Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting roller with a curvature of 5 to 7 mm. For the to...

Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting &#10roller with a curvature of 5 to 7 mm. For the ...

Abstract Although the positive effects of biodiversity on ecosystem functioning and stability have been extensively documented in literature, previous studies mostly explored mechanisms independently. It is unclear how may covary with those stability. Here we developed an integrated framework to explore links between underlying Specifically, were partitioned into complementarity ( CE ) selectio...

We consider families of skew-symmetric matrices depending analytically on parameters. obtain necessary existence conditions and find normal forms for such families. The results obtained are generalized to the case possessing evenness or oddness property in totality variables.