Address correspondence to Lijie Ci, [email protected]; Pulickel M. Ajayan, [email protected] ABSTRACT Rapid progress in graphene-based applications is calling for new processing techniques for creating graphene components with different shapes, sizes, and edge structures. Here we report a controlled cutting process for graphene sheets, using nickel nanoparticles as a knife that cuts with nanos...

INTRODUCTION Recently, a milling for die using a small end mill of diameter less than 1 mm is increased, because sizes of plastic mold parts such as connectors for an IT and an electronics becomes micro extremely. In general, a tool life is long and a good cut surface is obtained as a cutting speed is high. A speed-increasing spindle, which is attached to a shank may be used to increase the cut...

In this study, a dynamic programming approach to deal with the unconstrained twodimensional non-guillotine cutting problem is presented. The method extends the recently introduced recursive partitioning approach for the manufacturer’s pallet loading problem. The approach involves two phases and uses bounds based on unconstrained two-staged and non-staged guillotine cutting. Since a counterexamp...

The use of abrasive waterjets for cutting into munitions of varying types as part of the decommissioning process is becoming more common. The performance of one such system, operated at 700 bar is discussed, from the aspect of cutting performance in sectioning 40 mm shells. The amount of sparking generated, and the thermal buildup of heat on the inner wall of the munition is discussed, as part ...

The residual cutting (RC) method has been proposed for efficiently solving linear equations obtained from elliptic partial differential equations. Based on the RC, we have introduced the generalized residual cutting (GRC) method, which can be applied to general sparse matrix problems. In this paper, we study the mathematics of the GRC algorithm and and prove it is a Krylov subspace method. More...

Lace is liable to stretch as it is passed through the feed mechanism, in which a vision system is engaged to detect the changes of the motif and find the cutting path (river) across the lace pattern. The vision system has to work with many different lace patterns, sizes and tolerate misalignment, stretch and other distortions. A Fuuy Reasoning Rule-based technique is employed in order to overco...

Drill cuttings are considered representative of the lithology being drilled in a wellbore. However, the fragments that are two to three times larger and/or having odd shapes compared to the regular cuttings are commonly understood as cavings from the wall of the borehole and they are seldom of any help in compilation of a lithology. In fact, cutting description manual recommends ignoring cuttin...