A singularly perturbed model is proposed for a system comprised of a PEM Fuel Cell(PEM-FC) with Natural Gas Hydrogen Reformer (NG-HR). This eighteenth order system is decomposedinto slow and fast lower order subsystems using singular perturbation techniques that provides tools forseparation and order reduction. Then, three different types of controllers, namely an optimal full-order,a near-opti...

A common method to determine the order of minimal realization of a continuous linear time invariant descriptor system is to decompose it into slow and fast subsystems using the Weierstrass canonical form. The Weierstrass decomposition should be avoided because it is generally an ill-conditioned problem that requires many complex calculations especially for high-dimensional systems. The present ...

This work continues a line of on developing partially explicit methods for multiscale problems. In our previous works, we considered linear problems where the spatial heterogeneities are at subgrid level and not resolved. these have introduced contrast-independent, time discretizations equations. The discretization divides space into two components: contrast dependent (fast) independent (slow) ...

background: complete atrioventricular block (av block) is a serious complication of slow pathway ablation therapy in the treatment of atrioventricular nodal re-entrant tachycardia (avnrt).   the present study was aimed at determining whether the electroanatomical pace mapping of koch’s triangle could significantly improve the safety, efficiency, and efficacy of selective slow pathway ablation i...

Abstract Reading literature is often contrasted to the use of digital media in terms speed. While readers engage slowly with a book, they rush through environments at an ever faster pace. This article argues against simple binary between slow/literary and fast/digital. fact not native public debate about age but can be traced back from revolution modernist attitudes on literature, as emerge Vik...