The dimensions of the

rectangular cavity were 30 mm x 30 mm x 3 mm (length x width x depth).

[2] considered the multilayer rock mass and used the upper bound method to study the influence of the variation of the parameters of the Hoek-Brown failure criterion on the surrounding rock pressure of the deep buried

rectangular cavity. The vault of deep cavity was only considered and assumed to obey a curve function f (x) in the abovementioned studies, and yet, the side wall was ignored in the analysis.

[19] compared the melting process in the

rectangular cavity to the wavy wall at the bottom and the results show that the increase in the value of the amplitude of the bumpy surface causes an increase in the melting rate.

Denton et al., "Electromagnetic coupling between wires inside a

rectangular cavity using multiple-mode-analogous-transmission-line circuit theory," IEEE Transactions on Electromagnetic Compatibility, vol.

For compressible flow in a

rectangular cavity (M = 0.2-0.95), the mean and fluctuation pressure distributions normal to the direction of the flow depend principally on the length-to-depth ratio, L/H [3-5].

Metamaterial has many unusual properties and may lead to important applications, such as absorber [16], wave splitter [17], and subwavelength

rectangular cavity [18].

[16] investigated computationally the variations in the aspect ratio on entropy generation due to natural convection in a

rectangular cavity with differentially heated vertical walls.

The value of the L of the

rectangular cavity length is 150 nm, 200 nm and 250 nm, respectively, when the cavity length of the cavity filter is longer, L, the resonance wavelength is longer and the number of standing waves is more, the result is in agreement with the experimental results, as shown in Figure 4.

According to Hoke-Brown failure criterion and the upper bound theorem of limit analysis, tunnel collapse under seepage forces condition and three-dimensional failure mechanism of a

rectangular cavity were studied in detail [9, 17-21].

The camera unit is embedded in a

rectangular cavity at the back and flips up to conveniently become a front facing camera.

Powell (8) numerically studied the time-evolution of a vertical stretching bridge of Newtonian fluids confined between a

rectangular cavity and planar moving plate.

This is because, unlike lossy metal-walled

rectangular cavity resonators, it does not suffer from the effects of diffraction; thus, it is able to provide an exact analytical solution for arbitrary levels of loss.