Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Train Formation Plan with Elastic Capacity for Large-Scale Rail
  Networks   This paper studies the problem of optimizing the train formation plan and
traffic routing (TFP&TR) simultaneously. Based on the previous research of
TFP&TR with determinate parameters, we consider the fluctuation of flows and
associate the elastic features of yard capacities and link capacities. To
demonstrate such elastic peculiarities, the fuzzy theory is introduced and the
membership function is designed to designate the satisfaction degree for the
volumes of traffic flows. A non-linear integer programming model is developed
considering various operational requirements and a set of capacity constraints,
including link capacity, yard reclassification capacity and the maximal number
of blocks a yard can be formed, while trying to minimize the total costs of
accumulation, reclassification, and transportation.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg