Double power laws, fractals and self-similarity

Power law (PL) distributions have been largely reported in the modeling of distinct real phenomena and have been associated with fractal structures and self-similar systems. In this paper, we analyze real data that follows a PL and a double PL behavior and verify the relation between the PL coefficient and the capacity dimension of known fractals. It is to be proved a method that translates PLs coefficients into capacity dimension of fractals of any real data.

Double power laws, fractals and self-similarity

Power law (PL) distributions have been largely reported in the modeling of distinct real phenomena and have been associated with fractal structures and self-similar systems. In this paper, we analyze real data that follows a PL and a double PL behavior and verify the relation between the PL coefficient and the capacity dimension of known fractals. It is to be proved a method that translates PLs coefficients into capacity dimension of fractals of any real data.

Vision-Based Assisted Teleoperation for Inspection Tasks with a Small ROV

It is well-known that ROVs require human intervention to guarantee the success of their assignment, as well as the equipment safety. However, as its teleoperation is quite complex to perform, there is a need for assisted teleoperation. This study aims to take on this challenge by developing vision-based assisted teleoperation maneuvers, since a standard camera is present in any ROV. The proposed approach is a visual servoing solution, that allows the user to select between several standard image processing methods and is applied to a 3-DOF ROV. The most interesting characteristic of the presented system is the exclusive use of the camera data to improve the teleoperation of an underactuated ROV. It is demonstrated through the comparison and evaluation of standard implementations of different vision methods and the execution of simple maneuvers to acquire experimental results, that the teleoperation of a small ROV can be drastically improved without the need to install additional sensors.

Structured Light System for Underwater Inspection Operations

In this work we propose the development of a stereo SLS system for underwater inspection operations. We demonstrate how to perform a SLS calibration both in dry and underwater environments using two different methods. The proposed methodology is able to achieve quite accurate results, lower than 1 mm in dry environments. We also display a 3D underwater scan of a known object size, a sea scallop, where the system is able to perform a scan with a global error lower than 2% of the object size.

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1918/07 (N7).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1918/02 (N5).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1919/07 (N12).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1917/09/30 (N2,PART2).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1918/04 (N6).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1917/11/20 (PART2,N3).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1917/09/30 (N1,PART1).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1918/01 (NIV).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1919/03 (N10).

Bulletin de renseignements du génie / Grand quartier général des armées ; Inspection générale des travaux et organisations aux armées

1918/11 (A1918,N9).