Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1704 for “"directional"”.
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Nonparametric directional perception
… of the Manhattan Frame and the unconstrained directional segmentation. These capture, in the space of surface normals, scenes composed of multiple Manhattan Worlds and more general Stata Center Worlds, in which the orthogonality assumption of the Manhattan World is not applicable. This …
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Coexistence of directional and non-directional technologies in 6G wireless dense networks
… dissertation we consider dense deployment of directional visible light APs. Firstly, we analyze the performance of a visible light communication (VLC) link and propose algorithmic methods as well as novel receiver structures to enhance its quality. Secondly, we study handover algorithms and …
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Directional solvent extraction desalination
… membrane-free desalination technology using directional solvents capable of extracting pure water from a contaminated solution without themselves dissolving in the recovered water. This method dissolves the water into a directional solvent by increasing its temperature, rejects salts and …
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Beta-Gamma Directional Correlation Measurements
… to a fixed beta detector is described by the directional correlation function, W(theta). Theoretical predictions for W(theta) have been worked out for most cases of interest. In an actual experimental situation (Figure 1), the beta - gamma coincidence counting rate, C(theta), is measured as a …
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Nonparametric Modelling for Directional Data
In directional statistics, observations are directions or orientations. The three main types of directional data considered are circular, spherical and toroidal data, with corresponding support space on a circle, a hyper-sphere, and a torus, respectively. As conventional statistical tools and …
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Some Antecedents of Directional Fractionation
Made available in DSpace on 2014-12-08T23:02:23Z (GMT). No. of bitstreams: 1 7105049.pdf: 6437824 bytes, checksum: ce1ad1ecc10472adbfb2a6d0dc755391 (MD5) Previous issue date: 1970
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Directional impedance of geared transmissions
… for geared actuation systems that experience bidirectional exchange of energy with the environment. Despite the asymmetry of efficiency depending on the direction of power transfer in geared systems, typical dynamic models consider a fixed transmission efficiency for all conditions which can …
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Directional Airflow for HVAC Systems
Directional airflow has been utilized to enable targeted air conditioning in cars and airplanes for many years, where the occupants could adjust the direction of flow. In the building sector however, HVAC systems are usually equipped with stationary diffusors that can only supply the air either in …
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A two-directional target optimization model.
… of aircraft from each direction, and a three-directional attack. An example problem is solved using the basic model. A Fortran IV computer program is included. Computation time versus problem characteristics is discussed.
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Directional UAV swarming: a network perspective
… smart antennas with USRP-RIO. We tested the directionality of the antenna, implemented a full-duplex transmission system and a relay system. Furthermore, CPT and CPR which are the two important signature features of MBSA are realized by USRP.
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Studying Regime Change using Directional Change
… change detection using indicators developed in Directional Change (DC). DC is an alternative way to sample financial data. Unlike time series, which samples transaction prices at regular time intervals, DC samples prices at peaks and troughs of the market. We propose a new method to detect …
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Directional Uniform Rotundity in Banach Spaces
Made available in DSpace on 2014-12-14T13:09:28Z (GMT). No. of bitstreams: 1 7606967.pdf: 2506849 bytes, checksum: 0bc89a7a372928c1aedb5f6be2b5a835 (MD5) Previous issue date: 1975
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Directional image representations using nonseparable lifting
… This thesis demonstrates a method to create a directional image representation with compact spatial support which is not limited to a single dimension. Within the lifting framework of perfect reconstruction filter banks, sparse representation requires prediction filters able to adapt to the …
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Investigating multi-directional inhomogeneous granular suspensions
Granular flows in rotating drums find many applications in industry, even though the dynamics of their granular media is not fully understood. Several models of granular flow and granular suspensions (where a viscous fluid is present in the voids between the granular particles) have been proposed …
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Modeling transport processes in directional solidification.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Directional growth of wind generated waves
… numerical wave prediction model which calculates directional wave spectra from input wind fields. As do the majority of wave models, it uses a point spectral growth mechanism, i.e., it applies the energy balance equation in a directionally integrated form. The directionality of its growth is …
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Directional wavenumber characteristics of short sea waves
… that there are so few measurements of short wave directional spectra, however l these results should be considered preliminary in the field and more extensive measurements are required to fully understand the angular distribution of short wave energy and the parameters upon which it depends.
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Asynchronous bi-directional relay-assisted communication networks
We consider an asynchronous bi-directional relay network, consisting of two singleantenna transceivers and multiple single-antenna relays, where the transceiver-relay paths are subject to different relaying and/or propagation delays. Such a network can be viewed as a multipath channel which can …
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Miniaturized, Directional Antennas For Wireless Power Transfer
<p>Today’s age of ever advancing wireless technologies and compact mobile devices has given us the ability to stay connected in all but the remotest places on earth. However, one limiting factor to new wireless technologies has always been the battery. In this thesis the prospect of wireless power …
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