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A computer-aided calibration method for hot film probes is presented which tolerates statistical and some systematic errors, and which allows data evaluation in real-time. Essentially, the velocity is approximated by a power series at each yaw angle and for each sensor. A weighting function minimizes the influences of errors. At measurement time the anemometer voltages are roughly linearized. The digitized voltages are subjected to a combination of iteration and interpolation in order to compute the velocity components. RMS-values of the two velocity components parallel to the wall, u and w, and of their partial derivatives with respect to time in a turbulent wall boundary layer are shown and will be used for comparison. 相似文献
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Lars Schewe 《Discrete and Computational Geometry》2010,43(2):289-302
We show that no minimal vertex triangulation of a closed, connected, orientable 2-manifold of genus 6 admits a polyhedral
embedding in ℝ3. We also provide examples of minimal vertex triangulations of closed, connected, orientable 2-manifolds of genus 5 that do
not admit any polyhedral embeddings. Correcting a previous error in the literature, we construct the first infinite family
of such nonrealizable triangulations of surfaces. These results were achieved by transforming the problem of finding suitable
oriented matroids into a satisfiability problem. This method can be applied to other geometric realizability problems, e.g.,
for face lattices of polytopes. 相似文献
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D. W. Scheuch U. Schaper W. Förster H. Kühn T. Schewe 《Fresenius' Journal of Analytical Chemistry》1986,324(3-4):368-369
Conclusions The data presented in this paper together with the findings of Hagmann et al. [4] suggest an important role of metabolites of the lipoxygenase pathway in the pathogenesis of endotoxin shock. Selective inhibition of lipoxygenase by FLM 5011 prevented the development of irreversible shock state nearly completely decreasing the mortality rate to 0.05. p ]Further investigations on the precise mechanism of the action of lipoxygenase metabolites are necessary to evaluate their actual significance in the complex pathogenesis of circulatory shock.
Hemmung des Lipoxygenase-Weges erhöht die Überlebensrate im Endotoxin-Schock相似文献
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We show that topological (n4) point–line configurations exist for all n≥17. It has been proved earlier that they do not exist for n≤16. 相似文献
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H. Hoffmann M. Neudel H. Schewe J. Reffle 《Applied Physics A: Materials Science & Processing》1981,24(3):229-232
The trajectories of para-and ferromagnetic particles with velocities between 0.04 and 2.5 cm s−1 have been investigated in an HGMS model system with axial configuration. A single-wire system has been observed by a TV system.
The trajectories were compared with the ideal (inviscid flow) and laminar (viscous flow) model. The results agree with laminar
flow model. 相似文献
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