Results 101 to 110 of about 886,896 (272)
Clique number and ball containment number of unit ball graphs
Electronic Notes in Discrete Mathematics, 2001 Abstract For each d ≥ 2, we give the construction of a sequence (νdn)n>o of sets of (d+l)n points of diameter 1 in Download : Download full-size image d, such that a unit ball cannot contain more than 1 (d + 1) ∣ν n ∣ + 1 points. In the case d=2, this answers a conjecture of McDiarmid.
openaire +1 more source
Sensorized Engineered Tissues with Built‐in Thermoregulation and Nutrient Supply
Advanced Functional Materials, EarlyView.This work introduces a granular hydrogel‐based tissue engineering platform that includes a closed‐loop temperature control to maintain 37°C and sustainably releases nutrients, thereby enabling cells to retain a high viability even if stored at room temperature for up to 24 h.
Antonia Georgopoulou +5 more
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Toeplitz Operators on Dirichlet-Type Space of Unit Ball
Abstract and Applied Analysis, 2014 We construct a function u in L2Bn, dV which is unbounded on any neighborhood of each boundary point of Bn such that Toeplitz operator Tu is a Schatten p-class ...
Jin Xia, Xiaofeng Wang, Guangfu Cao
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Advanced Functional Materials, EarlyView.With a charge‐ion coupling engineering strategy, a K+/vacancy disordered K0.5Mn0.8Co0.1Ti0.1O2 material has been designed. The targeted transition metal doping disrupts charge ordering and inducing K+/vacancy disordering, thereby enabling rapid K+ diffusion through interconnected channels and a stable solid‐solution reaction mechanism.
Yongfeng Jia +10 more
wiley +1 more source
Development and Application of Ball Screw Pumping Unit
Shiyou jixie, 2021 At present, 12,000 rod pumped wells are implementing intermittent pumping system in the Daqing Oilfield, however, due to insufficient downhole feed flow, the use of conventional walking-beam pumping unit seriously affects the economic, efficient, energy ...
Zheng Dongzhi
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Single‐ and Dual‐Atom Configurations in Atomically Dispersed Catalysts for Lithium–Sulfur Batteries
Advanced Functional Materials, EarlyView.Single‐atom and dual‐atom‐based atomically dispersed catalysts (ADCs) effectively address the shuttle effect and sluggish redox kinetics in Li–S batteries. With nearly 100% atomic utilization and tunable coordination environments, ADCs enhance LiPSs adsorption, lower conversion barriers, and accelerate sulfur redox reactions.
Haoyang Xu +4 more
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Advanced Functional Materials, EarlyView.The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu +10 more
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Ti6Al4V‐Bioglass‐Copper Composites for Load‐Bearing Implants
Advanced Healthcare Materials, EarlyView.We have designed and manufactured a novel Ti64‐based composite by adding 45S5 bioglass (BG) and copper (Cu). Adding BG on titanium improves wear resistance and biocompatibility, whereas Cu addition improves mechanical strength while providing inherent lifelong bacterial resistance.
Lochan Upadhayay +3 more
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Jixie chuandong, 2005 By studing on the practical performance of the ball mill transmission system,the fault tree of the ball mill transmission system is built up.The life distribution function of the transmission system is obtained through the digital simulation of the fault
陈立新, 林凤梅
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On the problem of retracting balls onto their boundary
Abstract and Applied Analysis, 2003 We provide some new estimates of the smallest possible Lipschitz constant for retractions of the unit ball B onto the unit sphere S in infinite-dimensional Banach spaces.
Kazimierz Goebel
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