The best renewable energy connected system has to be efficient and a good stability in terms of voltage power. also can the aspect determine oscillation efficiency. Both standalone photovoltaic wind turbine its intermittency input, but by using both coupled configuration as hybrid electrical source, there is new constraint stability, power balance systems. So, it necessary resolve this problem ...

Moreover, I am grateful to Brigitte Rohrbach for her careful editing of the manuscript which helped improve the standard of my English. Finally, a special thank to my wife Franziska for her patience and invaluable support. vii Summary The stability analysis of time-delay systems forms the centre of this work. Three tools are typically used to investigate the stability of such systems: Razumikhi...

Abstract Static equilibrium configurations of continua supported by surface tension are given constant mean curvature (CMC) surfaces which critical points a variational problem to extremize the area while keeping volume fixed. CMC used as mathematical models variety continua, such tiny liquid drops, stars, and nuclei, play important roles in both mathematics physics. Therefore, geometry their p...