Phosphoryl chloride was able to promote the formation of peptide and the ringopening of tetrahydrofuran (THF) followed by a sequence of successive reactions by simply refluxing. ESI multistage tandem mass spectrometry was applied to trace the reaction and elucidate the product structures, dipeptide 4-chlorobutyl ester.

Proposed wheeled off-road excavator with 2-Dof articulated body, and analyzed the working principle of the 2-Dof articulated body, machine-hydraulic drive system and the key technologies .Through the study of the vehicle drive system matching calculation and the ADAMS simulation of articulated body, the results show that the articulated truck has good passing ability, stability and adaptability on a complex road.

Detailed analysis of the mechanism of truck crane, establishes a co-simulation model of the telescopic system with the software of AMESim and Virtual.Lab motion, and conducts a serious of experiments. The performance of Truck crane telescopic system is learned through the comparative analysis of the simulations and experiments. The result shows that this co-simulation can simulate the actual work of the telescopic system well.