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.
Results
Showing 1 to 20 of 25 for “"Performance of systems"”.
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High -Throughput Coherence Controllers
Applying a combination of the parallel mechanisms allows integrating four times as many processors per coherence controller. This reduces system cost, while maintaining or even exceeding the performance of systems with a larger number of coherence controllers.
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Multicarrier Wireless Systems with Adaptive Decision Combining
… Orthogonal Frequency Division Multiplexing (OFDM) systems with decision combining are considered in this thesis. It is shown that such systems can provide enhanced bit error rates. However, this occurs at the cost of data throughput of the system. The typical system considered essentially …
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Queueing models for call centres
… models that can be used to model characteristics of basic call centres, i.e. multi-server systems with time-dependent arrival rates, general service time distribution and state-dependent abandonments on arrival (balking). The discrete-time modelling approach which has previously been used for …
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Analysis and design of manufacturing systems with multiple-loop structures
… production system is one where the flow of material is controlled by the presence or absence of a kanban, and where kanbans travel in the system according to certain rules. The study of kanban-controlled production systems can be traced back to the Toyota Production System in the 1950s. …
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Performance guarantees for deadline-driven MapReduce jobs under failure
Restriction data tranferred 2014-07-01T11:36:32-05:00 Original Data Group with Access Administrator Release Date: 2015-08-22 11:57:26 UTC Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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Device-level composition in ReWire
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] ReWire provides engineers with a tool to specify, verify and implement hardware devices for FPGAs from a high-level Haskell-like language. Previous work has shown ReWire to be a productive source language for developing whole …
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Analysis of recursive cache-adaptive algorithms
The performance and behavior of caches is becoming increasingly important to the overall performance of systems. As a result, there has been extensive study of caching in theoretical computer science. The traditionally studied model was the external-memory model [AV88]. In this model cache misses …
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Dynamic Programming and Time-Varying Delay Systems
… part introduces some useful tools for analysis of stability and performance of systems with time-varying delays. The two papers presented in the first part attacks optimal control problems with finite but rapidly increasing search space. In the first paper we try it reduce the complexity of the …
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Distributed Vibration Sensing using Rayleigh Backscatter in Optical Fibers
… understanding, exploitation, and utilization of physical phenomena. Traditional single-point sensing methods are being challenged by the multi-point or distributed sensing capabilities afforded by optical fiber sensors. A powerful technique available for distributed sensing involves the use of …
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Modelling the performance and dynamics of vapour compression refrigeration systems
The impact of refrigeration systems on the environment can be reduced by the use of alternative reffigerants which are less harmful to the atmosphere and the optimisation of systems and control strategies to deliver increased levels of energy efficiency. Mathematical modelling offers the …
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Investigation of system-level ESD induced soft failures
… that can have negative implications for the performance of systems during operation. ESD is a brief, high-current stress that when applied to a functional system, can cause a variety of problems ranging from temporary system malfunction to permanent failure of components within the system …
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Elastic stretchable optical fibers
The utilization of soft materials in the design of optical systems provides opportunities for imparting these optical systems with completely unprecedented properties. This will enhance performance of systems, such as optical fibers, and enable new application scenarios. Here, we report the design, …
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Prediction of waiting time for entities in independent and merged queues using Markov chain and machine learning techniques
… for any organization is a factor in making profit and extending business. Waiting time has become one of the most critical features in measuring the performance of systems; managers try to predict and minimize this factor. On the other hand, any system can have different customers. Thus, …
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A Study of Disk Performance Optimization.
<p>Response time is one of the most important performance measures associated with a typical multi-user system. Response time, in turn, is bounded by the performance of the input/output (I/O) subsystem. Other than the end user and some external peripherals, the slowest component of the I/O …
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Domestic gas consumption, household behaviour patterns, and window opening
… for central heating is a function both of the efficiency of the heating system and the way in which it is used. While many studies have concentrated on the performance of systems and their controls, there have been few studies of occupant behaviour. The thesis therefore studies household …
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The design and performance of non-linear vibration isolating materials.
The mechanical properties of resilient cellular materials, such as dynamic stiffness and damping, depend on several physical parameters characteristic of the material and the conditions of use, eg permeability, elastic modulus, cellular structure, static pre-strain. In many end use situations the …
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Packet data communications over coded CDMA with hybrid type-II ARQ
This dissertation presents in-depth investigation of turbo-coded CDNIA systems in packet data communication terminology. It is divided into three parts; (1) CDMA with hybrid FEC/ARQ in deterministic environment, (2) CDMA with hybrid FEC/ARQ in random access environment and (3) an implementation …
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Projeto e implementação em FPGA de um processador com conjunto de instrução reconfigurável utilizando VHDL
… is an intermediate solution at the resolution of complex problems, making possible to combine the speed of the hardware with the flexibility of the software. An reconfigurable architecture possess some goals, among these the increase of performance. The use of reconfigurable …
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The effect of flotation reagents on the coagulation and dewatering of flotation tailings
… serious difficulties. Water constitutes 80-85% of the mineral pulp in the flotation process, emphasising the significance of its role. However, water recycling from tailings dams and dewatering systems is becoming increasingly essential, yet it is impeded by the adverse effects of residual …
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Weak acid/bases and pH control in upflow anaerobic sludge bed reactors
… the following tasks were set: • Development of a simple method for simultaneous determination of the H₂CO₃*alkalinity (carbonate system alkalinity) and SCFA concentration in anaerobic systems to be used in, (1) assessing the H₂CO₃*alkalinity requirements of different types of wastes when …
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