چکیده: در این مقاله، یک کنترل­کننده مقاوم فازی pid که به کنترل­کننده فازی pid بلادرنگ (ofpid) معروف است، برای کنترل فرکانس یک ریزشبکه در حالت جزیره­ای ارائه شده است. استراتژی کنترل­کننده پیشنهادی به­گونه­ای است که ضرایب کنترل‎کننده فازی pid در هر لحظه توسط منطق فازی تنظیم می‎شوند. جهت بهبود عملکرد کنترل‎کننده پیشنهادی، الگوریتم بهبودیافته تکامل تفاضلی (ide) پیشنهادی که دارای سرعت همگرایی مناسبی...

The magnetic flux leakage inspection method is widely used in the detection of pipelines, storage tanks and other steel materials. Especially in corrosion pits detection, it has become a matured technology. As cracks may exist in the steels which may lead to big hazards, its detection becomes very important. Meanwhile, the cracks evaluation by MFL inspection can be determined by many parameters...

In-line inspections with Ultrasonic Testing (UT) and Magnetic Flux Leakage (MFL) have become standard for pipeline integrity management programs worldwide. UT allows direct and highly accurate measurements of two-dimensional features, notably pipeline wall thickness. In contrast, MFL provides a versatile and dependable method for determining the geometry of metal loss in pipelines. ROSEN has de...

The so-called Mixed Feedback Loop (MFL) is a small two-gene network where protein A regulates the transcription of protein B and the two proteins form a heterodimer. It has been found to be statistically over-represented in statistical analyses of gene and protein interaction databases and to lie at the core of several computer-generated genetic networks. Here, we propose and mathematically stu...

Magnetic flux leakage (MFL) inspection is one of the most important and sensitive nondestructive testing approaches. For online MFL inspection of a long-range railway track or oil pipeline, a fast and effective defect profile estimating method based on a multi-power affine projection algorithm (MAPA) is proposed, where the depth of a sampling point is related with not only the MFL signals befor...

ROSEN offers a combined inline inspection (ILI) service for Magnetic Flux Leakage (MFL) methodology and the Ultrasonic Testing (UT) with one inspection tool. These two methodologically independent measurements with one ILI run enable to supply a combined inspection service with many operational and qualitative benefits. The case study presented is based on a representative amount of high qualit...