Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 17.502
Primeira ... 123456789 ... Última
Imagem não selecionada

Imprime registro no formato completo
Advanced Torque Control InTech
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
Imagem não selecionada

Imprime registro no formato completo
Combined Torque and Velocity Control of a Redundant Robot System InTech
Damir Omrcen; Leon Zlajpah; Bojan Nemec.
The use of the robots in the real world mostly depends on the development of a autonomous robotic systems that integrate mobility and manipulability. This chapter has presented a new approach to the robot control. The control is called combined control since it combines (integrates) two different types of robot control, i.e. the torque and the velocity control in a single robot system. Later on the mathematical analysis of the proposed combined control has been shown. Verification has been done on a simulated and a real system composed of a velocity...
Tipo: 3 Palavras-chave: Mobile Robotics; Moving Intelligence.
Ano: 2006 URL: http://www.intechopen.com/articles/show/title/combined_torque_and_velocity_control_of_a_redundant_robot_system
Imagem não selecionada

Imprime registro no formato completo
Managing invasive alien mollusc species in rice International Rice Research Institute
Joshi, R. C..
p.5-13
Palavras-chave: Biological control; Biological control agents; Chemical control; Disease vectors; Farmers' attitudes; Feeds; Mollusc control; Molluscicides; Plant pests; Pest control; Reviews; Spread; Weed control; Snails; Pomacea canaliculata.
Ano: 2005 URL: http://hdl.handle.net/123456789/1141
Imagem não selecionada

Imprime registro no formato completo
Vision-based Motion Control of a Biped Robot Using 2 DOF Gaze Control Structure InTech
Shun Ushida; Koichiro Deguchi.
In this paper, we discussed both a necessity and importance of gaze control mechanism on vision-based motion control of biped robots. Human eye structure and the eye movements, and brain motor control through a central nervous system were considered as an analogy with robotics. In fact, human has powerful control mechanism with vision in order to realize a various type of motions against uncertain environments. As a result, we showed that gaze control mechanism and integrated hierarchical structure like human motor control are indispensable for a vision...
Tipo: 13 Palavras-chave: Humanoid Robots; Human-like Machines.
Ano: 2007 URL: http://www.intechopen.com/articles/show/title/vision-based_motion_control_of_a_biped_robot_using_2_dof_gaze_control_structure
Imagem não selecionada

Imprime registro no formato completo
Economics of Controlling Invasive Species: A Stochastic Optimisation Model for a Spatial-Dynamic Process AgEcon
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
Imagem não selecionada

Imprime registro no formato completo
Economics of controlling invasive species: a stochastic optimisation model for a spatial-dynamic process AgEcon
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: Spatial; Dynamics; Invasive; Economics; Stochastic; Optimisation; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103325
Imagem não selecionada

Imprime registro no formato completo
Bio-Inspired Interaction Control of Robotic Machines for Motor Therapy InTech
Loredana Zollo; Domenico Formica; Eugenio Guglielmelli.
In this chapter basic criteria for the design and implementation of interaction control of robotic machines for motor therapy have been briefly introduced and two bio-inspired compliance control laws developed by the authors to address requirements coming from this specific application field have been presented. The two control laws are named the coactivation-based compliance control in the joint space and the torque-dependent compliance control in the joint space, respectively. They try to overcome limitations of the traditional interaction control by...
Tipo: 33 Palavras-chave: Rehabilitation Robotics.
Ano: 2007 URL: http://www.intechopen.com/articles/show/title/bio-inspired_interaction_control_of_robotic_machines_for_motor_therapy
Imagem não selecionada

Imprime registro no formato completo
ORGANIC CERTIFICATION IN SELECTED EUROPEAN COUNTRIES: CONTROL FEES AND SIZE OF THE SECTOR Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
Proceedings of the Conference on Weed Control in Rice, 31 August - 4 September 1981. International Rice Research Institute
Conference on Weed Control in Rice (1981 : IRRI).; International Rice Research Institute.; International Weed Science Society..
422 p. : ill., maps
Tipo: Book Palavras-chave: Weed control; Weed.
Ano: 1983 URL: http://hdl.handle.net/123456789/920
Imagem não selecionada

Imprime registro no formato completo
Development of tools for automated physical weed control Organic Eprints
Nørremark, Michael; Melander, Bo.
Tools are being developed for automated physical weed control in the close to crop area. The most promising weed control concepts are the so-called high precision tillage solutions and thermal weed control by pulsed lasers.
Tipo: Newspaper or magazine article Palavras-chave: Weed management.
Ano: 2009 URL: http://orgprints.org/16206/1/16206.pdf
Imagem não selecionada

