, Dhillon, Harpreet S.

论文摘要

在这项工作中,我们介绍了多层随机顺序吸附(RSA)过程的变体,该过程受到无线通信网络中正交资源共享的启发。在此变体的一维(1D)版本中,仅在分配两种不同的颜色时,才允许重叠杆的沉积,其中颜色象征着正交资源,例如频段,在通信网络中。由于不同颜色的沉积杆之间的强烈空间耦合,因此找到了给定颜色的沉积杆密度的精确溶液,这似乎是棘手的。因此,我们提出了两个有用的近似值,以获得给定颜色的杆的时变密度。第一个近似是基于对多层版本的杆密度的间接估计的已知单层RSA结果的递归使用。第二个近似值更准确但在计算上是密集的,涉及对间隙密度函数的时间演变的准确表征。此间隙密度函数随后用于估计给定颜色的棒密度。我们还考虑了此问题的二维(2D)版本,在该版本中,我们通过扩展为1D情况开发的第一个近似方法来估计给定颜色的时间变化圆的密度作为时间的函数。通过广泛的蒙特卡洛模拟验证了所有结果的准确性。

In this work, we present a variant of the multilayer random sequential adsorption (RSA) process that is inspired by orthogonal resource sharing in wireless communication networks. In the one-dimensional (1D) version of this variant, the deposition of overlapping rods is allowed only if they are assigned two different colors, where colors are symbolic of orthogonal resources, such as frequency bands, in communication networks. Owing to a strong spatial coupling among the deposited rods of different colors, finding an exact solution for the density of deposited rods of a given color as a function of time seems intractable. Hence, we propose two useful approximations to obtain the time-varying density of rods of a given color. The first approximation is based on the recursive use of the known monolayer RSA result for the indirect estimation of the density of rods for the multilayer version. The second approximation, which is more accurate but computationally intensive, involves accurate characterization of the time evolution of the gap density function. This gap density function is subsequently used to estimate the density of rods of a given color. We also consider the two-dimensional (2D) version of this problem, where we estimate the time-varying density of deposited circles of a given color as a function of time by extending the first approximation approach developed for the 1D case. The accuracy of all the results is validated through extensive Monte Carlo simulations.

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