José Guadix - Academia.edu (original) (raw)
Papers by José Guadix
Dirección y Organización
El objetivo de este estudio se centra en optimizar el coste del ciclo de vida de un edificio con ... more El objetivo de este estudio se centra en optimizar el coste del ciclo de vida de un edificio con el menor consumo de demanda energética, centrado en la demanda de calefacción. El estudio pretende mejorar la calidad ambiental y energética en los edificios. El objetivo es establecer una metodología de optimización de la envolvente o epidermis de un edificio y de los elementos activos que la conforman, para estudiar el consumo energético y el ahorro correspondiente, considerando el impacto medioambiental y el coste de este. La aplicación de una heurística tabú permite agilizar el tiempo de resolución del problema.
El artículo describe un nuevo controlador de grupo de ascensores autónomo para la reducción del c... more El artículo describe un nuevo controlador de grupo de ascensores autónomo para la reducción del consumo energético basado en lógica difusa. Éste se basa en un algoritmo propuesto que se detalla y que despacha las llamadas de acuerdo con tres valoraciones distintas de cada posible asignación: una valoración de la energía absoluta empleada, una valoración energética de la energía relativa empleada y una valoración de la proximidad de las llamadas de planta. Las simulaciones presentadas al final del mismo avalan el diseño propuesto.
Durante la elaboración del trabajo se va a tratar de analizar los problemas existentes asociados ... more Durante la elaboración del trabajo se va a tratar de analizar los problemas existentes asociados al modo de utilización de sus unidades de inventario. El problema a resolver es equivalente al de la distribución de capacidad con inventario nulo, principalmente por el carácter perece dero de las unidades de inventario. El sistema Yield Management se puede dividir en tres módulos relacionados. El primero de previsión de la demanda, donde se pueda prever los clientes futuros a corto plazo. Éstas se usan como dato para la aplicación de lo s modelos de capacidad, tratándose de distribuir esta cantidad prevista entre las distintas categorías bajo la capacidad diaria del establecimiento hotelero. Por último, se realiza el modo de venta de los servicios. Hay que definirle al encargado de ventas una metodología para determinar, ante la llegada de un posible cliente, si se acepta o se rechaza la petición. En este último módulo se encuadra el desarrollo del trabajo.
Lecture Notes in Management and Industrial Engineering, 2014
In occupational safety, when a neural network is trained, it is possible to predict the outcome g... more In occupational safety, when a neural network is trained, it is possible to predict the outcome given a combination of risk factors. Risk assessment is probably the most important issue in occupational safety. Risk assessment facilitates the design and prioritization of effective prevention measures. Neural network were applied for predicting the severity of accidents, which is an important to assess risks. Data sets were obtained from the official accident notifications in the manufacturing sector of Andalusia in 2011. The results confirm that neural networks are useful in risk factor estimation. Association analysis was used to identify the most important risk factors within the predicting variables. Diagnostic array analyses show that for preventive purposes it is better to use a reduced data set with a casecontrol approach in order to improve the specificity and the sensitivity.
International Journal of Production Research, 2010
In this paper, we present a real life assembly line balancing problem for a motorcycle manufactur... more In this paper, we present a real life assembly line balancing problem for a motorcycle manufacturing company. Results from the initial situation in the company are compared to those provided by a heuristic method and by a novel neighbourhood search method. An ARENA simulation model is developed to test the different proposals. The model was validated by comparing the simulation results from the initial company scenario with the real operation results. Consequently, the extension to the developed proposals allows us to select an adequate assembly line for the company, resulting in a greater productivity level and a more balanced line with respect to the operation times in the stations and the activity of the workers. The company has subsequently implemented our proposed schedule, obtaining remarkable improvements in its productivity.
International Journal of Production …, 2010
Optimizing and simulating the assembly line balancing problem in a motorcycle manufacturing compa... more Optimizing and simulating the assembly line balancing problem in a motorcycle manufacturing company: a case study ... Date Submitted by the Author: 10-Mar-2009 ... Complete List of Authors: Cortes, Pablo; University of Seville, Industrial Engineering Onieva, Luis; ...
Organization Engineering, more commonly referred to as Industrial Engineering in the English-spea... more Organization Engineering, more commonly referred to as Industrial Engineering in the English-speaking world, is a widespread discipline that covers fields from Economic Analysis to Production Management or Operational Research. Our objective with this paper is to describe the historical evolution of this discipline, star ting from the strive of the Industrial Revolution for efficiently planning and managing the new production means. We discuss the main cornerstones in this evolution, star ting with the works of F.W. Taylor, analyze the influence of World War II, which boosted the demand for increasingly complex models, algorithms and applications, and describe the current scenario for Organization Engineering and its main challenges for the future. The paper then turns to the Spanish context, where the academic development of the discipline is also analyzed, including mention of the different Engineering Schools where the corresponding fields were incorporated to their curriculum, a...
The sampling of the users comfort, allows observing and predicting the level of comfort on the HV... more The sampling of the users comfort, allows observing and predicting the level of comfort on the HVAC system. The development of online sampling systems assists in the recognition of the behaviour patterns that occur in the offices. This paper presents a methodology specially designed and developed in order to make easier knowledge extraction and representation, in this way it possible to make decisions about the comfort in buildings. The methodology used provides important and useful information to select the comfort set-point of the rooms of a central HVAC system without the need to use fixed values based on programmed time schedules or any other methodology. In this methodology, the users are evaluated by using a standard set of key questions in order to measure the level of satisfaction respect to environmental factors, thanks to a questionnaire of imprecise answers. We seek an improvement in the building users, regardless of their particularities. Keywords : comfort; HVAC; expert...
The estimation of pollutant emissions related to urban freight activities suffers from the same d... more The estimation of pollutant emissions related to urban freight activities suffers from the same difficulty faced when trying to estimate the characteristics of individual urban freight routes or demand parameters. The great variety of urban freight practices forces to attain this objective only through strong hypotheses and simplifications. We propose here a methodology based on the generic characterization of urban freight routes, identifying the main features of each route type and the type of commercial activities typically served by each one of them. This results in an estimation of the overall urban freight route patterns in a city, which in turn can be used to derive aggregate emission values. The methodology is applied to the city of Seville, in the South of Spain, showing promising results.
The collective concern for global warming is changing the way we behave and we act in our daily l... more The collective concern for global warming is changing the way we behave and we act in our daily life in order to reduce energy consumption and our CO2 footprint. However, since healthier and more comfortable environments are needed, the best solution is a well-balanced relationship between these two issues. The present article exposes a methodology for a multiobjective analysis which takes into account the consumption and energy efficiency as well as the thermal comfort, based on a field study in non-residential buildings and the application of fuzzy logic. As a result, an improvement related to energy saving and lower costs for buildings’ owners without detrimental to occupants’ thermal comfort and productivity is expected.
Dirección y Organización
La asignación de tareas en sistemas de transporte ha sido tradicionalmente hecho una vez al día. ... more La asignación de tareas en sistemas de transporte ha sido tradicionalmente hecho una vez al día. Al comienzo de la jornada, el decisor establece que tareas deben ser llevadas a cabo por cada vehículo. Entonces, atascos, averías y cualquier problema inesperado causaría grandes retrasos e inconvenientes sobre lo planificado. En este trabajo se propone el uso de información en tiempo real relativa a la posición de los vehículos para solventar el problema. De este modo, el decisor está permanentemente reconsiderando mejoras en la asignación si las condiciones lo aconsejan. Un mecanismo heurístico ha sido elegido para solventar el problema dada la necesidad de una gran velocidad computacional.
Dirección y Organización
El transporte vertical es una disciplina que estudia los movimientos de personas en edificios. Lo... more El transporte vertical es una disciplina que estudia los movimientos de personas en edificios. Los edificios altos se han convertido en una construcción común hoy en día. En dichos edificios, el transporte vertical es un problema que requiere un enfoque sistemático y ordenado. Así, para casos extremos en determinados edificios singulares, la ordenación del transporte vertical se convierte en un problema muy difícil de manejar, especialmente cuando diferentes personas llegan casi al mismo tiempo a plantas específicas deseando viajar hasta otras plantas de destino. Para resolver tales situaciones, la instalación de sistemas de control de grupos de ascensores (conocidos en inglés como Elevator Group Control Systems, EGCS) es una práctica habitual. Los EGCS se utilizan para gestionar ascensores coordinados múltiples en un edificio con el objeto de transportar pasajeros de manera eficiente. Los EGCS deben satisfacer las demandas asignando un ascensor a cada llamada de planta, realizando ...
International Journal of Bio-Inspired Computation
This paper deals with the optimisation of the operating costs in a distributed electric and heati... more This paper deals with the optimisation of the operating costs in a distributed electric and heating energy generation network. The network considers different options to supply the electric and heating demand of a large consumer building: the electricity can be directly bought from the grid, can be taken from renewable energy sources or can be produced from gas using a combined heat and power system. In the same line, the heating can be taken from a thermal solar renewable system, from the boiler or from the combined heat and power system. In addition, the large consumer has batteries to store electricity excesses and thermal storage systems to store the heating excess. The multicommodity flow mathematical formulation of the problem couples both electric and thermal models by considering cogeneration systems. The model is solved by a particle swarm optimisation (PSO) algorithm that is compared to the optimal solutions provided by Gurobi optimisation commercial software and a Monte Carlo algorithm. The PSO algorithm proved a very efficient performance in the available short time to provide the energy commands to the systems outperforming the alternative approaches.
Transactions of the Institute of Measurement and Control
This paper presents a guided and deep introduction to viral systems (VS), a novel bio-inspired me... more This paper presents a guided and deep introduction to viral systems (VS), a novel bio-inspired methodology based on a natural biological process taking part when the organism has to give a response to an external infection. VS has proven to be very efficient when dealing with problems of high complexity. The paper discusses on the foundations of VS, presents the main pseudocodes that need to be implemented and illustrates the methodology application. A comparison between VS and other metaheuristics, as well between different VS approaches is presented. Finally, trends and new research opportunities are presented for this bio-inspired methodology.
OR Insight, 2005
In this paper we describe a successful experience in the application of genetic algorithms. The A... more In this paper we describe a successful experience in the application of genetic algorithms. The Andalusian Regional Government was interested in defining strategies and taking measures promoting the development of the Information Society in the less favoured areas of the region. We collaborated developing a tool capable of evaluating the investment ratios that would be required to set up an optic fibre telecommunication network. Our proposal was a Decision Support System based on a genetic algorithm solutions' generator.
Journal of Business Research, 2016
Science and technology parks are of great importance in the business context of the region in whi... more Science and technology parks are of great importance in the business context of the region in which they carry out their activity. They are the main mechanisms of public and private initiatives for the promotion of research, development and innovation, and technology transfer. The main goal of this type of institutions is not a purely economic benefit, but also social and cultural, which makes them an appropriate investment from the public institutions' viewpoint. They promote the creation of companies and agreements with universities and research centers, generate employment, and attract technology-based companies. Therefore, they require in-detail assessment to understand their operation to generate action plans and models that new parks or those who are still in their initial growth phase may follow. This study establishes a series of models-or operation strategies-to identify the strategies of successful parks; that is, parks that have overcome the initial stage and handle high revenue volumes, high rates of land occupation, and a large number of employees.
Dirección y Organización
El objetivo de este estudio se centra en optimizar el coste del ciclo de vida de un edificio con ... more El objetivo de este estudio se centra en optimizar el coste del ciclo de vida de un edificio con el menor consumo de demanda energética, centrado en la demanda de calefacción. El estudio pretende mejorar la calidad ambiental y energética en los edificios. El objetivo es establecer una metodología de optimización de la envolvente o epidermis de un edificio y de los elementos activos que la conforman, para estudiar el consumo energético y el ahorro correspondiente, considerando el impacto medioambiental y el coste de este. La aplicación de una heurística tabú permite agilizar el tiempo de resolución del problema.
El artículo describe un nuevo controlador de grupo de ascensores autónomo para la reducción del c... more El artículo describe un nuevo controlador de grupo de ascensores autónomo para la reducción del consumo energético basado en lógica difusa. Éste se basa en un algoritmo propuesto que se detalla y que despacha las llamadas de acuerdo con tres valoraciones distintas de cada posible asignación: una valoración de la energía absoluta empleada, una valoración energética de la energía relativa empleada y una valoración de la proximidad de las llamadas de planta. Las simulaciones presentadas al final del mismo avalan el diseño propuesto.
Durante la elaboración del trabajo se va a tratar de analizar los problemas existentes asociados ... more Durante la elaboración del trabajo se va a tratar de analizar los problemas existentes asociados al modo de utilización de sus unidades de inventario. El problema a resolver es equivalente al de la distribución de capacidad con inventario nulo, principalmente por el carácter perece dero de las unidades de inventario. El sistema Yield Management se puede dividir en tres módulos relacionados. El primero de previsión de la demanda, donde se pueda prever los clientes futuros a corto plazo. Éstas se usan como dato para la aplicación de lo s modelos de capacidad, tratándose de distribuir esta cantidad prevista entre las distintas categorías bajo la capacidad diaria del establecimiento hotelero. Por último, se realiza el modo de venta de los servicios. Hay que definirle al encargado de ventas una metodología para determinar, ante la llegada de un posible cliente, si se acepta o se rechaza la petición. En este último módulo se encuadra el desarrollo del trabajo.
Lecture Notes in Management and Industrial Engineering, 2014
In occupational safety, when a neural network is trained, it is possible to predict the outcome g... more In occupational safety, when a neural network is trained, it is possible to predict the outcome given a combination of risk factors. Risk assessment is probably the most important issue in occupational safety. Risk assessment facilitates the design and prioritization of effective prevention measures. Neural network were applied for predicting the severity of accidents, which is an important to assess risks. Data sets were obtained from the official accident notifications in the manufacturing sector of Andalusia in 2011. The results confirm that neural networks are useful in risk factor estimation. Association analysis was used to identify the most important risk factors within the predicting variables. Diagnostic array analyses show that for preventive purposes it is better to use a reduced data set with a casecontrol approach in order to improve the specificity and the sensitivity.
International Journal of Production Research, 2010
In this paper, we present a real life assembly line balancing problem for a motorcycle manufactur... more In this paper, we present a real life assembly line balancing problem for a motorcycle manufacturing company. Results from the initial situation in the company are compared to those provided by a heuristic method and by a novel neighbourhood search method. An ARENA simulation model is developed to test the different proposals. The model was validated by comparing the simulation results from the initial company scenario with the real operation results. Consequently, the extension to the developed proposals allows us to select an adequate assembly line for the company, resulting in a greater productivity level and a more balanced line with respect to the operation times in the stations and the activity of the workers. The company has subsequently implemented our proposed schedule, obtaining remarkable improvements in its productivity.
International Journal of Production …, 2010
Optimizing and simulating the assembly line balancing problem in a motorcycle manufacturing compa... more Optimizing and simulating the assembly line balancing problem in a motorcycle manufacturing company: a case study ... Date Submitted by the Author: 10-Mar-2009 ... Complete List of Authors: Cortes, Pablo; University of Seville, Industrial Engineering Onieva, Luis; ...
Organization Engineering, more commonly referred to as Industrial Engineering in the English-spea... more Organization Engineering, more commonly referred to as Industrial Engineering in the English-speaking world, is a widespread discipline that covers fields from Economic Analysis to Production Management or Operational Research. Our objective with this paper is to describe the historical evolution of this discipline, star ting from the strive of the Industrial Revolution for efficiently planning and managing the new production means. We discuss the main cornerstones in this evolution, star ting with the works of F.W. Taylor, analyze the influence of World War II, which boosted the demand for increasingly complex models, algorithms and applications, and describe the current scenario for Organization Engineering and its main challenges for the future. The paper then turns to the Spanish context, where the academic development of the discipline is also analyzed, including mention of the different Engineering Schools where the corresponding fields were incorporated to their curriculum, a...
The sampling of the users comfort, allows observing and predicting the level of comfort on the HV... more The sampling of the users comfort, allows observing and predicting the level of comfort on the HVAC system. The development of online sampling systems assists in the recognition of the behaviour patterns that occur in the offices. This paper presents a methodology specially designed and developed in order to make easier knowledge extraction and representation, in this way it possible to make decisions about the comfort in buildings. The methodology used provides important and useful information to select the comfort set-point of the rooms of a central HVAC system without the need to use fixed values based on programmed time schedules or any other methodology. In this methodology, the users are evaluated by using a standard set of key questions in order to measure the level of satisfaction respect to environmental factors, thanks to a questionnaire of imprecise answers. We seek an improvement in the building users, regardless of their particularities. Keywords : comfort; HVAC; expert...
The estimation of pollutant emissions related to urban freight activities suffers from the same d... more The estimation of pollutant emissions related to urban freight activities suffers from the same difficulty faced when trying to estimate the characteristics of individual urban freight routes or demand parameters. The great variety of urban freight practices forces to attain this objective only through strong hypotheses and simplifications. We propose here a methodology based on the generic characterization of urban freight routes, identifying the main features of each route type and the type of commercial activities typically served by each one of them. This results in an estimation of the overall urban freight route patterns in a city, which in turn can be used to derive aggregate emission values. The methodology is applied to the city of Seville, in the South of Spain, showing promising results.
The collective concern for global warming is changing the way we behave and we act in our daily l... more The collective concern for global warming is changing the way we behave and we act in our daily life in order to reduce energy consumption and our CO2 footprint. However, since healthier and more comfortable environments are needed, the best solution is a well-balanced relationship between these two issues. The present article exposes a methodology for a multiobjective analysis which takes into account the consumption and energy efficiency as well as the thermal comfort, based on a field study in non-residential buildings and the application of fuzzy logic. As a result, an improvement related to energy saving and lower costs for buildings’ owners without detrimental to occupants’ thermal comfort and productivity is expected.
Dirección y Organización
La asignación de tareas en sistemas de transporte ha sido tradicionalmente hecho una vez al día. ... more La asignación de tareas en sistemas de transporte ha sido tradicionalmente hecho una vez al día. Al comienzo de la jornada, el decisor establece que tareas deben ser llevadas a cabo por cada vehículo. Entonces, atascos, averías y cualquier problema inesperado causaría grandes retrasos e inconvenientes sobre lo planificado. En este trabajo se propone el uso de información en tiempo real relativa a la posición de los vehículos para solventar el problema. De este modo, el decisor está permanentemente reconsiderando mejoras en la asignación si las condiciones lo aconsejan. Un mecanismo heurístico ha sido elegido para solventar el problema dada la necesidad de una gran velocidad computacional.
Dirección y Organización
El transporte vertical es una disciplina que estudia los movimientos de personas en edificios. Lo... more El transporte vertical es una disciplina que estudia los movimientos de personas en edificios. Los edificios altos se han convertido en una construcción común hoy en día. En dichos edificios, el transporte vertical es un problema que requiere un enfoque sistemático y ordenado. Así, para casos extremos en determinados edificios singulares, la ordenación del transporte vertical se convierte en un problema muy difícil de manejar, especialmente cuando diferentes personas llegan casi al mismo tiempo a plantas específicas deseando viajar hasta otras plantas de destino. Para resolver tales situaciones, la instalación de sistemas de control de grupos de ascensores (conocidos en inglés como Elevator Group Control Systems, EGCS) es una práctica habitual. Los EGCS se utilizan para gestionar ascensores coordinados múltiples en un edificio con el objeto de transportar pasajeros de manera eficiente. Los EGCS deben satisfacer las demandas asignando un ascensor a cada llamada de planta, realizando ...
International Journal of Bio-Inspired Computation
This paper deals with the optimisation of the operating costs in a distributed electric and heati... more This paper deals with the optimisation of the operating costs in a distributed electric and heating energy generation network. The network considers different options to supply the electric and heating demand of a large consumer building: the electricity can be directly bought from the grid, can be taken from renewable energy sources or can be produced from gas using a combined heat and power system. In the same line, the heating can be taken from a thermal solar renewable system, from the boiler or from the combined heat and power system. In addition, the large consumer has batteries to store electricity excesses and thermal storage systems to store the heating excess. The multicommodity flow mathematical formulation of the problem couples both electric and thermal models by considering cogeneration systems. The model is solved by a particle swarm optimisation (PSO) algorithm that is compared to the optimal solutions provided by Gurobi optimisation commercial software and a Monte Carlo algorithm. The PSO algorithm proved a very efficient performance in the available short time to provide the energy commands to the systems outperforming the alternative approaches.
Transactions of the Institute of Measurement and Control
This paper presents a guided and deep introduction to viral systems (VS), a novel bio-inspired me... more This paper presents a guided and deep introduction to viral systems (VS), a novel bio-inspired methodology based on a natural biological process taking part when the organism has to give a response to an external infection. VS has proven to be very efficient when dealing with problems of high complexity. The paper discusses on the foundations of VS, presents the main pseudocodes that need to be implemented and illustrates the methodology application. A comparison between VS and other metaheuristics, as well between different VS approaches is presented. Finally, trends and new research opportunities are presented for this bio-inspired methodology.
OR Insight, 2005
In this paper we describe a successful experience in the application of genetic algorithms. The A... more In this paper we describe a successful experience in the application of genetic algorithms. The Andalusian Regional Government was interested in defining strategies and taking measures promoting the development of the Information Society in the less favoured areas of the region. We collaborated developing a tool capable of evaluating the investment ratios that would be required to set up an optic fibre telecommunication network. Our proposal was a Decision Support System based on a genetic algorithm solutions' generator.
Journal of Business Research, 2016
Science and technology parks are of great importance in the business context of the region in whi... more Science and technology parks are of great importance in the business context of the region in which they carry out their activity. They are the main mechanisms of public and private initiatives for the promotion of research, development and innovation, and technology transfer. The main goal of this type of institutions is not a purely economic benefit, but also social and cultural, which makes them an appropriate investment from the public institutions' viewpoint. They promote the creation of companies and agreements with universities and research centers, generate employment, and attract technology-based companies. Therefore, they require in-detail assessment to understand their operation to generate action plans and models that new parks or those who are still in their initial growth phase may follow. This study establishes a series of models-or operation strategies-to identify the strategies of successful parks; that is, parks that have overcome the initial stage and handle high revenue volumes, high rates of land occupation, and a large number of employees.