Aim. A new manufacturing method aiming at to producing more flexible and resistant NiTi endodontic instruments has been recently developed (Hyflex, produced with CM wire). The purpose of the study was to determine whether this new manufacturing method produces NiTi instruments (Hyflex) of superior flexibility and/or superior resistance to cyclic fatigue, when compared with instruments produced ...

The existing research on the two-workshop integrated scheduling problem with symmetrical resources does not consider complex product attribute structure and objective situation of plant equipment resources. This results in prolongation makespan reduction utilization rate general workshop. To solve above problems, a algorithm based process tree cyclic decomposition (STHIS-PTCD) was proposed. Fir...

in the present study, ptruce/mwnts nanocatalysts synthesized via polyol process technique are applied as anode electro-catalyst in methanol electro-oxidation reaction (mor). to characterize the nanocatalysts, tem, xrd, eds and xps are investigated. cyclic voltammetry and choronoamperometry are used to evaluate the electro-catalytic activity and stability of the catalysts in methanol electro-oxi...

the electrochemical oxidation of sulfamethazine (smz) has been studied at a multi-walled carbon nanotubes modified glassy carbon electrode (mwcnt-gce) by cyclic voltammetry. this modified electrode (mwcnt-gce) exhibited excellent electrocatalytic behavior toward the oxidation of smz as evidenced by the enhancement of the oxidation peak current and the shift in the anodic potential to less posit...

the residual stresses in composite laminates depend on several factors including the conditions of fabricating process, property of materials, direction and lay-ups of the layers. however the thermo-elastic behavior of composite is one of the most important parameters affecting the magnitude of residual stresses. the elastic properties and residual stresses do not remain constant under cyclic t...

Abstract In order to further study the failure characteristics of freeze-thawed rocks in alpine region under multistage cyclic loads, a numerical simulation analysis was carried out with RFPA2D software, taking natural fractured granite from Beizhan Iron Mine Hejing County, Xinjiang Province as an example. The results show that degree fracture determines form rock, and when is large, rock will ...