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 341 for “"Bi-Directional"”.
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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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Bi-Directional AC-DC Converters for Electric Vehicles
… for EV chargers in terms of weight, safety, reliability, cost and efficiency. Meeting power quality standards imposed by grid and operation with wide range of DC voltage and current are among the other requirements. In addition, EV battery chargers can be used for ancillary services and also feed …
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Bi-Directional Information Exchange with Computing Handheld Devices
The "Bi-Directional Information Exchange with Handheld Computing Devicesz' project introduces two new concepts: dynamic "digital receipts" and "personal data warehousing." Dynamic digital receipts means digitalizing paper transactions generated from points of sale. Personal data warehousing …
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Bi-directional evolutionary method for stiffness and displacement optimisation
… a method for structural optimisation called bi-directional evolutionary structural optimisation (BESO). It is an extension of the systematic research on the evolutionary method. The basic concept of evolutionary structural optimisation (ESO) is that by slowly removing the inefficient …
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The bi-directional relationship between gut microbiota and autoimmunity
… as a major reservoir for a vast number of microbiota. These microbes have evolved symbiotic relationships with humans due to their close proximity with their host. As a result, the immune system adapts to the microbiota thus modulating immunological function. Autoimmunity is a state in which …
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Bi-directional tumour-host interaction in a murine model
Tumours evoke immunologic responses yet they continue to grow and develop. The majority of people who develop tumours are immunocompetant, evoke immune responses and yet metastases occur in lymphnodes, potentially the most hostile immune environment. This is the paradox that we are attempting to …
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Bi-directional DC-DC converter for low power applications
… conventionally been implemented with two uni-directional converters; each processing the power in one direction. With growing emphasis on compact, smaller and efficient power systems there is increasing interest in the possibility of using bi-directional converters, especially in DC power …
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Single-Phase Bi-directional Ćuk Inverter for Battery Applications
Bidirectional inverters are widely applied in photovoltaic and wind systems that require battery power backup. They are advantageous over unidirectional inverters because of their ability to convert DC power into AC power and then AC power back into DC power to recharge for storage purposes. …
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Modeling and characterizing bi-directional airflow in natural ventilation
Bi-directional airflow in natural ventilation is an essential but not-well-understood scenario due to the complexity of airflow patterns as well as the strong coupling effect between temperature and ventilation. Neglecting bi-directional natural ventilation will result in problematic solutions and …
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Development of Bi-Directional Module using Wafer-Bonded Chips
Double-sided module exhibits electrical and thermal characteristics that are superior to wire-bonded counterpart. Such structure, however, induces more than twice the thermo-mechanical stress in a single-layer structure. Compressive posts have been developed and integrated into the double-sided …
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A comparison of bi-directional disc brake rotor passage designs
An important part of automobile safety is the braking system. Disc brakes have been widely used in automobiles for sped retardation for over 30 years. During that time, they have developed from a simple disc to a complex disc with channels, vanes, holes and grooves. The stopping capability of disc …
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A Dual-GFP Reporter System for Studying Bi-Directional Promotion
Bi-directional promotion has been reported in various species. Understanding transcriptional control at these various loci requires a tool which measures bi-directional transcription. Green Fluorescent Protein (GFP) reporters may be suitable for simultaneous measurement in a dualreporter system. …
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Attributes of Bi-Directional Turbomachinery for Pumped Thermal Energy Storage
… for determining the aerodynamic performance of bi-directional turbomachines for pumped thermal energy storage, i.e., turbomachines designed to operate with both forward and backward flow, (ii) carry out performance computations for such turbomachines, and (iii) propose principles for conceptual …
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Bi-directional Flyback Converter Circuit Design for Flapping-wing Microrobots
… have shown great interest in developing biologically inspired flapping-wing micro aerial robots that mimic the behavior of aerial insects. One of the major design challenges for sub-gram aerial robots is to achieve power autonomy. Over the past decade, numerous designs of sub-gram aerial …
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EMI Characterization and Improvement of Bi-Directional DC/DC Converters
… of high efficiency, high voltage ratio bi-directional DC/DC converter for fuel cell energy system management. In this paper, two bi-directional DC/DC converters, which are developed for Ford Motor Company’s fuel cell vehicle, are compared from different aspects. Comparison is …
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The Bi-directional Spatial Spectrum for MIMO Radar and Its Applications
… "after-the-fact" transmit beamforming. The ability to discriminate in both direction-of-arrival and direction-of-departure allows for the novel ability to discriminate line-of-sight returns from multipath returns. This works extends the concept of virtual non-causal transmit beamforming to …
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Isolated Bi-directional DC-DC Converter with Smooth Start-up Transition
The bi-directional dc/dc converter is a very popular and effective tool for alternative energy applications. One way it can be utilized is to charge and discharge batteries used in residential solar energy systems. In the day, excess power from the PV panels is used to charge the batteries. During …
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Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems
… issues related to the ac-dc bus-interface bi-directional converters in renewable energy systems. The dissertation explores a dc-electronic distribution system for residential and commercial applications with a focus on the design of an ac-dc bi-directional converter for such application. …
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A low ripple bi-directional battery charger/discharger using coupled inductor
… flowing through both battery and bus, and bi-directional power flow to and from the battery. This thesis introduces a novel low ripple current bi-directional battery charge/discharge converter using coupled-inductor. Bi-directional switch structures and proper control scheme make it …
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