Search results for "Simulation."

Theoretical approach and clinical application of kinetic modelling in dialysis.

1991

Using kinetic modelling for shaping profile dialysis, we present a promising approach to improve the cardiovascular stability of patients during dialysis treatment. In order to obtain an insight into the physiological mechanisms of increased stability, a model considering alterations of electrolytes and water distribution and of acid-base status was developed. This algorithm was used for the evaluation of 114 dialysis sessions, which were performed with highly individualised profiles. Each profile was developed for one patient by trying empirically to prevent episodes of hypotension as well as other clinical problems throughout dialysis. The main advantage of profile dialysis compared to st…

Software/Hardware Issues in Modelling Insect Brain Architecture

2011

The concept of cognitive abilities is commonly associated to humans and animals like mammals, birds and others. Nevertheless, in the last years several research groups have intensified the studies on insects that posses a much simpler brain structure even if they are able to show interesting memory and learning capabilities. In this paper a survey on some key results obtained in a joint research activity among Engineers and Neurogeneticians is reported. They were focussed toward the design and implementation of a model of the insect brain inspired by the Drosophila melanogaster. Particular attention was paid to the main neural centers the Mushroom Bodies and the Central Complex. Moreover a …

Analytical model for the long- distance tracer-transport in plants

2011

International audience; Recent investigations of long-distance transport in plants using non-invasive tracer techniques such as C radiolabeling monitored by positron emission tomography (PET) combined with magnetic resonance imaging (MRI) revealed the need of dedicated methods to allow a quantitative data analysis and comparison of such experiments. A mechanistic compartmental tracer transport model is presented, defined by a linear system of partial differential equations (PDEs). This model simplifies the complexity of axial transport and lateral exchanges in the transport pathways of plants (e.g. the phloem) by simulating transport and reversible exchange within three compartments using j…

Herramientas matemáticas para la valoración de la ampliación de una infraestructura portuaria

2003

infraestructura portuaria ya consolidada, que conlleva unas inversiones a largo plazo. Para ello hay que recurrir a medios de an´alisis capaces de recoger, en la medida de lo posible, la incertidumbre sobre la futura evoluci´on de los tr´aficos de mercanc´?as, sobre el efecto de la competencia entre puertos, etc., y que los m´etodos tradicionales no aproximan en toda su dimensi´on. Existe, adem´as, un problema de decisi´on de pol´?tica ´optima de gesti´on del proyecto que depende de variables de decisi´on que modelizan las opciones presentes en el mismo. Las oportunidades de inversi´on han sido tratadas como una colecci´on de opciones americanas sobre activos reales. Nosotros hemos optado p…

ADAPT - Advanced Prediction Models for Trajectory-Based Operations (TBO)

2018

Social
 Ontology,
Collective 
Intentionality,
and
Mindreading

2013

Standard 
accounts 
of 
social 
reality 
take
collective
 intentionality 
as 
the starting 
point
 of
 the
 creation
 and
 maintenance
 of
 social
 facts.
 But 
collective intentionality 
is 
enabled, 
as
Searle
 suggests,
by
 a 
more 
basic
 capacity 
to 
understand 
another 
person
 as 
an 
agent
like 
oneself
 and
 as 
ready 
to 
engage 
in 
cooperative 
activities.
 We 
can 
coordinate 
our 
collective 
actions
 only
 insofar
 we
 are
 able
 to
 explain
 and
 predict
 the
 behavior
 of
 other
 persons,
 we
 can
 understand 
behavior 
only 
insofar
 we 
can
mindread
 them,
and 
we 
can 
mindread 
them
only
 if
 we
 assume
 the
 constitutive
 role
 of
 rationality
 in
 action.
 Therefore
…

Simuler la mobilité urbaine quotidienne : le projet MIRO

2010

Expérimentation par voie informatique de la mobilité résidentielle

2008

La mobilité résidentielle est un sujet complexe qui nécessite d'appréhender les interactions entre le " couple " ménage-logement. Les expérimentations in vivo et in vitro n'étant pas possible sur ce domaine d'étude, nous proposons de réaliser un modèle de simulation de la mobilité résidentielle à des fins d'expérimentation in silico. Pour ce faire, VisualSimores, un logiciel multi-formalisme associant automate cellulaire, système multi-agents et formalisme mathématique a été conçu.

An EEMD Aided Comparison of Time Histories and Its Application in Vehicle Safety

2017

In the context of signal processing, the comparison of time histories is required for different purposes, especially for the model validation of vehicle safety. Most of the existing metrics focus on the mathematical value only. Therefore, they suffer the measuring errors, disturbance, and uncertainties and can hardly achieve a stable result with a clear physical interpretation. This paper proposes a novel scheme of time histories comparison to be used in vehicle safety analysis. More specifically, each signal for comparison is decomposed into a trend signal and several intrinsic mode functions (IMFs) by ensemble empirical mode decomposition. The trend signals reflect the general variation a…

On the Finite Element Modeling of the Lumbar Spine: A Schematic Review

2023

Finite element modelling of the lumbar spine is a challenging problem. Lower back pain is among the most common pathologies in the global populations, owing to which the patient may need to undergo surgery. The latter may differ in nature and complexity because of spinal disease and patient contraindications (i.e., aging). Today, the understanding of spinal column biomechanics may lead to better comprehension of the disease progression as well as to the development of innovative therapeutic strategies. Better insight into the spine’s biomechanics would certainly guarantee an evolution of current device-based treatments. In this setting, the computational approach appears to be a remarkable …