Network monitoring and diagnosis are key to improving network performance. The difficulties of performance monitoring lie in today’s fast growing Internet, accompanied by increasingly heterogeneous and unregulated structures. Moreover, these tasks become even harder since one cannot rely on the collaboration of individual routers and servers to directly measure network traffic. Even though the ...

1) Composition and quality of the in situ 2) Controls on distribution and volume of petroleum, both geographically and within a given borehole, 3) Water saturation and potential for internal or external water production, 4) Rock type and mineralogical composition for log calculations, lateral location and completion optimization, 5) Natural fracture distribution and porosity types, 6) Compartme...

Abstract Lithofacies prediction can facilitate the search for hydrocarbon reservoirs and is, therefore, crucial seismic exploration. We proposed a new approach lithofacies based on stochastic simulation of pseudo-wells. First, we performed pseudo-well using continuous-time Markov chain (CTMC), which accurately describe geological deposition be created logging, core or data. used CTMC to randoml...

A polyomino is a polygonal region with axis-parallel edges and corners of integral coordinates, which may have holes. In this paper, we consider planar tiling packing problems pieces container P . We give polynomial-time algorithms for deciding if can be tiled k × squares any fixed part the input (that is, union set non-overlapping squares) maximum number 2 1 dominos, allowing rotations by 90°....

Downed logs are known to increase species diversity in many forest ecosystems by increasing resource and structural complexity and by altering fire behavior in fire-prone ecosystems. In a frequently burned oak savanna in central Missouri, combustion of downed logs formed patches that have remained free of herbaceous vegetation for more than 3 years. To assess the influence of ‘‘log burnouts’’ o...

We prove a transference type result for pseudo-random subsets of Z N that is analogous to the well-known Fürstenberg-Sárközy theorem. More precisely, let k 2 be an integer and let and be real numbers satisfying + ()/(2 k+1 3) > 1. Let ✓ Z N be a set with size at least N and linear bias at most N. Then, every A ✓ with relative density |A|/|| (log log N) 1 2 log log log log log N contains a pair ...

The characterization of gas migration through low-permeability clay formations has been a focus of R&D programs for radioactive waste disposal, which is also of great importance for shale-gas exploration, and cap-rock behavior of hydrocarbon reservoirs and CO2 sequestration. Laboratory tests on Opalinus clay cores from a shallow borehole in the Mont Terri Underground Research Laboratory (URL) a...

Abstract Experiment and numerical simulation are integrated to investigate the effects of pore structure on physical properties in reef-shoal carbonate samples from Tarim Basin. The results show three correlation trends between parameters properties, which closely depend type. acoustic velocity fractured-vuggy type (Structure I) is mainly affected by porosity shape, whereas fractured tight type...

The purpose of this study was to build small-scale genetic models of a reservoir by comparing the small and medium scale information derived from core analyses and well logs. The examined gas field is situated in the eastern part of the Pannonian Basin System. For the numerical solution several one (univariate) and multivariable (multivariate) statistical methods were used to describeone and mu...