This study presents a semi-empirical modeling approach based on an extensive parametric using spark-ignition port-injection engine. The experimental results are used to derive engine-out emission models for each regulated pollutant (CO, HC, NOx) as function of engine operating parameters. Such parameters include speed, intake manifold pressure, equivalence ratio, and spark advance. proposed pro...

Timed event graphs (TEGs) constitute a subclass of timed Petri nets that model synchronization and delay phenomena, but not conflict or choice. In suitable mathematical framework (idempotent semirings such as the min-plus algebra), temporal evolution TEGs can be described by set linear equations. Recently, method has been proposed for optimal feedforward control systems share one more resources...

Background: Osteoarthritis (OA) is the most common form of arthritis and a major cause pain disability worldwide. Individuals with OA have increased cardiovascular morbidity mortality, other comorbidities are also more amongst them than in general population. In this study, we examined prevalence timing diagnosis co-morbidities prior to clinical OA. Objectives: To determine odds newly diagnosed...