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1
artículo
In this research work, shell deformations generated by surface forces acting on the shell are described and simulated. The Naghdi and Koiter models are used to describe shell deformations. A weak formulation for the model is obtained, and some results on the existence of solutions are presented. The finite element method is then used to obtain the deformations. In addition, simulations of shell deformations are shown for the case of sectional curvature k = 0.
2
artículo
Publicado 2011
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We study a system formed by M dimers through half-filled two-site Hubbard model, with two electrons. Our approach use the third version of Nonextensive Statistical Mechanics as tool for calculating thermodynamic and magnetic parameters such as entropy, internal energy, magnetization and specific heat. In the computer simulations, we vary the q entropic index values between 1 and 2, such that, q = 1.0, 1.4, 1.7 and 2.0. These values are interesting to study small magnetic systems. We find the critical temperature regions in simulations with the simple Hubbard model, i.e. without the intersite interaction. For other side, adding this additional term, we notice an enlargement and shifting of the thermodynamic parameters comparing with the obtained from simple Hubbard model; even more, we found in some cases the absence of the critical temperature regions.
3
artículo
The simulation model is a useful assessment tool to analyze in depth evaluation of investment projects, improving investor decision making. Contributes to investigate new project ideas and help identify investment opportunities aimed at the reformulation of projects, adapting to the attitudes and investor requirements. An alternative choice is the mathematics expectation that is used in the calculation of probabilities that an event occurs. The fact that a good estimate of the elements involved in the calculation of profitability is not conducted, can lead to invalidate the analysis, and therefore, can lead to approve unprofitable projects and vice versa. When is known the probability of an event occurring certain number of years, usually applies a certain percentage during that period. For example, if the probability of an event occurring is 20 years, a rate of 5% per annum will apply.
4
artículo
The simulation model is a useful assessment tool to analyze in depth evaluation of investment projects, improving investor decision making. Contributes to investigate new project ideas and help identify investment opportunities aimed at the reformulation of projects, adapting to the attitudes and investor requirements. An alternative choice is the mathematics expectation that is used in the calculation of probabilities that an event occurs. The fact that a good estimate of the elements involved in the calculation of profitability is not conducted, can lead to invalidate the analysis, and therefore, can lead to approve unprofitable projects and vice versa. When is known the probability of an event occurring certain number of years, usually applies a certain percentage during that period. For example, if the probability of an event occurring is 20 years, a rate of 5% per annum will apply.
5
informe técnico
Publicado 2021
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Descripción: En un medio tan dinámico, competitivo y globalizado como el actual, que involucra la elaboración de bienes, prestación de servicios y/o la combinación de ambos, obliga a las empresas a emplear herramientas que les permitan predecir y controlar el comportamiento del sistema que están administrando y con esta base puede tomar las decisiones de corto, mediano y largo plazo que les den ventajas competitivas, necesitando para ello herramientas con un alto nivel de seguridad, siendo una de estas herramientas la Simulación de Sistemas Discretos que se complementa con los cursos de investigación de operaciones llevados anteriormente. Actualmente el desarrollo y utilización de esta herramienta se debe a dos factores: primero, al crecimiento y desarrollo explosivo de la tecnología computacional (a nivel software y hardware), que permite el manejo de grandes cantidades de nú...
6
informe técnico
Publicado 2023
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Descripción: En un medio tan dinámico, competitivo y globalizado como el actual, que involucra la elaboración de bienes, prestación de servicios y/o la combinación de ambos, obliga a las empresas a emplear herramientas que les permitan predecir y controlar el comportamiento del sistema que están administrando y con esta base puede tomar las decisiones de corto, mediano y largo plazo que les den ventajas competitivas, necesitando para ello herramientas con un alto nivel de seguridad, siendo una de estas herramientas la Simulación de Sistemas Discretos que se complementa con los cursos de investigación de operaciones llevados anteriormente. Actualmente el desarrollo y utilización de esta herramienta se debe a dos factores: primero, al crecimiento y desarrollo explosivo de la tecnología computacional (a nivel software y hardware), que permite el manejo de grandes cantidades de nú...
