Results 31 to 40 of about 251,244 (265)

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Analysis of the Effect of Tilling and Crop Type on Soil Structure Using 3D Laser Profilometry

Agriculture, 2023
Background and aim: Soil structure is an important indicator of the quality of soil, but detecting the early signs of soil degradation from soil structure is difficult.
Bianca B. Barreto, Fernando P. Rivera, Blair M. McKenzie, Katharine Preedy, Yangminghao Liu, Lionel X. Dupuy, Elisângela Ribeiro, Roberto A. Braga   +7 more
doaj   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Study on the electrical conductivity, strength properties and failure modes of concrete incorporating carbon fibers and iron tailings

Journal of Materials Research and Technology
This study aims to explore the feasibility of preparing conductive concrete using carbon fibers and iron tailings and its application in snow and ice melting on roads, and to solve the problem of excessive stacking of iron tailings.
Ping Jiang, Xingchen Hu, Na Li, Wei Wang, De Zhang, Haihua Zhan, Ru Song, Song Yang   +7 more
doaj   +1 more source

Sistemas de manejo e qualidade estrutural de Latossolo Roxo Management systems and structural quality of a Dusky-Red Latosol (Oxisol)

Pesquisa Agropecuária Brasileira, 2000
Objetivou-se, com este estudo, avaliar a qualidade estrutural de um Latossolo Roxo, pelos seguintes atributos: distribuição do tamanho dos agregados, diâmetro médio geométrico dos agregados, resistência dos agregados ao impacto das gotas de chuva ...
MARX LEANDRO NAVES SILVA, NILTON CURI, PHILIPPE BLANCANEAUX   +2 more
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

A Review of the Low-Carbon Transformation Path of Buildings Driven by Renewable Energy: Challenges and Optimization of Energy-Efficient Utilization

Buildings
Under the backdrop of the “dual carbon” strategy, leveraging renewable energy to promote low-carbon renovations of existing buildings has become an important path for the construction industry to achieve sustainable development.
Ping Jiang, Kebo He, Na Li, Lifeng Xu, Haihua Zhan   +4 more
doaj   +1 more source

Influence of Crust Formation on Soil Porosity under Tillage Systems and Simulated Rainfall

Hydrology, 2017
Surface crusts, formed by raindrop impact, degrade the soil surface structure causing changes in porosity. An experiment was conducted with the objective of evaluating the influence of the formation of a crusting layer on the porosity (percentage of area,
Jaqueline Dalla Rosa, Miguel Cooper, Frédéric Darboux, João Carlos Medeiros, Carla Campanaro, Luiz Roberto Martins Pinto   +5 more
doaj   +1 more source

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source