It is found recently that a high permeability(higher than 1000×10(-3) μm2) formation contaminated with solids free formate drilling fluid has a low permeability recovery,which is contrary to the results of field practice.
② the reservoirs are Low – Amplitude Structural Reservoirs, the height of the reservoir is small, the oil and water transition belt is wide and the water bearing saturation of the oil formation is high;
In the interesting case when the group is of Coxeter typeDn (n≥4) we use higher polarization operators introduced by Wallach.
In this paper, we prove three types of rigidity results related to CAT(-1) spaces, namely the rigidity of the isometric actions on CAT(-1) spaces under the commensurability subgroups, the higher rank lattices and certain ergodic cocycles.
Finitely generated profinitely dense free groups in higher rank semi-simple groups
More generally, we prove that if Γ is an irreducible arithmetic non-cocompact lattice in a higher rank group, then Γ containsf·g·p·d·f groups.
Higher-dimensional ball quotients and the invariant quintic
In this paper, some test statistics of Kolmogorov type and Cramervon Mises type based on projection pursuit technique are proposed for testing the sphericity problem of a high-dimensional distribution.
Asymptotic theory for a risk process with a high dividend barrier
Seven topological descriptors are finally selected from 127 topological descriptors by GAPLS method to build a QSRR model with a high regression quality of squared correlation coefficient (R2) of 0.99998 and standard deviation (S) of 2.88.
The blank reference experiment shows that hydrothermal crystallization treatment favors the formation of hexagonal tungsten trioxide, and the tungsten trioxide powder sample prepared by this method has a high degree of crystallinity.
Furthermore, the DNA extracted from the whole blood can be amplified by polymerase chain reaction, which can achieve a high efficiency of the amplification.