The theoretical analysis shows that a special density of modes (DOM) can induce abnormal spectrum of absorption,dispersion,spontaneous emission and transient gain without inversion,and they can be controlled by an externally applied coherent light.

Because of the interruption to the stack periodicity of the unit cells, the electromagnetic density of modes (DOM) of the photonic crystals was changed, so that the transmission of the light waves changed.

Experimental identification of modal density parameters of aluminum honeycomb sandwich panel;

Study of modal density of elastic-v iscoelastic composite plate;

Calculation method of auto body complex sub-structure modal density

Based on these, according to the concept of the fuzzy density, a method is proposed to choose suitable fuzzy partitions for input features.

The main idea was to obtain belief function using the wavelet coefficient of infrared images and low light level images,then construct fuzzy density using the fuzzy edge evaluation function of local area,finally get fused wavelet coefficient by fuzzy integral and reconstruct fused image by inverse wavelet transform.

In order to address this issue, fuzzy density is used here to partition the input feature reasonably.

Application of universal Kriging to the density modeling in north western Xujiaweizi area of Daqing oil field;

The density models for calculating basement of sedimentary basin in sea area by gravity inversion were set up in this paper, and the accurate and approximate formulas for calculating gravity anomalies were derived.

By analyzing the merits and defects of the density based clustering algorithm, the concept of density model is proposed.