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Wyszukujesz frazę "construction modelling" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Development of cost estimation models based on ANN ensembles and the SVM method
Autorzy:
Juszczyk, Michał
Powiązania:
https://bibliotekanauki.pl/articles/396649.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
construction cost estimation
cost modelling
ensemble of neural networks
support vector machine
koszty budowy
modelowanie kosztów
zespół sieci neuronowych
Opis:
Cost estimation, as one of the key processes in construction projects, provides the basis for a number of project-related decisions. This paper presents some results of studies on the application of artificial intelligence and machine learning in cost estimation. The research developed three original models based either on ensembles of neural networks or on support vector machines for the cost prediction of the floor structural frames of buildings. According to the criteria of general metrics (RMSE, MAPE), the three models demonstrate similar predictive performance. MAPE values computed for the training and testing of the three developed models range between 5% and 6%. The accuracy of cost predictions given by the three developed models is acceptable for the cost estimates of the floor structural frames of buildings in the early design stage of the construction project. Analysis of error distribution revealed a degree of superiority for the model based on support vector machines.
Źródło:
Civil and Environmental Engineering Reports; 2020, 30, 3; 48-67
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photogrammetry-based approach for collecting and processing information about an existing building
Autorzy:
Kontrimovičius, Robertas
Juszczyk, Michał
Leśniak, Agnieszka
Ustinovichius, Leonas
Miedziałowski, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/2204521.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photogrammetry
building information modelling
building model development
quantity take-off
construction works
information processing
fotogrametria
modelowanie informacji o budynku
opracowanie modelu budynku
zrzut ilościowy
roboty budowlane
przetwarzanie informacji
Opis:
Due to the organization of construction works, one of the most difficult situations is when a building is planned in a heritage or a densely built-up location. Fixing an existing situation manually takes a lot of time and effort and is usually not accurate. For example, it is not always possible to measure the exact spacing between buildings at different levels and to consider all outside elements of an existing building. Improper fixation of the existing situation causes mistakes and collisions in design and the use of inappropriate construction solutions. The development and progress in technologies such as BIM, laser scanning, and photogrammetry broaden the options for supporting the management of construction projects. It is important to have an effective fast collection and processing of useful information for management processes. The purpose of this paper is to analyze and present some aspects of photogrammetry to collect and process information about existing buildings. The methodology of the study is based on the comparison of two alternative approaches, namely photogrammetry and BIM modelling. Case studies present an analysis of the quantity take-offs for selected elements and parts of the buildings based on the two approaches. In this article, the specific use of photogrammetry shows that the error between the detailed BIM model and the photogrammetry model is only 1.02% and the accuracy is 98.98%. Moreover, physical capabilities do not always allow us to measure every desired element in reality. This is followed by a discussion on the usability of photogrammetry.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 1; art. no. e144453
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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