Results 221 to 230 of about 150,245 (261)
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The precision of proprioceptive position sense
Experimental Brain Research, 1998The purpose of this study was to determine the precision of proprioceptive localization of the hand in humans. We derived spatial probability distributions which describe the precision of localization on the basis of three different sources of information: proprioceptive information about the left hand, proprioceptive information about the right hand ...
van Beers, R.J. +2 more
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Fastening and Assembly Solutions and Technology, 2023
IKO’s positioning tables provide highly precise movement and positioning control. There is something for everyone in IKO’s positioning table range
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IKO’s positioning tables provide highly precise movement and positioning control. There is something for everyone in IKO’s positioning table range
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Efficient Multiple-Precision Posit Multiplier
2021 IEEE International Symposium on Circuits and Systems (ISCAS), 2021Posit number system has been recently widely applied in many fields of applications. For different applications, the precision requirements are usually different. In addition, the transprecision computing paradigm, which is proposed for energy efficient computation, even requires different precision in each computation step.
Hao Zhang 0041, Seok-Bum Ko
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
Abstract This paper describes a series of positioning devices driven by piezoelectric transducers that have been developed and are intended to be used for the precise orientation of light-weight objects, in particular of specimens during physical investigations, movable elements in spectrometers, and for the precise focusing of laser beams, etc.
A.N. Artemiev +4 more
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Abstract This paper describes a series of positioning devices driven by piezoelectric transducers that have been developed and are intended to be used for the precise orientation of light-weight objects, in particular of specimens during physical investigations, movable elements in spectrometers, and for the precise focusing of laser beams, etc.
A.N. Artemiev +4 more
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Active Thermal Management for Precision Positioning
2007 IEEE International Conference on Automation Science and Engineering, 2007Precision positioning systems are inevitably subject to various thermal disturbances including heating from motors, friction between components, and ambient temperature fluctuations. Thermal disturbances cause unwanted thermal expansion and contraction; the resulting distortion of the components in the positioning system could lead to degraded ...
Rongliang Zhou +6 more
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Precise positioning of patients for radiation therapy
International Journal of Radiation Oncology*Biology*Physics, 1982We have developed a number of immobilization schemes which permit precise daily positioning of patients for radiation therapy. Pretreatment and post-treatment radiographs have been taken with the patient in the treatment position and analyzed to determine the amount of intratreatment movement.
L J, Verhey +4 more
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Control methodologies for precision positioning systems
2013 American Control Conference, 2013We have many servo systems that require nano/micro level positioning accuracy. This requirement sets a number of interesting challenges from the viewpoint of sensing, actuation, and control algorithms. This paper considers the control aspect for precision positioning.
Xu Chen 0001, Masayoshi Tomizuka
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2017
Since its introduction in 1997, precise point positioning (PPP ) offers an attractive alternative to differential global navigation satellite system (GNSS ) positioning. The PPP approach uses undifferenced, dual-frequency, pseudorange and carrier-phase observations along with precise satellite orbit and clock products, for standalone static or ...
Jan Kouba +2 more
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Since its introduction in 1997, precise point positioning (PPP ) offers an attractive alternative to differential global navigation satellite system (GNSS ) positioning. The PPP approach uses undifferenced, dual-frequency, pseudorange and carrier-phase observations along with precise satellite orbit and clock products, for standalone static or ...
Jan Kouba +2 more
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A Complex Number Approach for Absolute Precision Position Synthesis for Three Precision Positions
22nd Biennial Mechanisms Conference: Mechanism Design and Synthesis, 1992Abstract Dyads can be synthesized by prescribing the precision point coordinates and the absolute planar orientations of one dyad vector at each of three precision positions. This differs from traditional complex number methods wherein the vector orientations are described relative to one another.
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Precise positioning with the GPS
2005A review of current measurement reduction techniques for precise positioning using carrier phase observables from the Global Positioning System satellites is presented. The qualities of each are discussed. The main cause of data problems, cycle slips, is also given along with an example, and then a possible algorithm to correct slips over short time ...
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