Results 121 to 130 of about 44,963 (303)

A Column Generation Approach to the Capacitated Vehicle Routing Problem with Stochastic Demands [PDF]

In this article we introduce a new exact solution approach to the Capacitated Vehicle Routing Problem with Stochastic Demands (CVRPSD). In particular, we consider the case where all customer demands are distributed independently and where each customer’s
Christiansen, Christian H., Lysgaard, Jens   +1 more
core  

Emergent Spin‐Glass Behavior in an Iron(II)‐Based Metal–Organic Framework Glass

Advanced Functional Materials, EarlyView.
A one‐pot, solvent‐free synthesis yields an Fe2+‐based metal‐organic framework (MOF) glass featuring a continuous random network structure. The material exhibits spin‐glass freezing at 14 K, driven by topological‐disorder and short‐range magnetic frustration, showcasing the potential of MOF glasses as a plattform for cooperative magnetic phenomena in ...
Chinmoy Das, Soma Salamon, Joachim Landers, Jan‐Benedikt Weiß, Wen‐Long Xue, Pascal Kolodzeiski, Roman Pallach, Heiko Wende, Sebastian Henke   +8 more
wiley   +1 more source

An exact method for vehicle routing problem with backhaul discounts in urban express delivery network

Cleaner Logistics and Supply Chain
The surge in e-commerce has led to an increased demand for urban express services, requiring the strategic development of delivery networks that are both efficient and cost-effective.
Jinqiu Zhao, Yongwu Liu, Jinwei Zhang, Jing Zhang, Yixiao Huang, Le Yu, Binglei Xie   +6 more
doaj   +1 more source

Branch-and-Price and Heuristic Column Generation for the Generalized Truck-and-Trailer Routing Problem || Branch-and-Price y generación heurística de columnas para el problema generalizado de rutas de trenes de carretera [PDF]

Revista de Métodos Cuantitativos para la Economía y la Empresa, 2011
The generalized truck-and-trailer routing problem (GTTRP) constitutes a unified model for vehicle routing problems with trailers and a fixed lorry-trailer assignment.
Drexl, Michael
doaj  

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

A study on exponential-size neighborhoods for the bin packing problem with conflicts

, 2017
We propose an iterated local search based on several classes of local and large neighborhoods for the bin packing problem with conflicts. This problem, which combines the characteristics of both bin packing and vertex coloring, arises in various ...
Capua, Renatha, Frota, Yuri, Ochi, Luiz Satoru, Vidal, Thibaut   +3 more
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

A branch and price algorithm for the minimum power multicasting problem in wireless sensor networks [PDF]

, 2018
The Minimum Power Multicast Problem arises in wireless sensor networks and consists in assigning a transmission power to each node of a network in such a way that the total power consumption over the network is minimized, while a source node is connected
Leggieri, V., Montemanni, R.
core  

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

The pass-through of energy commodity price volatility along the pricing chain in the euro area: A disaggregate approach

International Review of Economics & Finance
This paper extends the existing literature by assessing the pass-through of energy commodity price volatility to producer and consumer price volatility in the euro area at a disaggregated level.
César Castro, Rebeca Jiménez-Rodríguez   +1 more
doaj   +1 more source