In the laser cutting process some well-known parameters, e.g. laser power and cutting speed, play major roles in the performance of the process. Each parameter or a combination of parameters can affect the material removal volume and cutting volume efficiency. The purpose of this research is to study the effect of power and maximum cutting speed on the material removal rate (MRR) and cutting vo...

in this paper, we propose a new full-fuzzy video ratecontrol algorithm (rca) for variable bit rate (vbr) videoapplications. the proposed rca provides high qualitycompressed video with a low degree computational complexity.by controlling the quantization parameter (qp) on a picturebasis, it produces vbr video bit streams. the proposed rcahas been implemented on the jm h.264/avc video codec andth...

It is well known that the mechanical properties of materials depend of the rolling direction, which means that the direction of specimen cutting affect the obtained values. This feature also exists in the welded joint, where the anisotropy is caused by direction of the deposit welded layers. One high-carbon steel is surface welded by flux-cored wire and specimens were cut in order to determine ...

In 1990 Karchmer and Widgerson considered the following communication problem Bit: Alice and Bob know a function f : {0, 1}n → {0, 1}, Alice receives a point x ∈ f−1(1), Bob receives y ∈ f−1(0), and their goal is to find a position i such that xi 6= yi. Karchmer and Wigderson proved that the minimal size of a boolean formula for the function f equals the size of the smallest communication proto...

Both economical and ecological factors might encourage conventional machines to continue in service by healing tool vibration problems. Higher productivity in automated manufacturing system brought to the attention the importance of machine tool error elimination. Various factors might affect the machining process (Merritt, 1965), some of them are non-measurable, and others might change in real...

vibration cutting (vc), elliptical vibration cutting (evc) and ordinary cutting (oc) of in738 work-pieces have been experimentally investigated in the present research. the experiments were carried out by using single crystal diamond tool and ultra-precision cnc lathe. vibration frequency is 36.16khz and the amplitude is . the influence of various cutting parameters including cutting speed, fee...

Abstract Ultra-precision diamond cutting is a promising machining technique for realizing ultra-smooth surface of different kinds materials. While fundamental understanding the impact workpiece material properties on mechanisms crucial promoting capability technique, numerical simulation methods at length and time scales act as important supplements to experimental investigations. In this work,...

crops and agricultural products are subject to natural loading during growth. different mechanical forces are also exerted on them during harvest. one product, sugar cane, experiences large shear forces are during harvest. an examination of the crop properties and machine parameters of sugar cane are necessary to develop appropriate cutting tools and the optimization and design of harvesting ma...