(O – C) diagrams for V582 Lyr and V1016 Oph, where the initial time of V582 Lyr is HJD 2451281.8970 and that for V1016 Oph is 2448447.4600. The small red circles(◦) are vis data, the black circles(◦) are CCD data, and the blue triangle(﹩\triangleleft ﹩) is our CCD data. The green and solid lines represent the polynomial fit.