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The occurrence of accident be understood as mutations in a qualitative change caused by a continuous change of some of the parameters within the system. The system from security state into the state is actually a mutation phenomenon. The paper applies the Catastrophe theory and system analysis method of the accident causation, establishes the spire catastrophe model. By analysing the model, indicates...
The microbial re-growth of the pipe wall biofilm in water distribution system may endanger the safety of drinking water, so it is necessary to research the biofilm microbe. In order to study the diversity and growth of biofilm bacteria, a model pipe network which dynamic simulated the distribution system was designed. The bacteria of the model biofilm were cultivated by using R2A. The results shows...
Generally, hydroelectric projects have long construction period, and its investment scale is very big. Simultaneously, its construction technology is difficult. Under these conditions, how to balance construction cost, schedule, and quality is always a problem concerned by constructors. In construction management, the optimum goal is minimum cost with the guarantee for schedule and quality. This paper...
This paper proposes different approaches for the ecodesign of safety transformer based on optimization methods. The first approach consists in a life cycle analysis to highlight the stage of the product life that has the most considerable impact. An effective way to reduce the environmental impacts is to maximize the transformer efficiency. The second approach is to build a surrogate model of environmental...
In this paper, finite element analysis has been applied on the Phi2.8 mtimes5.75+2.25 m of southern Africa that has been contracted by CBMI Construction Co Ltd. Different contact finite element model as manholes in different position of the twelve clock points are built by using ANSYS parametric design language (APDL). Stress and deformation under the actual condition were presented by calculating,...
The construction industry has been facing a paradigm shift to (i) increase; productivity, efficiency, infrastructure value, quality and sustainability, (ii) reduce; lifecycle costs, lead times and duplications, via effective collaboration and communication of stakeholders in construction projects. Digital construction is a political initiative to address low productivity in the sector. This seeks...
This paper discusses the manner in which cinema buildings of the 20th century represent both an important physical record of society, and a challenge in terms of representing a complex range of historical, cultural, economic and physical data sets.The paper provides an overview of visualisation techniques which are appropriate to the subject, and provides a case study taken from the city of Aberdeen...
For application researches of the detection for the gas signal source, a method for orientation estimation of the gas signal source in the two-dimensional space and its algorithm are presented in the paper. In the method, a mode of dual-line gas sensor array is applied to sample the signals of the gas concentration in real time, and the time delay estimation, an approach of the signal processing,...
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