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Showing 1 to 20 of 42 for “"Reducer"”.
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Fast Reducer Hyperobjects
This thesis investigates the performance of reducer hyperobjects, a feature of the Cilk task-parallel runtime system that enables concurrent associative updates to nonlocal variables. Reducers are more performant than more traditional methods of enabling concurrent updates, such as locking and …
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Characterization of Friction Reducer Properties in Oil-Field Operations
Friction reducers are essential additives used to economically achieve the high pumping rates required for slickwater fracturing. Decreased friction reducer performance in high-TDS brines has been a major challenge for reusing produced water in hydraulic fracturing. Little work has been done to …
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Adaptive architecture-transparent policy control in a distributed graph reducer
… and ancestry information in a distributed graph reducer for a nonstrict functional language. The results contribute to the exploration of more flexible run-time-system-level parallelism control implementing a semi-explicit model of parallelism, which offers productivity and high level of …
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Spec2Fab : a reducer-tuner model for translating specifications to 3D prints
… solution relies on two new data structures: a reducer tree that efficiently parameterizes the space of material assignments and a tuner network that describes the optimization process used to compute material arrangement. I provide an application programming interface for specifying the desired …
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Development Of Design Equations For A Square-tube Subbase Supporting A Shaft-mounted Speed Reducer
Shaft mounted speed reducers are used in material handling applications, such as conveyor systems for transporting ore out of mine shafts. A subbase joins the reducer with an electric motor, and serves to limit the misalignment between the motor shaft and the reducer input shaft. The entire …
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Impact of slickwater fracturing fluid compositions on the petrophysical properties of shale and tightsand
… for a successful stimulation. A friction reducer is often used to reduce the flowing friction in the wellbore during hydraulic fracturing. Extensive researches have been conducted to examine the extent it can reduce the fluid friction in tubings; however, no research has been reported on …
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Memory abstractions for parallel programming
… interoperate with linear stacks, (ii) efficient reducers, (iii) reducer arrays, (iv) ownershipaware transactions, and (v) location-based memory fences. To demonstrate the utility of memory abstractions, my collaborators and I developed Cilk-M, a dynamically multithreaded concurrency platform …
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Modeling and Validation of Rolling Rotor Switched Reluctance Motors for Automotive Applications
… some applications irreversibility of the speed reducer might be necessary. Rolling rotor switched reluctance motors (RRSRM) comprise all advantages of switched reluctance motors and due to rolling motion of the motor covers also the function of speed reduction mechanism. Wide range of analyzed …
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Dissociation of carbon dioxide in an Al/Al2O3 microchannel plasma reactor at atmospheric pressure
… product of dissociation, CO, is used as a reducer gas in the production of industrially valuable chemicals such as methanol and formic acid.
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Encapsulation of particles using brittle coatings for subterranean applications
… fracturing fluids, was explored.;The viscosity-reducer was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution in water before and after being subjected to a compression test. Polyurethane-coated particles had a high leach …
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Manipulation of 3D knotted polygons
… be used in this architecture which are entitled: Reducer, Lengthener and OutsideInLengthener are also discussed in this thesis. These building blocks manipulate the existing polygons - increasing or decreasing their size.</p>
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Designing and modeling of a new continuous steelmaking process
… would exist in the subsequent vessels (Reducer, Finisher, and tundish). Continuous de-O, de-S, and alloying would be accomplished in the cone-shaped Reducer before additional de-S and alloy additions as well as inclusion floatation and homogenization in the Finisher would ensure a …
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Development of a Methodology for Virtual Efficiency Evaluation of Electric Drive Modules
… with the applied torque. Two units, a test reducer and the EDM of the Fiat 500 Battery-Electric Vehicle (BEV), are modelled with different levels of complexity by using three simulation software tools available in the market (MASTA, AVL Excite and Romax). The simulations are performed in …
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Investigation of the autocatalytic Cu(II) reduction processes in the systems with natural polyhydroxylic compounds as ligands /
… for electroless copper plating systems with reducer formaldehyde. Natural polyols are environmentally friendly, easily bio-degradable materials, but has not been studied enough for suitability for copper plating systems. In order to increase of the efficiency, the electroless copper plating …
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Comparison of Some of the Various Methods of Determination of Iron
… using hydroxylamine hydrochloride as the reducer and ferroin as the colorimetric indicator. | These methods of analysis are to be compared with reference to educational value, quantitative reliability, and cost. The educational value is to be considered in light of chemical knowledge that …
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Design automation for circuit reliability and energy efficiency
… a 47.1% reduction in delay for a 32-bit mod-3 reducer. For modulo-15 and above, all of our modulo functional units have better area and delay than their previous counterparts.
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Design and Implementation of a Nonblocking Randomized Work Stealing Scheduler
… FLCN supports other Cilk features such as reducer hyperobjects. Through analyzing the performance of FLCN on various canonical benchmark programs, I find that for programs with low amounts of work, FLCN performs worse than the existing runtime. However, for most programs, I find that FLCN …
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A Novel Approach to Robust Design Using Recent Advances in Robust and Multiobjective Optimization Methods
… engineering design problems, the Golinksi Speed Reducer and the simple Helical Spring design problem to show a more realistic application of the new method.
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Orbital Determination Feasibility of LEO Nanosatellites Using Small Aperture Telescopes
… optical telescope is fitted with an f/6.3 focal reducer, SBIG ST-10XME CCD camera and Optec TCF-S Focuser. This instrumentation allowed for a 22’ X 15’ arcminute FOV in order to accurately image passing LEO satellites. Through the use of the Double-r and Gauss Initial Orbit Determination methods …
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Design and analysis of a nondeterministic parallel breadth-first search algorithm
… cores. Since PBFS employs a nonconstant-time "reducer" - a "hyperobject" feature of Cilk++ - the work inherent in a PBFS execution depends nondeterministically on how the underlying work-stealing scheduler load-balances the computation. I provide a general method for analyzing nondeteriministic …
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