Free-floating bike sharing is an innovative and sustainable travel mode, where shared bikes
can be picked up and returned at any proper place on the streets and not just at docking …

The outbreak of COVID-19 has caused a serious impact on the traditional logistics industry.
Considering that the truck-drone collaborative delivery system can both reduce the risk of …

In this paper, a new mixed steepest descent algorithm which has short computation time and
stable solution is provided. Comparisons and case studies based on different traffic network …

We decompose the linear ordering problem into a P and an NP-hard component by means
of the Fourier transform. That is, we prove that the objective function can be expressed as …

Solving combinatorial optimization problems efficiently requires the development of
algorithms that consider the specific properties of the problems. In this sense, local search …

This study investigates the analogy between the electric circuit and roadway traffic analyses
based on the loop-wise route representation (LRR). These two seemingly different fields …

Given a particular instance of a combinatorial optimization problem, the knowledge about
the attraction basin sizes can help to analyze the difficulty encountered by local search …

The performance of local search algorithms is influenced by the properties that the
neighborhood imposes on the search space. Among these properties, the number of local …

Assessing the hardness of combinatorial optimization problem instances is not a trivial task.
Although it is easy to compute the size of the search space, associated with particular …

Optimization problems are of fundamental practical importance and can be found in almost
every aspect of human endeavour. Yet remarkably, we have a very limited understanding of …