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This paper presents the design, architecture and implementation of a general parallel computing platform, termed PGO, based on the Genetic Algorithm for global optimization. PGO provides an efficient and easy-to-use framework for paralleliz-ing the global optimization procedure for general scientific modeling and simulation processes. Along with a core(More)
  • David Becker, Barbara Minsker, Robert Greenwald, Yan Zhang, Karla Harre, Kathleen Yager +2 others
  • 2006
The Department of Defense (DoD) Environmental Security Technology Certification Program and the Environmental Protection Agency sponsored a project to evaluate the benefits and utility of contaminant transport simulation-optimization algorithms against traditional (trial and error) modeling approaches. Three pump-and-treat facilities operated by the DoD(More)
This study evaluates and compares two methodologies, Monte Carlo simple genetic algorithm (MCSGA) and noisy genetic algorithm (NGA), for cost-effective sampling network design in the presence of uncertainties in the hydraulic conductivity (K) field. Both methodologies couple a genetic algorithm (GA) with a numerical flow and transport simulator and a global(More)
A new tracer experiment (referred to as MADE-5) was conducted at the well-known Macrodispersion Experiment (MADE) site to investigate the influence of small-scale mass-transfer and dispersion processes on well-to-well transport. The test was performed under dipole forced-gradient flow conditions and concentrations were monitored in an extraction well and in(More)
A new simulation-optimization methodology is developed for cost-effective sampling network design associated with long-term monitoring of large-scale contaminant plumes. The new methodology is similar in concept to the one presented by Reed et al. (Reed, P.M., Minsker, B.S., Valocchi, A.J., 2000a. Cost-effective long-term groundwater monitoring design using(More)
Correct interpretation of tracer test data is critical for understanding transport processes in the subsurface. This task can be greatly complicated by the presence of intraborehole flows in a highly dynamic flow environment. At a new tracer test site (Hanford IFRC) a dynamic flow field created by changes in the stage of the adjacent Columbia River, coupled(More)
  • Xinong Xie, Jimmy Jiao, Zhonghua Tang, Chunmiao Zheng, A B S T R A C T, B Sc +7 others
  • 2003
99 Evolution of abnormally low pressure and its implications for the hydrocarbon system in the southeast uplift zone of Songliao basin, China Underpressured formations are present in the southeast uplift of the Songliao basin, northeast China. At depths between 1540 and 3000 m, the Lower Cretaceous strata in the Shiwu depression of the basin are(More)
Several recent studies at the Macrodispersion Experiment (MADE) site in Columbus, Mississippi, have indicated that the relative preferential flowpaths and flow barriers resulting from decimeter-scale aquifer heterogeneities appear to have a dominant effect on plume-scale solute transport. Numerical experiments are thus conducted in this study to explore the(More)