Comparisons between CRM and CCM PFC

Boundary between CCM and DCM in DC/DC PWM Converters

It is presented a modality to compute the boundary between the discontinuous (DCM) and continuous (CCM) operating modes in the DC/DC fourth-order PWM converters with parasitic resistances. To reach this goal, an averaged model of the converter has been used. The boundary between DCM and CCM, considered to be the critical load resistance Rcrit, or, equivalently, the critical value of the inducto...

Fast-scale bifurcation in single-stage PFC power supplies operating with DCM boost stage and CCM forward stage

This paper describes the fast-scale bifurcation phenomena of a single-stage single-switch power-factorcorrection (PFC) regulator comprising a boost stage operating in discontinuous conduction mode (DCM) and a forward stage operating in continuous conduction mode (CCM). The two stages combine into a single stage by sharing one main switch and one control loop. Using ‘exact’ cycle-by-cycle comput...

Combinatorial interaction between CCM pathway genes precipitates hemorrhagic stroke.

Intracranial hemorrhage (ICH) is a particularly severe form of stroke whose etiology remains poorly understood, with a highly variable appearance and onset of the disease (Felbor et al., 2006; Frizzell, 2005; Lucas et al., 2003). In humans, mutations in any one of three CCM genes causes an autosomal dominant genetic ICH disorder characterized by cerebral cavernous malformations (CCM). Recent ev...

Between-Noun Comparisons

Adjectives are typically felicitous in within-predicate comparisons—constructions of the form ‘X is more A than y’, as in This is bigger than that, but are often infelicitous in between-predicate comparisons—constructions of the form ‘X is more A than (y is) B’, as in *Tweety is bigger than (it is) heavy. Nouns, by contrast, exhibit the inverse pattern. The challenge is to ac...

Comparisons between Certainqueueing