RÉSUMÉ. Dans cet article, nous généralisons le flot de vecteurs gradients (GVF) pour les images à valeurs vectorielles. Nous basons notre méthode sur la définition d’un tenseur de structure multicomposante pondéré par une estimation aveugle du contraste, exploitant l’intégralité de l’information spatio-spectrale pour réduire la sensibilité au bruit et affiner les orientations du champ de forces...

In untimed process algebras such as CCS and ACP the silent step enables abstraction from internal actions. Several formalizations of abstraction have been introduced, such as observational congruence, delay bisimu-lation and branching bisimulation. However, in real time process algebras, such as ACPp, the silent step has not yet received much attention, so far. Therefore, we formalize these sem...

A general aim of the research was to develop a technology of manufacturing microspheres with losartan potassium as an active substance, and Eudragit L30D55 as a matrix with the use of spray drying technique. During the first step of the study, optimal values of parameters in spray drying process were established (i.e., operating temperature, peristaltic pump performance, aspiration value). Thos...

This paper presents a method in expansion planning of transmission systems using the AC optimal power flow (AC-OPF). The AC-OPF provides a more accurate picture of power flow in the network compared to the DC optimal power flow (DC-OPF) that is usually considered in the literature for transmission expansion planning (TEP). While the AC-OPF-based TEP is a mixed-integer nonlinear programming prob...

This paper presents a mathematical model and a methodology to analyze the losses in transmission expansion planning (TEP) under uncertainty in demand. The methodology is based on discrete particle swarm optimization (DPSO). DPSO is a useful and powerful stochastic evolutionary algorithm to solve the large-scale, discrete and nonlinear optimization problems like TEP. The effectiveness of the pro...

This paper describes the turbulent eddy profiler (TEP), a volume-imaging, UHF radar wind profiler designed for clear-air measurements in the atmospheric boundary layer on scales comparable to grid cell sizes of large eddy simulation models. TEP employs a large array of antennas—each feeding an independent receiver—to simultaneously generate multiple beams within a 288 conical volume illuminated...

We report the first inorganic/organic hybrids that show outstanding mechanical properties (withstanding cyclic loading) and bone bioactivity. This new hybrid material may fulfil unmet clinical need for bioactive synthetic grafts can withstand loading. A SiO 2 /PTHF/PCL-diCOOH sol-gel system, combined inorganic organic co-networks at molecular level, previously demonstrated unprecedented synergy...