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When people pass through a narrow passage, once the perceived disaster will cause the crowd to generate pressure, to promote their competitive behavior, which lead to disorder and congestion. This is a very serious threat to the evacuation rate and export efficiency of the evacuees. How to optimize the crowd's guidance after taking these effects is an important issue. Based on the advanced micro-pedestrian...
The combination of dynamic model and static model in UML can ensure the integrity of state information and unification of transition process. Our goal is unlimited by areas or tools to formalize the state chart by B. We build static model of state chart diagram by extracting the meta-class as the static aspects. Every meta-class of state chart can be formalized as an associated abstract machine and...
In the era of big data processing, the type and scale of human society data are increasing rapidly. Data processing gradually transformed from the traditional simple objects into a basic social resource. Along with the technology development of expansion and storage of massive complex data, manage building information has gradually become possible. For a long time, building life cycle assessment (BLCA)...
This paper introduces the Modelica Buildings library which has been developed for the advanced simulation of building energy and control systems. Modelica offers benefits compared to conventional approaches for integrating models from different domains, and for simulating systems with largely varying time responses such as building energy systems and control algorithms. This paper also introduces...
Building simulation models play a vital role in optimal building climate control, energy audit, fault detection and diagnosis, continuous commissioning, and planning. Real system parameters are often unknown or partially unknown and need to be identified through historical data, which are currently acquired by heuristically designed experiments. Without quality sensor data, model calibration is prone...
First, it is introduced that the BIM technology in the paper in order to solve the problem of built drawings and the completion of settlement in the completion phase. Then, verifying the feasibility of BIM technology in the completion phase through judging whether that matches two conditions. The first condition is whether the completion model with BIM is integrity or not. The second is the BIM technology...
Probabilistic risk assessment provides a practical approach for assessing the security capabilities of systems. Terrorism risk assessment requires estimation of the probabilities and consequences of hypothetical attacks against a target. In order to address the interdependencies between the different elements present in the target environment we propose to develop a computer-based model. The model...
This paper describes an agent based modeling (ABM) study oriented towards simulating crowds and movements of agents within a confined area. The region of interest is a rectangular room with one or two exits, where the sounding of an alarm triggers agents to move towards the exit(s). The agent based model is built around a game framework with emphasis on visualization of agent behavior. Agent interactions...
A data exchange and sharing mechanism is present among various general FEM softwares. Based on the OPP concept, a kernel module is designed to link FEM softwares and IFC based 3D solid database. Different classes are constructed to store model information from different FEM softwares and mapping relationships are set up between the classes and the kermel module. An example of high rise building model...
As the degree of complexity in construction systems increases, the concepts of construction simulation must be advanced and formalized in practice as the primary means for designing, analyzing, planning, and controlling construction projects and facilities. Whereas the prevalent approach for simulating construction operations has traditionally been discrete-event process interaction simulation, the...
Evacuation is an important issue that all occupants should be able to evacuate to safety from large public buildings under emergency. In this paper, present an individual decision-making model based on agent technology. For this model, a computer program is developed to simulate the flow phenomenon of crowd pedestrian. Three cases have been studied where arching, clogging of pedestrians at the exit...
Traditional engineering construction process animation is made by processed modeling, rendering, the stream media files made by this way can not real-time controlled. Comprehensively using the theories in connection with the High-rise building Engineering Graphics, computer graphics, object-oriented method and on the basis of the research, the authors developed the High-rise building construction...
The poor performances of AEC industry have revealed the inefficiency of the old paradigm. The occurrence of building information modeling (BIM) and integrated project delivery (IPD) method means great opportunity to change the old paradigm. The paper analyzes why it is necessary for the cooperation between BIM and IPD and how they cooperate together to change the old paradigm.
This paper proposes a framework to enable intuitive navigation guidance for complex buildings which are huge in size and their space boundaries contain non-convex shape including non-navigable areas inside. Our approach utilizes `topological' way-finding method to generate paths. This can be done by means of the integration of building information model (BIM) with our new algorithm to subdivide the...
In this paper, we present UrbiSim, a new simulation framework for delay tolerant and ad hoc network research applied to urban environments. By providing two levels of mobility modeling, this work tries to cope with two of the current limitations of simulation models: realistically mimicking mobility at an individual level and offering a global movement pattern, reflecting the social behavior of users...
In this paper, an agent-based simulation model is presented to simulate occupant evacuation in fire environment. Based on the agent technology, a computer program is developed to simulate and analyze the egress progress in large public buildings. Through simulation, the occupant behaviors and fire safety performance of different architecture plans can be investigated and analyzed in case of emergency...
In order to develop an integrated system that can optimise building operations, all facets of monitoring, control and reconfiguration need to be integrated. To achieve this, we need to develop an integrated system model, together with associated sub-system interfaces. This links the low-level wireless/wired systems monitoring with multi-level control, building information management and user-preference...
Virtual reality technology is widely used in indoor building walkthrough. As the limited capabilities with data volume and network transfer, 3D scenes on the Web have less photorealistic and interactive than stand-alone systems. This paper designs and implements a system for indoor virtual roaming. Its manipulating mechanism make scene with good interactivity. Moreover, powerful capabilities in data...
Building demolition is an important subject for urban construction and development. Blasting simulation is very helpful for safe scientific blasting. It will provide a novel method to decision making for blasting combined with geographic information system (GIS) and virtual reality (VR). Three-dimensional model and scene of the building were constructed based on visualization and modeling function...
While the traditional model driven development techniques are useful for building solutions in a reusable manner, they do not say much about how the existing assets in a client environment can be leveraged effectively and efficiently. In this work, we enhance model driven transformation techniques to generate implementation artifacts on a given platform from platform independent models while leveraging...
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