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 111 for “"header"”.
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Automatic semantic header generator
… to extract information effectively. The Semantic Header, which is proposed by Desai (11), contains the semantic contents of information resources. It provides a useful tool in searching for a document based on a number of commonly used criteria. The information from the semantic header could be …
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Optical wireless communication systems employing dual header pulse interval modulation (DH-PIM)
… presented. A new modulation scheme called dual header pulse interval modulation (DH-PTh1) is presented. A comprehensive theoretical analysis supported by computer simulations has been carried out to study characteristics of DH-PTh1. Novel expressions for the DH-PTh1 pulse train, symbol length, …
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Modeling of the hydrodynamics within the header of a tubular membrane module.
… to the accumulation of pulp fibers within the header. In the present study, the commercial computational fluid dynamics package, CFD-ACE+ was used to simulate the hydrodynamics within the header of a simplified system. The hydrodynamics were simplified by approximating the two-phase pulp …
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The effect of manufacturing tolerances and header design on heat exchanger effectiveness
… the effect of manufacturing defects and inlet header design on the effectiveness of heat exchangers. A commercial computational fluid dynamics code, FLUENT 5.4, was used to numerically simulate individual and pairs of passages as well as sections of an inlet header and heat-exchanger core. The …
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The analysis and implementation of generic MPEG header and transport layer decoders
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Experimental study and modeling of liquid-vapor flow in the second header of microchannel condensers with separation circuitry
… separates from vapor inside the vertical second header (manifold tube with a plural of parallel microchannel-tube branches) mainly based on gravity. The liquid goes down to the lower, smaller passes downstream, while the vapor goes up into the upper, larger passes. This gravity-aided design only …
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Design and analysis of high-speed optical correlators for multiwavelength optical header recognition and optical code division multiple access
… optical networks because they enable the headers of high-speed optical packets to be processed and recognised "on-the-fly", thus, switching the packets to different destinations without the need for optical-to-electrical and electrical-to-optical conversions. In the first part of the …
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Refrigerant flow distribution in vertical headers of reversible microchannel heat exchangers
… heat exchanger, typically having vertical headers and more than two passes, may be used in either air-conditioning or heat pump mode in a reversible system. In heat pump mode, it functions as an evaporator and refrigerant maldistribution among parallel microchannel tubes creates unwanted …
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An economic justification of using a small turbine rather than pressure reducing valves between the high pressure header and high pressure heating lines of V.P.I. Power Plant
Generally it is believed that in a power station when there is a demand for process steam and also demand for heating, most of the auxiliaries of the plant should be arranged to be driven by steam rather than using electrical energy for them. This is, however, a general remark and a correct …
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Optimum parameter machine learning classification and prediction of Internet of Things (IoT) malwares using static malware analysis techniques
… on three different datasets containing file header, program header and section headers as features. Preliminary results show the accuracy of over 90% on file header, program header, and section headers. The scope of this document just discusses these results as initial results and still …
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Separation of liquid-vapor two-phase flow in headers of microchannel condensers
… of separation of vapor and liquid in a vertical header of MCHX with flow visualization is conducted to study the separation mechanisms. The first part of the chapters evaluates the concept of separation of vapor and liquid in condenser as a way to improve efficiency. An experimentally validated …
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Steam temperature and flow maldistribution in superheater headers
Heat exchangers and steam headers are at the heart of any boiler and are susceptible to a range of failures including tube leaks, ligament cracking, creep and fatigue. These common forms of header failure mechanisms can be exacerbated by local thermal stresses due to temperature and flow …
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Investigating the Performance of Wood Portal Frames as Alternative Bracing Systems in Light-Frame Wood Buildings
… by replacing the Spruce-Pine Fir (SPF), header with the Laminated Veneer Lumber (LVL) header. The addition of the FRP to the standard wall configuration also resulted in a significant increase in the moment capacity. However, no significant effect was observed on the stiffness properties …
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Web based CINDI system
… is described using a metadata called a Semantic Header, which is stored in a distributed databases management system; it is distributed for reliability and availability. The Semantic-Header is replicated at different nodes of the Internet. The locations of such nodes are stored in a database …
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Minimizing Multi-Hop Wireless Routing State under Application-Based Accuracy Constraints
… we investigate the tradeoff between the packet header size and the network state. We, then, apply our framework to the case of TBR with application-based accuracy constraints in obeying a given trajectory. We begin with simple discrete models to clarify the tradeoff between packet header size …
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CINDI : the virtual library graphical user interface
… a standard index scheme called Semantic-Header and informative query interface for users and providers of resources published on the Internet. This thesis presents the architectural design of the CINDI system, the design and implementation of the client part of the expert system, and the …
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Flow distribution in brazed plate heat exchangers
… due to the sudden expansion flow in the inlet header. For the rest channels, the flow rate decreases with the distance away from the entrance/exit of the heat exchanger. Such a distribution profile is associated with the axial momentum transfer in the inlet header. The influence of the total …
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Experimental Investigations of Internal Air-water Flows
… flows, with a focus on conditions occurring in header-feeder systems of nuclear reactors under different accident scenarios. Novel experimental techniques have been proposed for the identification of the flow regime and measurement of the flow rates of both phases in gas-liquid flows. These …
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