the problem of crack identification in continuous beam like structures is considered. the cracks’ locations and their depths are identified by employing experimental modal test results performed on the structure. the cracks are modeled using generic elements to include the coupling effects between shear forces and bending moments at the crack section. in the identification procedure eigen- sens...

We have previously described modal analysis, an efficient, physically-based solution for recovering, tracking, and recognizing solid models from 2-D and 3-D sensor data. The underlying representation consists of two levels: modal deformations, which describe the overall shape of a solid, and displacement maps, which employ a multiscale wavelet representation to provide local and fine surface de...

A large number of multimedia documents containing texts and images have appeared on the internet, hence cross-modal retrieval in which the modality of a query is different from that of the retrieved results is being an interesting search paradigm. In this paper, a multimodal multiclass boosting framework (MMB) is proposed to capture intra-modal semantic information and inter-modal semantic corr...

The field of Operational Modal Analysis (OMA) has recently become an emerging research interest. OMA, also known as Response-Only Modal Analysis, extracts the modal parameters by processing only the system response data. In many experimental measurement situations, the system’s output data series is short in length and buried under potentially correlated noise. In such cases, the separation of ...

This study deals with an application of the proper orthogonal decomposition (POD) method to a simplified structural dynamic system with local known non-linearities. The POD method is applied to experimental and simulated time-series data, in order to extract modes that efficiently represent the system. The ability of these modes to detect and identify structural non-linear behaviours is then in...

Broadband data, collected on a towed horizontal array of length 2375 m during a geophysical survey, are used to perform joint inversion for the water column and sediment acoustic parameters using modal inverse technique S. D. Rajan, J. F. Lynch, and G. V. Frisk, J. Acoust. Soc. Am. 82, 998–1017 1987 . To perform the inversion based on modal wave numbers, we first obtain the pressure field as a ...

Health activity monitoring (HAM) has received increasing attention due to the rapid advances of both hardware and software technologies and strong environmental and public health needs. In this paper, we describe the architecture and implementation of the Epi-SPIRE prototype, which is a novel health activity monitoring system that generates alerts from environmental, behavioral, and public heal...

The formation of cross-modal object representations was investigated using a novel paradigm that was previously successful in establishing unimodal visual category learning in monkeys and humans. The stimulus set consisted of six categories of bird shapes and sounds that were morphed to create different exemplars of each category. Subjects learned new cross-modal bird categories using a one-bac...