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Showing 1 to 20 of 48 for “"MWD"”.
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A Neural Network Receiver for EM-MWD Communication
… electro-magnetic measurement while drilling (EM-MWD) systems is often corrupted by non-white surface noise. The inability to reliably decode the transmitted signals in a noisy environment limits the depth at which EM-MWD systems can operate. Correlation receivers, which are optimal in the …
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UNDERSTANDING THE MOLECULAR WEIGHT DISTRIBUTION SHAPE-PROPERTY RELATIONSHIP BASED ON LINEAR UNIMODAL AND BIMODAL POLYETHYLENES MODEL SYSTEM
Molecular weight distribution (MWD) shape is crucial in determining the properties of polymers. Previous studies on comparison of the unimodal and bimodal MWD shape without controlling dispersity, chain branching, phase separation or average molecular weight make it hard to decouple the independent …
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Planning for monitoring of probe hole drilling and pre-excavation grouting with measurement while drilling (MWD), vibration monitoring, and ground penetrating radar (GPR)
Probe hole drilling and pre-excavation grouting are methods commonly used in rock tunneling to mitigate the significant risk caused by high groundwater pressures and potentially high groundwater inflows. The current state of the practice involves measuring groundwater inflow rates through the probe …
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Planning for monitoring of probe hole drilling and pre-excavation grouting with measurement while drilling (MWD), vibration monitoring, and ground penetrating radar (GPR)
Probe hole drilling and pre-excavation grouting are methods commonly used in rock tunneling to mitigate the significant risk caused by high groundwater pressures and potentially high groundwater inflows. The current state of the practice involves measuring groundwater inflow rates through the probe …
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Application of Measurement While Drilling Data for Mine Blast Optimization Utilizing Machine Learning Techniques with Iron Ore Mine Data
… capacity to record Measurement While Drilling (MWD) data but don't utilize it. This project investigates and analyzes MWD data from an anonymous iron ore mine. Machine learning was used to analyze the MWD data for the sake of improving blast optimization and productivity and has been used to …
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Synthesis and Characterization of Linear and Branched Polylactic Acid for Use in Food Packaging Applications
… Linear, narrow molecular weight distribution (MWD) PLA resins were synthesized, as well as resins containing both high molecular weight branched structures and low molecular weight chains and oligomers. Narrow MWD resins were synthesized for use as adhesives for corrugated paperboard and broad …
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Dependence of transuranic content in spent fuel on fuel burnup
… to achieve fuel burnups of 30, 50, 70 and 100 MWD per kg of initial uranium. These burnups demanded reload enrichments of 3.15%, 4.63%, 6.26% and 9.01% U-235 w/o respectively. The resultant spent fuel transuranic isotopic compositions were then provided as input into ORIGEN to study the decay …
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Integrating Machine Learning Techniques with Measurement-While-Drilling Data for Subsurface Characterization in Open-Pit Mines
Measurement-While-Drilling (MWD) systems generate continuous drilling data that reflect subsurface conditions in real time. With the increasing availability of this data, there is a growing opportunity to use data-driven methods to support geological interpretation and geotechnical risk assessment …
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Investigation of Tail Injury at Lackland Air Force Base Training Kennels for Military Working Dogs
… On average it costs $232.90 a month to feed one MWD using the standard formula of food. If a specialty diet is needed, that cost can increase to $527.49 a month for one MWD. On average, it costs $101.19 - $103.01 for 10-day treatment for one MWD tail injury. Tail bandages are routinely changed …
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Investigations of Structure–Property Relationships in Semicrystalline Thermoplastic Polymers: Blown Polyethylene Films and Polyacrylonitrile Copolymers
… weight (MW) and molecular weight distribution (MWD) using a high stalk bubble configuration. The processing conditions were varied such that three film gauges, each fabricated at three frost line heights (FLH), were produced. Crystalline orientation and tear resistance properties of the films …
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Characterization of Structure-Property Relationships of Poly(urethane-urea)s for Fiber Applications
… weight (MW), molecular weight distribution (MWD), and composition, and hard segment content and composition. Of those, the influence of the molecular weight distribution of the polyol used for soft segments was of foremost interest and had previously been largely neglected during the course …
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Validation of the use of low enriched uranium as a replacement for highly enriched uranium in US submarine reactors
… to set the burnup requirement of the HEU (333 MWd/kg) and LEU (93.5 MWd/kg) fueled reactors, and each reactor was depleted to the end of life. The results showed that naval reactors could be switched to LEU without sacrificing the lifetime submarine core or increasing reactor volume. Even if …
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Arterial and venous adaptations to short-term handgrip exercise training
… was measured as the maximum walking distance (MWD) in 6 minutes. FVF [Ainf: HF 15.3 ± 6; controls 22 ± 6.7; Vcap: HF 1.4 ± 0.5; controls 2.0 ± 0.4; Vout: HF 24.5 ± 9.4; controls 33 ± 10 mL · 100 mL tissue<sup>-1</sup> · min<sup>-1</sup>; and forearm vascular resistance: HF 7.8 ± 3; controls 4.6 …
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Monitoring-While-Drilling for Open-Pit Mining in a Hard Rock Environment: An Investigation of Pattern Recognition Techniques Applied to Rock Identification
… environment using monitoring-while-drilling (MWD) data. Blast hole drilling data has been collected from an open-pit taconite mine. The data was smoothed with respect to depth and filtered for non-drilling data. Preliminary analysis was performed to determine classifier input variables and a …
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Modelado matemático del mezclado reactivo de poliolefinas para su uso en el reciclado de materiales plásticos
… una distribución, ya sea de pesos moleculares (MWD) o de composición química (CCD). A partir de los primeros momentos de las distribuciones se calculan los pesos moleculares promedio. La aplicación de la segunda de las técnicas hace posible, luego de varios pasos matemáticos complejos, el …
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Removal of complexed iron by chemical oxidation and/or alum coagulation
… The relative molecular weight distribution (MWD) of the DOC present was analyzed to evaluate how changes in this parameter affected the efficiency of soluble iron removal by oxidation. In addition, the MWD of selected coagulated samples was evaluated to determine how this parameter affected …
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Design strategies for optimizing high burnup fuel in pressurized water reactors
… batch-averaged discharge fuel burnup, from ~30 MWd/kg in the 1970s to ~50 MWd/kg today, was achieved mainly by increasing the reload fuel enrichment to allow longer fuel cycles: from an average of 12 months to about 18 months. This also reduced operating costs by improving the plant capacity …
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Analysis of the proliferation resistance of the modular pebble bed high temperature gas reactor
… was determined for different burnups up to 94 MWD/kg. This data shows that the fuel is very poor nuclear weapon material. Safeguard systems were also designed in agreement with the International Atomic Energy Agency's standards to prevent diversion of significant quantities of fissile material.
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Investigation of the oxidative degradation mechanisms and melt stabilisation of a new generation metallocene polytehylene
… and narrower molecular weight distribution (MWD). Melt flow measurements and GPC have shown that after the first extrusion pass, the initial narrower MWD of m-LLDPE is retained (compared to z-LLDPE), but upon further multiple extrusion passes it undergoes much faster broadening of its MWD …
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Structure-property behavior of free radical synthesized polydimethylsiloxane-polystyrene block polymers and polytetramethyleneoxide based ionene elastomers
… (MW) and the molecular weight distribution (MWD) of the PS blocks varied with the PDMS block length (block MW) comprising the macroinitiators, and the styrene conversion level. As the PDMS block length or the conversion level increased, the average PS block MW increased, and the molecular …
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