public function lamPCBwire(PCB $pcb, $piE) { $b = 1.7E-5; $layers = $pcb->getLayers(); $piQ = $pcb->getQuality(); $pAuto = $pcb->getSolderingPointAuto(); $pHand = $pcb->getSolderingPointHand(); $piC = 1; if ($layers > 2) { $piC = 0.65 * pow($layers, 0.63); } $lambda = $b * ($pAuto * $piC + $pHand * ($piC + 13)) * $piQ * $piE * pow(10, -6); return $lambda; }