All Tables

Table 1: Number distribution of our quasar sample among the redshift and the absolute magnitude bins.
Table 2: Ionization potentials of ions.
Table 3: Measured line fluxes; $2.0 \leq z < 2.5$ .
Table 4: Measured line fluxes; $2.5 \leq z < 3.0$ .
Table 5: Measured line fluxes; $3.0 \leq z < 3.5$ .
Table 6: Measured line fluxes; $3.5 \leq z < 4.0$ .
Table 7: Measured line fluxes; $4.0 \leq z < 4.5$ .
Table 8: Measured velocity shift and line width of HILs and LILs.
Table 9: Dependences of the normalized flux ratios on redshift and absolute B magnitude.
Table 10: Model predictions of emission-line flux ratios.
Table 11: Measured fluxes by adopting local continuum method.
Table 12: Observed and model line ratios; $2.0 \leq z < 2.5$ .
Table 13: Observed and model line ratios; $2.5 \leq z < 3.0$ .
Table 14: Observed and model line ratios; $3.0 \leq z < 3.5$ .
Table 15: Observed and model line ratios; $3.5 \leq z < 4.0$ .
Table 16: Observed and model line ratios; $4.0 \leq z < 4.5$ .