In this study, selenium was recovered from an industrial dust. After the purification process, the researchers were able to prepare selenium micro powder. The objective of this study was to prepare selenium nano particles by water solution phase method from the micro powders. The results showed that selenium micronized powder and nano particles had high purity. The obtained nanoparticles were t...

background paracentesis is a common bedside therapeutic and diagnostic procedure that requires insertion of a catheter into the peritoneal cavity; however, lack of a specialized fixator for securing the catheter causes frequent catheter kinking and patient discomfort. objectives this study aimed to demonstrate the efficacy of a designed paracentesis fixator in reducing patient discomfort and pr...

The hydroforming technology can realize overall forming of large storage tank’s bottom, but the quality is affected by many technological parameters. In view wrinkling and cracking defects integral bottom in hydroforming, a multi-objective optimization model established for process parameters including pre-expansion pressure, hydraulic blank holder force, fillet radius holder. Based on finite e...

For the purpose of eliminating annular welding seams in structures with differential thickness, a hydroforming method using circular 5A06 aluminum alloy plate radial thickness coupling flexible polyurethane auxiliary was proposed to form an integrated semi-ellipsoid shell. The had smaller middle and larger periphery. In forming process such plates, concentrated deformation fracture might have o...