Results 51 to 60 of about 77,572 (263)
工程科学与技术, 2018 With the continuous innovation of cross wedge rolling technology,its product range is also expanding.When the stepped shaft is formed to equal diameter shaft by the cross wedge rolling,the quality of the shaft end is directly affected by its length due ...
Xuedao SHU, Sutao HAN, Jie WEI
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A Concave Regularly Varying Leader for Equi-concave Functions
Journal of Mathematical Analysis and Applications, 1994 Two functions \(\phi\) and \(\psi\) are equivalent \((\phi\sim \psi)\) if there exists a constant \(c> 0\) such that for each \(t\geq 0\), \(c^{- 1}\psi(t)\leq \phi(t)\leq c\psi(t)\). A function \(\phi\) is said to be equiconcave if \(\phi(0)= 0\) and there is a concave function \(\psi\) such that \(\psi\sim \phi\).
Abakumov, E.V., Mekler, A.A.
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Meniscus‐Guided Interfacial Ring‐by‐Ring Assembly for In Situ Fabrication of Tubular Hydrogels
Advanced Materials, EarlyView.A tubular hydrogel fabrication method leveraging the meniscus effect at the oil‐water interface is presented. UV irradiation across the concave surface of the photocurable hydrogel precursor induces the formation of ring‐like hydrogel structures. Sequential ring‐by‐ring assembly within microchannels enables the construction of arteriole‐scale hydrogel ...
Yuki Kamiya +2 more
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Global Assessment of Lake Surface Morphology and Its Impact on Water Volume Estimation
Water Resources ResearchLake surface morphology, an essential yet underexplored feature of hydrological systems, remains poorly understood, including its effects on water volume estimation. This study investigates north‐south surface profiles of 147 lakes worldwide using ICESat‐
Jing Zhang +3 more
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Escaping the Scaling Relationships in Oxygen Reduction Catalysis: Implications for PEM Fuel Cells
Advanced Materials, EarlyView.Escaping the scaling relationships of the oxygen reduction reaction is vital for hydrogen fuel cells. This outlook examines how interfacial heterogeneity, spanning the subsurface lattice, chemisorption layer, and near‐interface solvation volume, mechanistically decouples intermediate binding energetics.
Muhammad Bilal Wazir +2 more
wiley +1 more source
Advanced Materials, EarlyView.This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao +3 more
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Advanced Materials, EarlyView.Mixed‐cation lead mixed‐halide perovskites suffer from structural instabilities linked to nanoscale heterogeneity. To probe this non‐destructively, a low‐dose, concurrent 4D‐STEM and EDX methodology has been developed. Examining a (FA0.83Cs0.17)Pb(I0.8Br0.2)3 film revealed a complex mosaic of coexisting crystal structures. Crucially, local deficiencies
Jinseok Ryu +6 more
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Improvement of upsetting process of four-beam workpieces based on computerized and physical modeling [PDF]
FME Transactions, 2020 The method of upsetting of large ingots has been investigated in this work. The proposed method consists in upsetting of profiled workpieces with concave faces. An angle of the concave faces was 150°. A relative depth of the concave faces has been varied
Markov Oleg E. +5 more
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Advanced Materials Technologies, EarlyView.Hierarchical multi‐material TPMS lattices are engineered as flexible tactile sensors by combining soft and stiff elastomeric layers with a conformal conductive coating. The bilayer architecture delivers sensitivity at low pressures while maintaining a broad detectable range under large loads, enabling reliable pressure and vibration monitoring for ...
Reza Noroozi +3 more
wiley +1 more source
INTENSIVE THRESHING MECHANISM IMPROVEMENT
Advanced Engineering Research, 2012 It is shown that the intensive threshing mechanism, containing the drum with smooth rasp bars an d the concave with a convex inlet and canting bars with flanges (_/ - shaped bars) without rods throughout the remaining exte nsion, may become more ...
Gennady A. Kuzin +2 more
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