Abstract In mathematics, a common approach to solving new problem is break down the into sub-problems that you know how solve and then try glue pieces together yield solution of problem. This also very useful in software development; well-tested can be glued order obtain solutions wider class problems. Operator splitting technique illustrates this principle well. Rather complex equations broken...

We employ the R-vine copula approach to study dependence structure between non-ferrous metal commodity futures on London Metal Exchange, focusing comparison before and after structural breaks. find that center of shifts from copper zinc first break in 2008 moves back second 2014. Additionally, we document metals experienced an increase level integration tail 2014, while this is shown cease furt...

Abstract Stainless steel as a widely used difficult-to-machine materials, difficult machining is mainly reflected in the chip hard to break, tool wear serious etc. A finishing indexable inserts designed and developed for stainless material. The compared with commercial tools (NF4, BF) terms of curved groove structure cutting performance by SEM (scanning electron microscope, Sigma500), 3D scanni...

Estimating the costs of blasting operations is an important parameter in open-pit mining. Blasting and rock fragmentation depend on two groups of variables. The first group consists of mass properties, which are uncontrollable, and the second one is the drill-and-blast design parameters, which can be controlled and optimized. The design parameters include burden, spacing, hole length, hole diam...