Results 31 to 40 of about 333,555 (269)

Fractal Dimension of Digital 3D Rock Models with Different Pore Structures

Energies, 2022
The macroscopic physical properties of rocks are profoundly determined by their microstructure, and the research of accurately characterizing rock pore structure has been extensively carried out in the fields of petroleum engineering and geoscience ...
Xiaobin Li, Wei Wei, Lei Wang, Jianchao Cai   +3 more
doaj   +1 more source

Quantitative two/three-dimensional spatial characterization and fluid transport prediction of macro/micropores in Gaomiaozi bentonite

Journal of Rock Mechanics and Geotechnical Engineering, 2022
The sealing performance of a bentonite barrier is highly dependent on its seepage characteristics, which are directly related to the characteristics of its pore structure.
Jiangfeng Liu, Shijia Ma, Hongyang Ni, Hai Pu, Xiaozhao Li, Shaojie Chen   +5 more
doaj   +1 more source

Hierarchically engineered nanochannel systems with pore-in/on-pore structures

NPG Asia Materials, 2023
AbstractBiological ion channels featuring asymmetries in structure, composition, and charge distribution have superior controllable ion transport properties, such as ion selectivity, ion gating, and ion rectification, by which life executes diverse activities, including signal transduction, cell motility, and mass and energy transfer. Inspired by this,
Minmin Li, Yuchen Cao, Yuting Xiong, Guangyan Qing   +3 more
openaire   +2 more sources

Pore structure characterization based on joint numerical and experimental study: a case study of Nanpu Sag

Journal of Petroleum Exploration and Production Technology, 2019
Petrophysical properties such as acoustic velocity, resistivity and nuclear magnetic resonance are greatly depending on the pore structures. This is because the pore structures could control the elastic modulus, conductive path and seepage distribution ...
Hatitao Li, Shaogui Deng, Xiyong Yuan, Xufei Hu, Yunfeng Niu   +4 more
doaj   +1 more source

Fractal characterization of pore structure of coal with different ranks and its effect on methane adsorption characteristics

Meikuang Anquan, 2023
The development of pore structure in coal reservoirs determines the adsorption performance of coal gas. The pore structure of three coal samples with different degrees of metamorphism, namely long-flame coal, coking coal and anthracite, was tested by low-
REN Shaokui, QIN Yujin, JIA Zongkai, SU Weiwei, LI Zhenrong
doaj   +1 more source

Pore Structure and Fractal Characteristics of Continental Low Maturity Organic-Rich Shale in the Sha-4 Member of the Liaohe Western Depression

Energies, 2022
The research on pore structure and heterogeneity of shale reservoirs has always been a hotspot in the study of unconventional reservoir characteristics. China is a country dominated by continental shale.
Yinglin Liu, Lei Zhang, Xuejuan Zhang, Xin He, Jinpeng Li, Yabing Xing, Fuxin Jin, Yiran Wang   +7 more
doaj   +1 more source

3D micropore structure evolution of ore particles based on image processing

工程科学学报, 2016
The micropore structure and evolution of copper oxide ore particles before and after acid leaching were investigated by high resolution X-ray micro-computed tomography(micro-CT) and three-dimensional(3D) image analysis. The pore structure parameters,such
YANG Bao-hua, WU Ai-xiang, MOU Xiu-xiu
doaj   +1 more source

Nuclear Pore Complex StructureUnplugged and Dynamic Pores [PDF]

Developmental Cell, 2004
Nuclear pore complexes (NPCs) are large protein assemblies embedded in the nuclear envelope that act as passageways for transport of molecules into and out of the nucleus. Two new studies, one in Nature Cell Biology and one in Science , offer direct evidence that the NPC is a highly dynamic structure.
openaire   +2 more sources

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Three‐dimensional characterization of open and closed coal nanopores based on a multi‐scale analysis including CO2 adsorption, mercury intrusion, low‐temperature nitrogen adsorption, and small‐angle X‐ray scattering

Energy Science & Engineering, 2020
Coal seams in China have poor permeability and a complex pore structure, leading to a low gas extraction efficiency. Studying the pore structure of different metamorphic degrees of coal by using modern technological methods and employing appropriate ...
Baisheng Nie, Jiayun Lun, Kedi Wang, Jiesheng Shen   +3 more
doaj   +1 more source