Results 41 to 50 of about 295,619 (168)

Inertial Proximal Block Coordinate Method for a Class of Nonsmooth Sum-of-Ratios Optimization Problems

SIAM Journal on Optimization, 2023
In this paper, we consider a class of nonsmooth sum-of-ratios fractional optimization problems with block structure. This model class is ubiquitous and encompasses several important nonsmooth optimization problems in the literature. We first propose an inertial proximal block coordinate method for solving this class of problems by exploiting the ...
Radu Ioan Bot, Minh N. Dao, Guoyin Li 0001   +2 more
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Displays that facilitate performance of multifrequency ratios during motor-respiratory coordination

Acta Psychologica, 2010
A large number of ratios between movement and breathing are possible, but only a small number have been performed during exercise. The purpose of this study was twofold: (1) to investigate displays that might facilitate the performance of other ratios; and (2) to test predictions from the sine circle map and continued fractions in a model motor ...
Eric E, Hessler, Laura M, Gonzales, Polemnia G, Amazeen   +2 more
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Inter-Segmental Coordination During Soccer Instep Kicking: A Vector-Coding Comparison Between Experienced Athletes and Novices

Bioengineering
The purpose of this study was to characterize the inter-segmental coordination of hip, knee, and ankle movement of the kicking leg during instep kicking for experienced athletes and novices, using vector coding as a non-linear technique.
Liwen Zhang, Meizhen Zhang, Hui Liu
doaj   +1 more source

Impacts of aspect ratio on task accuracy in parallel coordinates

CoRR
Parallel coordinates plots (PCPs) are a widely used visualization method, particularly for exploratory analysis. Previous studies show that PCPs perform much more poorly for estimating positive correlation than for estimating negative correlation, but it is not clear if this is affected by the aspect ratio (AR) of the axes pairs.
Hugh Garner, Sara Johansson Fernstad
openaire   +2 more sources

Ethylene Carbonate-based Concentrated Electrolyte Composed of Asymmetric Amide Anion for Rechargeable Sodium-ion Batteries

Electrochemistry
The phase behavior, Na+ coordination structure, Na+ conduction and transport properties, and battery performance of liquid electrolytes comprising sodium (fluorosulfonyl) (trifluoromethylsulfonyl) amide (NaFTA) and ethylene carbonate (EC) are ...
Yoshiki YOKOYAMA, Reita FURUI, Shiro SEKI   +2 more
doaj   +1 more source

catena-Poly[[(1,10-phenanthroline-κ2N,N′)lead(II)]-μ-azido-κ2N1:N3-μ-nitrito-κ3O,O′:O′-[(1,10-phenanthroline-κ2N,N′)lead(II)]-di-μ-azido-κ4N1:N1]

Acta Crystallographica Section E, 2010
The title coordination polymer, [Pb2(N3)3(NO2)(C12H8N2)2]n, has as the repeat unit a centrosymmetric dinuclear molecule having azide and nitrite groups that bridge adjacent heterocycle-coordinated metal centers.
Gholamhossein Mohammadnezhad, Ali Reza Ghanbarpour, Mostafa M. Amini, Seik Weng Ng   +3 more
doaj   +1 more source

Error Propagation in Isometric Log-ratio Coordinates for Compositional Data: Theoretical and Practical Considerations [PDF]

Mathematical Geosciences, 2016
Compositional data, as they typically appear in geochemistry in terms of concentrations of chemical elements in soil samples, need to be expressed in log-ratio coordinates before applying the traditional statistical tools if the relative structure of the data is of primary interest.
Mert, Mehmet Can, Filzmoser, Peter, Hron, Karel   +2 more
openaire   +2 more sources

Synthesis, characterization, and antiproliferative activities of new transition metal complexes with 3-((4-fluoro-2-hydroxybenzylidene)amino)-2-thioxoimidazolidin-4-one [PDF]

Alfarama Journal of Basic & Applied Sciences
The utilization of the (fluorosalicylidene)-aminothiohydantoin (FSATH) ligand has been employed in the synthesis of several coordination compounds containing Mn(II), Co(II), Cu(II), and Zn(II) ions.
lamia Ismail, eman hassan, Ashraf El-Bindary, redda elshaarawy, rozan zakaria   +4 more
doaj   +1 more source

Study on the coupling coordination and barrier factors between agroecological security and rural green development in China

Scientific Reports
Agroecological security is an important part of ecological security. Exploring the coupled and coordinated relationship between agroecological security and rural green development is of great strategic importance for sustainable economic and social ...
Dandan Gao
doaj   +1 more source

Synthesis, Characterization, and Luminescent Properties of Polymer Complexes of Nd(III) with β-Dicarbonyl Ligands

Nanoscale Research Letters, 2017
The neodymium(III) complexes with 2-methyl-5-phenylpenten-1-3,5-dione and allyl-3-oxo-butanoate were synthesized. The polycomplexes on their basis and copolymers with styrene and N-vinylcarbazole in ratio 5:95 were obtained by free-radical polymerization.
Oleksandra Berezhnytska, Irina Savchenko, Nadiya Ivakha, Olena Trunova, Nataliya Rusakova, Sergiy Smola, Oleksandr Rogovtsov   +6 more
doaj   +1 more source