This paper introduces a new kind of toolcoupling based electro-hydraulic system development method including designing character-oriented electrohydraulic system development and design procedure, cosimulation based system coupling strategy, client-server model management method. An integrated development platform is designed for co-simulation among AMES im, Matlab\S imulink, Flowmaster, Saber and S implorer. The platform can manage each simulator's models and cosimulation procedure. The result illustrates tool coupling based electro-hydraulic system development method can improve the efficiency of multi-team collaborative design for electro-hydraulic system and also can analyze and evaluate the performance of integrated electro-hydraulic system at the initial stage of the design procedure.
In this paper, we present a new method of modeling the hybrid external gear pumps based on Modelica and assess it experimentally. We model the whole working process of an external gear pump. The chamber of the pump is divided into a set of Control Volumes (CVs), whose effective volumes change along with the rotation of the gears. The CVs take in fluid from the inlet port and squeeze fluid out at the outlet port. The whole model of the pump also takes into account flow ripple, pressure distribution, leakages, meshing conditions, etc. Details of each component of the whole pump are provided. From the pressure distribution in space of the gear tooth, we can calculate radial force on shaft, based on which the shaft motion can be simulated. We carry out a set of predictions in MWorks and report some results on the post processing. These results are consistent with those from the experimental data.
Using the ARIMA time-series analysis technique, this study measured the impact China’s anti-corruption campaign had on Macau’s casino gaming industry and forecasted future gaming revenue. This study also analyzed current trends and proposed future strategies for the Macau tourism and gaming industry. The results suggest China’s anti-corruption campaign did not significantly affect Macau’s non-VIP gaming revenue. Instead, the campaign has triggered positive changes for Macau’s tourism and gaming industry by transforming it from an unbalanced development model relying solely on VIP business to a diversified healthy development, which would potentially bring positive impact to Macau’s overall economy in the future. The findings of this study echo the revisions of gaming laws proposed by the Macau Special Administrative Region Government in September 2021 and provide new insights into the impact of the anti-corruption policy with focus on the outlook of Macau’s tourism and gaming industry.
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