OBJECTIVE This study was conducted to determine whether early initiation of combined hormonal contraception under direct clinical observation following successful medical abortion increases continuation rates with the method compared to traditional "Sunday start." STUDY DESIGN Women enrolled in a multicenter medical abortion trial with mifepristone and misoprostol who requested combined hormo...

Abstract Magnetic field downward continuation is an important technique for expanding geomagnetic database, which can separate superimposed anomalies and enhance the resolution of local anomalies. However, adaptability fixed filter operator existing algorithm to wavenumber domain frequency component observed data not good enough, leads poor applicability algorithm, resulting in algorithm. The i...

In order to make better agreement with transonic wind tunnel experimental data, which was obtained in the Japan Aerospace Exploration Agency (JAXA) in 1990’s, we proposed new mathematical model to improve the previous model. The bifurcation diagram was analyzed by a continuation method. The continuation method can continuously follow the solutions of dynamical system, such as a limit cycle osci...

In emission tomography, a principled means of incorporating a piecewise smooth prior on the source f is via a mixed variable objective function E(f; l) deened on f and binary valued line processes l. MAP estimation on E(f; l) results in the diicult problem of minimizing an objective function that includes a nonsmooth Gibbs prior deened on the spatial derivatives of f. Previous approaches have u...

In a recent paper by Chen and Mangasarian (C. Chen, O.L. Mangasarian, A class of smoothing functions for nonlinear and mixed complementarity problems, Computational Optimization and Applications 2 (1996), 97±138) a class of parametric smoothing functions has been proposed to approximate the plus function present in many optimization and complementarity related problems. This paper uses these sm...