All Figures

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{2778.f1.EPS}\end{figure}$ Figure 1: The theoretical structure functions and the comparison with observations for PSR B1642-03. a) The case for the best fit parameters: the solid and dashed lines represent the structure functions for $\beta =11/3$ and $\beta =4$ , respectively. b) The case where C_-4 is treated as free parameter: the dashed, solid and dotted lines represent C_-4=2.1, 1.8 and 1.5 ${\rm m}^{-20/3}$ , respectively. c) The case where H is treated as free parameter: the dashed, solid and dotted lines represent H=0.4, 0.25 and 0.2 kpc, respectively. (Note: Solid dots are observational data from S2000. Solid lines represent theoretical results by the adoption of the best parameters listed in Table 1. Dashed and dotted lines show the influence of the variation of one parameter on the structure function while the other four parameters kept constant from Table 1.)
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{2778.f2.EPS} \end{figure}$ Figure 2: The theoretical structure functions and the comparison with observations for PSR B0329+54. a) The case for the best fit parameters: the solid and dashed lines represent the structure functions for $\beta =11/3$ and $\beta =4$ , respectively. b) The case where C_-4 is treated as free parameter: The dashed, solid and dotted lines represent C_-4=1.5, 0.8 and 0.1 ${\rm m}^{-20/3}$ , respectively. c) The case where H is treated as free parameter: the dashed, solid and dotted lines represent H=1.2, 0.7 and 0.2 kpc, respectively. See the note of caption to Fig. 1 for details.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{2778.f3.EPS} \end{figure}$ Figure 3: The theoretical structure functions and the comparison with observations for PSR B0736-40. a) The case for best fit parameters: the solid and dashed lines represent the structure functions for $\beta =11/3$ and $\beta =4$ , respectively. b) The case where C_-4 is treated as free parameter: the dashed, solid and dotted lines represent C_-4=10^4.2, 10^4.1 and 10⁴ ${\rm m}^{-20/3}$ , respectively. c) The case where H is treated as free parameter: the dashed, solid and dotted lines represent H=1.5, 1.05 and 0.5 kpc respectively. See the note of caption to Fig. 1 for details.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{2778.f4.EPS} \end{figure}$ Figure 4: The theoretical structure functions and the comparison with observations for PSR B0740-28. a) The case for best fit parameters: the solid and dashed lines represent the structure functions for $\beta =11/3$ and $\beta =4$ , respectively. b) The case where C_-4 is treated as free parameter: the dashed, solid and dotted lines represent C_-4=200, 100 and 10 ${\rm m}^{-20/3}$ , respectively. c) The case where H is treated as free parameter: the dashed, solid and dotted lines represent H=1.5, 0.95 and 0.5 kpc, respectively. See the note of caption to Fig. 1 for details.
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In the text