  The tunneling conductance is calculated as a function of the gate voltage in
wide temperature range for the single quantum dot systems with Coulomb
interaction. We assume that two orbitals are active for the tunneling process.
We show that the Kondo temperature for each orbital channel can be largely
different. The tunneling through the Kondo resonance almost fully develops in
the region $T \lsim 0.1 T_{K}^{*} \sim 0.2 T_{K}^{*}$, where $T_{K}^{*}$ is the
lowest Kondo temperature when the gate voltage is varied. At high temperatures
the conductance changes to the usual Coulomb oscillations type. In the
intermediate temperature region, the degree of the coherency of each orbital
channel is different, so strange behaviors of the conductance can appear. For
example, the conductance once increases and then decreases with temperature
decreasing when it is suppressed at T=0 by the interference cancellation
between different channels. The interaction effects in the quantum dot systems
lead the sensitivities of the conductance to the temperature and to the gate
voltage.
