Systems Simulation in Agriculture

Specificaties
Paperback, 180 blz. | Engels
Springer Netherlands | 0e druk, 2012
ISBN13: 9789401163750
Rubricering
Springer Netherlands 0e druk, 2012 9789401163750
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Samenvatting

A fast-growing interest in the concepts and application of systems research has spawned a wide and general literature over the past decade. Most disciplinary areas have been touched, but commerce, engineering and military studies have, perhaps, been best served with outstanding texts. No provision has so far been made for a general book at introductory level of direct relevance to agricultural science, technology and management. General reviews are, of course, valuable to the agricultural-systems researcher but agricultural systems, with important biological components interacting with equally vital social and economic elements, embody particular characteristics which influence the approach to their study. This book is written in the belief that the concepts as well as the technology of the systems approach have a basic role in the rational advancement of the agricultural discipline and in the improvement of efficiency in agricultural research and practice. A basic and introductory text is an essential pre­ requisite to this role being realised. A reiteration of basic concepts is expressed in the introductory chapter while in the final chapter particular attention is given to the general problems of integrating systems concepts in research, extension and practice. The dialogue of these chapters is necessarily brief and in some respects speculative but it is supported by appropriate bibliography. The main body of the text is concerned with the methodology of systems research; the conception, construction, implementation, validation and exploitation of computer-based simulation models of agricultural systems.

Specificaties

ISBN13:9789401163750
Taal:Engels
Bindwijze:paperback
Aantal pagina's:180
Uitgever:Springer Netherlands
Druk:0

Inhoudsopgave

1. Principles of Model-building.- Why the Computer?.- A Definition of System.- System Simulation.- A General Statement of Procedure in Systems Simulation.- Concluding Remarks.- The barley-leaf-rust model.- The pig-herd model.- 2. Model-construction.- Getting Started.- The Process of Modelling.- Summary.- Barley-leaf-rust model.- Pig-herd management model.- Workshop.- 3. Computer Considerations.- Choosing a Language.- The design of computer languages.- Choice of general-purpose or special-purpose language.- Selection of a special-purpose language.- Design Criteria for Computer Modelling.- Top-down model-design.- Modular programming.- Programming considerations.- Summary.- Workshop.- 4. Stochastic Specification.- The Case For and Against Stochasticity in Modelling.- The use of historical time-series data.- Generation of time series in the model.- Autocorrelation.- Testing for autocorrelation.- Accounting for autocorrelation.- Generating Random Variates.- Probability functions.- The pseudorandom-number generators.- Creating a stochastic event.- Some Final Words.- Workshop.- 5. Model-evaluation.- Testing Models Against Design Criteria (Verification).- Antibugging techniques.- Debugging techniques.- Validation of Simulation Models.- Validation Procedures.- Statistical testing.- Subjective assessment.- A Long-term View of Model-evaluation.- Validation of the barley-leaf-rust model.- 6. Design of Simulation Experiments.- Factors, Treatments and Replicates.- Computer-based Experimentation.- Single-factor experiments—deterministic model.- Single-factor experiments—stochastic model.- Experiments with a single factor at many levels.- Two experimental factors—deterministic model.- Two experimental factors—stochastic model.- Experiments with more than two factors.- Optimum-seeking Designs.- The method of steepest ascent.- Concluding Comments.- 7. Model-application.- Systems Involvement in the Research Process.- A conceptual view linking systems modelling and applied research.- Systems modelling and the direction of fundamental research.- Systems Involvement in Farmer Decision Making and Business Control.- Design Pointers for Successful Agricultural-information System Designs.- Future Developments in Agricultural-information Systems.- Skeleton Models in Applied Research Direction.- Final Synthesis.

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        Systems Simulation in Agriculture