Miquel Àngel Piera Eroles

Bio: Miquel Àngel Piera Eroles is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

P.m.t.

Abstract: SE HA DESARROLLADO UN NUEVO ENTORNO DE MODELADO ORIENTADO A LA INDUSTRIA DE PROCESOS, EL CUAL GENERA EL MODELO DE SIMULACION DE UNA PLANTA, DESCRITA GRAFICAMENTE A PARTIR DE LA REUTILIZACION DE LOS MODELOS DEFINIDOS "A PRIORI" QUE DEFINEN MODULARMENTE LA DINAMICA DE LOS ELEMENTOS QUE INTEGRAN EL SISTEMA A MODELAR, EL TRABAJO APORTA UNA NUEVA METODOLOGIA PARA ANALIZAR Y MODELAR AUTOMATICAMENTE LAS DINAMICAS EXTERNAS QUE APARECEN COMO FRUTO DE LA INTERACCION ENTRE LOS SUBPROCESOS. LAS HERRAMIENTAS DE MODELADO IMPLEMENTADAS PERMITEN: A) LA "REPRESENTACION DEL CONOCIMIENTO" QUE EL EXPERTO TIENE SOBRE LA DINAMICA DEL SUBPROCESO FISICO A DIFERENTES NIVELES DE ABSTRACCION. B) PROCESAR DICHA INFORMACION EN FUNCION DE LAS CONDICIONES DE OPERACION DONDE SE DESEA REUTILIZAR EL MODELADO.

Space-Time Codes and MIMO Systems

Abstract: MIMO is the technology that is advancing the wireless industry from 3G to 4G systems, and this book is your essential guide to this major development in wireless communications. It takes you step-by-step from the basics of MIMO through various coding techniques, to topics such as multiplexing and packet transmission. Practical examples are emphasized and mathematics is kept to a minimum, so you can quickly and thoroughly understand the essentials of MIMO. The book takes a systems view of MIMO technology that helps you analyze the benefits and drawbacks of any MIMO system. You find detailed coverage of a hot new topic not covered in any other book - direct interfacing of a CDMA system with an OFDM system. This hardware approach extends the capabilities of current CDMA systems by exploiting the high-throughput capabilities of OFDM. Coupled with MIMO, this approach delivers a 4G solution that meets the ever-increasing need for higher throughput wireless communication. Space Time Codes and MIMO Systems is the only resource that offers you the practical knowledge needed to work with this powerful combination of cutting-edge wireless technology. For the errata of this book please visit http://www.jankiraman.com/errata.htm.

Development of models for designing industrial energy technologies related to cold production and storage

Abstract: Numerous industries use cold fluids in their processes. Large energy savings can be achieved through the efficient use of technologies such as refrigerators and cold storage. However, their integration requires detailed studies to fit the network and the demand. A simulation tool is often an asset to estimate the performance of a system. The objective of this thesis is to develop models related to cold production and storage, allowing a user to assess systems’ design and performances through dynamic simulations. The work is based on the Modelica/Dymola environment. The Modelica language offers an innovative way to model systems by using equations instead of assignment statements. Due to this acausality, the same model can have multiple purposes. The technologies modelled are a refrigerator, a combined refrigerator/heat pump and a latent heat storage with spherical phase-change material (PCM) capsules. The refrigerator and the combined refrigerator/heat pump are an assembling of four components that are also modelled: a compressor, a condenser, an expansion valve, and an evaporator. The development followed strict rules that allow a user to include these components in a larger network with other systems. The performance of the models was assessed during test cases. They reveal a good accuracy of the results, from a theoretical and experimental point of view. Some difficulties were encountered, most of them due to the nature of the language or the way the refrigerant properties were retrieved for calculations. The models are however functional for most of the industrial studies. Applications for the developed models are various. They can be used to assess the performance of an existing or future network. They also authorize sensitivity analysis thanks to their easy-to-configure parameters. Finally, they are also suitable for designing equipment. One example in the thesis describes the combination of a refrigerator and a cold storage which adapt their production according to a cooling demand.

On-chip temperature control circuit using common devices

Abstract: A circuit has been designed to control the temperature of the IC die upon which it resides. No special devices or layers are required. No external circuitry or special heat sinking is used. Equilibrium temperatures from below -40/spl deg/C to above +85/spl deg/C are attainable. Time to equilibrium is on the order of a few seconds. The 400/spl mu/m /spl times/ 500/spl mu/m circuit has been manufactured by the MOSIS service in a TSMC 0.25 micron process and installed in a 40-pin DIP package. Test results reveal temperature regulation within 0.3/spl deg/C for thermal control ranges of 4/spl deg/C to 40/spl deg/C.