Search Results

1 - 10 of 64 items :

  • "field model" x
Clear All
Use of Triz SU-Field Models in the Process of Improving the Injector of an Internal Combustion Engine

fuel flow in the injector channels in the Common Rail systems. Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 17(89), pp. 80-86. Wiśnicki, B., Chybowski, L. and Czarnecki, M. (2017). Analysis of the efficiency of port container terminals with the use of the Data Envelopment Analysis method of relative productivity evaluation. Management Systems in Production Engineering, 1(25), pp. 9-15, doi: 10.1515/mspe- 2017-0001. Wu, C-T. (2011). Identifying an Innovative Su-Field

Open access
Sensitivity of Lageos Orbits to Global Gravity Field Models

. 287, no. 1, p. 279-289 Förste C., Schmidt R., Stubenvoll R., Flechtner F., Meyer U., König R., Neumayer H., Biancale R., Lemoine J.-M., Bruinsma S., Loyer S., Barthelmes F., and Esselborn S., (2008) satellite-only and combined gravity field models: EIGEN-GL04S1 and EIGEN-GL04C J. Geod. 82, 6, 331-346, doi:10.1007/s00190-007-0183-8 Goiginger H., Hoeck E., Rieser D., Mayer-Gürr T., Maier A., Krauss S., Pail R., Fecher T., Gruber T., Brockmann J. M., Krasbutter I., Schuh W.-D., Jäggi A., Prange L., Hausleitner W

Open access
Evaluation of recent Earth’s global gravity field models with terrestrial gravity data

D., Popescu A., 2003: GOCE: ESA’s first Earth Explorer Core Mission, in G. B. Beutler, M. R. Drinkwater, R. Rummel, and R. von Steiger (eds.), Earth Gravity Field from Space – from Sensors to Earth Sciences, Space Sciences Series of ISSI, 18 , 419–433. Förste C., Bruinsma S., Abrykosov O., Flechtner F., Dahle C., Neumayer K.-H., Barthelmes F., König R., Marty J.-C., Lemoine J.-M., Biancale R., 2013: EIGEN-6C3stat – The newest high resolution global combined gravity field model based on the 4th release of the GOCE Direct Approach, presented at IAG Scientific

Open access
Authenticity and Analytic Style

Abstract

The question that has prompted this article could be formulated as follows: what are the vicissitudes of the analyst’s subjectivity in the bi-personal models and, more specifically, in the Bion field model? Using a clinical vignette, the author shows his own “toy box” mainly the way he uses reverie and the interplay between plot and characters in the session.

Open access
Current State of Art of Satellite Altimetry

Engineers Conference and Exhibition 2014: Experience the Energy — Incorporating SPE EUROPEC, 2014, pp. 3049–3053. [6] Andersen O. B., Knudsen P., The role of satellite altimetry in gravity field modelling in coastal areas, ‘Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy’, 2000, Vol. 25, Issue 1, pp. 17–24. [7] Bosch W., Dettmering D., Schwatke C., Multi-mission cross-calibration of satellite altimeters: constructinga long-term data record for global and regional sea level change studies, ‘Remote Sensing’, 2014, Vol. 6, pp. 2255

Open access
Thermal conditions for geothermal energy exploitation in the Transcarpathian depression and surrounding units

Abstract

The contribution presents the results acquired both by direct cognitive geothermic methods and by modelling approaches of the lithosphere thermal state in the region of the Transcarpathian depression and surrounding units. The activities were aimed at the determination of the temperature field distribution and heat flow density distribution in the upper parts of the Earth’s crust within the studied area. Primary new terrestrial heat flow density map was constructed from values determined for boreholes, from their interpretations and from newest outcomes of geothermal modelling methods based on steady-state and transient approaches, and also from other recently gained geophysical and geological knowledge. Thereafter we constructed the maps of temperature field distribution for selected depth levels of up to 5000 m below the surface. For the construction we have used measured borehole temperature data, the interpolation and extrapolation methods, and the modelling results of the refraction effects and of the influences of source type anomalies. New maps and other geothermic data served for the determination of depths with rock temperatures suitable for energy utilization namely production of electric energy minimally by the binary cycles. Consequently the thermal conditions were used to identify the most perspective areas for geothermal energy exploitation in the region under study.

Open access
Disturbing potential and its geometrical properties

. - Moritz, H. (2005) Physical Geodesy. Springer, Vienna, New York. Janák, J. - Šprlák, M. (2006) Nový počítačový program na modelovanie tiažového poľa pomocou sférických harmonických funkcií. (A new software for gravity field modelling using spherical harmonics). Geodetický a kartografický obzor, 52/94, 1/06, pp. 1-8. Pavlis, N. K. - Holmes, S. A. - Kenyon, S. C. - Factor, J. K. (2008) An earth gravitational model to degree 2160 EGM2008. Geophysical Research Abstracts EGU 2008. Vaníček, P

Open access
Rosborough Formulation in Satellite Gravity Gradiometry

.C., Factor, J.K., Trimmer, R.G., Pavlis, N.K., Chinn, D.S., Cox, C.M., Klosko, S.M., Luthcke, S.B., Torrence, M.H., others, (1998) The Development of the Joint NASA GSFC and the National Imagery and Mapping Agency(NIMA) Geopotential Model EGM 96. NASA. Pail, R., Goiginger, H., Mayrhofer, R., Schuh, W.D., Brockmann, J.M., Krasbutter, I., Höck, E., Fecher, T., (2010) GOCE gravity field model derived from orbit and gradiometry data applying the time-wise method, in: Proceedings of the ESA Living Planet Symposium, ESA Publication SP-686, ESA/ESTEC, ISBN (Online

Open access
Fourier decomposition of segmented magnets with radial magnetization in surface-mounted PM machines

Abstract

This paper presents a generic field model of radial magnetization (RM) pattern produced by multiple segmented magnets per rotor pole in surface-mounted permanent magnet (PM) machines. The magnetization vectors from either odd- or even-number of magnet blocks per pole are described. Fourier decomposition is first employed to derive the field model, and later integrated with the exact 2D analytical subdomain method to predict the magnetic field distributions and other motor global quantities. For the assessment purpose, a 12-slot/8-pole surface-mounted PM motor with two segmented magnets per pole is investigated by using the proposed field model. The electromagnetic performances of the PM machines are intensively predicted by the proposed magnet field model which include the magnetic field distributions, airgap flux density, phase back-EMF, cogging torque, and output torque during either open-circuit or on-load operating conditions. The analytical results are evaluated and compared with those obtained from both 2D and 3D finite element analyses (FEA) where an excellent agreement has been achieved.

Open access
Determination and analysis of synchronous motor's parameters

Determination and analysis of synchronous motor's parameters

In this work the parameters of synchronous machines are analyzed- direct-axis reaction Xad and quadrature-axis reaction Xaq. Methods of calculation in view of magnetic system's and its element's saturation are presented.

It is shown that definition of these reactances, using as a basis a two-reaction method, is not correct and connected with work demanding chart analyzing calculations.

The new approach to the qualitative and quantitative analysis of synchronous machine's operating modes which is based on consecutive use of the magnetic field's theory is offered, without it with two-reaction parameters Xad and Xaq. This approach is realized by means of a magnetic field's modeling using numerical methods with help of modern computers.

Open access