Y2002-63520-549 03242061维热生产处理的致动器导航方法的试验验证=Ex-perimental verification of an actuator guidance scheme fora 1-D thermal manufacturing processing[会,英]/Paskaleva,A.& Vayena,O.//Proceedings of the...
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Y2002-63520-549 03242061维热生产处理的致动器导航方法的试验验证=Ex-perimental verification of an actuator guidance scheme fora 1-D thermal manufacturing processing[会,英]/Paskaleva,A.& Vayena,O.//Proceedings of the 40thIEEE Conference on Decision and ***.1 of5.—549～554(HE)Y2002-63523-3178 0324207为系统和控制的最佳化应用“Surro gates”降低时间消耗=Using surrog gates to reduce time expenditure foroptimization in systems and control[会,英]/Pietrobom,
In response to the Food and Drug Administration's (FDA's) Draft guidance for Industry: Metered Dose Inhaler (MDI) and Dry Powder Inhaler (DPI) Drug Products Chemistry, Manufacturing, and Controls (CMC) Documen...
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In response to the Food and Drug Administration's (FDA's) Draft guidance for Industry: Metered Dose Inhaler (MDI) and Dry Powder Inhaler (DPI) Drug Products Chemistry, Manufacturing, and Controls (CMC) Documentation (1), a technical team initiated a scientific evaluation of the tests and methods for MDIs required by that guidance. This technical team was comprised of members of the Inhalation Technology Focus Group (ITFG) of the American Association of Pharmaceutical Scientists and the International Pharmaceutical Aerosol Consortium on Regulation and Science (IPAC-RS). It was called the ITFG/IPAC-RS Tests and Methods Technical Team. The team believes that only those tests that have been demonstrated in development studies to provide meaningful information about quality should be included as product quality control tests. The team analyzed the tests required by the draft guidance from this perspective. This article summarizes the results of the teams investigation and provides a critical assessment of how individual tests can add value to the development and quality control of a new product. The goal of the team initiative is to maximize the value of characterization and control testing, and to minimize testing that does not provide useful information.
This article provides a brief overview of research efforts over the past 50 years directed toward the development of guidance systems for agricultural vehicles. The motivations for and potential advantages of autonomo...
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This article provides a brief overview of research efforts over the past 50 years directed toward the development of guidance systems for agricultural vehicles. The motivations for and potential advantages of autonomous or semi-autonomous systems are discussed. Examples are presented of the two general approaches taken;namely, guidance with respect to a directrix generated by the previous pass, or guidance with respect to a directrix generated by fixed points in the field. From this review, it is concluded that two recent technologies, specifically computer vision and the global positioning system, possess the technological features and characteristics most closely resembling those possessed by the human operator for implementation of a vehicle guidance system. (C) 2000 Elsevier Science B.V. All rights reserved.
We have designed, built, and flight-tested a new star camera for daytime guiding of pointed balloon-borne experiments at altitudes around 40 km. The camera and lens are commercially available, off-the-shelf components...
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We have designed, built, and flight-tested a new star camera for daytime guiding of pointed balloon-borne experiments at altitudes around 40 km. The camera and lens are commercially available, off-the-shelf components, but require a custom-built baffle to reduce stray light, especially near the sunlit limb of the balloon. This new camera, which operates in the 600- to 1000-nm region of the spectrum, successfully provides daytime aspect information of similar to10 arcsec resolution for two distinct star fields near the galactic plane. The detected scattered-light backgrounds show good agreement with the Air Force MODTRAN models used to design the camera, but the daytime stellar magnitude limit was lower than expected due to longitudinal chromatic aberration in the lens. Replacing the commercial lens with a custom-built lens should allow the system to track stars in any arbitrary area of the sky during the daytime. (C) 2002 Society of Photo-Optical Instrumentation Engineers.
This paper describes the formulation and numerical investigation of a variable load factor guidance algorithm (variable n-guidance) that allows an aircraft pilot to approximate minimum-time low-altitude quasi-level fl...
