Results 21 to 30 of about 293,429 (283)

On the Behavior of Honeycomb, Grid and Triangular PLA Structures under Symmetric and Asymmetric Bending

open access: yesMicromachines, 2022
Additive manufacturing technologies enable the production of components with lightweight cores, by means of infills with various patterns and densities. Together with reduced mass and material consumption, infill geometries must ensure that strength and ...
Vasile Cojocaru   +2 more
doaj   +1 more source

Research and Development of a Wireless Self-Powered Sensing Device Based on Bridge Vibration Energy Collection

open access: yesSensors, 2021
Traditional bridge monitoring has found it difficult to meet the current diversified needs, and frequent replacement of sensor batteries is neither economical nor environmentally friendly. This paper presents a wireless acceleration sensor with low power
Xinlong Tong   +5 more
doaj   +1 more source

A case of temporal triangular alopecia

open access: yesTurkderm Turkish Archives of Dermatology and Venereology, 2020
Temporal triangular alopecia (TTA) is a non-cicatricial alopecia characterized by an alopecic patch, usually located in the frontotemporal region, unilateral or bilateral, with an oval or narrow triangular base and no terminal hairs on it.
Emre Zekey, Gülcan Saylam Kurtipek
doaj   +1 more source

Analisis Kemampuan Pemahaman Konsep Matematis pada Materi Segitiga dan Segiempat Ditinjau Berdasarkan Karakteristik Cara Berpikir

open access: yesArithmetic, 2022
The research was done for analyze understand mathematical concepts of students on the material of triangular and quadrangular in terms of the characteristics of the student's way of thinking. This type of research is descriptive qualitative. The subjects
Bella Nurbaiti Purwandini   +2 more
doaj   +1 more source

On triangular similarity of nilpotent triangular matrices [PDF]

open access: yesLinear Algebra and its Applications, 2020
Let $B_n$ (resp. $U_n$, $N_n$) be the set of $n\times n$ nonsingular (resp. unit, nilpotent) upper triangular matrices. We use a novel approach to explore the $B_n$-similarity orbits in $N_n$. The Belitski\uı's canonical form of $A\in N_n$ under $B_n$-similarity is in $QU_n$ where $Q$ is the subpermutation such that $A\in B_n QB_n$.
Ming-Cheng Tsai   +2 more
openaire   +3 more sources

Uniform bounds on the 1-norm of the inverse of lower triangular Toeplitz matrices [PDF]

open access: yes, 2011
A uniform bound on the 1-norm is given for the inverse of a lower triangular Toeplitz matrix with non-negative monotonically decreasing entries whose limit is zero. The new bound is sharp under certain specified constraints.
Yuan, Y.X.   +3 more
core   +4 more sources

Common Fixed Point Theorems in M-Fuzzy Cone Metric Spaces

open access: yesResults in Nonlinear Analysis, 2021
This work aims to generalize the Banach contraction theorem to M-fuzzy cone metric spaces. We construct generalized M-fuzzy cone contractive conditions for three self mappings with which they have a unique common fixed point.
Jeyaraman Mathuraiveeran , Suganthi Mookiah
doaj   +1 more source

Common Fixed Point Theorems in Intuitionistic Generalized Fuzzy Cone Metric Spaces

open access: yesMathematics, 2020
In the present work, we study many fixed point results in intuitionistic generalized fuzzy cone metric space. Precisely, we prove new common fixed point theorems for three self mappings that do not require any commutativity or continuity but a ...
Mathuraiveeran Jeyaraman   +2 more
doaj   +1 more source

HESITANT Triangular Neutrosophic Numbers and Their Applications to MADM [PDF]

open access: yesNeutrosophic Sets and Systems, 2020
Hesitant neutrosophic sets can accomodate more uncertainty compare to hesitant fuzzy sets and hesitant intuitionistic sets. On the other hand, triangular neutrosophic numbers are often used by the decision makers to evaluate their opinion in multi ...
Abhijit Saha , Irfan Deli, Said Broumi
doaj   +1 more source

Optimal Surplus-Dependent Reinsurance under Regime-Switching in a Brownian Risk Model

open access: yesRisks, 2021
In this paper, we consider a company that wishes to determine the optimal reinsurance strategy minimising the total expected discounted amount of capital injections needed to prevent the ruin. The company’s surplus process is assumed to follow a Brownian
Julia Eisenberg   +2 more
doaj   +1 more source

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