62 research outputs found
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Liquid membrane system for the removal and concentration of transuranic elements
The goal of this program is to develop an efficient, reliable, and radiation-resistant modified liquid membrane system (MLMS) for the selective removal and concentration of transuranic elements (TRUs) and strontium-90 from dissolved Hanford sludge wastes. The efforts are divided into three categories: (1) demonstration and optimization of the MLMS for the TRUEX and SREX processes using simulant waste solution; (2) development of a radiation-resistant microporous divider and membrane module for testing with actual waste solutions; and (3) demonstration of the MLMS for the TRUEX and SREX processes using actual Hanford waste. Successful completion of these development efforts will yield a compact, versatile, and reliable MLMS for implementation with the TRUEX and SREX processes. The MLMS is simple, stable, more efficient, and easier to control and operate than conventional solvent-extraction processes, such as those employing centrifugal contactors. In addition, the MLMS process offers operational cost savings over the conventional technology, by exhibiting at least a 10% reduction in the consumption of extractant chemicals
Extended structured adaptive supervisory control model of shop floor controls for an e-Manufacturing system
Semantic Tolerancing
Recently we developed a new tolerance modeling scheme, semantic tolerance modeling, to enable interpretable and accurate tolerance analysis. In this paper, a new dimensioning and tolerancing practice, semantic tolerancing, is proposed with the theoretical support of semantic tolerance modeling. Based on the principles of interpretability, this tolerancing approach allows for better design intent capturing, including flexible material selection, component sorting in selective assembly, and assembly sequence
Periodic Loci Surface Reconstruction in Nano Material Design
Recently we proposed a periodic surface (PS) model for computer aided nano design (CAND). This implicit surface model allows for parametric model construction at atomic, molecular, and meso scales. In this paper, loci surface reconstruction is studied based on a generalized PS model. An incremental searching algorithm is developed to reconstruct PS models from crystals. Two metrics to measure the quality of reconstructed loci surfaces are proposed and an optimization method is developed to avoid overfitting
Analysis on the performance sensitivity and stability of the ultrasonic atomization liquid desiccant regeneration system
A resource-oriented tolerance representation scheme for the planning of robotic machine tending operations in automated manufacturing systems
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