Showing 1 - 10 of 2,786
The Gauss-Marquardt-Levenberg (GML) method of computer-based parameter estimation, in common with other gradient-based approaches, suffers from the drawback that it may become trapped in local objective function minima, and thus report optimized parameter values that are not, in fact, optimized...
Persistent link: https://www.econbiz.de/10009447949
to ignore, refurbish/rehabilitate, or replace a bridge. This dissertation formulates and applies two models, one … deterministic and the other probabilistic, capable of predicting future condition ratings of the three main components of a bridge …; wearing surface, superstructure, and substructure. The contribution to bridge deterioration by environment factors including …
Persistent link: https://www.econbiz.de/10009477958
The move towards commercialization and privatization has pressured airports to become more productive and competitive. The need to devise an overall (total) productivity measure is increasingly important in airport business. The dissertation made three major research contributions. First, it...
Persistent link: https://www.econbiz.de/10009450618
This thesis analyzes and compares the effects of different objectives and financial constraints on conventional and flexible route bus systems, with special emphasis on the relation between subsidy and social welfare. Social welfare is the sum of producer surplus (profit) and consumer surplus...
Persistent link: https://www.econbiz.de/10009450631
The aging of bridges and traffic volume increase result in deterioration of bridge conditions and consequently … resources to maintain bridges in good conditions. Current bridge management practices use cost as the main factor for … determining maintenance strategies for bridges. Bridge management methods that identify bridges based on risk considerations and …
Persistent link: https://www.econbiz.de/10009450638
In the electronic market place, the auction is known to be economically efficient, allowing players to maximize their own benefits. Through this mechanism, new spot markets are created, which connect buyers and sellers. In this new spot markets, many problem contexts give rise to competitive...
Persistent link: https://www.econbiz.de/10009450639
Projects are commonly over budget and behind schedule, to some extent because uncertainties are not accounted for in cost and schedule estimates. Research and practice is now addressing this problem, often by using Monte Carlo methods to simulate the effect of variances in work package costs and...
Persistent link: https://www.econbiz.de/10009450640
Logistics managers rely on increasingly sophisticated technologies to track demand and associated inventories, allowing rapid response to meet anticipated demand, avoid shortfalls while minimizing transportation and inventory carrying costs. This ability to respond gives rise to complex decision...
Persistent link: https://www.econbiz.de/10009450642
Due to special characteristics of Public Private Partnerships (PPPs), the ―transaction cost‖ in PPPs is more than other delivery methods. Although there have been some attempts to study transaction costs in PPPs in Europe, transaction costs of PPPs in the US has not been explored well, and...
Persistent link: https://www.econbiz.de/10009450668
(WAVES) was developed to predict bridge pier scour in tidal estuaries and facilitate a risk-based design approach for bridges …. The WAVES program is the result of the application of accepted theories regarding the mechanism of bridge pier scour in … for scour around bridge piers. Through the performance of this study, several conclusions were drawn. First, a number of …
Persistent link: https://www.econbiz.de/10009450669