Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrowetting-Controlled Dropwise Condensation with Patterned
  Electrodes: Physical Principles, Modeling, and Application Perspectives for
  Fog Harvesting and Enhanced Heat Transfer
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph