Koiter's nonlinear plate theory is used to simulate the wrinkling patterns observed in stretched thin elastic sheets. The phenomenon considered is associated with wrinkle patterns distributed over the interior of the sheet, in regions where the stretching and bending energies are of the same order of magnitude. Numerical solutions to several equilibrium boundary-value problems are obtained by t...

Lagrangian relaxation technique is successfully applied to solve sequence dependent setup time flowshop problem to minimize the total weighted tardiness. The relaxed problem can be decomposed into each job-level subproblem that can be effectively solved by dynamic programming. Two types of the additional constraints for the violation of sequence dependent setup time constraints are imposed to t...

Branching structure is often used as a supporting of the grid shell due to its geometrical and force-transferring features, rationality shape very important. The “physical” “numerical” hanging models can be for joint form-finding branching free-form shell. However, slack elements may exist in equilibrium model which corresponds inefficient members form-found structure. To solve this problem, me...

A fascinating aspect of the dynamics of supercooled liquids and polymers is the degree to which the reorientational or segmental relaxation time, τR, governs various properties. 1,2 For example, the shape of the relaxation peak, commonly reflected in the Kohlrausch stretch exponent, the state points associated with the dynamic crossover, and the dynamic correlation volume for many glass formers...

The molecular structure of bis-5-hydroxypentylphthalate (BHPP) is like dihexyl phthalate but having appended to it two hydroxyl end groups, which contribute additional dipole moments and capacity for hydrogen-bond formation. In a previously published dielectric study of the primary and secondary relaxations of BHPP, it was found that all the dynamic properties are normal except for the anomalou...