Dimensional accuracy is a key control issue in direct 3D printing. Part shrinkage due to material phase changes often leads to final shape deviations, requiring extra postmachining steps for correction. Shrinkage has traditionally been analyzed through finite element simulation and experimental investigations. Systematic models for accuracy control through shrinkage compensation are hardly avai...

The wavelet shrinkage denoising approach is able to maintain local regularity of a signal while suppressing noise. However, the conventional wavelet shrinkage based methods are not time-scale adaptive to track the local time-scale variation. In this paper, a new time-scale adaptive denoising method for deterministic signal estimation is presented, based on the wavelet shrinkage. A class of smoo...

The investigation involved twelve different synthetic aggregates produced in the TTl rotary kiln, one commercially produced synthetic lightweight aggregate, and one regular weight aggregate. Each aggregate was used in concrete which was subjected to a variety of physical durability investigations including autoclave expansion, long-time reactivity, freeze-thaw, and shrinkage. From the results o...

In general, it is desirable to finish the weld quickly, before a large volume of surrounding metal heats up and expands. The welding process used, type, welding current and speed of travel, thus, affect the degree of shrinkage and distortion of a weldment. The use of mechanized welding equipment reduces welding time, metal affected zone and consequently distortion. This article helps to define ...

Hierarchical modeling allows for two appealing characteristics in a design for false discovery rate control in multiple hypothesis testing. First, it leads to a more natural way of taking into account the uncertainty in the estimates than simply summarizing the result of each test in a p-value. Second, as the data are treated as exchangeable rather than independent, this allows for feedback as ...

Supplementary cementitious materials (SCMs) and fillers play an important role in enhancing the mechanical properties durability of concrete. SCMs are commonly used self-consolidating concrete (SCC) mixtures to also enhance their rheological properties. However, these additives could have significant effects on viscoelastic Existing models for predicting creep drying shrinkage do not consider e...

In bayesian wavelet shrinkage, the already proposed priors to coefficients are assumed be symmetric around zero. Although this assumption is reasonable in many applications, it not general. The present paper proposes use of an asymmetric shrinkage rule based on discrete mixture a point mass function at zero and beta distribution as prior non-parametric regression model. Statistical properties s...