Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reducing symmetry in topology optimization of two-dimensional porous
  phononic crystals   In this paper we present a comprehensive study on the multi-objective
optimization of two-dimensional porous phononic crystals (PnCs) in both square
and triangular lattices with the reduced topology symmetry of the unit-cell.
The fast non-dominated sorting-based genetic algorithm II is used to perform
the optimization, and the Pareto-optimal solutions are obtained. The results
demonstrate that the symmetry reduction significantly influences the optimized
structures. The physical mechanism of the optimized structures is analyzed.
Topology optimization combined with the symmetry reduction can discover new
structures and offer new degrees of freedom to design PnC-based devices.
Especially, the rotationally symmetrical structures presented here can be
utilized to explore and design new chiral metamaterials.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph