Resultados de búsqueda - Variables (Mathematics)

A framework for the simulation of regional decadal variability for agricultural and other applications por Greene AM, Goddard L, Hansen, James

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Precision agriculture : a study of the profitability in a Swedish context por Karlsson, Anton, Nessvi, Christoffer

Materias: “…Variable rate technology…”

Generalised matrix and compartmental population models. por Mwambi, H.G.

“…After a brief introduction we present the Lotka's Integral equation in section 2.2 where age and time are treated as continuous variables. The solution to this equation is reviewed in section 2.3 first by elementary mathematical methods in sub-section 2.3.1 and by Laplace transforms in sub-section 2.3-.2. …”
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Multi-wheat-model ensemble responses to interannual climate variability por Ruane, Alex C., Hudson, Nicholas I., Asseng, Senthold, Camarrano, Davide, Ewert, Frank, Martre, Pierre, Boote, Kenneth J., Thorburn, Peter J., Aggarwal, Pramod K., Angulo, Carlos, Basso, Bruno, Bertuzzi, Patrick, Biernath, Christian, Brisson, Nadine, Challinor, Andrew J., Doltra, Jordi, Gayler, Sebastian, Goldberg, Richard A., Grant, Robert F., Heng, Lee, Hooker, Josh, Hunt, Leslie A., Ingwersen, Joachim, Izaurralde, Roberto César, Kersebaum, Kurt-Christian, Kumar, Soora Naresh, Müller, Christoph, Nendel, Claas, O’Leary, Garry J., Olesen, Jørgen E., Osborne, Tom M., Palosuo, Taru, Priesack, Eckart, Ripoche, Dominique, Rötter, Reimund P., Semenov, Mikhail A., Shcherbak, Iurii, Steduto, Pasquale, Stöckle, Claudio O., Stratonovitch, Pierre, Streck, Thilo, Supit, Iwan, Tao, Fulu, Travasso, Maria, Waha, Katharina, Wallach, Daniel, White, Jeffrey W., Wolf, Joost

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Considerations for gender-responsive mathematical modeling of agriculture and natural resource management por Micheletti, Giulia, Elias, Marlène

“…They serve as logical constructs that offer a simplified representation of complex systems to provide insights into a ‘perceived reality’ (McCarl 1984), or a specific part of their inner workings (Gershenfeld 1998). In particular, mathematical models focus on the effects of different components of the ‘target system,’ and describe or predict behaviors using mathematical concepts, theories, and language (ibid 1998). …”
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Validation of enteric methane emissions by cattle estimated from mathematical models using data from in vivo experiments por Molina-Botero, Isabel, Díaz-Céspedes, Medardo, Mayorga-Mogollón, Olga, Ku-Vera, Juan, Arceo-Castillo, Jeyder, Montoya-Flores, María Denisse, Arango, Jacobo, Gómez-Bravo, Carlos

“…Mathematical models using these variables show a large variability of results, being necessary to identify those which provide more precise and accurate predictions. …”
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Validation of enteric methane emissions by cattle estimated from mathematical models using data from in vivo experiments por Molina Botero, Isabel, Díaz Céspedes, Medardo, Mayorga Mogollón, Olga, Ku Vera, Juan, Arceo Castillo, Jeyder, Montoya Flores, María Denisse, Arango, Jacobo, Gómez Bravo, Carlos

“…Mathematical models using these variables show a large variability of results, being necessary to identify those which provide more precise and accurate predictions. …”
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Estimación del volumen sin corteza en Eucalyptus grandis utilizando modelos de regresión con variables instrumentales en dos etapas de plantaciones de la Mesopotamia argentina por Boca, Rosa Teresa, Keller, Aldo Esteban, Mastrandrea, Ciro Andres, Crechi, Ernesto Hector, Barth, Sara Regina, Winck, Rosa Ángela, Fassola, Hugo Enrique, Ferrere, Paula

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Alternative scenarios for improved operations at the main canal level: a study of Fordwah Branch, Chishtian Subdivision using a mathematical flow simulation model. (Thesis) por Litrico, X

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The economic value of the effect of weather variability on forest ecosystem services in Sweden por Uwizeye, Jean Damascene

“…This thesis aims to estimate the effect of weather variability and management practices on forest productivity and to calculate the total economic value of forest ecosystem services of timber and carbon sequestration in Sweden. …”

Oligonucleotide fingerprinting detects genetic variability at different levels in Nigerian Mycosphaerella fijiensis por Muller, R., Pasberg-Gauhl, C., Gauhl, F., Ramser, J., Kahl, G.

“…Mathematical analysis of the data produced dendrograms that demonstrated the presence of different genetically related groups of Mycosphaerella fijiensis in Nigeria.…”
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Spatial continuity in tree diameter distribution por Berhe, Leakemariam

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Effekter av styrmedel på fordonsgasmarknaden por Carlgren, Andrea

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Updating and estimating a Social Account Matrix using cross entropy methods por Robinson, Sherman, Cattaneo, Andrea, El-Said, Moataz

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The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria por Kamga, Samuel F., Ndjomatchoua, Frank T., Guimapi, Ritter A., Klingen, Ingeborg, Tchawoua, Clément, Hjelkrem, Anne-Grete Roer, Thunes, Karl H., Kakmeni, Francois M.

“…This approach provides a tool for evaluating the impact of climatic variables such as temperature and relative humidity and mapping spatial variability on the efficacy of M. acridum as a biocontrol agent against desert locust invasion in Africa. …”
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Role of inputs, institutions, and technical innovations in stimulating growth in Chinese agriculture por Fan, Shenggen, Pardey, Philip G.

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Climate change impacts on crop yields in Ethiopia por Thomas, Timothy S., Dorosh, Paul A., Robertson, Richard D.

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Priset på åkermark por Lundell, Anders, Östlund, Jonas

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Can smallholder farmers adapt to climate variability, and how effective are policy interventions? Agent-based simulation results for Ethiopia por Berger, T., Troost, C., Assfaw Wossen, Tesfamicheal, Latynskiy, E., Tesfaye, K., Gbegbelegbe, Sika

“…This study applies stochastic bioeconomic modeling to analyze smallholder adaptation to climate and price variability in Ethiopia. It uses the agent-based simulation package Mathematical Programming-based Multi-Agent Systems (MPMAS) to capture nonseparable production and consumption decisions at household level, considering livestock and eucalyptus sales for consumption smoothing, as well as farmer responses to policy interventions. …”
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Estrategias de Modelación Para Datos de Conteo con Exceso de Ceros. Una Ilustración asociada a Ecología de Poblaciones por Menni, María Fernanda

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