The balance beam as a device to assist in the instruction of automatic control courses is described. The system consists of two water tanks placed on the ends of a balance beam. The control objective is to move the beam to a given reference angle. The control action is provided by a ...
These models and how they work are exemplified in the context of a well-known Piagetian developmental task and school science activity: balance beam ... WM Roth - 《Journal of Research in Science Teaching》 被引量: 59发表: 2000年 Group collaboration effects and the explicitness of children's...
A mathematical model of heat transfer in a directly-fired rotary kiln is developed and used to examine the effects of operating and design parameters on burden temperature. The model includes a mean beam length radiation model and axial ... G Silcox,D Perching - 《Journal of the Air & Wast...
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aAccording to the structural characteristics of the tower crane, beam elements are available in ANSYS to simulate the metal structure. In order to ensure the rapid analysis and accurate results, the following principles should be paid attention to when the dynamic analysis model of the tower crane...
Crystal-chemical controls on partition coefficients are described with the lattice strain model (Brice 1975; Blundy and Wood 1994). The partitioning of an element i with an ionic radius ri into the crystallographic site with an effective radius r0 can be described if we know the strain-free par...
Bearing in mind the energy balance, the flexoelectric effect is partially competitive to strain gradient effect. Fig. 4 The influence of flexoelectric coefficient \(f\) on the dispersion curves and the band gaps in the flexoelectric and gradient model \((l=4 \times {10^{ - 5}},{l_1}=...
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