Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Overview and Introduction to Development of Non-Ergodic Earthquake
  Ground-Motion Models   This paper provides an overview and introduction to the development of
non-ergodic ground motion models, GMMs. It is intended for a reader who is
familiar with the standard approach for developing ergodic GMMs. It starts with
a brief summary of the development of ergodic GMMs and then describes different
methods that are used in the development of non-ergodic GMMs with an emphasis
on Gaussian Process (GP) regression, as that is currently the method preferred
by most researchers contributing in this special issue. Non-ergodic modeling
requires the definition of locations for the source and site characterizing the
systematic source and site effects; the non-ergodic domain is divided in cells
for describing the systematic path effects. Modeling the cell-specific
anelastic attenuation as a GP, and considerations on constraints for
extrapolation of the non-ergodic GMMs are also discussed. An updated unifying
notation for non-ergodic GMMs is also presented, which has been adopted by the
authors of this issue.

33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph