This paper studies the distributed cooperative H ∞ control problem of multiple high-speed trains with input saturation constraints, external disturbances and nonlinear running resistance. Based on the local information, a new distributed control algorithm is proposed for each train to enable all trains to move in a stable mode while tracking a desired velocity. To attenuate the effects of external disturbances on the cooperative control, the H ∞ control technology is used and some sufficient conditions are then obtained to guarantee that the cooperative control under a desired performance is realized. Finally, simulations are provided to show the effectiveness of the results. INDEX TERMSCooperative control, multiple high-speed trains, distributed H ∞ control, input saturation, nonlinear running resistance.

The increasing importance of sustainability gives rise to the sustainable supply chain management (SSCM). To help organizations develop their SSCM capabilities with IT support, this paper proposes an ITenabled sustainability supply chain management capability maturity model (SSCM CMM). Based on the previous literature, seven SSCM capabilities and four IT dimensions are identified. A five-level maturity model is then defined based on these two domains. The model is preliminarily examined through an in-depth case study with an Australian company. The case study reveals that the role played by IT is not fully recognized, the integration of IT function for sustainability into other organizational functions should be appropriately guided, and sustainability innovation capability deserves more attention. This study guides future research to systematically explore the role of IT and investigate the progression of ITenabled SSCM implementation and provides a useful tool for organizations to develop their SSCM capabilities with the support of IT.

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Steam turbines play a vital role in the power industry. The efficiency of the steam turbine can be improved by reforming the flow structure. For the White cascade, a parallel channel which is an additional steam passage was designed to connect adjacent steam flow channels. In view of the steepening and sensitive characteristics of the steam condensation parameters in the White cascade, the two-fluid model was applied to study the condensation and aerodynamic characteristics of the prototype cascade and the modified cascade. Wetness losses were regarded as the evaluation standard, and the optimum design of the parallel channel was obtained. The influence of channel width was also studied. The location of the suction surface (D point) has great influence on the dehumidification performance of the cascade. On the contrary, the location of the pressure surface (C point) has no significant effect on dehumidification performance. Moreover, it is necessary to select the width of the parallel channel in combination with the cascade performance. It is suggested that the parallel channel width should be between 3 and 5 mm. The research results can provide a reference for the optimal design of a turbine stator cascade.

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