in this study ptfeco ternary alloys nanoparticles of three dimentional (3d) rhombus shapes dispersed on graphene nanosheets (ptfeco/gr) were successfully prepared and studied as electrocatalysts for oxygen reduction reaction (orr) in polymer-electrolyte fuel cells. a combination of analytical techniques including powder x-ray diffraction, x-ray photoelectron spectra, inductively coupled plasma-...

initially, the first aim of the present study is to model 3-axle rigid truck by developing a code inmatlab. secondly, each equation should be drived by acquisition of lagrange approach. afterderiving equations successfully, validation is performed by some result which was mentioned inbohao li's master thesis. although the present approach is totally different from the approachthat boahao li use...

This paper proposes and describes a novel technique for organic shapes classification by similarity to basic geometric shapes. The amber data used in experiments are collected by amber art craft industry experts and the presented investigations were care out in order to develop a classifier for online amber sorting application. The centroid distance function was selected for shape representatio...

The fundamental frequencies and mode shapes of steel and carbon fiber–reinforced plastic (CFRP) cylindrical shells with steel inserts were investigated using finite element analysis and modal testing. The free-free boundary condition was tested with modal testing using the roving hammer method and verified by finite element analysis using ABAQUS. The results show good agreement between the test...

in recent years, design of small aircrafts are studied and extensively developed. one of the most important of these aircrafts is micro aerial vehicles (mavs). as part of aerodynamic design of mavs, the wing design is important. in fact, the main part of this design is to find an appropriate shape for the wing. in this work, influence of the wing shape at low reynolds number flow is investigate...