7
artículo
Currently there is a wide range of software to simulate robotic cell and interact with a process. This article details the procedure to simulate and program a robotic system of classification of items using the software Cosimir Educational. The project includes a window model, positions and programming. Programming is performed using the language Mitsubishi Robot Language (MRL), which is simple but with enough capacity to perform tasks with the robot. This language has commands for movement control, counters, timers, subroutines, loops and incorporates input and output signals.
8
artículo
Currently there is a wide range of software to simulate robotic cell and interact with a process. This article details the procedure to simulate and program a robotic system of classification of items using the software Cosimir Educational. The project includes a window model, positions and programming. Programming is performed using the language Mitsubishi Robot Language (MRL), which is simple but with enough capacity to perform tasks with the robot. This language has commands for movement control, counters, timers, subroutines, loops and incorporates input and output signals.
9
tesis de grado
Publicado 2019
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This research project modeled and simulated a ventilation system at a Mining Concession, obtaining real-time information regarding the fans used to ventilate the mine. The simulation was developed using the VENTSIM 5 software, which also helped define the number of fans and the operating parameters required, field information, mine dimensions, the mining method, production, geothermal gradient, gas emission, air stream, and air pressure. In addition, the results from software operation revealed the need to open chimneys and use fans. Furthermore, the results also suggest that a specialist dedicated to ventilation and fan maintenance must be hired to formalize mining operations as per the Occupational Safety and Health Mining Regulations from Executive Action No. 024-2016-EM as this Mining Concession is currently operating without license.
10
artículo
The purpose of this research work is to present the flow diagram, material balance, equation statement and development of mathematical models that will allow us to predict final results such as: grades, recoveries and concentration radius that a mineral will report when it is processed by industrial scale flotation with information obtained from a batch of tests at the laboratory level, a method that can be applied to a wide variety of minerals and can be evaluated technically and economically with a high level of confidence.
11
artículo
Studies of urban transport networks in many cities are not well focused, since they do not include tools for their planning and control, making decisions to solve the multiple problems regarding traffic congestion expensive and not adequate, generating discomfort in the users, and many times it aggravates the problems, since its impact is not evaluated. Currently exist a variety of simulators that are helpful for traffic simulation and online monitoring. An alternative to this are traffic simulators, which currently exist in variety, however, they are not easily accessible, a formal study and a relationship with the research center that provides it is required, their personalized reports are limited and they comply to another reality. In the present work, six frequent cases of urban transport networks in Lima are modeled, simulated and validated: intersection, oval, union, by-pass, clove...
12
artículo
Publicado 2012
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This paper presents an investigation of the extraction of essential oils by steam distillation. The process is analyzed and a model is developed for the extraction of essential oil of eucalyptus in pilot scale with a steam flow of 5.73 g / min. According to the model Dunckhorst-Houghton, which considers the effect of axial dispersion, and the use of optimization procedures to establish the model parameters, excellent agreement was obtained between the amount of oil extracted theoretical and experimental.
13
artículo
Publicado 2005
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Over the last years, using phenomena models in interpreting and designing of software in metallurgical processes has been increasing. In this present research, a series of experimental test with polymetallic minerals is shown, which have been submitted to Flotation, Filtration, Leaching and Sedimentation processes. Mathematic modelling of such processes is shown, as well as the processing and simulation of the experimental data through the respective models. It is intended to contrast them with data from metallurgical plants for their respective validations. All these results will be used for a better planning and control of industrial variables in a concentrating plant.
14
artículo
Publicado 2005
Enlace
Enlace
Over the last years, using phenomena models in interpreting and designing of software in metallurgical processes has been increasing. In this present research, a series of experimental test with polymetallic minerals is shown, which have been submitted to Flotation, Filtration, Leaching and Sedimentation processes. Mathematic modelling of such processes is shown, as well as the processing and simulation of the experimental data through the respective models. It is intended to contrast them with data from metallurgical plants for their respective validations. All these results will be used for a better planning and control of industrial variables in a concentrating plant.
