Reaming is a common finishing process for improving the drilled holes surface quality. Choosing an appropriate finishing method in drilling process has a significant effect on the surface quality of holes and in decreasing the process total cost and time. In this study, four similar holes were drilled on the AISI 4340 workpiece with different two pair feed rates. The drilling process was perfor...

An interior point cutting plane algorithm for solving Maximum Cut problems of a particular structure is described. The problem of interest is determining the ground states of two dimensional J Ising spin glasses on square lattices with nearest neighbour interactions and periodic boundary conditions. Computational results for grids of sizes up to 100 100 are presented. An estimate of the ground ...

We use an analytic center cutting plane method (ACCPM) to solve the multiple kernel learning problem. ACCPM has linear convergence but requires very few gradient evaluations, which makes it particularly efficient on large sample sizes. We compare the numerical performance of this algorithm with another recent first-order algorithm on several data sets and use multiple kernel learning to predict...

The recently available capability for the free-form milling of gears of various gear types and sizes — all within one manufacturing system — is becoming increasingly recognized as a flexible machining process for gears. This paper addresses the manufacturing and quality of gears made by free-form milling, with an added focus on the specific process properties of the parts. Finally, the potentia...

In this paper the solution of two-stage guillotine cutting stock problems is considered. Especially such problems are under investigation where the sizes of the order demands diier in a large range. We propose a new approach dealing with such situations and compare it with the classical Gilmore/Gomory approach. We report results of extensive numerical experiments which show the advantages of th...

We present a variable neighborhood search (VNS) for the 3-staged 2-dimensional cutting stock problem employing “ruin-and-recreate”-based very large neighborhood search in which parts of the incumbent solution are destroyed and rebuilt using construction heuristics and dynamic programming. Experimental results show that for instances where the sizes of the elements are not too small compared to ...

The most popular algorithms for object detection require the use of exhaustive spatial and scale search procedures. In such approaches, an object is defined by means of local features. fu this paper we show that including contextual information in object detection procedures provides an efficient way of cutting down the need for exhaustive search. We present results with real images showing tha...

the investigation was conducted on wet and dry seasons of ethiopia during the year 2012/2013 at wondo genet agricultural research center nursery site. four levels of cutting size and three levels of cutting positions were arranged in randomized complete block design with three replications. data on seedling height, branch number/seedling, root number/seedling, root weigh/seedling, root length/s...