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Wyświetlanie 1-2 z 2
Tytuł:
Appraisal of process mapping in heavy engineering projects: a case of Nigeria East-West coastal highway
Autorzy:
Ekung, S.
Adeniran, L.
Adu, E.
Powiązania:
https://bibliotekanauki.pl/articles/11771.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The need to improve project delivery process is one of the leading advocacies of relevant construction industry reports. Improved process is sine qua non for improve performance. Critical to the improvement process, is the need to assess construction process’ capability to meet design and production requirements. The present study examined process mapping of a cable-stayed bridge in the Nigeria’s east-west coastal highway project. Qualitative data was collected through a three phase process mapping protocol using mainly self-generate, one-on-one interview and focus group. Twenty non-related sub-processes were identified from four pre-construction stages: investigation; feasibility; design; and tender. Integrative definition (IDEFO) and Unified Language Modelling (UML) are used to map the feasibility, design and the design sub-processes. The mapping indicates the design sequence is iterative and factually flexible until such a point where functional design satisfies appropriate forcing test. The study provides medium for communicating complex construction functions thereby facilitating common understanding in the way projects are delivered with appropriate information about inputs, output and resources.
Źródło:
International Letters of Natural Sciences; 2014, 15, 1
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of flow patterns in industrial gold leaching tank by radiotracer residence time distribution measurement
Autorzy:
Stęgowski, Z.
Dagadu, C. P. K.
Furman, L.
Akaho, E. H. K.
Danso, K. A.
Mumuni, I. I.
Adu, P. S.
Amoah, C.
Powiązania:
https://bibliotekanauki.pl/articles/148572.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
mineral processing
gold ores
leaching
radiotracer
modelling
Opis:
The carbon-in-leach (CIL) process is one the most efficient methods of gold recovery from gold bearing ores. The efficiency of the leaching process greatly depends on the flow structure created by mechanical agitation (in some cases air agitation) in the leaching tanks. Residence time distribution (RTD) measurement was conducted in the CIL section of a gold processing plant in order to determine the flow structure in the first tank using the 131I radioactive tracer. The shape of the experimental data revealed that the flow behaviour in the tank was close to an ideal mixer. Modelling of the experimental data, however, revealed that the tank was not behaving as a single perfect mixer, but consisted of two mixing zones. The flow structure in the tank was best described by the “perfect mixers with exchange” model consisting of two mixing zones. The model allowed the determination of flow parameters including the mean residence time, flow rate and volumes of the mixing zones.
Źródło:
Nukleonika; 2010, 55, 3; 339-344
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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