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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
351

Physical tests for timeloops

Massopust, Peter Robert 05 1900 (has links)
No description available.
352

Dissipative sets and semigroups in Hilbert spaces

Sullivan, Joe Wheeler 12 1900 (has links)
No description available.
353

The effects of spatial arrangement on group formation, productivity, and satisfaction

Smith, Craig W. 05 1900 (has links)
No description available.
354

Applications of reproducing kernels in Hilbert spaces

Mumford, Michael Leslie 05 1900 (has links)
No description available.
355

Spacetime as a quantum graph

Gibbs, James Michael 12 1900 (has links)
No description available.
356

Wind Speed Forecasting for Power System Operation

Zhu, Xinxin 16 December 2013 (has links)
In order to support large-scale integration of wind power into current electric energy system, accurate wind speed forecasting is essential, because the high variation and limited predictability of wind pose profound challenges to the power system operation in terms of the efficiency of the system. The goal of this dissertation is to develop advanced statistical wind speed predictive models to reduce the uncertainties in wind, especially the short-term future wind speed. Moreover, a criterion is proposed to evaluate the performance of models. Cost reduction in power system operation, as proposed, is more realistic than prevalent criteria, such as, root mean square error (RMSE) and absolute mean error (MAE). Two advanced space-time statistical models are introduced for short-term wind speed forecasting. One is a modified regime-switching, space-time wind speed fore- casting model, which allows the forecast regimes to vary according to the dominant wind direction and seasons. Thus, it avoids a subjective choice of regimes. The other one is a novel model that incorporates a new variable, geostrophic wind, which has strong influence on the surface wind, into one of the advanced space-time statistical forecasting models. This model is motivated by the lack of improvement in forecast accuracy when using air pressure and temperature directly. Using geostrophic wind in the model is not only critical, it also has a meaningful geophysical interpretation. The importance of model evaluation is emphasized in the dissertation as well. Rather than using RMSE or MAE, the performance of both wind forecasting models mentioned above are assessed by economic benefits with real wind farm data from Pacific Northwest of the U.S and West Texas. Wind forecasts are incorporated into power system economic dispatch models, and the power system operation cost is used as a loss measure for the performance of the forecasting models. From another perspective, the new criterion leads to cost-effective scheduling of system-wide wind generation with potential economic benefits arising from the system-wide generation of cost savings and ancillary services cost savings. As an illustration, the integrated forecasts and economic dispatch framework are applied to the Electric Reliability Council of Texas (ERCOT) equivalent 24- bus system. Compared with persistence and autoregressive models, the first model suggests that cost savings from integration of wind power could be on the scale of tens of millions of dollars. For the second model, numerical simulations suggest that the overall generation cost can be reduced by up to 6.6% using look-ahead dispatch coupled with spatio-temporal wind forecast as compared with dispatch with persistent wind forecast model.
357

On the Oscillations of Jupiter as Observed by Voyager 2

Burr, Wesley 18 December 2007 (has links)
Data recorded from Voyager 2 in 1979 during closest approach to Jupiter is prepared and analyzed for evidence of Jovian modal forcing. Comparisons are drawn between the data set in question and previously performed analysis by Mosser et al. [27], [29], [6] and also to the models presented by Gudkova and Zharkov in [19]. The theory of stationary processes and multitaper spectrum estimation are em- ployed extensively in the analysis, along with intensive use of the harmonic frequency variance test as a tool for separating signal from noise. The splitting of low-order p-modes is briefly examined and found to be in-line with that discovered earlier by Mosser et al.. / Thesis (Master, Mathematics & Statistics) -- Queen's University, 2007-12-12 20:16:46.187
358

Property rights in airspace, (landowners and the right of flight).

Abramovitch, Yehuda. January 1962 (has links)
In the vast expanse of the law, there is probably no branch or division which can trace its history farther back, or which is more important to the general public, including as it does innumerable elements of everyday life, than that branch of law dealing with Private Property. The term ‘Property’ has a bewildering variety of uses. However, basically it is used in two senses: that of ownership or title, and also to designate the ‘res’ over which ownership is or has been exercised. This one word is used to express both the genus and the species. The relationship between the individual and the ‘res’ which is his own property is known as the rights of ownership.
359

Air law in Latin America.

Tolle, Paulo. E. January 1960 (has links)
The efforts towards the international unification of air law have been carried on since the Age of Aviation began. In 1911, the Comité Juridique International d'Aviation presented the first suggestion of a uniform law, the Code International de l'Air. International conferences and conventions have contributed to the partial unification of some rules in international air navigation. Many writers in this field have emphasized the convenience of a broader unity.
360

Venezuela's Bilateral Air Transport Agreements and Problems of Interpretation in the Jet Era.

Barrett, Donald M. January 1961 (has links)
Aviation is dynamic. In air transportation progress constantly outstrips the most optimistic predictions, and the great post-World-War II advances in the aeronautical sciences have produced a new dimension in air transportation: the commercial turbo-jet aircraft. In referring to these new aircraft, one writer states, "It is not adequate to simply say that they are just a faster, bigger aircraft. [...]

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