Nowadays a circuit placement algorithm often faces a problem size of multi-million objects, with excessive fixed blockages. We present a new efficient quadratic placement algorithm that scales well to the large-scale circuit placement problems. Instead of adding spreading forces into the quadratic system to push cells away from congestions, we simulate the cell diffusion process and use dummy a...

introduction the fanuj titaniferous placer deposits are located 35 km northwest of the fanuj, sistan and baluchestan province (1) . the studied area comprises a (2) small part of the late cretaceous fanuj-maskutan (rameshk) ophiolite complex (arshadi and mahdavi, 1987). reconnaissance and comprehensive exploration programs in the fanuj district (east of the 1:100000 fanuj quadrangle map,yazdi, ...

This paper describes occurrences of low grade, disseminated gold in sedimentary rocks and alkalic intrusions in the vicinity of the Howell Creek Structure (HCS; Price,1964) of southeastern British Columbia. The study is part of the B.C. Geological Survey’s ongoing Sediment-hosted Gold Project, which is examining occurrences throughout the province which may have similarities to gold deposits in...

This paper deals with an adaptation of the genetic partitioning algorithm BOA, based on the estimation of distribution of promising solution, for the placement of the hypergraph nodes into the regular structure of allocations. This task is a simplification of the placement problem encountered in PCB design or more complex case of physical layout of gate array on VLSI chip level. We present top-...

Examples of heavy mineral placer deposits are presented in which wave reflection, refraction, diffraction and resonance would appear to have played a major concentrating role. Their geometry is compared with the computer generated patterns predicted for the reflection, refraction and diffraction of surface waves moving over fairly simple, idealised bathymetries. Much of this work is founded on ...

The property consists of 84 units in I I claims, staked in 1976 by H. Hopkins after finding copper-lead-zinc mineralization (Clendenan and Pentland, 1979). Since 1977, work by International Maggie Mines Ltd. and Placer Developrnent Limited (now Placer Dome Inc.) has included mapping, trenching, 78 drill holes tot:alling 8005 metres, and two short adits with drifts followinf; mineralization (Dru...