2.To make a rotationcurve one calculates the rotational velocity of stars along the length of a galaxy by measuring their Doppler shifts, and then plots this quantity versus their respective distance away from the galactic center.
5.Constructing rational offset and rational Rotation-Minimizing Frame of Bezier curve or B-spline curve during rendering sweep surface which are compatible with CAD system are two important problems in CAGD.
6.The specific rotation and concentration of the sucrose are measured with laser, It can collect the data and out put the curve real-timely by computer, it has the advantages of easy clarity and high accuracy.
7.With lunar laser ranging observations including 1658 normal points of reflector at MeDonald Observatory in 1971—1979, the curve of earth rotation is calculated and the offset of UT_1-UTC is given in this paper.
8.The torque curve and the hysteresis loop show that the film possesses perpendicular anisotropy. When the ratio of raw materials Mn/Bi is two or so, we can obtain the suitable as, the proper H_c (1-4 kOe), and a very large Kerr rotation angle θK (1.5-2°).
