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 9 of 9 for “"advance rate"”.
-
Examination of excavation chamber pressure behavior on a 17.5 m diameter earth pressure balance tunnel boring machine
… were influenced by changes in volumetric flow rates into the chamber via the cutterhead and out of the chamber via the screw conveyor. Increases/decreases in net volumetric inflow caused increases/decreases in chamber pressure. The magnitudes of pressure changes were linearly correlated to the …
-
Integrated environmental degradation model for Fe-Ni-Cr alloys in irradiated aqueous solutions
An integrated model has been developed to evaluate the effect of reactor flux, fluence, and other operating conditions on crack growth rates in austenitic stainless steels in boiling water reactor (BWR) environments. The model evaluates the following in order to account for all factors affecting …
-
Understanding emplacement of rapidly-emplaced volume-limited lava flows from Mount Etna’s 2011-2012 eruption : a multidisciplinary study
… flow, number of confluences, average and maximum advance rate in the proximal zone, and duration of fire fountaining. However, unlike previous studies, no correlation was found between final flow length and mean output rate. Visual analysis identified two flow groups based on morphology within the …
-
Syn-eruptive degassing of a single submarine lava flow : constraints on MORB CO2 variability, vesiculation, and eruption dynamics
… and the implications this has for estimating the advance rates and durations of seafloor eruptions. We present dissolved volatile concentrations (mainly of CO2 and H2O) and vesicle size distributions (VSDs) for a unique suite of MORB glasses collected at the East Pacific Rise, ~9° 50′ N. These …
-
Remote Detection of Surging Glaciers Across High Mountain Asia
… Surging variables, including duration, terminus advance distance, terminus advance rate, and surge recurrence intervals were also quantified using terminus change profiles. A statistical assessment was performed on the data to test surging relationships both intra- and extra- sub-regionally. In …
-
Syn-eruptive degassing of a single submarine lava flow : constraints on MORB CO₂ variability, vesiculation, and eruption dynamics
… and the implications this has for estimating the advance rates and durations of seafloor eruptions. We present dissolved volatile concentrations (mainly of CO 2 and H20) and vesicle size distributions (VSDs) for a unique suite of MORB glasses collected at the East Pacific Rise, ~9° 50' N. These …
-
Seismic Wave Velocity Variations in Deep Hard Rock Underground Mines by Passive Seismic Tomography
… the tool of passive seismic tomography, the advance rate of operation and mining designs can be updated considering the induced stress level in the abutting rock. Most of our current understanding of rock mass behavior associated with mining-induced seismicity comes from numerical modeling …
-
Predicting tunnel boring machine utilization using discrete event simulation models for hard rocks
… indicator for TBMs is the average daily advance rate (AR) which is product of rate of penetration (ROP), utilization (U). While there are various models for estimation of machine ROP with acceptable levels of accuracy and reliability, the models for prediction of machine utilization are …
-
Analysis and identification of geohazards using multi-source remote sensing data
… the past decade, earth observation has incorporated a diverse array of sensors and platforms, empowering us to monitor and identify these human-induced geohazards. The integration of multi-source remote sensing data can detect more different types of geohazards, can effectively improve the …