Loess and loess-like soils, when exposed to water, lose their strength characteristics, physical mechanical properties change original structure. The stress-strain state is transformed in these soils wetted. Therefore, the problem of building on loess studying mechanisms subsidence relevant. In this article, we consider determining stress soil stratum under its own weight a limited wetted area....

Performance or dependability analysis is a tremendous challenge for the design or improvement of modern complex systems. Two different classes of solution methods are usually used: analyticnumeric methods and simulation methods. Surprisingly the choice between them in the literature depends more on the analyst’s background than on the system itself. In this paper, we aim to illustrate on real p...

In a research project of EADS Airbus and the TUHH a system simulation of a cooling system is to be realized, using the refrigerant carbondioxid (CO2). The simulation models of the cooling cycle are created using Modelica and the thermohydraulic model library ThermoFlow. Modelica and the model library operate since spring 2000. The project will be finished untill the end of 2002. For the structu...

The chemical industry poses a potential security risk to factory personnel and neighboring residents. In order to mitigate prospective damage, a synthetic method must be developed for an emergency response. With the development of environmental numeric simulation models, model integration methods, and modern information technology, many Decision Support Systems (DSSs) have been established. How...

The theory of distributed detection is receiving a lot of attention. A common assumption used in previous studies is the conditional independence of the observations. In this paper, the optimization of local decision rules for distributed detection networks with correlated observations is considered. We focus on presenting the detection theory for parallel distributed detection networks with fi...

Agent-based social simulation models have a wide range of applications, and can incorporate numeric parameters of various kinds. In this paper, we use a simple agent-based simulation model of a laboratory experiment in network colouring to explore the selection of such numeric parameters. In particular, we examine two fundamental approaches to selecting model parameters (model calibration) base...

We present Pika, an implemented self-explanatory simulator that is more than 5000 times faster than SimGen Mk2 [ Forbus and Falkenhainer, 1992 ] , the previous state of the art. Like SimGen, Pika automatically prepares and runs a numeric simulation of a physical device speci ed as a particular instantiation of a general domain theory, and it is capable of explaining its reasoning and the simula...