We study the observability of one and two point vortex flow from one or two Eulerian or Lagrangian observations. By observability we mean the ability to determine the locations and strengths of the vortices from the time history of the observations. An Eulerian observation is a measurement of the velocity of the flow at a fixed point in the domain of the flow. A Lagrangian observation is the me...

Thematic learning is an integrated model that links or combines several subjects in one particular theme, order to make it easier for students see meaningful relationships, and them understand the material/concept as a whole. This study aims analyze perceptions of early grade MI teachers Bireuen Regency towards thematic innovation based on its attributes (relative advantage, compatibility, comp...

in this article a graph theoretical approach is employed to study some specifications of dynamic systems with time delay in the inputs and states, such as structural controllability and observability. first, the zero and non-zero parameters of a proposed system have been determined, next the general structure of the system is presented by a graph which is constructed by non-zero parameters. the...

Given a linear dynamical system, we consider the problem of selecting a subset of sensors out of the total set in order to optimize two commonly used metrics of observability, namely the maximum eigenvalue and the trace of the observability Gramian. We apply a variant of a well-known randomized sampling algorithm and derive novel lower bounds on the two metrics relative to the total value with ...

A new algorithm called Huber-based iterated divided difference filtering (HIDDF) is derived and applied to cooperative localization of autonomous underwater vehicles (AUVs) supported by a single surface leader. The position states are estimated using acoustic range measurements relative to the leader, in which some disadvantages such as weak observability, large initial error and contaminated m...

A novel methodology for designing multivariable High-Order Sliding-Mode (HOSM) controllers for disturbed feedback linearizable nonlinear systems is introduced. It provides for the finite-time stabilization of the origin of the state-space by using output feedback. Only the additional assumptions of algebraic strong observability and smooth enough matched disturbances are required. The control p...