We examine a dynamic model for the disruption of information flow in hierarchical social networks by considering the vertex-pursuit game Seepage played in directed acyclic graphs (DAGs). In Seepage, agents attempt to block the movement of an intruder who moves downward from the source node to a sink. We propose a generalized stochastic model for DAGs with given expected total degree sequence. S...

The low-frequency pulse wave makes the velocity of fluid in reservoir fluctuate dramatically, which results a remarkable inertia force. Darcy’s law was inapplicable to flow with strong effect inertial In this paper, non-Darcy equation and calculation method capillary number pressure displacement are established. experiments single-phase two- phase carried out. show that periodic change can decr...

Abstract Mobility is the main factor restricting production of tight oil. In order to explore influence pore throat structure and fluid seepage on mobility, six sandstone samples are selected by high-pressure mercury intrusion, nuclear magnetic resonance, water driving oil experiments, oil-water relative permeability experiments discuss multiphases mobility The results indicate that with increa...

The tight sandstone gas has huge objective reserves in China and great potential for development. Sulige field is the largest China. To prevent hydrates reduce surface pipeline pressure, downhole throttling technology been widely used field, Since wells are prone to liquid accumulation during production, installation of chokes makes phenomenon more complicated, traditional methods difficult sim...

Alkanes are major constituents of crude oil and are released to the marine environment by natural seepage and from anthropogenic sources. Due to their chemical inertness, their removal from anoxic marine sediments is primarily controlled by the activity of anaerobic alkane-degrading microorganisms. To facilitate comprehensive cultivation-independent surveys of the diversity and distribution of ...

A novel discrete singular convolution (DSC)  formulation  is  presented for the seepage analysis in irregular geometric porous media. The DSC is a new promising numerical approach which has been recently applied to solve several engineering problems. For a medium with regular geometry, realizing of the DSC for the seepage analysis is straight forward. But DSC implementation for a medium with ir...