Results 21 to 30 of about 43,206 (265)

Determination of rational steam consumption in steam-air mixture flotation of apatite-nepheline ores

Записки Горного института, 2022
Relevance of the study is determined by the decisions taken to increase the production volume of certain commercial products from mineral raw materials. The scale, impact and consequences of the projects on developing the resource-saving technologies for
Sergey I. Evdokimov, Tatiana E. Gerasimenko   +1 more
doaj   +1 more source

Desingularization of Ore operators

Journal of Symbolic Computation, 2016
We show that Ore operators can be desingularized by calculating a least common left multiple with a random operator of appropriate order. Our result generalizes a classical result about apparent singularities of linear differential equations, and it gives rise to a surprisingly simple desingularization algorithm.
Shaoshi Chen, Manuel Kauers, Michael F. Singer   +2 more
openaire   +2 more sources

Mineral resource base of Russia’s copper: current state and development prospects

Горные науки и технологии
This study addresses the need for a comprehensive understanding of current state of Russia’s cupper mineral resource base. Its objective is to assess Russia’s copper reserves (balance reserves and forecast resources), analyze the spatial distribution of ...
Grigory Yu. Boyarko, Anna M. Lapteva, Liudmila M. Bolsunovskaya   +2 more
doaj   +1 more source

Bacterial, Archaeal, and Eukaryotic Diversity across Distinct Microhabitats in an Acid Mine Drainage

Frontiers in Microbiology, 2017
Acid mine drainages are characterized by their low pH and the presence of dissolved toxic metallic species. Microorganisms survive in different microhabitats within the ecosystem, namely water, sediments, and biofilms.
Victoria Mesa, Victoria Mesa, Jose L. R. Gallego, Ricardo González-Gil, Béatrice Lauga, Jesús Sánchez, Celia Méndez-García, Ana I. Peláez   +7 more
doaj   +1 more source

Geological features and genesis of the Dyusembay Central (Sayakhat) ore deposit

Руды и металлы, 2022
The article considers the geological features and ore composition of the Dyusembay Central (Sayakhat) lead-zinc deposit in the Karsakpai metallogenic complex in the Central Kazakhstan.
Galym Zh. Nurzhanov, Vladimir V. Kuznetsov, Pavel A. Nicenko, Nelly G. Kudryavtseva, Tatiana P. Kuznetsova, Mergen M. Murzagulov   +5 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Machine Learning‐Supported Analysis for Predicting and Visualizing Nonlinear Relationships Between Material Properties in Electroplated Chromium Layers

Advanced Engineering Materials, EarlyView.
This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer, Christopher Mai, Luca Eisentraut, Andreas Bund, Ricardo Buettner   +4 more
wiley   +1 more source

Operative control of ore quality at the input of ore preparation operations of enrichment fabric

Journal of Information and Telecommunication, 2019
This article describes the solution of the problem of determining the ore belonging to a particular quarry in the multi-flow technological process of ore crushing at the ore enrichment fabric of a mining and processing plant.
Viktor Toporov, Valery Axelrod, Ualsher Tukeyev   +2 more
doaj   +1 more source

Design and Characterization of a Two‐Dimensional Soft Array Based on Cooperative Dielectric Elastomer Actuators

Advanced Functional Materials, EarlyView.
A fully polymeric two‐dimensional array of Dielectric Elastomers enables self‐sensing, cooperative actuation, and large‐stroke operation in a DE‐based autonomous conveyor. Based only on voltage and current measurements at actuator level, the system detects the presence of a ball and subsequently drives it toward a target position.
Saverio Addario, Alberto Priuli, Giovanni Soleti, Sebastian Gratz‐Kelly, Benjamin Zemlin, Stefan Seelecke, Gianluca Rizzello   +6 more
wiley   +1 more source

Multi-Scale X-Ray Computed Tomography Analysis to Aid Automated Mineralogy in Ore Geology Research

Frontiers in Earth Science, 2021
Ore characterization is crucial for efficient and profitable production of mineral products from an ore deposit. Analysis is typically performed at various scales (meter to microns) in a sequential fashion, where sample volume is reduced with increasing ...
Mathis Warlo, Glenn Bark, Christina Wanhainen, Alan R. Butcher, Fredrik Forsberg, Henrik Lycksam, Jukka Kuva   +6 more
doaj   +1 more source