Update seminars

content/news/2025/seminars/january_to_july/beck.md

@@ -2,7 +2,7 @@
 title: "A Brief Introduction to Bilevel Optimization and Uncertainty: Key Concepts and Some Recent Algorithmic Advances"
 speaker: Yasmine Beck
 tags: [seminar, seminars_2025_jan_july]
-date: 2025-04-08         # very important
+date: 2025-05-15         # very important
 publishdate: 2025-01-01
 layout: seminar
 

content/news/2025/seminars/january_to_july/cote.md

+---
+title: "Service Level Requirements for Real-Life-Sized Bicycle Sharing Systems"
+speaker: Jean-François Côté
+tags: [seminar, seminars_2025_jan_july]
+date: 2025-04-08         # very important
+publishdate: 2025-01-01
+layout: seminar
+
+# optional parameters
+institution: Université laval
+position: Professor
+website: https://sites.google.com/view/jfcote/
+tag: cote_seminar # unique tag of this project
+image: 
+imagesize: 30 # do not change
+---
+
+This talk presents a two-step approach to managing Service Level Requirements (SLR) in real-life Bicycle Sharing Systems (BSS). SLR is a general concept that broadly describes how to effectively manage a BSS to improve user satisfaction while minimizing system operation costs. The two steps involve two proposed problems: first, the Target-Level Problem computes target bicycle quantities for stations, maximizing trip satisfaction. Second, the Bicycle Rebalancing Problem designs vehicle routes to adjust bicycle quantities. SLR literature includes several variants of these problems, but to our knowledge, very few exact approaches such as the one we propose can successfully handle real-life BSS, which comprise thousands of stations, tens of thousands of bicycles, and nearly one hundred thousand daily trips. We gather data from real-life BSS from Boston, Chicago, Madrid, Mexico City, Montreal, New York, San Francisco, Toronto, and Washington DC. From a managerial perspective, our numerical results provide the decision-makers of BSS with several insights related to bicycle and station usage throughout the network of stations.

content/news/2025/seminars/january_to_july/flambard.md

+---
+title:  "A semi-infinite constraint generation algorithm for adjustable robust optimization"
+speaker: Patxi Flambard
+tags: [seminar, seminars_2025_jan_july]
+date: 2025-04-17           # very important
+publishdate: 2025-01-01
+layout: seminar
+
+# optional parameters
+institution: Centre Inria de l'université de Bordeaux
+position: PhD student
+website:
+tag: flambard_seminar_2025 # unique tag of this project
+image: 
+imagesize: 30 # do not change
+---
+
+