A Geiger mode planar InGaAs/InP avalanche photodiode(APD)with a cascade peripheral junction structure to suppress edge breakdowns is designed by finite-element analysis.

Using the time domain separation technology through edge diffraction and virtual instrument test technology,we do the experimental study of how the free-field method is applied to structure-borne sound insulation measurement.

In this paper,a numerical method to evaluate the edge diffraction effect on sound insulation measurement in free-field was investigated using finite element method(FEM) and boundary element method(BEM) based on the commercial sound and vibration analysis software LMS-SYSNOISE.

The theory of Incremental length diffraction coefficients (ILDC) is one of the efficient methods to calculate the edge diffraction of electrically large scaled complex objects.

An expression of edge diffraction field in the original GRECO literature is in error, the error-corrected formulas are derived by using method of equivalent edge.

In this paper, the increment edge diffraction coefficient is achieved through the increment length diffraction coefficient (ILDC) and the equivalent electrical current method(MEC), and the far fields in an arbitrary azimuth angle is related to arbitrary incident field through the derived diffraction coefficient, so that the high-frequency scatted field can be computed conveniently.

Research of marginal functions and marginal maps;