The equation indicates that when the sum of folding angle [alpha] and corresponding central angle
[theta] is equal to 180[degrees], the scissor elements can be arranged around the ring.
In this study it was found that the RCPmi covered the posterior atlanto-occipital interspace and was fan-shaped with a (60.7 [+ or -] 4.4)-degree central angle
. It presented with significant length variations according to the variation of the scanning angles by the MRI.
(3) The aerodynamic roughness is related to the topology of the roughness elements in the upwind sector, which can be described by three parameters: the central angle
[theta], the radius r, and the opening angle [alpha] [13, 19].
The central angle
will be restricted within (-[pi]/4, [pi]/4] or (37[pi]/4, 5[pi]/4], as shown in Figure 2(b).
The four parts have similar profile which consists of two pieces of circular arc; the central angle
of one piece of circular arc is 240[degrees] and the radius is r, while the radius of another piece of circular arc is R, as shown in Figure 2.
Assume the amplitude of the modal shape is A, and expand the modal shape along the central angle
[alpha], then the modal shapes of the two mode can be expressed as:
The purpose of central angle
of small arc [beta] is to form the overlap area S and its outlet shape.
In another word, under the round model, it uses the relationship between changes in a central angle
and component variation under each time index to establish a FI degradation model; under the linear model, it utilizes the relationship between changes in Euclidean distance and component variation under each time index to build the FI degradation model.
At the same time, both working bands can be separately adjusted by simple central angle
of the up Y-shaped strip.
These holes have the same diameter d, and are equally spaced with the same central angle
[zeta] in the same annulus with a specific thickness a, where for different concentric annuli the central angle
[zeta] may be different.