15
artículo
Publicado 2019
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The objective of the research was to estimate mathematical models for lead migration (μg/l) from a cellulose matrix using a neutral pH food simulant, taking two independent variables: total migration (mg/dm2 ) and the contact area (dm2 ), using multiple linear regression. The evaluated samples were two cellulose containers destined to the contact with food, being the origin of the cellulose from Chile and Brazil. Total and specific migration tests were carried out with the methodologies of Resolution No. 12 of MERCOSUR (1995) and method 3111 B of APHA (2005) respectively, under conditions of prolonged contact and at a temperature of 50 °C. The results of this research show that only the model for Brazilian pulp (Y = -55,864 – 0,304X1 + 9,173X2) was statistically adequate to make forecasts, with its correlation coefficient (R2) of 0,899. From the descriptive statistical analysis, the ...
16
artículo
Las turberas tropicales son humedales en los que el material vegetal se acumula en condiciones de anegamiento y se convierte en una densa capa de suelo orgánico. La alteración de su hidrología autorregulada por factores externos como el drenaje artificial, el cambio de uso del suelo y el cambio climático puede convertir rápidamente estas inmensas reservas de carbono en fuertes fuentes de gases de efecto invernadero. La inclusión de la hidrología de las turberas tropicales en los modelos del sistema Earth global nos permite comprender el impacto de estas perturbaciones externas. Hemos desarrollado los primeros módulos de hidrología para turberas tropicales naturales y drenadas que se incorporan al marco de modelización del Sistema de Observación de la Tierra Goddard de la NASA. Nuestros resultados muestran fuertes diferencias regionales e indican que la precisión de nuestro mo...
17
artículo
Publicado 2019
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In this work three mathematical models of transmission lines are shown, the most used, to simulate electromagnetic transients in power systems. In addition, its main characteristics, advantages and disadvantages are mentioned. Likewise, the algorithms are shown in the form of flow charts for the simulations of the transients. Finally, the results of simulations of maneuvering surges in a single-phase transmission line using the MATLAB software are shown.
18
artículo
Publicado 2019
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In this work three mathematical models of transmission lines are shown, the most used, to simulate electromagnetic transients in power systems. In addition, its main characteristics, advantages and disadvantages are mentioned. Likewise, the algorithms are shown in the form of flow charts for the simulations of the transients. Finally, the results of simulations of maneuvering surges in a single-phase transmission line using the MATLAB software are shown.
19
artículo
Validation of simulated precipitation forecasts with the BRAMS model for the La Libertad-Peru region
Publicado 2021
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The objective of this work is to validate the precipitation forecasts simulated with the Brazilian Regional Atmospheric Modelling Systems (BRAMS) numerical model in its version 5.3, for the La Libertad Region in Peru; this region of Peru has 80% of its land located in the northern highlands of Peru. In mountainous areas, precipitation is strongly influenced by the height of the terrain, a poor representation of the topographic elevations and depressions of the terrain can lead to an erroneous representation of the resolvable phenomena explicit by the model. Taking into account this characteristic of the study area, in the first instance the BRAMS model was configured to adequately represent the rugged orography of the local área at a horizontal resolution of 10 km. Then, the model was run to simulate precipitation forecasts at time horizons of 24, 48, 72, 96 and 120 ...
20
artículo
Publicado 2022
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The control devices can be used to dissipate the energy of structures subjected to dynamic loads in order to reduce structural damage and prevent the failure of them. The semiactive control devices that have received great attention in recent years are magnetorheological (MR) fluid dampers due to their mechanical simplicity, high dynamic range, large temperature operating range and low power requirements. In the present research work, Matlab and Simulink are used as computational tools for the modeling and simulation of structural control systems with magnetorheological dampers (MRDs). To begin with, the modeling is carried out through simulink block diagrams of the governing differential equations of representative mathematical models of MRDs. Next, a series of simulations is performed in order to replicate experimental results and to be able to validate the modeling step. Finally, the ...
