CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id c840
authors Cheung, S.-O., Tong, T.K.-L. and Tam, C.-M.
year 2001
title Site pre-cast yard layout arrangement through genetic algorithms
source Automation in Construction 11 (1) (2002) pp. 35-46
summary The use of modular construction has gained wide acceptance in the housing sector. Standardized modular units are often pre-cast on site. The establishment of site pre-cast yard, in particular arranging the pre-cast facilities within the compound, presents real challenge to site management. This complex task is further aggregated with the involvement of several resources with different transport cost. A GA-model is developed for the search for a near optimal layout solution. The fitness function is to minimize the total transport cost for a pre-determined daily output. The use of the model is illustrated by an example. When compared with the best solution within the initial population, 18.45% reduction in cost for resources flow was achieved by the near optimal layout arrangement arrived at the 673rd trial. It is also suggested that the model can be extended to other layout problems such as warehouse and production line.
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 19:22

_id 1767
authors Loveday, D.L., Virk, G.S., Cheung, J.Y.M. and Azzi, D.
year 1997
title Intelligence in buildings: the potential of advanced modelling
source Automation in Construction 6 (5-6) (1997) pp. 447-461
summary Intelligence in buildings usually implies facilities management via building automation systems (BAS). However, present-day commercial BAS adopt a rudimentary approach to data handling, control and fault detection, and there is much scope for improvement. This paper describes a model-based technique for raising the level of sophistication at which BAS currently operate. Using stochastic multivariable identification, models are derived which describe the behaviour of air temperature and relative humidity in a full-scale office zone equipped with a dedicated heating, ventilating and air-conditioning (HVAC) plant. The models are of good quality, giving prediction accuracies of ± 0.25°C in 19.2°C and of ± 0.6% rh in 53% rh when forecasting up to 15 minutes ahead. For forecasts up to 3 days ahead, accuracies are ± 0.65°C and ± 1.25% rh, respectively. The utility of the models for facilities management is investigated. The "temperature model" was employed within a predictive on/off control strategy for the office zone, and was shown to substantially improve temperature regulation and to reduce energy consumption in comparison with conventional on/off control. Comparison of prediction accuracies for two different situations, that is, the office with and without furniture plus carpet, showed that some level of furnishing is essential during the commissioning phase if model-based control of relative humidity is contemplated. The prospects are assessed for wide-scale replication of the model-based technique, and it is shown that deterministic simulation has potential to be used as a means of initialising a model structure and hence of selecting the sensors for a BAS for any building at the design stage. It is concluded that advanced model-based methods offer significant promise for improving BAS performance, and that proving trials in full-scale everyday situations are now needed prior to commercial development and installation.
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 19:22

_id caadria2010_054
id caadria2010_054
authors Wong, Chit Kin D. and Yim Fun L. Cheung
year 2010
title Simply complex: a case study of construction-driven design using computational methods
source Proceedings of the 15th International Conference on Computer Aided Architectural Design Research in Asia / Hong Kong 7-10 April 2010, pp. 585-594
summary This paper explores how fabrication-based criteria can be integrated into design processes through computational methods. Based on the ongoing project of the Library of the Bao’an Cultural Complex in Shenzhen, China (referred as ‘the Library’ in this paper hereafter), this paper discusses the process of the rationalisation of an intuitive architectural form and its subsequent tiling design based on the adaptation to the conventional fabrication techniques of the building façade industry in China. These objectives are followed by the establishment of robust computational systems of automation that provide a concrete basis for the visualisation, the development of envelope details, and the generation of the list of component data for fabrication. This integrative approach is markedly different from a more conventional one, in which computational systems serve as a priori solutions to unconstraint design sketches.
keywords Fabrication criteria; rationalisation; computation workfl ow
series CAADRIA
email wongchitkin@gmail.com
last changed 2012/05/30 19:29

_id cf9d
authors Yeung, C., Cheung, L., Yen, J. and Cheng, C.
year 1998
title Virtual Classroom for Architecture
source CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 93-102
summary Over the past few years, we have seen that the evolution of the Internet and World Wide Web technologies have significantly enhanced the global communication and collaboration. People, no matter where they are, are virtually getting closer and closer. The barriers that came from time and distance have been partially removed by the use of such technologies. Internet and WWW are not just technology, they are an environment or space. With such breakthrough in technologies, a new paradigm in education is there. The education very differently from what we have now. This paper presents an Internet-based environment to support teaching and learning in architecture education. We will discuss the design concept and how to integrate the technology and knowledge-based techniques to implement the learning environment for architecture students. Architecture is a very specific discipline which consists of the knowledge from arts, sciences, engineering, and more. One of the focuses in architecture education is to teach how to express and communicate design ideas with the multimedia or other technologies, such as, virtual reality (VR). A case study presented in this paper is about how to deliver and present the ancient Chinese temples and its bracket set systems from the server to the browsers to support distance teaching. That is, students and teachers may not be in the same location, but they are able to watch the same objects and to exchange ideas. We will discuss how to use multimedia technologies to illustrate how a temple and its bracket set differ from dynasties to dynasties and introduce its basic properties to the viewers. Moreover, we will discuss how we organize and handle 3-dimensional objects with such system. Many people are still arguing about whether Internet-based teaching or a real classroom setting is better. We are not implying that Internet-based teaching is superior or predicting that it will dominate the teaching in the near future. However, we strongly believe that it is just another alternative to express and represent architectural thinking to over some of the barriers that come from time and distance. We believe, that it is always true, that the Internet-based teaching may provide both teachers and learners greater flexibility and to support more International collaboration. That is, regardless where the students or teachers are, they can always participate in learning or teaching and make teaching and learning much more rich and interesting.
keywords Virtual Classroom
series CAADRIA
email csky@eee.hku.hk
more http://www.caadria.org
last changed 1998/12/02 13:44

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