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Based on the coordinate transformation theory, arbitrary prism invisibility cloaks which is composed of complex, anisotropic and inhomogeneous materials are designed, the permittivity and permeability tensors of the materials are deduced for arbitrary prism cloaks. Such cloaks should be effective at all frequencies. Numerical simulation results are given to validate the arbitrary prism invisibility...
The subject of this work is the composite materials containing ferroelectric spherical or ellipsoidal nanoinclusions embedded in a host material. In order to average the dielectric polarization and to find the effective dielectric permittivity of the structures considered the solution to the Laplace equation are used. The nonlinearity of the ferroelectric material was taken into account. The tunability,...
Some interesting aspects of the field distribution inside an ideal spherical cloak are investigated. The Poynting vector, the local differential propagation constant and the phase velocity distributions are calculated for a plane wave illumination. Then, the group and energy transport velocities are considered and it is shown that they are equal only if the permittivity and permeability dyadics have...
This paper deals with computation of the dielectric constant of BaTiO3 composites according to two computation models. The results showed that the dielectric constant epsiv of materials increases with volume of BaTiO3, which is as same as that reported. At same time, the mediate phase was proved to exist between BaTiO3 and polymer. It indicates that the mediate phase computation model is rational.
Postharvest non-destructive detection methods in fruit quality have been widely studied ever since. This include studies of maturity, bruises and detection of pests or weevil existence in fruits such as apple, banana, zucchini including mango. Regarding fruit grading, the non-destructive methods which can be used are image processing and dielectric properties. Either technique has its own benefits...
The present work reports the findings of computational conformational analysis and dielectric studies of two alkyl alcohols and two phenols, namely hexanol, heptanol, 2-propylphenol and 4-propylphenol and their binary mixtures. The alcohol group is known to be important in the study of influence of processing liquids on the dielectric properties and performance of MEMS devices.
Over these years, market trend and government regulation have lead to the introduction of halogen free material. As CCL supplier, we consider that the benefit of halogen free resin not only for environmental consideration but also enhance some particular characteristics for specific PCB application. We have developed a novel halogen free material. Except excellent thermal performance, we also develop...
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