‎semidiscrete finite element approximation of a hyperbolic type‎ ‎integro-differential equation is studied. the model problem is‎ ‎treated as the wave equation which is perturbed with a memory term.‎ ‎stability estimates are obtained for a slightly more general problem.‎ ‎these, based on energy method, are used to prove optimal order‎ ‎a priori error estimates.‎

This correspondence deals with the problem of determining the source coherency structure and estimation of directions of arrival in the presence of coherent signals. The method is closely related to the smoothed rank profile (SRP) algorithm presented in [3], which Manuscript received July 20, 1987; revised October 3, 1988. This work was supported by the Naval Physical and Oceanographic Laborato...

Traditional least-squares full-waveform inversion (FWI) suffers from severe local minima problems in the case of presence strongly dispersive surface waves. In addition, recorded wavefields are often characterized by amplitude errors due to varying source coupling and incorrect 3D-to-2D geometric-spreading correction. Thus, FWI is considered less suitable for near-surface applications. We intro...

The paper proposes a formulation of context coherency and uses it to generate semantically meaningful groupings by discovering salient image regions and their contexts. The proposed framework consists of four stages. First, a visual vocabulary from a set of labelled training images is learnt. Second, a context space which is inspired by Hyperspace Analogue to Language model is constructed using...

Mixing and coherence are fundamental issues at the heart of understanding fluid dynamics and other non-autonomous dynamical systems. Recently the notion of coherence has come to a more rigorous footing, in particular, within the studies of finite-time nonautonomous dynamical systems. Here we recall “shape coherent sets” which is proven to correspond to slowly evolving curvature, for which tange...

Carbon emission leads to environmental and social consequences, which could be severe in the emerging economies. Owing dilemma of economic expansion, it is necessary achieve a more comprehensive understanding dynamic relationship between growth carbon emission. Multivariate Wavelet analysis introduced addition decoupling for BRICS countries. The detects an obvious trend from China, generates mi...

Recent developments in time-resolved Particle Tracking Velocimetry (4D-PTV) consistently improved tracking accuracy and robustness. We propose a novel technique named ”Lagrangian coherent predictor” to estimate particle positions within the 4D-PTV algorithm. add spatial temporal coherency information of neighbour particles predict single trajectory using Lagrangian Coherent Structures (LCS). fo...

This is a statisticalmodel (the “multiple logistic model”) for pooling data from many variables into a single probability estimate that a person examined in a health screening system requires medical care. Because discrete variables are frequently studied in health screening programs, the required assumption of multivariate normality of the predictor variables related to many statistical techni...