Results 31 to 40 of about 5,076,655 (301)
International Journal of Aerospace Engineering, 2020 Erosive burning refers to the augmentation of propellant burning rate appears when the velocity of combustion gas flowing parallel to the propellant surface is relatively high.
Yanjie Ma +4 more
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Research on Skin-Friction Drag Reduction by Hydrogen Injection in Supersonic Boundary Layer
Xibei Gongye Daxue Xuebao, 2019 In order to investigate the applicability of the skin-friction reduction technique using hydrogen injecting into turbulent boundary layer, three-dimensional numerical simulation was carried out for a constant-cross-confined-space with rearward facing ...
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Internal structure of Skyrme black hole [PDF]
, 2001 We consider the internal structure of the Skyrme black hole under a static and spherically symmetric ansatz. $@u8(Be concentrate on solutions with the node number one and with the "winding" number zero, where there exist two solutions for each horizon ...
D.V. Gal’tsov +23 more
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Applied Statistics, 1971 In most computer languages, the data are regarded as being held in machine storage either as individual scalar quantities or as members of rectangular arrays. It would make these languages more useful if the user were allowed to specify the shapes of other structures in which he wished to consider the data as being held, such as triangular arrays ...
Gower, J. C., Hill, I. D.
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Growing networks of overlapping communities with internal structure [PDF]
, 2016 We introduce an intuitive model that describes both the emergence of community structure and the evolution of the internal structure of communities in growing social networks.
Allard, Antoine +3 more
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A Model for Igniter Mass Flow Rate History Evaluation for Solid Rocket Motors
International Journal of Aerospace Engineering, 2019 This paper describes a zero-dimensional model for evaluating the mass flow rate history of a solid rocket motor igniter. Based on the results of an igniter-firing experiment, in which the igniter is the only source of combustion gas and no propellant is ...
Yanjie Ma +4 more
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Agriculture, 2022 The focus of world governance on climate change has been on the industrial and transport sectors, yet the agricultural sector produces a lot of greenhouse gases, and this has always been ignored.
Shibin Wen, Yuxiang Hu, Hongman Liu
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Internal space structure generalization of the quintom cosmological scenario [PDF]
, 2008 We introduce the Lagrangian for a multi-scalar field configuration in a $N$-dimensional internal space endowed with a constant metric $Q_{ik}$ and generalize the quintom cosmological scenario. We find the energy momentum tensor of the model and show that
A. Einstein +12 more
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Generation of LDPM structure formed by Voronoi cells
Acta Polytechnica CTU Proceedings, 2023 A preliminary study of an approach to internal structure generation used in lattice discrete particle models (LDPMs) [1]. The presented method used for particle generation and placement is intended to help realistically capture the internal structure of
Jan Vozáb, Jan Vorel
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An Approach to Analysing Erosive Characteristics of Two-Channel Combustion Chambers
International Journal of Aerospace Engineering, 2019 To acquire the erosive characteristics of two-channel combustion chambers, a quasi-one-dimensional internal ballistics model is proposed. Combining the model with two different erosive burning models, the modified L-R expression, and the Mukunda-Paul ...
Yanjie Ma +4 more
doaj +1 more source