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The Influence of Coupled Thermomechanical Processes on the Pressure and Temperature due to Cold Water Injection into Multiple Fracture Zones in Deep Rock Formation
Published 2020-01-01“…A technique to produce geothermal energy from deep rock formations at elevated temperatures consists of drilling two parallel deep boreholes, the second of which is directed so as to intersect a series of fractures produced by hydraulic fracturing in the first borehole. Then, the first borehole is used for injection of cold water and the second used to produce water that has been heated by the deep rock formation. …”
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1423
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1424
Up-flow anaerobic sludge blanket bioreactor for the production of carboxylates: effect of inocula on process performance and microbial communities
Published 2025-01-01“…As a consequence of the operational conditions (25 ºC, pH = 5.5-6, organic loading rate (OLR) = 3 gCOD·L-1·d-1 and hydraulic retention time (HRT) = 10 d), the microbial communities changed from those typical for biogas production to those specialised in the production of volatile fatty acids (VFAs). …”
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1425
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Management of toxic and hazardous contents of oil sludge in Siri Island
Published 2017-12-01“…The composite liner consisted of 1.5mm high density polyethylene layer with 50cm compacted clay liner of 10-7 cm/s hydraulic conductivity underneath.…”
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1427
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Efficiency improvement in standalone solar PV water pumping system by pulsating pump operation based on intermediate supercapacitor buffer
Published 2025-03-01“…The water pumping performance of the investigated hydraulic system during a sunny summer day in the latitudes of Ukraine in the proposed SPVWPS is on 64 % higher than in the SPVWPS of basic traditional configuration. …”
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1430
Eichhornia crassipes Efficacy in Secondary Wastewater Treatment in the Western Highlands of Cameroon
Published 2023-01-01“…Each lagoon system was supplied with primary-treated domestic wastewater from the wastewater treatment plant of the University of Dschang, Cameroon, at a hydraulic loading rate of 1.13 m3/day. Monthly wastewater samples were collected from the inflow and outflow of each lagoon for physicochemical and bacteriological analyses, and plant growth was assessed biweekly for six months spanning the dry and rainy seasons. …”
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1431
Experimental study on the impact of perpendicular and parallel bedding planes on the physical and geomechanical characteristics of carbonate rocks
Published 2025-02-01“…These findings suggest that rock failure can occur along bedding planes, which are effective weak planes, and a smaller bedding angle in these rocks is favorable for fracture extension in the direction of SHmax during the hydraulic fracturing process. The tensile strength vs. …”
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1432
The evolving roles of geophysics in environmental assessment, monitoring, and management of landfill leachate contaminant plumes: An overview
Published 2025-06-01“…However, some key influencing factors such as subsurface porosity, hydraulic conductivity, redox conditions, heterogeneity contaminant, geological properties, water soil contents, and groundwater flow dynamics, seem to have a significant influence on the geophysical data acquisition, potentially projecting false positive/negative results. …”
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1433
Health and Characteristics of Australian Apple Growing Soils
Published 2024-01-01“…Soils were assessed for water retention, hydraulic conductivity, bulk density, macroporosity, organic carbon, CEC, ESP, pH, and EC. …”
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1434
Bioenergy potential of Chlorella vulgaris under the influence of different light conditions in a bubble column photobioreactor
Published 2023-10-01“…The treatment was conducted in a batch process with a hydraulic retention time of 21 days, using light intensity of 1800–2800 luminescence and a temperature maintained at 25–28° degrees Celsius.FINDINGS: Under different lighting conditions, the blue light condition exhibited a higher biomass concentration of 3.99 gram per liter, with an estimated heat energy value of 1.278 kilojoule per liter. …”
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1435
Leveraging machine learning for enhanced reservoir permeability estimation in geothermal hotspots: a case study of the Williston Basin
Published 2025-01-01“…To enhance accuracy, we initially applied various clustering algorithms, including the density-based spatial clustering of applications with noise (DBSCAN), K-means, K-median, and hierarchical clustering methods, to delineate hydraulic flow units (HFU) within the reservoir using porosity, permeability and water saturation core data. …”
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1436
Study on the Stability and Control of Gob-Side Entry Retaining in Paste Backfill Working Face
Published 2025-01-01“…This system integrates a basic bolt-mesh-cable support structure with localized reinforcement using portal hydraulic supports. Field industrial practices demonstrated that after applying this comprehensive control technology, the convergence of roof and floor was approximately 190 mm and the convergence of two ribs was about 140 mm, effectively ensuring the stability of surrounding rock in GER with paste backfill working face.…”
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1437
Experimental and modeled analysis of contaminant mobility in coal fly ash landfills under continuous rainfall regimes
Published 2025-01-01“…The greatest release of the ions occurred at a Ma’lan loess compaction coefficient of 0.943 and a hydraulic conductivity of 6.031 × 10− 7. Under extreme rainfall conditions, the contaminants and heavy metals in the fly ash leachate migrate to a maximum depth of 56 cm in the compacted soil layer, with Pb reaching a depth of 28 cm, nickel 23 cm, cadmium 9 cm and hexavalent chromium 5 cm to meet Class III groundwater quality standards. …”
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1438
Study on Seismic Dynamic Response of Deep-Buried Tunnel Based on Tectonic Stress
Published 2022-01-01“…Core specimens were obtained through on-site drilling, with the initial tectonic stress in the tunnel area measured by using the hydraulic fracturing method. Dynamic mechanical parameters of the rocks were acquired through in-situ testing. …”
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1439
Study on the crack propagation morphology and initiation law of coal rock under the action of underwater electric pulse
Published 2025-01-01“…Abstract Based on the symmetric initiation mechanism of double-wing cracks in coal rock mass induced by high-pressure electro-recoil water pressure, fracturing experiments have been performed on coal rock mass under different water pressures and discharge conditions using high-voltage electric pulse hydraulic fracturing devices. Combined with CT scans, the crack spatial distribution inside the post-break coal rock mass was analyzed and found that the edge of the water injection hole is prone to produce double-wing cracks along the drilling hole diameter. …”
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1440
Bioinspired activation strategies for Peano-HASEL artificial muscle.
Published 2025-01-01“…This study aims to investigate the effect of activation strategies on the displacement-time response, force-length relationship, and force-velocity relationship of a Peano-hydraulically amplified self-healing electrostatic (HASEL) artificial muscle.…”
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