def METHOD_NAME(self, times, x, y):
    drawdown_t = []
    for t in times:
        if t == 0.0000:
            drawdown_t.append(0.0)
        else:
            u = (x*x * self.Ky_h + y*y * self.Kx_h) * self.S / 4 / self.T / self.T / t
            W = getWellFunction(u)
            s = self.var * W
            drawdown_t.append(s)
    return drawdown_t