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Container vessel fleet deployment for liner shipping with stochastic dependencies in shipping demand

Ng, ManWo - In: Transportation Research Part B: Methodological 74 (2015) C, pp. 79-87

acknowledge and account for the significant amount of uncertainty present in shipping demand in real world container shipping. In …

Persistent link: https://www.econbiz.de/10011264633

Distribution-free vessel deployment for liner shipping

Ng, ManWo - In: European Journal of Operational Research 238 (2014) 3, pp. 858-862

uncertainty in shipping demand. In this paper, it is argued that such distributions are hard, if not impossible, to obtain in …

Persistent link: https://www.econbiz.de/10010785319

A freight transport optimization model for integrated network, service, and policy design

Zhang, M.; Janic, M.; Tavasszy, L.A. - In: Transportation Research Part E: Logistics and … 77 (2015) C, pp. 61-76

This paper presents a freight transport optimization model that simultaneously incorporates multimodal infrastructure, hub-based service network structures, and the various design objectives of multiple actors. The model has been calibrated and validated using real-life data from the case study...

Persistent link: https://www.econbiz.de/10011263968

Minimizing fuel emissions by optimizing vessel schedules in liner shipping with uncertain port times

Qi, Xiangtong; Song, Dong-Ping - In: Transportation Research Part E: Logistics and … 48 (2012) 4, pp. 863-880

We consider the problem of designing an optimal vessel schedule in the liner shipping route to minimize the total expected fuel consumption (and emissions) considering uncertain port times and frequency requirements on the liner schedule. The general optimal scheduling problem is formulated and...

Persistent link: https://www.econbiz.de/10010755040

Speaking Stata: On getting functions to do the work

Cox, Nicholas J. - In: Stata Journal 2 (2002) 4, pp. 411-427

Functions in Stata take two main forms, built-in functions that are part of the executable and egen functions written in Stata's own language. These are surveyed, giving a variety of tips and tricks, and noting the large number of user-written egen functions available for download from the...

Persistent link: https://www.econbiz.de/10005583262

Unbinding transitions of membranes and strings from single and double-well potential

Asfaw, Mesfin - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 14, pp. 3526-3536

strings. We derive the scaling laws for strings analytically. The exact analytical results provide scaling estimate for …

Persistent link: https://www.econbiz.de/10010590246

On non-extensive statistics, chaos and fractal strings

Castro, C. - In: Physica A: Statistical Mechanics and its Applications 347 (2005) C, pp. 184-204

-extensive statistics (with a non-additive q-entropy) of an ensemble of fractal strings and branes of different dimensionalities. Non …-extensive entropy and probability distribution of a canonical ensemble of fractal strings and branes is studied in terms of their …-particles, knot theory, quantum groups and number theory are briefly discussed within the framework of fractal strings and branes. …

Persistent link: https://www.econbiz.de/10010590675

Speaking Stata: MMXI and all that: Handling Roman numerals within Stata

Cox, Nicholas - In: Stata Journal 11 (2011) 1, pp. 126-142

The problem of handling Roman numerals in Stata is used to illustrate issues arising in the handling of classification codes in character string form and their numeric equivalents. The solutions include Stata programs and Mata func- tions for conversion from numeric to string and from string to...

Persistent link: https://www.econbiz.de/10008862275

Aircraft routing under different business processes

Lacasse-Guay, Eve; Desaulniers, Guy; Soumis, François - In: Journal of Air Transport Management 16 (2010) 5, pp. 258-263

Given a set of scheduled flights that must be operated by the same aircraft type, the aircraft routing problem consists of building anonymous aircraft routes that respect maintenance requirements and cover each flight exactly once. This paper looks at the nature of the problem and introduces a...

Persistent link: https://www.econbiz.de/10010755172

Analysing risk orientation in a stochastic VRP

Reimann, Marc - In: European Journal of Industrial Engineering 1 (2007) 2, pp. 111-130

In this paper, the value of correctly addressing uncertainty and risk in operational planning is studied in the context … evaluation of different risk attitudes in planning vehicle routes, (2) the value of considering the uncertainty for planning the …

Persistent link: https://www.econbiz.de/10005754444