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Converting a CAD Model into a Manufacturing Model for the Components Made of a Multiphase Perfect Material
To manufacture the component made of a multiphase perfect material (including homogeneous
and multi heterogeneous materials), it CAD model should be processed and converted into
layered manufacturing model for further transformation of numerical control (NC) coding. This
paper develops its detailed approaches and corresponding software. The process planning is made
first and includes: (1) determining the build orientation of the component; and (2) slicing the
component into layers adaptively according to different material regions since different materials
have different optimal layer thickness for manufacturing. After the process planning, the layered
manufacturing models with necessary information, including fabrication sequence and material
information of each layer, are fully generated.Mechanical Engineerin
Weakly Supervised Regression with Interval Targets
This paper investigates an interesting weakly supervised regression setting
called regression with interval targets (RIT). Although some of the previous
methods on relevant regression settings can be adapted to RIT, they are not
statistically consistent, and thus their empirical performance is not
guaranteed. In this paper, we provide a thorough study on RIT. First, we
proposed a novel statistical model to describe the data generation process for
RIT and demonstrate its validity. Second, we analyze a simple selection method
for RIT, which selects a particular value in the interval as the target value
to train the model. Third, we propose a statistically consistent limiting
method for RIT to train the model by limiting the predictions to the interval.
We further derive an estimation error bound for our limiting method. Finally,
extensive experiments on various datasets demonstrate the effectiveness of our
proposed method.Comment: Accepted by ICML 202
γ -rigid solution of the Bohr Hamiltonian for the critical point description of the spherical to γ -rigidly deformed shape phase transition
The γ-rigid solution of the Bohr Hamiltonian with the β-soft potential and 0 ≤γ≤30 is worked out. The resulting model, called T(4), provides a natural dynamical connection between the X(4) and the Z(4) critical-point symmetries, which thus serves as the critical-point symmetry of the spherical to γ-rigidly deformed shape phase transition. This point is further justified through comparing the model dynamics with those of the interacting boson model. As a preliminary test, the low-lying structures of Er158 are taken to compare the theoretical calculations, and the results indicate that this nucleus could be considered as the candidate of the T(4) model with an intermediate γ deformation
Analytically solvable prolate-oblate shape phase transitional description within the SU(3) limit of the interacting boson model
A novel analytically solvable prolate-oblate shape phase transitional description for the SU(3) limit of the interacting boson model is investigated for finite-N as well as in the large-N classical limit. It is shown that the ground state shape phase transition is of first order due to level crossing. Through a comparison of the theoretical predictions with available experimental data for even-even 180Hf, 182-186W, 188-190Os, and 192-198Pt, it is shown that this simple novel description is suitable for a description of the prolate-oblate shape phase transition in these nuclei. © 2012 American Physical Society
Simple description of odd-A nuclei around the critical point of the spherical to axially deformed shape phase transition
An analytically solvable model, X(3/2j+1), is proposed to describe odd-A nuclei near the X(3) critical point. The model is constructed based on a collective core described by the X(3) critical point symmetry coupled to a spin-j particle. A detailed analysis of the spectral patterns for cases j=1/2 and j=3/2 is provided to illustrate dynamical features of the model. By comparing theory with experimental data and results of other models, it is found that the X(3/2j+1) model can be taken as a simple yet very effective scheme to describe those odd-A nuclei with an even-even core at the critical point of the spherical to axially deformed shape phase transition. © 2011 American Physical Society
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