Timing of transition from open-pit to underground mining: …
A new mixed integer programming based model for transition-point problem in mining. ... This section illustrates the comparison between the result generated by the proposed model, single mining method and traditional transition model. ... Although this paper has demonstrated the potential of the proposed IP model to handle the …
Exploring the potential of OMOP common data model for process mining …
Background and objective Recently, Electronic Health Records (EHR) are increasingly being converted to Common Data Models (CDMs), a database schema designed to provide standardized vocabularies to facilitate collaborative observational research. To date, however, rare attempts exist to leverage CDM data for healthcare …
A mixed integer linear programming model for short-term …
The goal of this paper is to develop and test an optimisation model for short-term open pit mine production scheduling. A multidestination mixed integer linear programming (MILP) model is proposed, which minimises the overall cost of mining operations including mining, processing, haulage, rehandling and rehabilitation costs.
Sustainability of artisanal mining of cobalt in DR Congo
The share of cobalt produced by artisanal mining is fluctuating and difficult to determine because of its informal and often illegal character 3. In 2015–2016, 12,000–18,000 tons, that is 15 ...
Surface complexation modeling of calcite zeta potential measurements in
Here we present zeta potential measurements of synthetic calcite in mixed brines containing four PDIs and then develop a generalized double layer SCM to model the experimental results. The novelty of this work is to quantify the individual contribution of Ca 2+, CO 3 2−, Mg 2+ and SO 4 2− on synthetic calcite surface charge.
Application of Mixed Potential Theory to Leaching of …
Qualitative application of mixed potential theory to the leaching of mineral phases explains the often observed rapid shift from one kinetic regime to another and provides basic information regarding sequential phase …
Production Schedule Optimisation in Underground Hard …
by a mixed integer programming (MIP) production scheduling model and a manually generated model on a nine stope example is presented. Results indicate that the potential benefits of the MIP production
(PDF) Coupled mixed-potential and thermal-hydraulics model …
Therefore, we coupled mixed-potential theory and thermal hydraulics to develop a fl exible model (applicable in 3-D) for simulating corrosion processes in 2-D and predicting the corrosion
Mixed Potential Theory
Corrosion inhibition. Jeremy Moloney, ... Thunyaluk Pojtanabuntoeng, in Flow Assurance, 2022. 9.7.2.2 Corrosion potential measurement. The mixed potential theory defines the corrosion potential as a potential at which the cathodic current equals the anodic current. The current at this potential is the corrosion current. Thus changes in cathodic or anodic …
A unified potential-based cohesive model of mixed-mode …
The PPR potential-based model for cohesive fracture is verified by simulating a mixed-mode fracture problem, the mixed-mode bending (MMB) test. The MMB test was developed by Reeder and Crews (1990) in order to investigate the fracture toughness variation with respect to the mode mixity. The test has been standardized by ASTM (2006).
Traffic Flow Prediction Based on Spatiotemporal Potential …
Traffic flow prediction is a fundamental problem in spatiotemporal data mining. Most of the existing studies focuses on designing statistical models to fit historical traffic data, which are purely data-driven approaches and fail to reveal the underlying mechanisms of urban traffic. To address this issue, we propose the spatiotemporal potential energy field …
Application of mixed potential theory in hydrometallurgy
The concept of mixed potentials has been applied to explain important aspects of corrosion for many years. In many hydrometallurgical systems, reactions occur by means of electrochemical mech- anisms. Application ofmixed potential theory to explain the kinetics ofoxidative and reductive leach- ing processes is a useful concept in …
A unified potential-based cohesive model of mixed-mode …
This paper is organized as follows. The unified potential-based model (PPR) for mixed-mode cohesive fracture is developed in Section 2. Section 3 discusses path dependence of the work-of-separation in the unified potential-based model for mixed-mode fracture. Section 4 verifies the proposed model. Finally, Section 5 concludes the …
A model for mixed potential in direct methanol fuel cell …
6. Discussion. The typical open-circuit voltage of a DMFC is between 0.8 and 0.6 V.With the theoretical OCV in the order of 1.2 V, the total voltage loss at zero current is thus between 400 and 600 mV.As discussed above, the mixed potential due to poor oxygen transport gives 150–200 mV at the cell current of about 10 mA cm −2; at zero …
A finite element model for mixed potential sensors
Abstract. Many studies are dealing with the behavior of mixed potential sensors. However, a quantitative description of the processes leading to the sensor signals has not yet been carried out. This paper describes a first approach to address the question to what extent a mixed potential sensor can be modelled in a finite element model.
