Results 271 to 280 of about 670,121 (313)

Mechanical Representation of Damage and Damage Variables

2011
The procedure of the continuum damage mechanics is to represent first the damage state of a material in terms of properly defined damage variables, and then to describe the mechanical behavior of the damaged material and the further development of the damage by the use of these damage variables.
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Variable Selection with Optimal Cell Damage

1994
Neural Networks -NN- have been used in a large variety of real-world applications. In those, one could measure a potentially large number N of variables Xi; probably not all Xi are equally informative: if one could select n« N “best” variables Xi, then one could reduce the amount of data to gather and process; hence reduce costs.
Tautvydas Cibas, Françroise Fogelman Soulié, Patrick Gallinari, Sarunas Raudys   +3 more
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Lipoprotein (a), haemostatic variables and cardiovascular damage in hypertensive patients

Journal of Hypertension, 2000
Lipoproteins and coagulation factors are independent predictors of atherothrombotic events in the general population and their interaction may contribute to the development of cardiovascular damage. This study was designed to assess relationships between lipoproteins, haemostatic variables, and atherosclerotic complications in hypertensive patients.In ...
SECHI, Leonardo Alberto, CATENA, Cristiana, CASACCIO, D, ZINGARO, L.   +3 more
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Increased variability accompanies frontal lobe damage in dementia

Journal of the International Neuropsychological Society, 2002
Performance variability on neuropsychological measures is not a unitary phenomenon, and different measures (consistency, dispersion, diversity) evaluate separate elements of variability. It has been suggested that increased variability may be a specific attribute of frontal lobe pathology. This hypothesis was tested in 2 matched groups of demented
Susan, Murtha, Roxanna, Cismaru, Randall, Waechter, Howard, Chertkow   +3 more
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A new unsymmetrical decomposition of the damage variable

International Journal of Damage Mechanics
This work focuses on the dissection of the damage variable within solid materials. The underlying assumption is that damage within a solid primarily stems from the presence of various defects. The conventional approach to breaking down the damage variable into two parts – one attributed to the first defect type and the other to the second defect type –
George Z Voyiadjis, Peter I Kattan
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The role of blood pressure variability in end-organ damage

Journal of Hypertension, 2003
The ultimate goal when treating high blood pressure is to reduce the incidence of end-organ damage and prevent cardiovascular disease, and thus reduce the incidence of premature death. Cuff blood pressure measurements have some prognostic value and have traditionally been used to predict the risk of end-organ damage.
Mancia, G, Parati, G
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Toward a Physical Damage Variable for Concrete

Journal of Engineering Mechanics, 2006
Continuum damage mechanics models, while elegant and useful, suffer from what are typically highly idealized relationships between model and material. In this technical note, using three-dimensional (3D) measurements of internal cracking, direct, albeit simple relationships were made between the quantity of cracking and a corresponding scalar damage ...
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Blood pressure variability and organ damage.

Journal of cardiovascular pharmacology, 1995
Several studies have now shown that hypertension-induced end-organ damage is more closely related to 24-h average blood pressure than to clinic measurements. Furthermore, the degree of variability of blood pressure during a 24-h period bears a relation to organ damage that is independent of average blood pressure value.
G, Mancia, A, Frattola, G, Parati, C, Santucciu, L, Ulian   +4 more
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Thermodynamic Significance and Basis of Damage Variables and Equivalences

International Journal of Damage Mechanics, 2010
In this article, thermodynamic significance and basis of damage variables and equivalences are addressed within the irreversible thermodynamic framework with internal variables by Rice [Rice, J.R. (1971). Inelastic Constitutive Relations for Solids: An Internal Variable Theory and its Application to Metal Plasticity.
null Qiang Yang, Wei-Yuan Zhou, null Xin Chen   +2 more
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Damage Identification of a Structure with Significant Subsystem Variability

51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<BR> 18th AIAA/ASME/AHS Adaptive Structures Conference<BR> 12th, 2010
This paper presents an investigation of the damage identification of a structure with subsystems having significant uncertainty. To enhance the detection performance, a feedback controller is incorporated into the structure to amplify the response sensitivity with respect to the damage and at the same time to reduce the uncertainty effect.
Jiann-Shiun Lew, Jer-Nan Juang, Jiong Tang   +2 more
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