In this paper we discuss methodology for analyzing non-stationary time series whose periodic nature changes approximately linearly with time. We make use of the M-stationary process to describe such data sets, and in particular we use the discrete Euler(p) model to obtain forecasts and estimate the spectral characteristics. We discuss the use of the M-spectrum for displaying linear time-varying...

Videostroboscopy is an examination which yields a permanent record of the moving vocal folds. Thus, it allows the diagnosis of abnormalities which contribute to voice disorders. In this paper, in order to nd and quantify the deformation of the vocal folds in videostroboscopic recordings, an active contours (snakes) based approach is used to delineate the vocal folds in each frame of the videost...

Reliability assessment and risk analysis of rotating machine rotors in various overload and malfunction situations present challenge to engineers and operators. In this paper a new analytical method for evaluation of rotor under large deformation is addressed. Model is presented in general form to include also composite rotors. Presented simulation procedure is based on variational work method ...

Dans cet article, nous présentons une méthode de mesure des déformations volumiques du Corps Calleux (CC) consécutives à la Sclérose En Plaques (SEP). Une méthode de segmentation 3 D du volume d'intérêt basée sur les modèles déformables est proposée. Des mesures sont ensuite réalisées sur ce volume à partir d'Imagerie par Résonance Magnétique (IRM) cérébrales. La variabilité de la forme géométr...

Modal analysis provides a powerful tool for efficiently simulating the behavior of deformable objects. This paper shows how manipulation, collision, and other constraints may be implemented easily within a modal framework. Results are presented for several example simulations. These results demonstrate that for many applications the errors introduced by linearization are acceptable, and that th...

Deflection analysis of a simply supported microbeam subjected to a concentrated load at the middle is investigated on the basis of a shear deformable beam theory and non-classical theory. Effects of shear deformation and small size are taken into consideration by hyperbolic shear deformable beam theory and modified strain gradient theory, respectively. The governing differential equations and c...

The mechanical behaviors of microstructures and micro-devices have drawn the attention from researchers on materials and mechanics in recent years. To understand the rule of these behaviors, the deformation measurement techniques with micro/nanometer sensitivity and spatial resolution are required. In this paper, a micro-marker identification method is developed to measure microstructure deform...

Electronic speckle pattern interferometry is performed for temporal analysis of the surface deformation of vibrating structures. This requires specially designed image processing methods in order to reconstruct the dynamic deformation of an object. The reconstruction procedure which is based on a numerical optimization algorithm is applied on a set of interferometric images recorded by a high s...

Statistical analysis of anatomical shape differences between two different populations can be reduced to a classification problem, i.e., learning a classifier function for assigning new examples to one of the two groups while making as few mistakes as possible. In this framework, feature vectors representing the shape of the organ are extracted from the input images and are passed to the learni...