Mill Configurations Research Articles

The Ψ spectrum from lattice QCD with 2 + 1 flavors of dynamical quarks

We describe the bottomonium spectrum obtained on the MILL configurations which incorporate 2+1 flavors of dynamical quarks. We compare to quenched and 2 flavor results also on MILL configurations. We show that the lattice spacing determination using different quantities shows clear signs of convergence with 2+1 flavors and give results for the leptonic width and hyperfine splitting, in the form of the ratio of the 1st excited state of the Ψ to that of the ground state.

A Dynamic Rolling Mill Simulator for All Reasons

A general-purpose, PC-based, dynamic simulator program is described which is suitable for investigating control system design, operator training and automation system testing on a variety of tandem rolling mill configurations having between one and seven stands. Hot or cold flat rolling of steel or aluminium products is selected by appropriate data base specifications. Physically based models are used for all process components including force, torque, power, strip flatness and strip temperature. Non-linear actuator models ensure a realistic representation of the majority of drive motor, rollgap position and roll bending systems is achieved.

PARTICLE SIZE CHARACTERIZATION OF A JET MILL PRODUCT VIA PRINCIPAL COMPONENT ANALYSIS

ABSTRACT A powerful statistical technique, principal component, analysis, can be used to characterize the product particle size distribution of a jet mill. Usually the average and variance of a product size distribution are used to characterize or specify the product. With principal component analysis, a broader spectrum of the product distribution can be characterized by only one or two principal components. Using these principal components in reverse, one can approximately reconstruct the particle size distribution. These principal components can also be treated as response variables and regressed against operating variables of the micronizing process. The technique employed in this study thus offers: 1. a useful method for characterizing the jet mill product size distributions, and can be directly adapted in powder production operations. 2. an alternate basis for comparing jet mill configurations and operating conditions.