نتایج جستجو برای: flow modelling
تعداد نتایج: 634708 فیلتر نتایج به سال:
This paper describes results from a case study to calibrate and evaluate of the microscopic traffic simulation model MITSIMLab, to a mixed urban-freeway network in the Brunnsviken area in the north of Stockholm under congested traffic conditions. In the absence of detailed data, only aggregate data (i.e. speed and flow measurements at sensor locations) was used to calibrate the simulation model...
evaluated in this paper by using speech material produced with computational modelling of voice production represented by an aeroelastic model of vocal folds and a Finite Element (FE) model of the vocal tract. An inverse filtering algorithm was used in order to estimate the glottal flow from the speech pressure signal generated by the model. Comparison between the estimated glottal flow and the...
The nature of solids-liquid flows often results in non-uniform profiles of solids volume fraction and axial solids velocity across the flow cross-section. In order to measure the solids volumetric flow rate in these situations it is necessary to measure the profiles of the local solids volume fraction and axial solids velocity and to obtain mean values of the solids volume fraction, solids axia...
Money managers are rewarded for increasing the value of assets under management. This gives a manager an implicit incentive to exploit the well-documented positive fund-flows to relative-performance relationship by manipulating her risk exposure. The misaligned incentives create potentially significant deviations of the manager’s policy from that desired by fund investors. In the context of a f...
We develop a general theory dealing with stochastic models for dynamical systems that are governed by various nonlinear, ordinary or partial differential, equations. In particular, we address the problem how flows in the random medium (related to driving velocity fields which are generically bound to obey suitable local conservation laws) can be reconciled with the notion of dispersion due to a...
In this thesis, we present a methodology to jointly calibrate the O-D estimation and prediction and driver route choice models within a Dynamic Traffic Assignment (DTA) system using several days of traffic sensor data. The methodology for the calibration of the O-D estimation module is based on an existing framework adapted to suit the sensor data usually collected from traffic networks. The pa...
the aim of this paper is to describe and illustrate a collaborative process model verification approach. This approach allows the coherence of a given collaborative process involving numerous resources, activities, and flows to be analyzed in a mission for which there are common objectives to achieve. It also enables the potential effects of this process to be to detected, characterized, and fo...
Many flows at microscale and below are characterised by an inherent multiscale nature and accurate numerical modelling of the phenomena involved is the cornerstone for enhancing the applicability of micro and nanofluidics in the industrial environment. This paper presents a hybrid molecular-continuum strategy named as point wise coupling for studying complex microand nanoscale flows. In this st...
This paper describes how we can use four modelling methods together. We model Information and Communication Technology (ICT) systems and Business Process (BP) systems. The aim of the modelling is to experiment with the models, that is, simulation. Two of the methods are the detailed modelling of the ICT and of the BP systems, as we usually do that for discrete event simulation. The other two me...
We propose an approach to the quantitative modelling of crowd dynamics, viz. the behaviour of systems of large numbers of mobile agents. The approach relies on a stochastic process algebra as specification language (Bio-PEPA), and combines stochastic simulation techniques and continuous fluid flow approximation. The approach encompasses the agent modelling viewpoint, as system behaviour emerges...
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