The basic idea of inverse optimal control theory for nonlinear systems is to find a feedback control law based on a priori knowledge of a Control-Lyapunov function (CLF), that leads to Lyapunov stability of the system and minimizes a cost functional [1], [4]. The problem of inverse optimal control leads to the Hamilton-Jacobi-Bellman (HJB) equation...

By Nicolae Pop, Luige Vlădăreanu, Adrian I. Pop

Modern processing is a combination of individual production cell, designed to complete the business of manufacturing parts of subassemblies and their integration into the final product of the product. The success of such a system depends on stability operations while minimizing the possible errors in the system. The continuous monitoring system is ...

By Tihomir Savo Latinovic, Mladen Todic, Cristian Barz, Adina Pop-Vadean, Paul Petrica Pop

Some considerations regarding different earthing electrodes types and arrangements are discussed. The computation of the earthing resistance and voltage distribution, the designing, installation and testing procedures are evaluated and compared. Typical mistakes, inadvertences, wrong or incomplete procedures are outlined, e.g. the soil resistivity ...

By Liviu Neamt, Horia Balan, Olivian Chiver, Alexandru Hotea

This article presents a new method for determining the effective capacity of a lead-acid battery by applying the least squares theory. Power supply of an isolated power grid can be achieved with a mix of sources, among which the most affordable are solar energy, wind power and fossil fuels. In these cases, the final price of the electricity obtaine...

By Dorin Sabou, Radu Tîrnovan

The fact that small enterprises in general and small business in bakery industries in special, are organized and lead by a particular style of management, based on own experience and very often intuition where financial resources to run a strong marketing campaign are limited brought to our attention the concept of social responsibility which offer...

By Gabriel Rus, Adrian D. Pop

The development of modern process control systems for mechanized oil production using sucker-rod pumping units (SRPU), in particular during periodic well operation, requires information not only on the parameters of the reservoir, well and operation mode, but also the technical condition of surface and underground equipment. On the basis of the ana...

By Leonid Zamikhovskiy, Andrii Romanyuk

The paper presents different types of controlling and monitoring an industrial process through web interface, depending on the connection types made by PLC or HMI used in the process. We can control the industrial processes through HMI interface directly on the web or phone if we use a Weintek HMI in connection with a SIEMENS PLC for manipulating T...

By Cristian Barz, Tihomir Latinovic, Paul Petrica Pop, Adina Pop-Vadean, Sinisa Dragutinovic, Felicia Dragan

During research of emergence and evolution of clusters in the particular case of Romania, it was noted the importance of a innovation systems of processes structure that is superposed from the very beginning on the structure of clusters, comprising also universities and research and design institutes. Considerations are made regarding the overlappi...

By Dinu Stoicovici, Mihai Bănică, Miorita Ungureanu

When mobbing has already begun, it may be difficult to keep it under control if immediate action is not taken. Trusted advisers and mediators can play a very important role. To intervene early, the supervisor must be able to read the first signs of mobbing process in development. Top management can be to appoint one or more persons in the organizat...

By Vesna Rodic, Brana Komljenovic

Copper sulphate is used as an antifungal agent. Long-term applied fungicides allow the accumulation of copper in soil. This metal pollution is a problem when it enters in the food chains. In this study we investigated the effects of CuSO4 x 5H20 at different concentrations (0.05g/L; 0.1g/L; 0.5 g/L; 1 g/L) on seeds germination. The experiments have...

By Stela-Gabriela Jelea, Marian Jelea, Oana-Corina Jelea, Lucia Mihalescu, Zorica Voşgan