It would realize the frequency variation curve, which will fit the ballast′s request.

The response of loads to frequency variation of input and connection between main frequency of lamp and parameters of output circuits is analyzed from intrinsic frequency variation curve of fluorescent lamp in this paper,and we get a way how to select the parameters of inductance and capacitance to match electric property of lamp.

The extension curves are constructed by the geometric continuous conditions by minimizing some fairing functions based on the shortest arc-length, minimum energy and minimum curvature variation of the curves respectively.

The magnitudes of the endpoint tangent vectors are optimized in the process of Hermite interpolation so that the curvature variation of the optimized geometric Hermite curve is a minimum.

Objective To establish common body temperature(BT) variation curve of patients with simple lumber disc excision so as to find abnormal temperature and its causes in good time.

By compiling a computer program with computer-human dialogues and further by displaying a variation curve of errors in calculating celestial body s bearings,the variation of the errors in calculating celestial body s bearings will be readily understood,so that the best timing of observatio.