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This paper describes the formulation and numerical investigation of a variable load factor guidance algorithm (variable n-guidance) that allows an aircraft pilot to approximate minimum-time low-altitude quasi-level fly-to-point maneuvers of a jet fighter aircraft. The maneuvers studied consist of flight to a point at a radial distance of 50 kft from the starting point, with the final position vector oriented at 45, 90, 135, 180 deg from the initial course and with the requirement that the initial and final altitudes be the same. First, the fly-to-point maneuver is optimized from the time viewpoint with respect to three controls (angle of attack, power setting, angle of bank) via the sequential gradient-restoration algorithm. Then, from the study of the optimal trajectories, a variable n-guidance algorithm is developed, connecting the load factor to the turn-to-go. This algorithm is implemented via feedback control and tested. For comparison purposes, a constant n-guidance scheme is also tested. The main conclusion is that the variable n-guidance algorithm produces trajectories that approximate closely the optimal trajectories. On the other hand, the constant n-guidance scheme does not approximate well the optimal trajectories.
The Object Oriented Control Architecture for Autonomy (O-2 CA(2)) is a control architecture being developed at the University of Girona. Conceived as a hybrid, it is organised in three layers (deliberative, control ex...
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The Object Oriented Control Architecture for Autonomy (O-2 CA(2)) is a control architecture being developed at the University of Girona. Conceived as a hybrid, it is organised in three layers (deliberative, control execution and reactive) merging the deliberation mechanisms of planning with reactive behaviours in charge of controlling the robot in real-time. The aim of this paper is to provide an overall description of the whole architecture and an in-depth description of the reactive layer. The concepts of the architecture were firstly tested through the simulation of a simple mission consisting of navigating through a sequence of way-points while avoiding contact with obstacles. Apart from that, further testing has been carried out using the GARBI ROV as an experimental platform. The principal object is to increase the capabilities of GARBI in order to transform it into an AUV. (C) 2002 Elsevier Science Ltd. All rights reserved.
This paper describes an. eye-control method based on electrooculography (EOG) to develop a system for assisted mobility. One of its most important features is its modularity, making it adaptable to the particular need...
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This paper describes an. eye-control method based on electrooculography (EOG) to develop a system for assisted mobility. One of its most important features is its modularity, making it adaptable to the particular needs of each user according to the type and degree of handicap involved. An eye model based on electrooculographic signal is proposed and its validity is studied. Several human-machine interfaces (HMI) based on EOG are commented, focusing our study on guiding and controlling a wheelchair for disabled people, where the control is actually effected by eye movements with-in the socket. Different techniques and guidance strategies are then shown with comments on the advantages and disadvantages of each, one. The system consists of a standard electric wheelchair with an on-board computer, sensors and a graphic user interface run by the computer. On the other hand, this eye-control method can be applied to handle graphical interfaces, where the eye is used as a mouse computer. Results obtained show that this control technique could be useful in multiple applications, such-as mobility and communication aid for handicapped persons.
Heat treating is a dangerous occupation. Furnaces are inevitably hot and the treatment atmospheres comprise a wide range of potentially dangerous gases. This article outlines the potential hazards associated with the ...
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Heat treating is a dangerous occupation. Furnaces are inevitably hot and the treatment atmospheres comprise a wide range of potentially dangerous gases. This article outlines the potential hazards associated with the use of furnaces, particularly when atmospheres are employed that have risks of explosions, burning, toxic effects and asphyxiation. It suggests ways in which those risks can be minimised and reviews the guidance provided by some relevant safety standards.
The dynamic mechanisms by which self-organizing circuits form in a developing nervous system remain to be elucidated. It is clear, however, that diffusible chemoattractants and chemorepelants as well as contact attrac...
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The dynamic mechanisms by which self-organizing circuits form in a developing nervous system remain to be elucidated. It is clear, however, that diffusible chemoattractants and chemorepelants as well as contact attraction and contact repulsion have been implicated in the establishment of connections between neurons and their targets, We will describe simulations based on the known biology of the whole sequence of events from the bundling of axons, guidance, pathfinding, to debundling and the final innervation of individual targets. (C) 2000 Elsevier Science B.V. All rights reserved.
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