Nowadays, numerical analysis becames more and more popular in designing large butterfly valve. In this paper, fluid structure interface(FSI) analysis is carried out to estimate fluid field and performance of large butterfly valve in diameter of 2.2m. A three-dimensional model of butterfly valve is used to do simulation perfectly. The FSI analysis not only analyzes the fluid field at various val...

High quality obstetric images have become readily available with fast magnetic resonance imaging protocols or new 3D ultrasound probes. These obstetric images provide detailed information which can be used to create realistic models of the fetus at different stages of gestation. Unfortunately, the anatomy of the mother is only partially visible in the obstetric images and a full model of the pr...

The overall intent of this research is to develop numerical models of erosion of levees, dams and embankments, validated by physical models. The physical models are performed at 1-g and at high g’s using a geotechnical centrifuge. The erosion is modeled in detail, from beginning to end, that is from the time the levee is overtopped until the levee is breached. Typical quantities measured as a f...

...................................................................................................... 4 Commercial Analytics .................................................................................. 4 IMSL Numerical Library ........................................................................... 4 A Motivating Example ...................................................................

How well are single-cell properties reproduced by the present-day neuronal models? Recently, several labs have approached this question by assessing the quality of neuron models with respect to spike timing prediction or characteristic features of the voltage trace. So far, every modeler used his own preferred performance measure on his own data set. The Quantitative Single-Neuron Modeling Comp...

Induction hardening of gear wheels is modeled. The model consists of two nonlinear partial differential equations describing the distributions of magnetic and temperature fields in the system. All material parameters are supposed to be functions of temperature. The model is then solved numerically in the 3D hard-coupled formulation using the professional code FLUX3D supplemented with a number o...

The Andes physics tutoring system has a student modeler that uses Bayesian networks. Although the student modeler was evaluated once with positive results, in order to better understand it and student modeling in general, a sensitivity analysis was conducted. That is, we studied the effects on accuracy of varying both numerical parameters of the student modeler (e.g., the prior probabilities) a...

Dual scaling, a variation of multidimensional scaling, can reveal the dimensions underlying scores, such as raters’ judgments. This study illustrates the use of a dual scaling analysis with semi-structured interviews of raters to investigate the differences among the raters as captured by the dimensions. Thirty applications to a one-year post-Bachelor’s degree teacher education program were rat...

Nowadays acoustic emission (AE) testing based on the Kaiser Effect (KE) is increasingly used to estimate the in-situ stress in laboratories. In this work, this effect is assessed on cylindrical specimens in numerical simulations of the cyclic loadings including loading, unloading, and re-loading cycles using a 3D code called the particle flow code (PFC) based upon the distinct element method. T...