curtate

The surface of sinuses was represented by the extrusion of curtate epicycloid.

High-speed stage Modulus m Number of Modification teeth coefficient [z.sub.s] [z.sub.p] [x.sub.s] [x.sub.p] 1.5 15 69 0.5 -0.5 Low-speed stage Modulus m Number of Pinwheel Curtate ratio teeth pitch [K.sub.1]/mm radius [r.sub.b]/mm [z.sub.c] [z.sub.b] 1.5 39 40 88.0 0.7686 TABLE 5: Natural frequencies from experiment and analytical model.

Four special cases are, (1) If this component is positive, the trajectory is a curtate cycloid; (2) If this component is negative, the trajectory is a prolate cycloid; (3) If this component is zero, the trajectory is a cycloid; and (4) If this component is equal to the electromagnetic drift velocity, the trajectory is a straight line; both the curvature and torsion of the path are zeros.

after the structure of transition state, the curtate trend of the length is slow down, and the 2O-4H bond appeared, The length between atoms remains unchanged; at the same time, the length of 1C-4H is greatly elongated until the bond is broken.

According the relation between d and r we speak about a curtate (contracted) cycloid (d < r) or about a prolate one (d > r).