Results 21 to 30 of about 26,795 (292)

Development of Comic Mathematics Learning Media Based on Contextual Approaches

open access: yesJurnal Ilmiah Pendidikan Matematika, 2020
The development of teaching materials or instructional media that are tailored to the characteristics of students is considered important at this time. For this reason, this study aims to develop comic-shaped mathematics learning media based on a valid ...
Erdawati Nurdin   +2 more
doaj   +1 more source

Data-based polyhedron model for optimization of engineering structures involving uncertainties

open access: yesData-Centric Engineering, 2021
This paper studies the data-based polyhedron model and its application in uncertain linear optimization of engineering structures, especially in the absence of information either on probabilistic properties or about membership functions in the fussy sets-
Zhiping Qiu   +3 more
doaj   +1 more source

Bottom-Up Synthesis of MoS2 /CNTs Hollow Polyhedron with 1T/2H Hybrid Phase for Superior Potassium-Ion Storage.

open access: yesSmall, 2020
Enslaved to the large-size K-ions, the construction of suitable anode materials with superior and stable potassium-ion storage properties is a major challenge.
Kuan Wu   +5 more
semanticscholar   +2 more sources

Structure of the {U13} polyoxo cluster U13O8Clx(MeO)38–x (x = 2.3, MeO = methoxide)

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2021
The structure of a new type of polyoxo cluster complex that contains thirteen uranium atoms, {U13}, is reported. The complex crystallized from methanol containing tetravalent uranium (UIV) with a basic organic ligand, and was characterized as ...
Sebastian Fichter   +2 more
doaj   +1 more source

Matrix Multiplication Vector Code Generation Based on Polyhedron Model [PDF]

open access: yesJisuanji kexue, 2022
Matrix multiplication is the core of many scientific calculations,and vectorized programming is one of the main means to improve its performance.In view of the existing vectorization optimization problems that often require manual tuning and need to be ...
WANG Bo-yang, PANG Jian-min, XU Jin-long, ZHAO Jie, TAO Xiao-han, ZHU Yu
doaj   +1 more source

Estimating lower probability bound of power system's capability to fully accommodate variable wind generation

open access: yesThe Journal of Engineering, 2019
As the penetration of wind generation increases, the uncertainty it brings has imposed great challenges to power system operation. To cope with the challenges, tremendous research work has been conducted, among which two aspects are of most importance ...
Bin Liu   +5 more
doaj   +1 more source

Unlocking the door to highly active ORR catalysts for PEMFC applications: polyhedron-engineered Pt-based nanocrystals

open access: yes, 2018
Proton exchange membrane fuel cells (PEMFCs) are considered to be an important low-carbon energy conversion technology, which has shown impressive performance improvement in the past decades.
Yan-Jie Wang   +6 more
semanticscholar   +1 more source

Refinement of the approximation of celestial bodies' gravitational field using polyhedra

open access: yesВісник Астрономічної школи, 2013
The polyhedral method is an effective computational approach to the approximation of the gravitational potential and attraction of an irregularly shaped body.
A. A. Tereshchenko   +2 more
doaj   +1 more source

New algorithm for calculating cycle intersection indices

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. The objects of study are triangulated compact polyhedron P , which are n -dimensional manifolds with boundary. The goal is to create new efficient algorithms for calculating modulo 2 intersection indices. Materials and methods.
E.I. Yakovlev
doaj   +1 more source

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu   +3 more
wiley   +1 more source

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