In this research, wafer-level underfill (WLUF) joined with flip-chip technology are proposed, and a nonlinear finite element analysis, combined with a process-oriented simulation technique, is used to investigate the packaging assembly effect of the WLUF thermal-compressive process.
A compressive cooling process is used, similar to that in a domestic refrigerator.
Recently, the weakness of existing compressive sensing process from the perspective of the chosen-plaintext attack has been discovered.
We used the UDEC code and a numerical servo-controlled program for controlling the progressive compressive loading process to avoid sudden violent failure of the models.
To enhance the security and performance of compressive sensing process, double random phase encoding (DRPE) based block compressive sensing has been designed, which is a chaos-based random phase encoding in fractional Fourier domain for each image block.
The compressive failure process in microscopic scale consists of (1) the crushing of cenospheres and (2) the plastic deformation and fracture of the matrix.
Finally, a parametric study was performed on the effect of matrix modulus and matrix yield stress on the compressive fragmentation process.
From numerical results and discussion, it is clear that the effects of matrix cracking damage and contact upon postbuckling behavior of the debonded composite sandwich plates are significant during compressive loading process.
