Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continuous surrogate-based optimization algorithms are well-suited for
  expensive discrete problems   One method to solve expensive black-box optimization problems is to use a
surrogate model that approximates the objective based on previous observed
evaluations. The surrogate, which is cheaper to evaluate, is optimized instead
to find an approximate solution to the original problem. In the case of
discrete problems, recent research has revolved around surrogate models that
are specifically constructed to deal with discrete structures. A main
motivation is that literature considers continuous methods, such as Bayesian
optimization with Gaussian processes as the surrogate, to be sub-optimal
(especially in higher dimensions) because they ignore the discrete structure
by, e.g., rounding off real-valued solutions to integers. However, we claim
that this is not true. In fact, we present empirical evidence showing that the
use of continuous surrogate models displays competitive performance on a set of
high-dimensional discrete benchmark problems, including a real-life
application, against state-of-the-art discrete surrogate-based methods. Our
experiments on different discrete structures and time constraints also give
more insight into which algorithms work well on which type of problem.

9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg