Instal·lacions climàtiques d'un poliesportiu

Aquest projecte té com a objectiu la realització de les instal·lacions de climatització (calefacció i refrigeració) i d’aigua calenta sanitària d’un gimnàs situat a la ciutat de Barcelona. Per realitzar les instal·lacions, el gimnàs es dividirà en sis zones i s’instal·laran sistemes d’aire-aigua i de tot aire per tal de garantir el confort dels clients i empleats. El sistema tot aire s’instal·larà a les zones esportives i als vestuaris i serà el de volum d’aire variable, també conegut com a VAV. Aquest sistema dosifica la quantitat d’aire a una temperatura fixa que arriba al local segons les necessitats del mateix. El sistema mixt es disposarà a la resta de zones i constarà de ventilació per aire i climatització per fancoils. L’aigua calenta sanitària s’escalfarà mitjançant energia solar tèrmica i un sistema de recolzament

A rate control algorithm for HEVC with hierarchical GOP structures

In this paper a buffer-constrained rate control (RC) algorithm for High Efficiency Video Coding (HEVC) with hierarchical group of pictures structures is proposed. Specifically, a quantization parameter (QP) cascading approach, which the QP value is increased from one temporal layer to the next, is employed to achieve high coding efficiency while maintaining the buffer fullness at secure levels. When compared to the current state-of-the-art RC algorithm, the experimental results show that our proposal achieves a slightly better rate-distortion performance and a remarkably better buffer control with an acceptable increase in computational complexity

Desarrollo de APP para Smartwatch: monitorización de personas vulnerables

En los últimos años, la monitorización de la ubicación de personas se ha vuelto cada vez más importante en nuestra sociedad. Desde que comenzó esta práctica en los centros penitenciarios, se ha ido ampliando a otros campos, en muchos de ellos debido a la reciente pandemia. Son muchos los dispositivos que se han fabricado con el fin de controlar estas situaciones, todos ellos con una gran robustez para evitar su manipulación surgiendo así un gran problema. El estigma que produce a las personas portar este tipo de dispositivos. Este proyecto, debido al auge que están teniendo en la actualidad los relojes inteligentes y la normalidad de su uso en esta sociedad, propone el desarrollo de una aplicación para este tipo de dispositivos que solucione este problema. Esta aplicación permite monitorizar la ubicación de la persona que porta el reloj, así como detectar su retirada del cuerpo y poder realizar un aviso al centro de control en el caso de que se produzca una situación de emergencia.In recent years, monitoring the location of people has become more important in our society. Since this practice began in prisions, it has been included in other fields, in many of them due to the recent pandemic. There are many devices that have been manufactured in order to control these situations, all of them with great robustness to avoid their manipulation, thus arising a great problem. The stigma that people carry this type of devices produces. This project, due to the boom that smartwatches are currently having and the normality of their use in this society, proposes the development of an application for this type of device that solves this problem. This application allows monitor the location of the person wearing the watch, as well as detect its removal from the body and be able to notify to the control center in the event of an emergency situation.Departamento de Informática (Arquitectura y Tecnología de Computadores, Ciencias de la Computación e Inteligencia Artificial, Lenguajes y Sistemas Informáticos)Departamento de Teoría de la Señal y Comunicaciones e Ingeniería TelemáticaGrado en Ingeniería Informátic

Induction heating appliance with a mobile double-coil inductor

An induction heating appliance designed to uniformly heat up metallic plates is studied in this paper. It consists of one planar inductor with two concentric coils attached to a mechanism, which allows moving the inductor under the plate while heating. This system is a possible solution for the growing concept of flexible induction cooking hobs, improving their performance in flexibility and in thermal distribution in the pans. With different combinations of motion and the selective activation of the inductor coils, any pan can be uniformly heated regardless its size or position on the hob. In this paper, we develop a thermal model to analyze the temperature distribution obtained in the pans for each diameter and strategy used. The model is solved using finite differences, and it is validated with experimental measurements. From the calculations, the best strategy for each pan diameter is obtained

Automatic classification of special days for short-term load forecasting

Electricity demand presents a repetitive pattern following daily, weekly and seasonal patterns. However, factors like temperature or social events tend to disrupt these patterns introducing outlying data that is difficult to forecast. This paper introduces a new methodology to classify special days without any prior knowledge of the database. Simple classification of special days into two or three categories is insufficient as the consumers’ behavior has many shades on these days. However, classifying special days in a wide range of categories required a deep understanding of the consumers’ behavior on different days and periods of the year. The methodology proposed describes an algorithm to automate this classification starting from a simple day-of-the-week classification and branching into as many categories as needed to fit a real database. Categories with similar profiles are merged to avoid overfitting and actual outliers are detected to ensure that no false categories are created. The methodology is developed using data from 2010 to 2017 and tested in three different systems. The benchmark used is the classification used by the Transmission System Operator in Spain and the test show that the proposed methodology provides more accurate results without the need of an expert to develop the classification

A Rate Control Algorthm for Low-Delay H.264 Video Coding with Stored-B Pictures

A rate control (RC) algorithm for H.264 video coding with stored-B (SB) pictures is proposed for low-delay applications. Different models for P and SB pictures are defined for a better QP and MAD estimation. Furthermore, a novel saw-tooth shaped model of target buffer level has also been introduced for a proper bit allocation in GOP structures with SB pictures. Our experimental results show that this proposal outperforms the reference software RC in terms of buffer occupancy and target bit rate adjustment at the expense of slight quality reduction.Publicad

Adaptive Multi-Pattern Fast Block-Matching Algorithm Based on Motion Classification Techniques

Motion estimation is the most time-consuming subsystem in a video codec. Thus, more efficient methods of motion estimation should be investigated. Real video sequences usually exhibit a wide-range of motion content as well as different degrees of detail, which become particularly difficult to manage by typical block-matching algorithms. Recent developments in the area of motion estimation have focused on the adaptation to video contents. Adaptive thresholds and multi-pattern search algorithms have shown to achieve good performance when they success to adjust to motion characteristics. This paper proposes an adaptive algorithm, called MCS, that makes use of an especially tailored classifier that detects some motion cues and chooses the search pattern that best fits to them. Specifically, a hierarchical structure of binary linear classifiers is proposed. Our experimental results show that MCS notably reduces the computational cost with respect to an state-of-the-art method while maintaining the qualityPublicad