The urban recharging infrastructure design problem with stochastic demands and capacitated charging stations

2019 ◽  
Vol 119 ◽  
pp. 22-44 ◽  
Author(s):  
Barış Yıldız ◽  
Evren Olcaytu ◽  
Ahmet Şen
Keyword(s):  
Design Problem ◽  
Stochastic Demands ◽  
Infrastructure Design ◽  
Charging Stations

scholarly journals Electric Vehicle Routing Problems with Stochastic Demands and Dynamic Remedial Measures

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Xianlong Ge ◽  
Ziqiang Zhu ◽  
Yuanzhi Jin
Keyword(s):  
Vehicle Routing ◽  
Electric Vehicle ◽  
Heuristic Algorithm ◽  
Search Algorithm ◽  
Rapid Development ◽  
Remedial Measures ◽  
Routing Problem ◽  
Stochastic Demands ◽  
Hybrid Heuristic Algorithm ◽  
Charging Stations

With the rapid development of e-commerce, logistic enterprises must better predict customer demand to improve distribution efficiency, so as to deliver goods in advance, which makes logistics stochastic and dynamic. In order to deal with this challenge and respond to the concept of “green logistics,” an electric vehicle routing problem with stochastic demands (EVRPSD) and proactive remedial measures is investigated, and an EVRPSD model with probability constraints is established. At the same time, a hybrid heuristic algorithm, combining a saving method and an improved Tabu search algorithm, is proposed to solve the model. Moreover, two insertion strategies with the greedy algorithm for charging stations and dynamic nodes are introduced. Finally, a large number of experimental data show that the heuristic algorithm proposed in this paper is feasible and effective.

scholarly journals Algorithm to solve a chance-constrained network capacity design problem with stochastic demands and finite support

2016 ◽  
Vol 63 (3) ◽  
pp. 236-246
Author(s):  
Kathryn M. Schumacher ◽  
Richard Li-Yang Chen ◽  
Amy E.M. Cohn ◽  
Jeremy Castaing
Keyword(s):  
Design Problem ◽  
Network Capacity ◽  
Finite Support ◽  
Capacity Design ◽  
Stochastic Demands

Design Problem Solving

2006 ◽  
Vol 214 (2) ◽  
pp. 73-86 ◽  
Author(s):  
Constance Winkelmann ◽  
Winfried Hacker
Keyword(s):  
Problem Solving ◽  
Design Problem

Zusammenfassung. In zwei experimentellen Studien werden mögliche alternative Bedingungen der lösungsgüteverbessernden Wirkung einer Frage-Antwort-Technik im Entwurfsdenken (Design Problem Solving) geprüft. In der ersten Studie (N = 84) wurden differential- und kognitionspsychologische Bedingungen geprüft. Eine Aussagenanalyse in einer zweiten Studie (N = 94) sollte die nachgewiesenen Ergebnisse vertiefen. Für die in beiden Studien ermittelten Lösungsgüteverbesserungen konnten keine differentialpsychologischen Abhängigkeiten von Vorgehensstilen nachgewiesen werden. In kognitionspsychologischer Hinsicht zeigte sich, dass sowohl Fragen, die die Forderungen der Aufgabe in Erinnerung bringen, als auch Fragen, deren Beantwortung die Auslösung von Denkprozessen fördern, zur Lösungsgüteverbesserung beitragen. Größere Effekte werden bei der Kombination beider Fragenarten nahe gelegt. Die Ergebnisse der Aussagenanalyse weisen auf eine sowohl beschreibende als auch begründende und bewertende Vorgehensweise der Untersuchungsteilnehmer hin, die Verbesserungen erzielten. Fragen für weiterführende Untersuchungserfordernisse werden abgeleitet.

Getting to know a new protocol in hypertension care

2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Mona Lundin
Keyword(s):  
Blood Pressure ◽  
Digital Technology ◽  
Interaction Analysis ◽  
Medical Discourse ◽  
Graphical Form ◽  
Graph Data ◽  
Average Blood Pressure ◽  
Infrastructure Design

This study explores the use of a new protocol in hypertension care, in which continuous patient-generated data reported through digital technology are presented in graphical form and discussed in follow-up consultations with nurses. This protocol is part of an infrastructure design project in which patients and medical professionals are co-designers. The approach used for the study was interaction analysis, which rendered possible detailed in situ examination of local variations in how nurses relate to the protocol. The findings show three distinct engagements: (1) teasing out an average blood pressure, (2) working around the protocol and graph data and (3) delivering an analysis. It was discovered that the graphical representations structured the consultations to a great extent, and that nurses mostly referred to graphs that showed blood pressure values, which is a measurement central to the medical discourse of hypertension. However, it was also found that analysis of the data alone was not sufficient to engage patients: nurses' invisible and inclusion work through eliciting patients' narratives played an important role here. A conclusion of the study is that nurses and patients both need to be more thoroughly introduced to using protocols based on graphs for more productive consultations to be established. 

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