Mixed Potential of Ore Pulp | SpringerLink
The mixed potential of ore pulp is the solution equilibrium potential measured when the REDOX reaction of sulfide ore minerals in the flotation pulp reaches dynamic equilibrium. The level of the mixed potential of ore pulp can characterize the REDOX atmosphere in the solution and affect the surface state of sulfide minerals, the …
Mapping open-pit mining area in complex mining and mixed …
Mapping open-pit mining area in complex mining and mixed land cover zone using Landsat imagery. Author links open overlay panel Yongkai Wang, Kai Qin, Zilong Zhang, Qin He, Jason Cohen. ... (Breiman, 2001) models. The number of samples selected in 2010 and 2020 is the same for each category: 600 for the bare land category and 1200 each …
Introduction to Mixed Models
Performing Mixed Model in R. There are two packages in R to perform mixed models:-lme4; nmle; Data Analysis. I will be using lme4 package in this post to perform mixed model. Let's start and ...
Mixed Potential of Ore Pulp | SpringerLink
First Online: 03 May 2023. 3 Accesses. Download reference work entry PDF. The mixed potential of ore pulp is the solution equilibrium potential measured when the REDOX …
A review of machine learning applications for
However, despite the existence and application of these planning and scheduling guidelines and mathematical optimisation models, the inability to consistently deliver on planned mineral output in a dynamic operating environment is still one of the biggest challenges faced by underground mining operations to date (MacLean, …
Mixed potential function modeling and stability analysis of …
On the basis of Section 3.1.1, a simplification based on the mixed potential function model is made as follows: 1) PV array under standard test conditions (temperature T = 25 °C, light conditions S = 1000 W/m 2), It can be equated to a controlled current source by considering only its output characteristics. 2) All DC-DC converters operate in ...
Simulation of Regional Economic Development Potential Forecast Model
This research paper conducts the research on the simulation of regional economic development potential forecast model based on remote sensing information mining. With the help of relevant advanced technology, the logistics system can improve its operational efficiency and enhance its logistics supply capacity. At the same time, to a certain extent, …
MIXED POTENTIAL THEORY
sities. However, the mixed potential theory requires a mixed electrode system. This is shown in Figure 5.1 for the classical pure zinc electrode immersed in hydrochloric …
Mini-Gemini: Mining the Potential of Multi-modality …
compared to advanced models like GPT-4 and Gemini. We try to narrow the gap by mining the potential of VLMs for better performance and any-to-any workflow from three aspects, i.e., high-resolution visual tokens, high-quality data, and VLM-guided generation. To enhance visual tokens, we propose to utilize an additional
Solid-state mixed potential gas sensors: theory, …
A typical representation of a mixed potential device is shown in Fig. 1. A solid-state cell of electrode 1/solid electrolyte/electrode 2 is constructed. Both electrodes are exposed to the analyte gas, usually a mixture containing oxygen and an oxidizable or reducible gas. Mixed potentials of different voltages develop on each electrode due to ...
Groundwater Potential Mapping Using Data Mining Models …
Recently, data mining analysis techniques have been developed, as large spatial datasets have accumulated in various fields. Such a data-driven analysis is necessary in areas of high uncertainty and complexity, such as estimating groundwater potential. Therefore, in this study, data mining of various spatial datasets, including …
Mixed potential model for passivity characters of …
An innovative mixed potential model (MPM) combining the PDM to describe the partial anodic reactions of the metal dissolution at the atomic level, and the …
Large signal stability analysis for DC microgrid under …
Based on Brayton–Moser's mixed potential theory, this paper analyses the large signal stability of a DC microgrid, which contains multiple droop-controlled converters and CPL. This paper is organised as follows. Section 2 establishes the system mathematical model. Section 3 establishes the mixed potential models and stability …
Theoretical framework for mixed-potential …
mining the mixed potential, overpotent ials, reaction current, and selection ofthecathodicandanodicreactions.Thisistheequationfortheconceptof mixed-potential-driven catalysis.
Causal Inference using Multivariate Generalized Linear …
mapping patient's current information to biomarker trajectories under potential actions such as the arXiv:2303.02201v1 [stat.ME] 3 Mar 2023. ... pretation of the fixed-effects coefficients estimated from a linear mixed model, i.e. as a "blip" of a structural nested model. Shardell and Ferrucci (2018) incorporated joint mixed-effects ...
