Results 131 to 140 of about 5,144,321 (345)

Influence of water level dropping rates on the collapse of karst soil caves

Carsologica Sinica
The change of water-gas pressure caused by the rise and fall of water level will lead to the collapse of karst soil caves. In this study, we combined the physical model test and FLAC3D numerical simulation to simulate the soil cave collapse caused by ...
Xuejun CHEN, Mingming XUE, Yu SONG
doaj   +1 more source

Thickness‐Dependent Skyrmion Evolution in Fe3GeTe2 During Magnetization Reversal

Advanced Functional Materials, EarlyView.
Thickness‐ and field‐dependent magnetic domain behavior in 2D van der Waals Fe3GeTe2 is studied using Lorentz TEM and micromagnetic simulations. A patch‐like domain phase evolves from skyrmions during magnetization reversal, and step edges between thickness regions act as pinning sites.
Jennifer Garland, John Fullerton, PeiYu Cai, Rabindra Basnet, Santosh Karki Chhetri, Jin Hu, Elton J. G. Santos, Yue Li, Charudatta Phatak, Amanda Petford‐Long   +9 more
wiley   +1 more source

Unusual in-plane lattice collapse in layered La2O3Mn2Se2 initiated by pressure-driven spin-crossover

Communications Materials
The layered materials typically exhibit greater compressive behavior along the out-of-plane direction, and thus pressure typically leads to the collapse of the c-axis lattice constant and promotes the system becoming a more three-dimensional nature at ...
Yi-Kang Li, Ye Yang, Yuqing Zhang, Zhigang Gui, Xi-Kai Wen, Yan-Jun Li, Qingyuan Liu, Xian-Long Wang, Rui Wang, Jianjun Ying, Xianhui Chen   +10 more
doaj   +1 more source

Unusual Swelling Behavior of Hydrogels Modified with Spiropyran as Appendage or Crosslinker

Advanced Functional Materials, EarlyView.
Not so innocent after all—spiropyran crosslinkers in methylenebisacrylamide‐crosslinked poly(acrylamide‐co‐acrylic acid) hydrogels increase crosslinking density, but also, counterintuitively, increase swelling. Charge complexation, cooperative chemo‐mechanical effects, and aggregation may explain these observations.
Michael M. Lerch, Ankita Shastri, Thomas B. H. Schroeder, Amos Meeks, Shucong Li, Anna V. Shneidman, Michael Aizenberg, Joanna Aizenberg   +7 more
wiley   +1 more source

Analysis of the Collapse Law of Elliptical Brittle Mud Shale Boreholes

Shiyou jixie, 2020
Mechanical collision is easy to cause brittle mud shale to collapse from a wellbore during drilling operation, and make the shape of the wellbore deviate from an ideal circle, so studying the collapse law according to a circular wellbore will bring ...
Liu Hailong, Zhang Lei, Xie Tao, Zhang Qilong, Lin Jiayu   +4 more
doaj  

Solvent‐Free Bonding Mechanisms and Microstructure Engineering in Dry Electrode Technology for Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
Dry electrode technology revolutionizes battery manufacturing by eliminating toxic solvents and energy‐intensive drying. This work details two promising techniques: dry spray deposition and polymer fibrillation. How their unique solvent‐free bonding mechanisms create uniform microstructures for thicker, denser electrodes, boosting energy density and ...
Yuhao Liang, Hao Long, Zimo Huang, Ting He, Xueming Chen, Meng Li, Hao Chen, Shanqing Zhang   +7 more
wiley   +1 more source

Study of borehole stability of volcanic rock formation with the influence of multiple factors

Journal of Petroleum Exploration and Production Technology
Borehole instability in igneous rock formation has attracted more and more attention in recent ten years. In order to understand the mechanism of wellbore instability in igneous formation, a borehole stability model is established by applying the thermal,
Mingming Zhang, Jinglin Wen, Zhiming Xu, Zhiwei Xu, Jiang Feng, Xingdong Zhao   +5 more
doaj   +1 more source

Pressure-induced collapsed-tetragonal phase in SrCo2As2

, 2015
We present high-energy x-ray diffraction data under applied pressures up to p = 29 GPa, neutron diffraction measurements up to p = 1.1 GPa, and electrical resistance measurements up to p = 5.9 GPa, on SrCo2As2. Our x-ray diffraction data demonstrate that there is a first-order transition between the tetragonal (T) and collapsed-tetragonal (cT) phases ...
Jayasekara, W. T., Kaluarachchi, U. S., Ueland, Benjamin, Pandey, Abhishek, Lee, Y. B., Taufour, V., Sapkota, A., Kothapalli, K., Sangeetha, Nediadath, Fabbris, G., Veiga, L. S. I., Feng, Yejun, dos Santos, A. M., Bud’ko, Sergey, Harmon, B. N., Canfield, Paul, Johnston, David, Kreyssig, Andreas, Goldman, Alan   +18 more
openaire   +3 more sources

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source

Comparison of efficacy and safety of different suction pressure for speeding non-ventilated lung collapse in uniport video-assisted thoracoscopic surgery: a randomized-controlled trial

BMC Surgery
Background The bronchial suction has been applied in speeding lung collapse. Low suction pressure may not speed lung collapse, but high pressure causes occult lung injury.
Yulin Li, Haihui Huang, Lihua Hang
doaj   +1 more source