76 resultados para least weighted squares
Filtro por publicador
- Aberystwyth University Repository - Reino Unido (6)
- Academic Archive On-line (Mid Sweden University; Sweden) (1)
- AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
- Aquatic Commons (11)
- Archive of European Integration (6)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (8)
- Aston University Research Archive (8)
- Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
- B-Digital - Universidade Fernando Pessoa - Portugal (1)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (9)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (5)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (6)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (10)
- Boston University Digital Common (10)
- Brock University, Canada (10)
- Bulgarian Digital Mathematics Library at IMI-BAS (6)
- CaltechTHESIS (12)
- Cambridge University Engineering Department Publications Database (45)
- CentAUR: Central Archive University of Reading - UK (34)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (76)
- Cochin University of Science & Technology (CUSAT), India (13)
- Collection Of Biostatistics Research Archive (3)
- Corvinus Research Archive - The institutional repository for the Corvinus University of Budapest (5)
- Deakin Research Online - Australia (35)
- DI-fusion - The institutional repository of Université Libre de Bruxelles (4)
- Digital Commons at Florida International University (5)
- DigitalCommons@The Texas Medical Center (4)
- Duke University (11)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (27)
- Greenwich Academic Literature Archive - UK (4)
- Helda - Digital Repository of University of Helsinki (18)
- Indian Institute of Science - Bangalore - Índia (140)
- Instituto Politécnico do Porto, Portugal (6)
- Massachusetts Institute of Technology (4)
- Ministerio de Cultura, Spain (1)
- Nottingham eTheses (1)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (1)
- Publishing Network for Geoscientific & Environmental Data (11)
- QSpace: Queen's University - Canada (1)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (95)
- Queensland University of Technology - ePrints Archive (189)
- Repositorio Academico Digital UANL (1)
- Repositório Alice (Acesso Livre à Informação Científica da Embrapa / Repository Open Access to Scientific Information from Embrapa) (1)
- Repositório Científico da Universidade de Évora - Portugal (5)
- Repositório digital da Fundação Getúlio Vargas - FGV (3)
- Repositório do Centro Hospitalar de Lisboa Central, EPE - Centro Hospitalar de Lisboa Central, EPE, Portugal (2)
- Repositório Institucional da Universidade de Aveiro - Portugal (13)
- Repositorio Institucional de la Universidad Pública de Navarra - Espanha (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (18)
- Repositorio Institucional Universidad de Medellín (1)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (6)
- SAPIENTIA - Universidade do Algarve - Portugal (10)
- SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (1)
- Universidad del Rosario, Colombia (9)
- Universidad Politécnica de Madrid (6)
- Universidade de Lisboa - Repositório Aberto (1)
- Universidade Federal do Pará (2)
- Universidade Federal do Rio Grande do Norte (UFRN) (1)
- Universidade Técnica de Lisboa (1)
- Universitat de Girona, Spain (6)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (5)
- Université de Lausanne, Switzerland (7)
- Université de Montréal, Canada (20)
- Université Laval Mémoires et thèses électroniques (1)
- University of Connecticut - USA (1)
- University of Michigan (6)
- University of Queensland eSpace - Australia (2)
- University of Southampton, United Kingdom (1)
- WestminsterResearch - UK (1)
Resumo:
The heat capacities (C-p) of five types of gasohol (50 wt % ethanol and 50 wt % unleaded gasoline 93(#) (E50), 60 wt % ethanol and 40 wt % unleaded gasoline 93(#) (E60), 70 wt % ethanol and 30 wt % unleaded gasoline 93(#) (E70), 80 wt % ethanol and 20 wt % unleaded gasoline 93(#) (E80), and 90 wt % ethanol and 10 wt % unleaded gasoline 93(#) (E90), where the "93" denotes the octane number) were measured by adiabatic calorimetry in the temperature range of 78-320 K. A glass transition was observed at 95.61, 96.14, 96.56, 96.84, and 97.08 K for samples from the E50, E60, E70, E80, and E90 systems, respectively. A liquid-solid phase transition and a solid-liquid phase transition were observed in the respective temperature ranges of 118-153 and 155-163 K for E50, 117-150 and 151-164 K for E60, 115-154 and 154-166 K for E70, 113-152 and 152-167 K for E80, and 112-151 and 1581-167 K for E90. The polynomial equations of Cp and the excess heat capacities (C-p(E)), with respect to the thermodynamic temperature, were established through least-squares fitting. Based on the thermodynamic relationship and the equations obtained, the thermodynamic functions and the excess thermodynamic functions of the five gasohol samples were derived.