3 papers
physics.class-ph2020
Endo-irreversible thermo-mechanical engine with new concept of entropy production action coefficient
Michel Feidt, Renaud Feidt
Thermostatics of CARNOT engines has been extended by more recent research based on endo-reversible model. Our model assumes exo-reversibility but endo-irreversibility to determine…
math.FA2020
Development in periodic series,method for resolving differential equations
Arpad Török, Stoian Petrescu, Michel Feidt
The development of functions of real variables in Taylor and Frobenius series (whole series which are formed in nonorthogonal, nonperiodic bases), in sinusoidal Fourier series (bas…
math.GM2020
Nonsinusoidal periodic Fourier series
Arpad Török, Stoian Petrescu, Michel Feidt
According to harmonic analysis (Fourier analysis), any function , periodic over the interval , which satisfies the Dirichlet conditions, can be developed into an inf…