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| Registros recuperados: 17.461 | |
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| C. Fritzsche; H.-P. Deunow. |
| In the chapter we discussed a control approach for torque control of gasoline engines. Because of several actuating variables and control requirements the process to be controlled is multivariable. The actuating variables are usually bounded and the effects on the engine torque are nonlinear. Hence direct use of the actuator variables for torque control generally produces plenty of problems. The two layer approach described in the chapter allows the application of standard control methods. The main idea of the control structure is to compensate or... |
| Tipo: 14 |
Palavras-chave: New Approaches in Automation and Robotics. |
| Ano: 2008 |
URL: http://www.intechopen.com/articles/show/title/advanced_torque_control |
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| Chalak, Morteza; Pannell, David J.; Polyakov, Maksym. |
| Invasive species are significant threats to biodiversity, natural ecosystems and agriculture leading to large worldwide economic and environmental damage. Spread and control of invasive species are stochastic processes with important spatial dimensions. Most economic studies of invasive species control ignore spatial and stochastic aspects. This paper covers this gap in the previous studies by analysing a spatially explicit dynamic process of controlling invasive species in a stochastic setting. We show how stochasticity, spatial location of infestation and control can influence the spread, control efficiency and optimal... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy; Land Economics/Use. |
| Ano: 2011 |
URL: http://purl.umn.edu/115513 |
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| Jespersen, L.M.. |
| In the increasing organic market in Europe, more and more of the organic food is sold via big retail chains. This development implies that an increasing trade with organic food takes place over long distances and across borders in Europe. Therefore, the control of organic products through the food chain “from farm to fork” has become increasingly important, because the organic inspection and certification system is the only guarantee to the consumer that the organic food products they buy really are organic. At the European level quite a lot of research has been done on various aspects of organic farming and marketing of organic food products, but little is known about the organic certification system at EU level as... |
| Tipo: Report |
Palavras-chave: "Organics" in general Values; Standards and certification. |
| Ano: 2011 |
URL: http://orgprints.org/18440/4/18440.pdf |
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| Rasmussen, Ilse A.. |
| A series of field experiments were carried out in winter wheat grown under organic conditions in Denmark on fields with different weed pressure. The treatments were sowing strategy (normal sowing time, late sowing and false seedbed), row distance (12 cm and 24 cm row distance) and weed control method (untreated, mechanical weed control (weed harrowing at 12 cm supplemented with row hoeing at 24 cm), and herbicide weed control). Weed biomass was largest at the normal sowing time and was reduced by mechanical or chemical weed control. Row distance alone did not generally influence weed biomass, but mechanical weed |
| Tipo: Journal paper |
Palavras-chave: Weed management Crop husbandry Cereals; Pulses and oilseeds. |
| Ano: 2002 |
URL: http://orgprints.org/215/1/vihveart_wr_rev.doc |
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| Johnston, Jim H.. |
| An economic problem exists in the allocation of resources to cattle tick control. The decisions of private individuals on tick control are unlikely to result in a desirable allocatin from society's viewpoint because of market failure. Such market failure will be due to significant externalities, risk and economies of scale in cattle tick control and ignorance of tick control by producers. Government involvement is justified to achieve a better allocation of resources than would otherwise occur. Choice of the desirable level of Government involvement and of the best control strategy will... |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1975 |
URL: http://purl.umn.edu/9194 |
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| Schäfer, Winfried. |
| Pest control in organic production of berries, potatoes and vegetables usually employs spreading technique of registered phytopharmaceutical agents. This technique may be supported or even replaced by pneumatic pest control. Pneumatic pest control means suction of pest using a vacuum device similar to a home vacuum cleaner. Up to now there is no evaluation of pneumatic pest control available from an agricultural engineering point of view. This paper concerns the following questions: Which techniques of pneumatic pest control are available and how may these techniques be improved in terms... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2005 |
URL: http://orgprints.org/4667/1/4667.pdf |
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| Mauldon, Roger G.. |
| Types of control are briefly reviewed. It is asserted that control problems are of growing importance in farm management. Opportunities for control in farming are identified. An outline is given of the necessary ingredients of a financial control system for farm management. By way of example, a test is made of a hypothesis about the nature of financial control among a sample of commercial farmers. Finally, problems of planning for control are briefly examined. |
| Tipo: Journal Article |
Palavras-chave: Agricultural Finance. |
| Ano: 1973 |
URL: http://purl.umn.edu/22886 |
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| Cho, Jaesung; Tauer, Loren W.; Schukken, Ynte H.; Smith, Rebecca L.; Lu, Zhao; Grohn, Yrjo T.. |
| Infectious diseases play a critical role in determining the profitability of individual farms and maintaining the viability of livestock industries, international trade, and trade policies. Thus, it is critical to analyze the economic consequences of infectious diseases, and the effects of producer strategies to control or eliminate diseases in a cost efficient approach. Also, important is the goal to rally support for the development of public disease control programs. This study examined the long-term feasibility and effectiveness of various producer strategies to prevent and control Johne’s disease in dairy herds, an infectious and incurable disease... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Animal disease control; Dairy herd model; Johne's disease; Optimal control model; Paratuberculosis; Agribusiness; Farm Management; Livestock Production/Industries; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2010 |
URL: http://purl.umn.edu/61318 |
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| Registros recuperados: 17.461 | |
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