The System Administrator has set policies to prevent this installation (VMWare Server 2 ) 
原文:http://communities.vmware.com/thread/157874

We had the same issue. The only thing that solved it was to follow these steps:



1. Click Start > Control Panel

2. Open Administrative Tools

3. Open Local Security Settings

4. Click Software Restriction Policies

5. If no software restrictions are defined, right click the Software Restriction Policies node and select New Software Restriction Policy

6. Double click Enforcement

7. Select "All users except local administrators"

8. Click OK

9. Reboot the machine



[ 發表回應 ] ( 50預覽 )   |  常註連結  |   ( 3 / 636 )
How to Clean /var/adm/wtmpx? 
wtmpx is solaris Login Record.

The following is safety clean up this file.

# cat /dev/null > /var/adm/wtmpx


[ 發表回應 ] ( 9預覽 )   |  常註連結  |   ( 2.9 / 589 )
Warning: CPU0: Failed to update microcode from version 0x??? to 0x??? 
原文:http://communities.vmware.com/thread/135066

This is because the Operating system is trying to update the processor's microcode with the new version. Since it is an Virtual OS, VMware doesnt allow it to update the code. To over come this issue. There is an work around for Solaris Operating system. Run the command given below



#mv /platform/i86pc/ucode /platform/i86pc/ucode.disabled



[ 發表回應 ] ( 55預覽 )   |  常註連結  |   ( 2.9 / 561 )
Nomad XR4000 battery balancing circuit 
原文:http://users.cecs.anu.edu.au/~luke/xr4000batbal.html

Nomad XR4000 battery balancing circuit


The nomad XR 4000 robot has four lead acid batteries in series. The problem is that even with batteries from an identical batch, minute differences between the batteries makes them charge unevenly.

To combat this problem we made the following battery balancing circuit.

The problem is that batteries that are charged has a potential of over 13.8 volts, while other batteries have potentials of only 10 volts and don't get charged. One circuit is placed in parallel with each of the batteries.

If the potential across the battery is lower than 13.8 volts, the circuit does nothing, if the potential raises above 13.8 the transistor starts to switch on placing the resistor in parallel with the battery until the potential is pulled down to 13.8. You can think of it as a glorified zener diode, with a lot sharper on elbow on the voltage vs current curve, the LM431 is a tunable zener diode. A potentiometer allows you to set the ~13.8 volt on/off point for the circuit. We set the pot. using a variable workshop supply to just start to turn on at 13.8 volts (you'll see the current drawn go way up when it does).



Because of the potential worst case scenarios for the system the resistor and transistor have to be rated quite highly. In reality though the resistor and transistor rarely get warm.



The circuit has been in the robot for over two years and the batteries have not had to be replaced or charged on separate chargers since.





[ 發表回應 ] ( 65預覽 )   |  常註連結  |   ( 3 / 600 )
開關式穩壓電源的工作原理 
http://hi.baidu.com/diydz/blog/item/81c ... 93548.html

[ 發表回應 ] ( 8預覽 )   |  常註連結  |   ( 3 / 609 )

<< <前一頁 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 下一頁> >>