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A new constructive heuristic driven by machine learning for the traveling salesman problem

Mele, Umberto Junior ; Gambardella, Luca Maria ; Montemanni, Roberto

In: Algorithms, 2021, vol. 14, no. 9, p. 25

Recent systems applying Machine Learning (ML) to solve the Traveling Salesman Problem (TSP) exhibit issues when they try to scale up to real case scenarios with several hundred vertices. The use of Candidate Lists (CLs) has been brought up to cope with the issues. A CL is defined as a subset of all the edges linked to a given vertex such that it contains mainly edges that are believed to be...

Essays in empirical finance

Garzoli, Matteo ; Plazzi, Alberto (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021ECO007.

I use empirical methods to forecast U.S. repeat-sales house price indices, to analyze Swiss long-run default rates and to investigate the role of country and industry effects on the downside risk of stock index returns.

Planning of a make-to-order production process in the printing industry

Baumann, Philipp ; Forrer, Salome ; Trautmann, Norbert

In: Flexible Services and Manufacturing Journal, 2015, vol. 27, no. 4, p. 534-560

Dictionary Learning for Fast Classification Based on Soft-thresholding

Fawzi, Alhussein ; Davies, Mike ; Frossard, Pascal

In: International Journal of Computer Vision, 2015, vol. 114, no. 2-3, p. 306-321

Decomposing TIAM-MACRO to Assess Climatic Change Mitigation

Kypreos, Socrates ; Lehtila, Antti

In: Environmental Modeling & Assessment, 2015, vol. 20, no. 6, p. 571-581

Centrality of trees for capacitated $$k$$ k -center

An, Hyung-Chan ; Bhaskara, Aditya ; Chekuri, Chandra ; Gupta, Shalmoli ; Madan, Vivek ; Svensson, Ola

In: Mathematical Programming, 2015, vol. 154, no. 1-2, p. 29-53

On the numerical solution of some Eikonal equations: An elliptic solver approach

Caboussat, Alexandre ; Glowinski, Roland ; Pan, Tsorng-Whay

In: Chinese Annals of Mathematics, Series B, 2015, vol. 36, no. 5, p. 689-702

Concurrent optimization of harvesting and road network layouts under steep terrain

Bont, Leo ; Heinimann, Hans ; Church, Richard

In: Annals of Operations Research, 2015, vol. 232, no. 1, p. 41-64

Node-level performance modeling of sparse factorization solver

Janalík, Radim ; Schenk, Olaf (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO006.

Solving large sparse linear systems is at the heart of many application problems arising from scientific and engineering problems. These systems are often solved by direct factorization solvers, especially when the system needs to be solved for multiple right-hand sides or when a high numerical precision is required. Direct solvers are based on matrix factorization, which is then followed by...

OpenCrowd : A Human-AI Collaborative Approach for Finding Social Influencers via Open-Ended Answers Aggregation

Arous, Ines ; Yang, Jie ; Khayati, Mourad ; Cudré-Mauroux, Philippe

In: WWW '20: Proceedings of The Web Conference 2020, 2020, vol. April, p. 1851-1862

Finding social influencers is a fundamental task in many online applications ranging from brand marketing to opinion mining. Existing methods heavily rely on the availability of expert labels, whose collection is usually a laborious process even for domain experts. Using open-ended questions, crowdsourcing provides a cost-effective way to find a large number of social influencers in a short...