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Crankshaft is one of the most important parts in engine and diesel, its deformation contains multiple arcs, and its straightening technology is a complex NP-hard determination problem. The crankshaft straightening process was analyzed, and some effects from multiple arcs crankshaft straightening was investigated. The mathematics model of multiple arcs(More)
The serial design theory was used to analyze and calculate the main components of sheet metal forming hydraulic machine,identify the key parameters of its component parts, establish the size parameter library of the structural characteristics of the parts and modularization thought was adopted to research parametric CAD intelligence design system of sheet(More)
Roller is one of the most important parts in textile machine, its deformation contains multiple arcs, and its straightening technology is a complex NP-hard determination problem. The roller straightening process was analysed, and some effection from multiple arcs roller straightening was investigated. The mathematics model of multiple arcs straightening(More)
Due to its two-dimensional hexagonal crystal lattice structure, graphene has extraordinary properties for field emission. With the high aspect ratio, excellent conductivity and large quantities of edges, graphene has been treated as an ideal efficient field emitter. Here we report a kind of cathode high density current electron emission about graphene,(More)
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