Bit-blasting is the main approach for solving word-level constraints in SAT Modulo Theories (SMT) for bit-vector logics. However, in practice it often reaches its limits, even if combined with sophisticated rewriting and simplification techniques. In this paper, we extended a recently proposed alternative based on stochastic local search (SLS) and improve neighbor selection based on down propag...

Blasting complaints are consuming an increasing amount of time and resources. This worsening situation has spawned new methods for relaying the public’s concerns. The direct measurement of crack response to both long term environmental and blast vibration effects with the same sensor exemplifies one new approach, which can be helpful in the process of educating quarry neighbors about the large ...

a considerable amount of energy is released in the form of shock wave from explosive charge detonation. shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. the rest of the shock wave energy is transferred to rock mass as ground vibration. ground vibration is conveyed to the adjacent structures by body and surface waves. geological structures li...

ground vibrations caused by blasting are undesirable results in the mining industry and can cause serious damage to the nearby buildings and facilities; therefore, controlling such vibrations has an important role in reducing the environmental damaging effects. controlling vibration caused by blasting can be achieved once peak particle velocity (ppv) is predicted. in this paper, the values of p...

The sublevel open stoping with backfill method has recently been widely used in underground metal mines. primary CPB stope is frequently affected by blasting the secondary ore stope, leading to collapse and dilution, which become a common problem received widespread attention. Numerical simulations are carried out present work, 1/4 numeral model consisting of built. divided into four layers on ...

Hardest 10. Diamond he selection of abrasive media for blast cleaning steel is based primarily on two broad objectives, quality and economics. Quality is defined in terms of appearance after cleaning (SSPC-SP 7, 6, 10, and 5 ) , profile depth and contour, and chemical cleanliness. The economics of an abrasive is determined by its initial cost and by the production rate that can be achieved when...

We develop a procedure called RiPE (Retrieval-induced Phylogeny Environment) that automatically performs an evolutionary analysis of a protein (sub)family, (i) by retrieving the relevant sequences via a homology search, (ii) by using the search report to construct the alignment using only homologous subsequences (taking into account their neighborhood with a low chance of homology), (iii) by re...

The branch-and-bound framework has already been successfully applied in SAT-modulo-theories (SMT) solvers to check the satisfiability of linear integer arithmetic formulas. In this paper we study how it can be used in SMT solvers for non-linear integer arithmetic on top of two real-algebraic decision procedures: the virtual substitution and the cylindrical algebraic decomposition methods. We im...

Three polymorphs of a di-chloro-N-salicylideneaniline derivative show visually impressive jumping and sudden blasting behaviours on heating due to phase transitions.

Rock fragmentation is one of the desired results of rock blasting. So, controlling and predicting it, has direct effects on operational costs of mining. There are different ways that could be used to predict the size distribution of fragmented rocks. Mathematical relations have been widely used in these predictions. From among three proposed mathematical relations, one was selected in this stud...