Ronald G McGarvey,Andreas Thorsen
Ronald G McGarvey
Classical facility location models can generate solutions that do not maintain consistency in the set of utilized facilities as the number of utilized facilities is varied. We introduce the concept of nested facility locations, in which the...
Anna Nagurney,Deniz Besik
Anna Nagurney
The spatial price equilibrium modeling framework, which emphasizes the importance of transportation costs between markets, has been utilized in agricultural, energy, mineral as well as financial applications. In this paper, we construct sta...
On the asymptotic behavior of the Douglas-Rachford and proximal-point algorithms for convex optimization [0.03%]
关于凸优化中Douglas-Rachford算法和近点算法的渐近行为分析
Goran Banjac,John Lygeros
Goran Banjac
Banjac et al. (J Optim Theory Appl 183(2):490-519, 2019) recently showed that the Douglas-Rachford algorithm provides certificates of infeasibility for a class of convex optimization problems. In particular, they showed that the difference ...
Francesca Guerriero,Rosita Guido
Francesca Guerriero
In this paper, we propose optimization models to address flexible staff scheduling problems and some main issues arising from efficient workforce management during the Covid-19 pandemic. The adoption of precautionary measures to prevent the...
A variable neighborhood search for the last-mile delivery problem during major infectious disease outbreak [0.03%]
一种针对重大传染病疫情期间最后一公里配送问题的变邻域搜索算法研究
Li Jiang,Xiaoning Zang,Junfeng Dong et al.
Li Jiang et al.
During major infectious disease outbreak, such as COVID-19, the goods and parcels supply and distribution for the isolated personnel has become a key issue worthy of attention. In this study, we propose a delivery problem that arises in the...
On the approximability of the fixed-tree balanced minimum evolution problem [0.03%]
固定树平衡最小进化问题的可近似性研究
Martin Frohn
Martin Frohn
The Fixed-Tree BMEP (FT-BMEP) is a special case of the Balanced Minimum Evolution Problem (BMEP) that consists of finding the assignment of a set of n taxa to the n leaves of a given unrooted binary tree so as to minimize the BMEP objective...
Giorgio Zucchi,Manuel Iori,Anand Subramanian
Giorgio Zucchi
This paper addresses a real-life personnel scheduling problem in the context of Covid-19 pandemic, arising in a large Italian pharmaceutical distribution warehouse. In this case study, the challenge is to determine a schedule that attempts ...
Gradient-type penalty method with inertial effects for solving constrained convex optimization problems with smooth data [0.03%]
具有惯性效应的梯度型罚函数法在光滑约束下的凸优化问题中的应用
Radu Ioan Boţ,Ernö Robert Csetnek,Nimit Nimana
Radu Ioan Boţ
We consider the problem of minimizing a smooth convex objective function subject to the set of minima of another differentiable convex function. In order to solve this problem, we propose an algorithm which combines the gradient method with...