106 resultados para Sistema de suporte de decisão
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This research aimed to develop a Fuzzy inference based on expert system to help preventing lameness in dairy cattle. Hoof length, nutritional parameters and floor material properties (roughness) were used to build the Fuzzy inference system. The expert system architecture was defined using Unified Modelling Language (UML). Data were collected in a commercial dairy herd using two different subgroups (H-1 and H-2), in order to validate the Fuzzy inference functions. The numbers of True Positive (TP), False Positive (FP), True Negative (TN), and False Negative (FN) responses were used to build the classifier system up, after an established gold standard comparison. A Lesion Incidence Possibility (LIP) developed function indicates the chances of a cow becoming lame. The obtained lameness percentage in H-1 and H-2 was 8.40% and 1.77%, respectively. The system estimated a Lesion Incidence Possibility (LIP) of 5.00% and 2.00% in H-1 and H-2, respectively. The system simulation presented 3.40% difference from real cattle lameness data for H-1, while for H-2, it was 0.23%; indicating the system efficiency in decision-making.
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Many researchers emphasize the increasing dynamics of business globalization, virtually as a new order of driving rules to be considered and included regarding operations management. In this sense, and trying to attain a set of suitable competitive conditions according to the needs of their business, the very internal processes of management and decision making have been growing in terms of complexity and range of issues to be considered. To do so, it is important to understand and absorb possible changes in competitive conditions as they arise. This paper aims to present a conceptual model and a case study to illustrate the assessment of the relationships involving actors within an operations network. The understanding of the basis behind these relationships and the identification of the existing hierarchic profile governing them, represent primary items to be considered embedded in a decision making system. The results obtained suggest the possibility to make use of the proposed model as an auxiliary tool to assess existing relationships within an operations network.
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Watersheds are considered important study units when it comes to environmental planning, with regard to the optimal use of water resources. Water scarcity is predicted and feared by many societies, and proves to be an increasingly tangible problem nowadays. Still from the perspective of extreme events, this dissertation considers the study of flood waves in the sub-basin of the stream Claro, which belongs to the Corumbataí watershed. - SP, since thay can also have devastating effects for the population, A Decision Support System for Flood Routing Analysis in Complex Basins, ABC 6 software was applied in order to obtain hydrographs and peak flows in the sub-basin of the stream Claro, for return periods of 10 and 100 years, aiming to comprise events of different magnitudes. The model Soil Conservation Service (SCS) and the triangular SCS hydrograph were adopted for the simulations. Simultaneously, the Kokei Uehara method was applied for the obtainment of peak flow values under the same conditions, seeking to compare results. Data collection was performed using geoprocessing tools. For data entry in ABC 6, the fragmentation of sub-basin of the stream Claro was necessary, which generated 7 small watersheds, in order to fulfill a software demand, as the maximum drainage area it accepts is 50km² for each watershed analyzed. For RT = 10 and 100 years, respectively, the results of peak flow with use of ABC 6 were 46.10 and 95.45 m³/s, while for Kokei Uehara method, the results were 47.17 and 65.26 m³/s. The adoption of a single value of discretization time for all watersheds was indicated as limitation of ABC 6, which interfered in the final results. Kokei method Uehara considered the sub-basin of the stream Claro as a whole, which reduced the error accumulation probability
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Geografia - IGCE
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Geociências e Meio Ambiente - IGCE
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Engenharia Elétrica - FEIS
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Pós-graduação em Ciências Cartográficas - FCT
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In the current economic scenario of constant changes, industries seek to increase their profitability decreasing inventory levels. Maintenance and maintenance management, combined with the inventory management of spare parts, has assumed a position of competitive advantage in business. Stock only what you need has become a difficult decision for managers, who are faced with the lack of models and criteria to assist this decision-making. This work proposes a method which supports decision making, on a MATLAB modeling, using criteria established by an expert and his maintenance workers team, focusing on no regular demand of spare parts. The proposed model was adequate to the needs of the company and the maintenance manager in the decision on the storage
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In order to maintain the competitiveness the companies seek for cost reduction and resource optimization. A product or service price is calculated considering direct and indirect costs involved in its fabrication, which means that if an intern indirect process is optimized, the final price of the product is also reduced and becomes more interesting to the final costumer. Considering this reasoning, the companies must evaluate each of their processes and optimize them. It is common to outsource intern products manufacturing as a cost reduction strategy, nevertheless when there are already resources and capability to produce the own goods, it becomes necessary to evaluate the economic gain that each strategy - make or buy - generates. This paper aims to evaluate the necessary support to take a decision regarding making or buying in a production cell of hoses based in the value of economic cost, system cost and decision process
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Visou-se estabelecer a relação entre a infestação da traça-do-tomateiro, Tuta absoluta, na planta e adultos capturados em armadilhas com feromônio sexual e a produtividade, para avaliar a influência da infestação na produção da cultura do tomate e aperfeiçoar a tomada de decisão de controle pela densidade de adultos. Armadilhas com feromônio sexual foram instaladas e avaliadas duas vezes por semana, em três áreas de cultivo comercial de tomateiro em São Paulo (Mogi-Guaçu, Tambaú e Sorocaba), em sistema estaqueado, divididas em áreas experimentais com cerca de 18.000 plantas cada (1,5 ha). Nas mesmas datas foi avaliada a infestação de pragas nas plantas, estendendo-se até o término da colheita. A produtividade foi definida pelo total de caixas (24 kg) comercializadas/1.000 plantas. A relação entre a produção da cultura do tomate e a infestação de T. absoluta na planta ou nas armadilhas com feromônio foi expressa por uma equação linear e negativa. A ocorrência de adultos nas armadilhas e a infestação da praga em plantas foram relacionados significativamente com a redução da produtividade. O nível de controle de T. absoluta através do monitoramento com feromônio sexual foi de 45 ± 19,50 insetos/dia na armadilha.
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Os efeitos do tráfego de máquinas nos atributos do solo de acordo com o tempo de adoção do sistema plantio direto são ainda pouco pesquisados em ambientes tropicais, e muitas dúvidas ainda persistem sobre a variação dinâmica da estrutura do solo e a sua interação com máquinas e equipamentos. Objetivou-se com este estudo avaliar o efeito do tempo de adoção do sistema plantio direto, comparativamente com área de mata nativa e de preparo convencional, usando os modelos de compressibilidade do solo. O estudo foi realizado em um Nitossolo Vermelho distroférrico, sob mata nativa (MN), preparo convencional (PC), plantio direto com um ano (PD1), plantio direto com quatro anos (PD4), plantio direto com cinco anos (PD5) e plantio direto com 12 anos (PD12). Amostras indeformadas e deformadas foram coletadas em duas profundidades (0-5 e 10-15 cm). O tempo de adoção do sistema plantio direto alterou o comportamento compressivo dos solos em ambas as profundidades, por meio das mudanças na pressão de preconsolidação. A profundidade de 0-5 cm apresentou menor capacidade de suporte de carga do que a profundidade de 10-15 cm. A profundidade de 0-5 cm, em todos os sistemas de manejo, mostrou-se mais susceptível à compactação em relação à profundidade de 10-15 cm. Os sistemas de plantio direto e convencional apresentaram a capacidade de suporte de carga crescente na seguinte ordem: PD5 < PD12 < PD1 < PD4 @ PC, para a profundidade de 0-5 cm e para a profundidade de 10-15 cm: MN @ PD12 < PC @ PD4 < PD5, enquanto o sistema PD1 apresentou comportamento diferenciado.