Imprime registro no formato completo
Reinforcement Learning-Based Supervisory Control Strategy for a Rotary Kiln Process InTech
Xiaojie Zhou; Heng Yue; Tianyou Chai.
In this chapter, we focus on the discussion about an implementation strategy of how to employ reinforcement learning in control of a typical complex industrial process to enhance control performance and adaptability for the variations of operating conditions of the automatic control system. Operation of large rotary kilns is difficult and relies on experienced human operators observing the burning status, because of their inherent complexities. Thus the problem of human-machine coordination is addressed when we design the rotary kiln control system, and the human intervention and adjustment can be introduced. Except for...
Tipo: 17 Palavras-chave: Reinforcement Learning.
Ano: 2008 URL: http://www.intechopen.com/articles/show/title/reinforcement_learning-based_supervisory_control_strategy_for_a_rotary_kiln_process
Imagem não selecionada

Imprime registro no formato completo
The effect of sowing strategy, row distance and mechanical weed control on weeds and yield in organic winter wheat Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
PUBLIC POLICY ON CATTLE TICK CONTROL IN NEW SOUTH WALES AgEcon
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
Imagem não selecionada

Imprime registro no formato completo
Control of a Flexible Manipulator with Noncollocated Feedback: Time Domain Passivity Approach InTech
Jee-Hwan Ryu; Dong-Soo Kwon; Blake Hannaford.
In this paper, we propose a stability guaranteed control scheme of noncollocated feedback control systems without any model information. The main contribution of this research is proposing a method to implement the PO/PC for a possibility active plant due to the noncollocated feedback. We separate the active plant into passive one and a transfer function from the collocated output to the noncollocated output. Therefore, the control system can be fit to our PO/PC framework. As a result, we can achieve stable control even for the noncollocated control system.
Tipo: 20 Palavras-chave: Parallel Manipulators; New Developments.
Ano: 2008 URL: http://www.intechopen.com/articles/show/title/control_of_a_flexible_manipulator_with_noncollocated_feedback__time_domain_passivity_approach
Imagem não selecionada

Imprime registro no formato completo
Networked Control Systems for Electrical Drives InTech
Baluta Gheorghe; Lazar Corneliu.
In this chapter, a remote control laboratory for electrical drive systems is presented. The laboratory allows the students to develop network based control systems using an architecture based on I/O devices, communication modules and server-client application implemented with Lookout and LabVIEW environment facilities and to operate on real electrical drive systems through Intranet and Internet. Three examples were presented demonstrating the potentiality of the networked control system laboratory to remotely control the electrical drive systems and to develop new network based control...
Tipo: 5 Palavras-chave: New Approaches in Automation and Robotics.
Ano: 2008 URL: http://www.intechopen.com/articles/show/title/networked_control_systems_for_electrical_drives
Imagem não selecionada

Imprime registro no formato completo
Vector-borne disease control in humans through rice agroecosystem management: proceedings. International Rice Research Institute
Workshop on Research and Training Needs in the Field of Integrated Vector-Borne Disease Control in Riceland Agroecosystems of Developing Countries (1987 : IRRI).; International Rice Research Institute..
237 p. : ill.
Tipo: Book Palavras-chave: Human diseases; Farmers; Vectors; Disease control; Epidemiology; Rice ecosystems; Culicidae; Malaria; Schistosomiasis; Japanese encephalitis.
Ano: 1988 URL: http://hdl.handle.net/123456789/897
Imagem não selecionada

Imprime registro no formato completo
Technique of pneumatic pest control – analyses and a new device Organic Eprints
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
Imagem não selecionada

Imprime registro no formato completo
FINANCIAL CONTROL WITHIN COMMERCIAL FAMILY FARMS AgEcon
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
Imagem não selecionada

Imprime registro no formato completo
PREDICTED FUTURE ECONOMIC IMPACTS OF BIOLOGICAL CONTROL OF LEAFY SPURGE IN THE UPPER MIDWEST AgEcon
Bangsund, Dean A.; Leistritz, F. Larry; Leitch, Jay A..
The Leafy Spurge Biological Control program was designed to use insects and plant diseases from the plant's original European habitat to control infestations in the United States. The widespread adoption of biological agents to combat leafy spurge and the initial success in reclaiming previously infested land has prompted an evaluation of the potential future economic benefits of the biological control of leafy spurge in the Upper Midwest. Based on expert opinion and historical data, leafy spurge in Montana, North Dakota, South Dakota, and Wyoming was projected to infest 1.85 million acres, of which, 65 percent was estimated to controlled with biological...
Tipo: Working or Discussion Paper Palavras-chave: Biological control; Leafy spurge; Economic impacts; Upper Midwest; Resource /Energy Economics and Policy.
Ano: 1997 URL: http://purl.umn.edu/23130
Imagem não selecionada

Imprime registro no formato completo
Economic Analysis of Johne's Disease Control Strategies in Dairy Herds AgEcon
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
Registros recuperados: 17.502
Primeira ... 123456789 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional