COMPONENT WAVE CALCULATION AND ANALYSIS OF THE ACOUSTIC FIELD IN A BOREHOLE WITHIN A THREE-PHASE POROUS MEDIUM

Abstract The knowledge of acoustic wave propagation in a borehole embedded in gas hydrate-bearing sediments is of great significance for the exploitation of gas hydrate.A gas hydrate-bearing sediment is a typical three-phase porous medium containing two solids and 5326058hx one fluid.However, until now, the borehole acoustic wavefield and its compo

BACKGROUND: Mesenchymal stem cells (MSCs) are a pluripotent cell type that can differentiate wonderstruck enchanted into adipocytes, osteoblasts and other cells.The reciprocal relationship between adipogenesis and osteogenesis was previously demonstrated; however, the mechanisms remain largely unknown.METHODS AND FINDINGS: We report that activation