Results 1 to 10 of about 918,800 (258)

A Study on the Factors Influencing Coal Fracturing Range Caused by Liquid Carbon Dioxide Phase Transition

Geofluids, 2022
Liquid carbon dioxide phase transition fracturing technology (LCPTF) is an effective method to increase coal seam permeability, but there are many factors that affect the fracturing effect.
Xinyu Hu, Runxu Zhang, Bailin Zhang, Xinghua Zhang, Lulu Zhang, Yongdan Yang, Fazhi Yan   +6 more
doaj   +1 more source

Criterion for Hydraulic Fracture Propagation Behavior at the Interface of a Coal Measure Composite Reservoir

Geofluids, 2022
Regarding the three expansion modes of hydraulic fractures at the interface of a coal measure composite reservoir (arrested, deflection, and penetration), based on the coupling theory of fluid flow and solid elastic deformation, a criterion that ...
Yifeng Guo, Runxu Zhang, Xinghua Zhang, Kangkang Han, Fazhi Yan, Cunbao Deng, Zhixin Jin   +6 more
doaj   +1 more source

Risk of aortic aneurysm and aortic dissection with the use of fluoroquinolones in Korea: a nested case–control study

BMC Cardiovascular Disorders, 2022
Background Recent studies have raised concern about the association of fluoroquinolones with an increased risk of aortic aneurysm and aortic dissection. We aimed to evaluate such risk in a Korean population.
Nayeong Son, Eunmi Choi, Soo Youn Chung, Soon Young Han, Bonggi Kim   +4 more
doaj   +1 more source

Numerical Simulation Research on the Pressure Relief and Permeability Enhancement Mechanism of Large-Diameter Borehole in Coal Seam

Geofluids, 2022
In order to achieve high-efficiency extraction of coal seams with large-diameter borehole and large flow rates, and to rapidly reduce coal seam gas content and pressure, a large-diameter borehole coal seam pressure relief and permeability enhancement ...
Jun Nian, Bo Zhao, Wei Zhang
doaj   +1 more source

An Algorithm for Optimal Allocation of Water Resources in Receiving Areas Based on Adaptive Decreasing Inertia Weights

Journal of Advanced Transportation, 2022
As the biggest rigid constraint for high-quality economic and social development, how to improve the carrying capacity of water resources, realize the stable and coordinated development of water resources-ecological environment-economic and social ...
Fei Li, Guang Zhang, Shaohua Hu
doaj   +1 more source

Risk of genital and urinary tract infections associated with SGLT‐2 inhibitors as an add‐on therapy to metformin in patients with type 2 diabetes mellitus: A retrospective cohort study in Korea

Pharmacology Research & Perspectives, 2022
Sodium‐glucose cotransporter‐2 (SGLT‐2) inhibitors are antidiabetic drugs with associated safety concerns regarding the risk of genital and urinary tract infections.
Hyeri Yang, Eunmi Choi, Eunjun Park, Eonji Na, Soo Youn Chung, Bonggi Kim, Soon Young Han   +6 more
doaj   +1 more source

Experimental Study on Hydraulic Fracturing of Laminated Sandstone Combined with Industrial CT and L-NMR

Geofluids, 2022
Hydraulic fracturing in the immediate roof is a suitable method to increase the permeability of soft outburst coal seam. In this work, the propagation law of hydraulic fractures in laminated virgin sandstone and the change of microstructure after ...
Kai Wang, Xiang Zhang, Haijun Guo, Qiang Fu, Dengke Wang, Hang Zhang, Fangchao Lu   +6 more
doaj   +1 more source

Assessment and Management of Level Crossing Risks

Communications, 2011
The goal of the project "Assessment and Management of Level Crossing Risks" was to make a comprehensive analysis of safety of level crossings in the Moravian-Silesian Region.
Iva Zitnikova, Lenka Malerova, Rene Pribyl, Michal Schwarz, Ales Bernatik, Lenka Kopecka   +5 more
doaj   +1 more source

Seepage behavior assessment of earth-rock dams based on Bayesian network

International Journal of Distributed Sensor Networks, 2021
Seepage behavior assessment is an important part of the safety operation assessment of earth-rock dams, because of insufficient intelligent analysis of monitoring information, abnormal phenomena or measured values are often ignored or improperly ...
Lu He, Shijun Wang, Yanchang Gu, Qiong Pang, Yunxing Wu, Jiefa Ding, Jihao Yan   +6 more
doaj   +1 more source

Failure and Acoustic Emissions of Coal–Rock Combinations with Different Dip Angles in the Shaqu No. 1 Coal Mine

Advances in Civil Engineering, 2023
The force and deformation characteristics of the rock layer on the top and bottom of the coal seam change significantly when the dip angle changes. The mechanical properties and damage characteristics of differently inclined coal–rock assemblages were ...
Yuping Fu, Yongliang He, Chuantian Li
doaj   +1 more source