{"title":"Computational Model of a Buncher Cavity for Millimetric Klystron","authors":"A. Leggieri, D. Passi, F. Paolo, G. Saggio","doi":"10.1109/EMS.2015.76","DOIUrl":"https://doi.org/10.1109/EMS.2015.76","url":null,"abstract":"A computational model of a Buncher cavity for millimetric klystron following a Multiphysics approach is proposed in this paper. At these narrow dimensions, the device is critically exposed to multiple physics effects, due to the power dissipations and external environment, influencing the electromagnetic performances. The cavity is integrated with a carbon nanotube cold cathode in order to reduce thermal expansion and cooled by an opportune airflow that regulates the temperature distribution to compensate the resonant frequency shift. Electromagnetic fields and scattering parameters have been tested in operative conditions by concurrent computation of coupled thermodynamic, fluid dynamic, structural mechanics and electromagnetic simulations. This approach has suggested the appropriate materials and geometrical shapes.","PeriodicalId":253479,"journal":{"name":"2015 IEEE European Modelling Symposium (EMS)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128044581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Embedding Sectorial Models in an Integrated Platform for Assessing Climate Change Impacts","authors":"Cristina Savin","doi":"10.1109/EMS.2015.16","DOIUrl":"https://doi.org/10.1109/EMS.2015.16","url":null,"abstract":"Climate change in the last decades has occurred not only as a result of extreme natural factors but as the effect of human interference in environment well-functioning. Having this aspect in mind, a prominent need for a software tool to quantify the bidirectional link between human influence and the balance of the natural system has emerged. This article presents such an on-line platform - CLIMSAVE Integrated Assessment Platform (IAP) - which aims to simulate and visualize a series of indicators covering a variety of key sectors such as: urban, forest, water in various states of aggregation, flood, agriculture, yield, and biodiversity. Each of these sectors has one or more corresponding simplified models that transpose the impact of climate change effects experienced by mankind into qualitative and quantitative data. Results presented at the end of this article confirm and validate the models integrated within the platform. The interactivity of the tool is enhanced by allowing the user to visualize output indicators with the help of GIS maps. The novelty introduced by CLIMSAVE IAP consists in offering a big picture that comprises the interactions between important sectors rather than a narrow and isolated image of each sector.","PeriodicalId":253479,"journal":{"name":"2015 IEEE European Modelling Symposium (EMS)","volume":"414 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129279444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mustafa Inci, T. Demirdelen, K. Bayındır, M. Tümay
{"title":"The Analysis and Performance Results of Bidirectional DC-DC Converter Based Dynamic Voltage Restorer under Voltage Sag/Swell Conditions","authors":"Mustafa Inci, T. Demirdelen, K. Bayındır, M. Tümay","doi":"10.1109/EMS.2015.45","DOIUrl":"https://doi.org/10.1109/EMS.2015.45","url":null,"abstract":"This paper presents Dynamic Voltage Restorer (DVR) based on bidirectional full-bridge dc-dc converter to compensate severe voltage sag/swell problems in medium voltage system. Voltage swell causes the continuous rise at dc-link voltage of DVR which may damage the dc-link capacitors and solid-state devices, and increase the power losses. Unidirectional dc-dc converters based DVRs do not allow power flow from dc link of inverter to battery. This condition may damage the dc-link capacitors and solid-state devices, and increase the power losses. The main contribution of this study is that bidirectional dc-dc converter permits the DVR to prevent voltage rise at DC link capacitor under severe voltage swell conditions. In this topology, power can flow both from battery to multilevel inverter and vice versa. For this propose, a control algorithm based on Proportional-Integrator (PI) control is developed for bidirectional dc-dc converter. This algorithm can keep the DC link voltage constant during voltage sag/swell. The performance results of proposed topology and control method is verified with PSCAD/EMDTC.","PeriodicalId":253479,"journal":{"name":"2015 IEEE European Modelling Symposium (EMS)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129330435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
