HB仿真时出现问题

Warning detected by hpeesofsim in topology check during circuit set up.

Number of nodes with only one device attached (topology corrected): 6

    Number of nodes with no DC path to ground (topology corrected): 4

Warning detected by hpeesofsim during HB analysis `HB2'.

The global circuit temperature and the IEEE standard noise temperature

    (290 Kelvin) do not agree in the spectral noise analysis `HB2'.  The

    `Temp' parameter on the Options item can be set to 16.85 Celsius

    to eliminate this warning message.  If the circuit temperature is

    different from the IEEE standard temperature the loss and the noise

    figure might not agree.

我用的是2011版的ADS，上面问题该怎么解决呀

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