Introduction: The purpose of this retrospective study was to evaluate the outcome following stenting over a period of 10 years in patients with chronic laryngotracheal stenosis.   Materials and Methods: Between 2000–2010, out of 111 patients with laryngotracheal trauma, 71 underwent tracheal        T-stenting for laryngotracheal stenosis in the Department of Otorhinolaryngology at the Governmen...

• Large-scale field experiments demonstrate the ultra-wide first bandgap. Achieve a bandgap with relative bandwidth of 1.17. Study characteristic by using complex band structures. Seismic metamaterials (SMs) are expected to assist or replace traditional isolation systems owing their strong attenuation seismic waves. In this work, one-dimensional inverted T-shaped SM (1D ITSM) composed arrays st...

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...