11 research outputs found
Research on Travel Control System of Hydrostatic Transmission Chassis
Aiming at the control problem of driving system of hydrostatic transmission chassis, the composition of the control system of hydrostatic transmission chassis is introduced and the control method of dual engine is solved. According to the number of driving axles in driving process, The external characteristic curve of the engine controls the variable hydraulic pump by one parameter, controls the rotational speed of the variable hydraulic motor according to the change of the vehicle speed, and introduces the control flow of the brake system. It provides a reference for the design of driving control system of multi-axis hydrostatic transmission chassis
Palladium Nanoparticles Anchored on Amine-Functionalized Silica Nanotubes as a Highly Effective Catalyst
The catalytic performance of supported
heterogeneous catalysts
is mainly dependent on their constitutive components including active
species and supports. Therefore, the design and development of effective
catalysts with synergistic enhanced effect between active sites and
supports is of great significance. A facile in situ reduction approach
to prepare amine-functionalized silica nanotubes (ASNTs)-supported
Pd (ASNTs@Pd) composite catalyst is demonstrated in this article.
Benefiting from the intrinsic physical and chemical properties of
the ASNTs support and deposited Pd nanoparticles (NPs), the as-prepared
ASNTs@Pd catalyst exhibits superior catalytic activity, stability,
and reusability toward nitroarene reduction reactions. For catalytic
reduction of 4-nitrophenol, the turnover frequency (TOF) is as high
as 313.5 min<sup>–1</sup>, which is much higher than that of
commercial Pd/C (5.0 wt %) and many noble-metal based catalysts reported
in the last 5 years. In addition, a high TOF of 57.4 min<sup>–1</sup> was also realized by ASNTs@Pd catalyst for the Suzuki coupling reaction