Results 11 to 20 of about 14,414,092 (213)
Computation, 2022 The design of parts of machines, mechanisms, structures and foundations, particularly in the aerospace industry, is closely related to the definition of the stress state of the body.
Vitaly Miroshnikov +3 more
doaj +1 more source
Survey on attribute and concept reduction methods in formal concept analysis [PDF]
, 2023 Formal concept analysis (FCA) is now widely recognized as a useful approach for extracting, representing, and analyzing knowledge in various domains. The high computational cost of knowledge processing and the difficulty of visualizing the lattice are ...
Kovács, László +3 more
core +1 more source
Advances in Nonlinear Analysis, 2021 We are concerned with the following Schrödinger system with coupled quadratic ...
Yang Jing, Zhou Ting
doaj +1 more source
Progress and Challenges of Materials and Methods for Uranium Extraction From Seawater
He huaxue yu fangshe huaxue, 2023 The ocean covers 70% of the earth’s area, and the seawater uranium is more than 1000 times that of terrestrial uranium ore. In order to increase the power generation and ensure the sustainable operation of nuclear power plants, the development of ...
TANG Xing-rui +8 more
doaj +1 more source
Repdigits as Product of Fibonacci and Tribonacci Numbers
Mathematics, 2020 In this paper, we study the problem of the explicit intersection of two sequences. More specifically, we find all repdigits (i.e., numbers with only one repeated digit in its decimal expansion) which can be written as the product of a Fibonacci by a ...
Dušan Bednařík, Eva Trojovská
doaj +1 more source
Metals, 2020 Hot dipping Zn-Al-Mg coatings were prepared by rapid induction heating combined with gas protection. The influence of oxide scale on the structure and surface quality of a hot-dip Zn-6Al-3Mg alloy coating was studied in this paper.
Yijie Zhang +6 more
doaj +1 more source
Repdigits as Product of Terms of k-Bonacci Sequences
Mathematics, 2021 For any integer k≥2, the sequence of the k-generalized Fibonacci numbers (or k-bonacci numbers) is defined by the k initial values F−(k−2)(k)=⋯=F0(k)=0 and F1(k)=1 and such that each term afterwards is the sum of the k preceding ones.
Petr Coufal, Pavel Trojovský
doaj +1 more source
A Quadratic Diophantine Equation Involving Generalized Fibonacci Numbers
Mathematics, 2020 The sequence of the k-generalized Fibonacci numbers ( F n ( k ) ) n is defined by the recurrence F n ( k ) = ∑ j = 1 k F n − j ( k ) beginning with the k terms 0 , … , 0 , 1 .
Ana Paula Chaves, Pavel Trojovský
doaj +1 more source
On Multi-Step Look-Ahead Deadlock Prediction for Automated Manufacturing Systems Based on Petri Nets
IEEE Access, 2020 Automated manufacturing systems (AMSs) are prone to be in deadlock states when resource allocation is unreasonable. Reasonably allocating system resources to achieve deadlock control is a primary task of the design of an AMS.
Rongfeng Lin +4 more
doaj +1 more source
Combined Method Of Sight Reduction [PDF]
TransNav, 2021 As ships and maritime transport have evolved, knowledge of navigation methods has also evolved, reaching today modern means that require less of the skills and time of navigators to determine the position of the ship on sees and oceans. However, the IMO
Alina Buslă
doaj +1 more source