|
|
Registro Completo |
Biblioteca(s): |
Embrapa Agricultura Digital. |
Data corrente: |
02/01/2019 |
Data da última atualização: |
21/01/2020 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
RODRIGUES, L. S.; REZENDE, S. O.; MOURA, M. F.; MARCACINI, R. M. |
Afiliação: |
LUCAS S. RODRIGUES, UFMS; SOLANGE O. REZENDE, UFSCar; MARIA FERNANDA MOURA, CNPTIA; RICARDO M. MARCACINI, UFMS. |
Título: |
Agribusiness time series forecasting using perceptually important events. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
In: LATIN AMERICAN COMPUTING CONFERENCE, 44., 2018, São Paulo. Anais... São Paulo: Mackenzie, 2018. |
Páginas: |
10 p. |
Idioma: |
Inglês |
Notas: |
CLEI 2018. |
Conteúdo: |
Resumo- Modern agribusiness management incorporates instruments for risk management with the objective of mitigating uncertainties to the producer. In this context, the producer (riskaverse) transfer the risk of price oscillation to companies or individuals that operate in the futures market and who expect to receive a payment (risk premium) for assuming such risk. Defining the adequate strategies for risk management depends on the knowledge about the problem to determine prices ranges in the future. Recent studies demonstrate that time series forecasting can be significantly improved by considering additional inforation about the problem. In particular, besides the historical time series, textual knowledge extracted from the news portals, social networking and other public data sources available in the web may also be used. This paper presents an approach for agribusiness time series forecasting that allows incorporating external knowledge in the form of events extracted from news about agribusiness, without the need to previously label textual information. In this case, periods of significant uptrends and downtrends of time series are automatically identified - known in the literature as perceptually important points (PIP). We extend the concept of PIP to news events, where similar events published with a certain regularity in periods of uptrends and owntrends are selected as perceptually important events to improve time series forecasting models. An experimental evaluation based on price prediction on ten corn futures contracts (derivatives) provides evidence that the proposed approach is promising. MenosResumo- Modern agribusiness management incorporates instruments for risk management with the objective of mitigating uncertainties to the producer. In this context, the producer (riskaverse) transfer the risk of price oscillation to companies or individuals that operate in the futures market and who expect to receive a payment (risk premium) for assuming such risk. Defining the adequate strategies for risk management depends on the knowledge about the problem to determine prices ranges in the future. Recent studies demonstrate that time series forecasting can be significantly improved by considering additional inforation about the problem. In particular, besides the historical time series, textual knowledge extracted from the news portals, social networking and other public data sources available in the web may also be used. This paper presents an approach for agribusiness time series forecasting that allows incorporating external knowledge in the form of events extracted from news about agribusiness, without the need to previously label textual information. In this case, periods of significant uptrends and downtrends of time series are automatically identified - known in the literature as perceptually important points (PIP). We extend the concept of PIP to news events, where similar events published with a certain regularity in periods of uptrends and owntrends are selected as perceptually important events to improve time series forecasting models. An experimental evaluatio... Mostrar Tudo |
Palavras-Chave: |
Séries temporais. |
Thesagro: |
Agronegócio. |
Thesaurus Nal: |
Agribusiness; Risk management. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/189590/1/agribusiness-time.pdf
|
Marc: |
LEADER 02297nam a2200217 a 4500 001 2102768 005 2020-01-21 008 2018 bl uuuu u00u1 u #d 100 1 $aRODRIGUES, L. S. 245 $aAgribusiness time series forecasting using perceptually important events.$h[electronic resource] 260 $aIn: LATIN AMERICAN COMPUTING CONFERENCE, 44., 2018, São Paulo. Anais... São Paulo: Mackenzie$c2018 300 $a10 p. 500 $aCLEI 2018. 520 $aResumo- Modern agribusiness management incorporates instruments for risk management with the objective of mitigating uncertainties to the producer. In this context, the producer (riskaverse) transfer the risk of price oscillation to companies or individuals that operate in the futures market and who expect to receive a payment (risk premium) for assuming such risk. Defining the adequate strategies for risk management depends on the knowledge about the problem to determine prices ranges in the future. Recent studies demonstrate that time series forecasting can be significantly improved by considering additional inforation about the problem. In particular, besides the historical time series, textual knowledge extracted from the news portals, social networking and other public data sources available in the web may also be used. This paper presents an approach for agribusiness time series forecasting that allows incorporating external knowledge in the form of events extracted from news about agribusiness, without the need to previously label textual information. In this case, periods of significant uptrends and downtrends of time series are automatically identified - known in the literature as perceptually important points (PIP). We extend the concept of PIP to news events, where similar events published with a certain regularity in periods of uptrends and owntrends are selected as perceptually important events to improve time series forecasting models. An experimental evaluation based on price prediction on ten corn futures contracts (derivatives) provides evidence that the proposed approach is promising. 650 $aAgribusiness 650 $aRisk management 650 $aAgronegócio 653 $aSéries temporais 700 1 $aREZENDE, S. O. 700 1 $aMOURA, M. F. 700 1 $aMARCACINI, R. M.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
03/08/1993 |
Data da última atualização: |
26/11/2019 |
Autoria: |
CAPALBO, D. M. F.; CONTIERI, R. C.; CANDIDO, A. C. C.; SOARES, C. M.; MORAES, I. O.; CONTI, H. H. |
Afiliação: |
EMBRAPA-CNPMA. |
Título: |
Bacillus thuringiensis: busca de atividade no controle de doenca de plantas. |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
In: SIMPOSIO DE CONTROLE BIOLOGICO, 3., 1992, Aguas de Lindoia. Anais. Jaguariuna: EMBRAPA-CNPDA, 1992. |
Páginas: |
p. 289 |
Idioma: |
Português |
Palavras-Chave: |
Colletotrichum sp. |
Thesagro: |
Bacillus Thuringiensis; Controle Biológico; Doença; Fusarium Solani; Planta. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/205553/1/Capaldo-bacillus.pdf
|
Marc: |
LEADER 00779naa a2200253 a 4500 001 1010740 005 2019-11-26 008 1992 bl uuuu u00u1 u #d 100 1 $aCAPALBO, D. M. F. 245 $aBacillus thuringiensis$bbusca de atividade no controle de doenca de plantas.$h[electronic resource] 260 $c1992 300 $ap. 289 650 $aBacillus Thuringiensis 650 $aControle Biológico 650 $aDoença 650 $aFusarium Solani 650 $aPlanta 653 $aColletotrichum sp 700 1 $aCONTIERI, R. C. 700 1 $aCANDIDO, A. C. C. 700 1 $aSOARES, C. M. 700 1 $aMORAES, I. O. 700 1 $aCONTI, H. H. 773 $tIn: SIMPOSIO DE CONTROLE BIOLOGICO, 3., 1992, Aguas de Lindoia. Anais. Jaguariuna: EMBRAPA-CNPDA, 1992.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|