Constraint-based clustering model for determining contract packages of bridge maintenance inspection

Cheng, Yingmei; Leu, Sou-Sen

doi:10.1016/j.autcon.2007.12.001

Cited by 13 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bushel, Wolfinger and Gibson (2007) apresentam o algoritmo modk-prototype, uma modificação do algoritmo k-prototype que lida com dados médicos, os quais consideram simultaneamente microarranjos de expressão génica, classes de variáveis fenotípicas conhecidas, como avaliações de química clínica e observações histopatológicas. Cheng and Leu (2008) propuseram um novo algoritmo baseado no k-prototype para lidar com as restrições impostas pelo problema de inspeção de manutenção de pontes. Lee and Pedrycz (2009) apresentam um novo algoritmo baseado no k-prototype, chamado de p-mode prototype, o qual considera a frequência das classes dos atributos categóricos para determinar os centroides.…”

Section: Resultsunclassified

Agrupamento De Dados Mistos Baseados No Algoritmo K-Means: Uma Revisão Sistemática Da Literatura

Martarelli¹,

Nagano²

2019

Atas Da Conferência Ibero-Americana WWW/Internet 2019

View full text Add to dashboard Cite

O agrupamento de dados é uma atividade de mineração que busca por grupos naturais em conjuntos de dados não rotulados. Embora bem desenvolvida para dados numéricos, o desenvolvimento de algoritmos para dados mistos (atributos numéricos e categóricos) ainda é incipiente. Diante do fato de que os conjunto de dados mistos caracterizam a maioria dos problemas reais, o avanço desta temática é essencial para o beneficiamento da sociedade e da indústria. Dessa forma, este trabalho tem como objetivo reunir e discutir as principais contribuições publicadas na literatura sobre algoritmos de agrupamento de dados mistos, especificamente as abordagens baseadas no algoritmo k-means, já que este algoritmo apresenta alta velocidade de processamento e fácil implementação, características estas almejadas na resolução de problemas do mundo real. Diante disso, realizou-se uma revisão bibliográfica sistemática na base de dados Scopus, onde foram aceitos apenas artigos em inglês, com o indicador Jornal Citation Report (JCR) maior ou igual a um, ou com pelo menos dois indicadores de impacto maior ou igual a um. Como primeiro resultado da busca, obteve-se 1.104 trabalhos. Após a aplicação dos critérios adotados, obteve-se 456 trabalhos passíveis de avaliação. Posteriormente, avaliou-se quais trabalhos estavam dentro do objetivo da análise, por meio de três filtros de seleção, os quais contemplaram diferentes leituras dos trabalhos. Como resultado, obteve-se 37 artigos. Após um estudo detalhado, observou-se que esta temática ainda apresenta um desenvolvimento recente e esparso. Além disso, percebeu-se que os trabalhos selecionados exploraram alguns temas-chave, como a definição dos pesos dos atributos, número de grupos, inicialização dos centroides e agrupamento sujeito a restrições.

show abstract

Section: Resultsunclassified

Agrupamento De Dados Mistos Baseados No Algoritmo K-Means: Uma Revisão Sistemática Da Literatura

Martarelli¹,

Nagano²

2019

Atas Da Conferência Ibero-Americana WWW/Internet 2019

View full text Add to dashboard Cite

show abstract

“…A dynamic analysis was conducted and a comparison was made using the moving vehicle model for the Wbridge, which is a 5-span continuous bridge with 4 girders, by using the test vehicle to analytically determine the factor influencing the vibration serviceability of the bridge (Cheng, Y. M. and Leu, S. S. 2008;Cheng, Y. M. et al 2009), as shown in Table 2. The W-bridge was modeled using the 3D frame element that can determine all bending, shear, and torsion (Wang et al 1992), as shown in Fig.…”

Section: Parametric Study With the Analytical Methodsmentioning

confidence: 99%

Analytical and Experimental Approach for Assessing Vibration Serviceability of Highway Bridges Due to Heavy Vehicle Traffic

Lee

Kim

Skibniewski

2009

Balt. J. Road Bridge E.

View full text Add to dashboard Cite

The major goals of this paper are to evaluate the serviceability of bridges with vibration problems among these structures in actual use, and to establish the evaluation criteria based on the evaluation results. To accomplish these goals, the vehicle's weight, moving velocity, displacement from the measurement position, and acceleration were measured through the field test to evaluate the bridge's serviceability with respect to its vibration characteristics. Furthermore, the vibration characteristics of the bridge were analyzed with respect to various factors that influence its vibration. For this purpose, the three-axle truck used in the field test was modelled as the moving vehicle with 8 degrees of freedom, and the bridge considered was modelled using the frame element. According to the comparison of the analytical and experimental results, the analytical method that was used to evaluate the bridge's vibration serviceability as suggested in this paper based on the results of the analysis and field test is feasible.

show abstract

“…(Esping and Olsson, 2004) and (Nyström, 2007) focus on the possibilities to use partnering contracts. (Cheng et al, 2008) looks at how outsourced inspection activities should be "packaged" in order to increase efficiency.…”

Section: General Backgroundmentioning

confidence: 99%

Experiences from Procurement of Integrated Bridge Maintenance in Sweden

Mattsson

Lind

2009

European Journal of Transport and Infrastructure Research

View full text Add to dashboard Cite

The trend in many countries is to outsource maintenance with competitive tendering. The design of the tender is then a crucial issue. A new type of tendering contract, called "Integrated Bridge Maintenance", was introduced in one experimental area in Sweden. In this case bridge maintenance is separated out from the standard road maintenance contract. A pilot project has been running since 2004 for all bridges in Uppsala County with about 400 bridges. The experiences and lessons from this pilot project are presented here, and analysed from a transaction cost perspective. An important feature of the contract was that it contained a combination of measures that should be carried out and properties of the bridges that the contractor was responsible to maintain. This created a balance between predictability and flexibility for the contractor. The client was satisfied because of increased competence and a low price. The latter can partly be explained by the possibility for the specialised bridge crew to get additional work from other sectors. One problem was that some properties were difficult to measure, which led to some controversies. As information about old bridges always are incomplete a partnering structure need to be built into the contract. Experience has also shown that a conscious policy to maintain long run competition is important. The general conclusion is that the project was seen as successful and as creating more "value for money".

show abstract

Constraint-based clustering model for determining contract packages of bridge maintenance inspection

Cited by 13 publications

References 34 publications

Agrupamento De Dados Mistos Baseados No Algoritmo K-Means: Uma Revisão Sistemática Da Literatura

Agrupamento De Dados Mistos Baseados No Algoritmo K-Means: Uma Revisão Sistemática Da Literatura

Analytical and Experimental Approach for Assessing Vibration Serviceability of Highway Bridges Due to Heavy Vehicle Traffic

Experiences from Procurement of Integrated Bridge Maintenance in Sweden

Contact Info

Product

Resources

About