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The purpose of this paper is to recover the waste heat of flue gas heat exchanger (FGHE) as efficiently as possible and avoid the acid dew corrosion of that.

A novel flue gas waste heat recovery system was proposed in the paper. The dynamic mathematical models of key equipment in that were established based on theory and experiment method. The proportion integration differentiation-differentiation (PID-P) cascade control method based on particle swarm optimization algorithm was used to control the outlet temperature of FGHE. The dynamic characteristics of the flue gas heat exchange system were simulated by the particle swarm optimization algorithm with different fitness functions.

The PID-P temperature controller parameters can be quickly and effectively obtained by the particle swarm optimization algorithm based on the fitness function of integral time absolute error (ITAE). The overshoot, rise time and adjusting time of the novel system are 2, 83 and 105s, respectively. Compared with the traditional two-step tuning (T-ST) method, the novel system is better in dynamic and steady-state performance. The overshoot and the adjustment time of the system are reduced by 44% and 328s, respectively. ITAE is a performance evaluation index for control system with good engineering practicability and selectivity.

The dynamic mathematical model of key equipment in the new flue gas waste heat recovery system is established and the system's control strategies and methods are explored.

The authors investigate when and why a subordinate's expressive suppression facilitates workplace creativity, building on the conservation of resources theory and considering the effect of the supervisor's expressive suppression and time pressure as boundary conditions.

Multisource data were collected from 132 teams in northwestern China, including 132 supervisors and 648 subordinates. Hierarchical regression analyses were used to test the effects.

The subordinate’s expressive suppression was positively related to their workplace creativity. Challenge time pressure was positively related to workplace creativity, and the subordinate’s expressive suppression was positively related to workplace creativity when challenge time pressure was lower and the supervisor's expressive suppression was higher. Hindrance time pressure was negatively related to workplace creativity, and a positive relationship between a subordinate's expressive suppression and workplace creativity was also found with less hindrance time pressure and greater expressive suppression by their supervisor.

By examining the role of the supervisor as a source of downward spillovers in various time pressure contexts, the study explains why a subordinate’s suppression facilitates workplace creativity from the conservation of resources perspective.