Results 41 to 50 of about 1,509,300 (299)
Efficient Routing Mechanisms for Dragonfly Networks [PDF]
2013 42nd International Conference on Parallel Processing, 2013 High-radix hierarchical networks are cost-effective topologies for large scale computers. In such networks, routers are organized in super nodes, with local and global interconnections. These networks, known as Dragonflies, outperform traditional topologies such as multi-trees or tori, in cost and scalability. However, depending on the traffic pattern,
Marina García +4 more
openaire +2 more sources
Shock and VibrationTooth flank fracture (TFF) and tooth interior fatigue fracture (TIFF) usually occur on case-harden gears in electromechanical coupling systems, both starting from the core caused by metal fatigue. The cracks propagate rapidly compared with the total life
Lin Han +3 more
doaj +1 more source
Effect of bionic microtexture geometry on the tribological performance of hydrophobic surfaces
Journal of Materials Research and TechnologyThis study intergrates experimental and theoretical approaches to explore the effect of bionic microtexture geometry on the tribological performance of hydrophobic surfaces.
Junyan Wang +4 more
doaj +1 more source
Cross-coupled intelligent control for a novel two-axis differential micro-feed system
Advances in Mechanical Engineering, 2018 Nonlinear friction in a conventional drive feed system feeding at low speed is a main factor that contributes to feed drive complexity. A novel two-axis differential micro-feed system is developed in this study to overcome the accuracy limitation of ...
Fuxin Du +5 more
doaj +1 more source
Fractal space frames and metamaterials for high mechanical efficiency
, 2008 A solid slender beam of length $L$, made from a material of Young's modulus $Y$ and subject to a gentle compressive force $F$, requires a volume of material proportional to $L^{3}f^{1/2}$ [where $f\equiv F/(YL^{2})\ll 1$] in order to be stable against ...
Farr, R. S., Mao, Y.
core +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley +1 more source
Electrothermally Driven Reconfiguration of Microrobotic Beam Structures for the ChipSail System
Micromachines, 2023 Solar sailing enables efficient propellant-free attitude adjustment and orbital maneuvers of solar sail spacecraft with high area-to-mass ratios. However, the heavy supporting mass for large solar sails inevitably leads to low area-to-mass ratios ...
Kecai Xie +8 more
doaj +1 more source
Loose mechanochemical coupling of molecular motors
, 2011 In living cells, molecular motors convert chemical energy into mechanical work. Its thermodynamic energy efficiency, i.e. the ratio of output mechanical work to input chemical energy, is usually high.
Howard J. +4 more
core +1 more source
Greedy Algorithms Make Efficient Mechanisms [PDF]
Proceedings of the Sixteenth ACM Conference on Economics and Computation, 2015 We study mechanisms that use greedy allocation rules and pay-your-bid pricing to allocate resources subject to a matroid constraint. We show that all such mechanisms obtain a constant fraction of the optimal welfare at any equilibrium of bidder behavior, via a smoothness argument.
Brendan Lucier, Vasilis Syrgkanis
openaire +2 more sources
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source