Structure optimization and mechanical study on lifting mechanism of the multifunctional car transporter.

In order to realize the multifunctional purpose, the rear column of the car transporter is replaced by a lifting mechanism which can be regarded as a four-bar mechanism. However, for the multifunctional car transporter, lifting difficulty and lifting lock occur shortly after the beginning of lifting. Dynamic analysis of the lifting mechanism is carried out, and the computational results reveal that the unreasonable structure of the lifting mechanism is the main reason for the above problems.

[VOCs analyzing and odor indicator selecting in ambient air of landfill area].

The odor pollution of landfill is one of seriously pollutions in city ambient area. Main pollution points in the landfill area have been detected by preliminary research. For a particular purpose to recover the materials changing in odor dispersion process and to find out odor indication material, GC-MS method was used to detect materials in the different site at down wind direction.