Field Determination of Energy Flow in a Small Nocturnal Mammal

1976 ◽  
Vol 57 (1) ◽  
pp. 149-158 ◽  
Author(s):  
V. R. Collins ◽  
M. H. Smith
Keyword(s):  
Energy Flow ◽  
Nocturnal Mammal

Determination of optimal pacing strategy in track cycling with an energy flow model

1999 ◽  
Vol 2 (3) ◽  
pp. 266-277 ◽  
Author(s):  
Jos J. de Koning ◽  
Maarten F. Bobbert ◽  
Carl Foster
Keyword(s):  
Energy Flow ◽  
Flow Model ◽  
Pacing Strategy ◽  
Track Cycling

scholarly journals Analytical description of power losses in a transformer operating in the dual active bridge converter

2016 ◽  
Vol 64 (3) ◽  
pp. 561-574
Author(s):  
R. Barlik ◽  
M. Nowak ◽  
P. Grzejszczak ◽  
M. Zdanowski
Keyword(s):  
Distributed Generation ◽  
High Frequency ◽  
Energy Flow ◽  
Single Phase ◽  
Renewable Energy Sources ◽  
Analytical Description ◽  
Power Losses ◽  
Dual Active Bridge ◽  
High Frequency Transformer

Abstract The paper presents an analytical approach to the determination of power losses in a high-frequency transformer operating in the dual active bridge (DAB). This transformer, having two single-phase transistor bridge inverters, couples two DC circuits that significantly differ in voltages (280 V and 51 V ±20%). Power losses in the core and windings of the planar transformer 5600 VA /100 kHz were calculated taking into account changes in the value and direction of the energy flow between the coupled DC circuits. These circuits represent storage or renewable energy sources and intermediate circuits of the converters used in distributed generation systems. Calculations were performed using the Steinmetz’s and Dowell’s equations. The analytical results have been verified experimentally.

scholarly journals Bond Graph Modelling and Energy Flow Analysis of a Reach Stacker

2014 ◽  
Author(s):  
Thomas Schaep ◽  
Wilfrid Marquis-Favre ◽  
Eric Bideaux ◽  
Eric Noppe ◽  
Pierre Rodot ◽  
...  
Keyword(s):  
Energy Flow ◽  
Flow Analysis ◽  
Bond Graph ◽  
Power Train ◽  
Energy Flow Analysis ◽  
System A ◽  
Actuation System ◽  
Energy Transfers ◽  
Simulation Results

This study focuses on the global energy flow analysis along the three main energy lines of an off-highway vehicle used on port areas called a reach stacker. In order to characterize the energy consumption of the power train and the actuation system, a model of the machine has been established using the bond graph methodology. This language is suitable for representing multi domains energy transfers and allows the determination of the needed energy for an actuator to perform a given task. The simulation results are then compared with measurements carried out on a real reach stacker. Those data help to identify several parameters like friction coefficients and efficiencies. The energy flow analysis also gives detailed information on the main energy losses sources which prefigures coming evolutions.

scholarly journals Identification of the Technical Condition of Induction Motor Groups by the Total Energy Flow

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6677
Author(s):  
N. I. Koteleva ◽  
N. A. Korolev ◽  
Y. L. Zhukovskiy
Keyword(s):  
Induction Motor ◽  
Energy Flow ◽  
Classification Problem ◽  
Technical Condition ◽  
Power Bus ◽  
Linear Load ◽  
Non Linear Load ◽  
Motor Operation ◽  
Equal Power

The paper discusses the method of identifying the technical condition of induction motors by classifying the energy data coming from the main common power bus. The work shows the simulation results of induction motor operation. The correlation between occurring defects and current diagrams is presented. The developed simulation model is demonstrated. The general algorithm for conducting experiments is described. Five different experiments to develop an algorithm for the classification are conducted: determination of the motors number in operation with different power; determination of the motors number in operation with equal power; determination of the mode and load of induction electric motor; determination of the fault and its magnitude with regard to operation and load of induction motor; determination of the fault and its magnitude with regard to operation and load of induction motor with regard to non-linear load in the flow. The article also presents an algorithm for preprocessing data to solve the classification problem. In addition, the classification results are shown and recommendations for testing and using the classification algorithm on a real object are made.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

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