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Maryam Amini

Publications and source records attributed to Maryam Amini.

2 recordsLinked to original sources

Explicit pore pre-conditioning and inverse design of amorphous nanoporous carbon

Porous carbons store energy, capture gases and purify water, and their performance depends strongly on the geometry of their pores. Atomistic models mostly simulate their synthesis by molecular dynamics, with results that depend on the interatomic potential, and return the pore network as an output rather than as a specification. Here we show that the pore network can be an input: pores drawn from a target size distribution fill a prescribed volume fraction, carbon is grown around them by stochastic ring placement, and a particle swarm recovers the construction parameters from a structural fingerprint. The search reproduces the density, surface area and pore volume of a carbon produced by quenched molecular dynamics within about 5 %, together with its pore size distribution. As a stress test, it also recovers a bimodal distribution, and the search history reveals which parameters the targets constrain and flags a failed search. A short anneal completes the network, recovering the coordination of the reference while the pore size distribution keeps its shape. Molecular dynamics still supplies the local chemistry, but the pore geometry becomes a design variable for a given application.

cond-mat.mtrl-sci↗

Performance Analysis and Comparison of Full-Fledged 5G Standalone Experimental TDD Testbeds in Single & Multi-UE Scenarios

Open-source software and Commercial Off-The-Shelf hardware are finally paving their way into the 5G world, resulting in a proliferation of experimental 5G testbeds. Surprisingly, very few studies have been published on the comparative analysis of testbeds with different hardware and software elements. In this paper, we first introduce a precise nomenclature to characterize a 5G-standalone single-cell testbed based on its constituent elements and main configuration parameters. We then build 30 distinct such testbeds and systematically analyze their performance with an emphasis on element interoperability (by considering different combinations of hardware and software elements from different sources), the number and type of User Equipment (UE) as well as the Radio Access Network hardware and software elements to address the following questions: 1) How is the performance (in terms of bit rate and latency) impacted by different elements? 2) How does the number of UEs affect these results? 3) What is the impact of the user(s)' location(s) on the performance? 4) What is the impact of the UE type on these results? 5) How far does each testbed provide coverage? 6) And finally, what is the effect of the computing resources available to each open-source software? This study focuses on TDD testbeds.

cs.NI↗