a new mathematical model for identifying pollution sources in aquifers is presented. the model utilizes lagrange constrained optimization method (lcom) and is capable to inversely solve unsteady fluid flow in saturated, heterogeneous, anisotropic confined and/or unconfined aquifers. throughout the presented model, complete advection-dispersion equation, including the adsorption as well as retar...

This paper introduces a mesh-based motion estimation scheme for image sequences and nodal motion vectors optimization by using a multi-resolution diieren-tial method. Because our nal aim is mesh tracking throughout a video sequence, neither backward tracking nor forward tracking is well suited. The backward tracking provides good results when simply applied to two successive images, but it is d...

In this paper, we present a mesh-based motion estimation scheme for image sequence. Nodal motion vectors optimization is performed by using a multi-resolution differential method. Because our final aim is mesh tracking throughout a video sequence with optimized reconstruction, neither backward tracking nor forward tracking is well suited. One motivation of our work is to take advantage of both ...

Trailer systems consist of a steering tractor and a passive trailer linked together with rigid free joint. The backward driving of trailer system is more difficult than the forward driving, because the backward driving of trailer system is unstable. In this paper, we study the backward tracking control for trailer systems and implement the asymptotically stable tracking controller using Lyapuno...

We propose a closed form Gaussian sum smoother and, more importantly, closed form smoothing solutions for increasingly complex problems arising from practice, including tracking in clutter, joint detection and tracking (in clutter), and multiple target tracking (in clutter) via the Probability Hypothesis Density. The solutions are based on the corresponding forward-backward smoothing recursions...

This paper is about multiple-F0 tracking and the estimation of the number of harmonic source streams in music sound signals. A source stream is understood as generated from a note played by a musical instrument. A note is described by a hidden Markov model (HMM) having two states: the attack state and the sustain state. It is proposed to first perform the tracking of F0 candidates using a high-...

Large-scale deployments of sensor networks can potentially serve as infrastructure for multiple, concurrent applications. Realizing this potential requires tools for monitoring, debugging and repairing deployed wireless sensor networks (WSNs). We propose an approach for post-mortem debugging of WSNs using autonomous and mobile actors. By allowing the computation (mobile actor) to move to the no...

application of backward probability method in pollutant source tracking in non-uniform flow riversalireza ghanem.sc. student of water structures, tarbiat modares university, tehranmehdi mazaheri assistant prof., department of water structures, tarbiat modares university, tehranjamal mohammad vali samaniprofessor, department of water structures, tarbiat modares university, tehranintroductionriv...

In this paper, we present a technique for tracking video objects in a sequence. The proposed technique is based on a backward projection technique. Since classical backward technique can be disturbed by occlusions and potential errors in spatial segmentation or motion estimation, we propose an extension to the backward projection technique in order to cope with these problems. Results obtained ...

A cooperative detection and model-free tracking algorithm, referred to as CDT, for multiple object tracking is proposed in this work. The proposed CDT algorithm has three components: object detector, forward tracker, and backward tracker. First, the object detector detects targets with high confidence levels only to reduce spurious detection and achieve a high precision rate. Then, each detecte...