HIV/STI prevalence is high among FSWs and moderate among clients in mining regions of Gejiu City. Drug use is the most important factor placing FSWs and miner clients at risk for HIV in Gejiu City; risky sexual characteristics such as early sexual debut, frequent visits to FSWs, and STI symptoms are also important factors for miner clients. FSWs and miner clients may constitute bridging groups for HIV to low-risk populations.
The supercharged boiler drum level as the controlled object, a high-precision simulation model was established considering the impacts of the distribution of the metal wall condensation inside the drum on the water level changes. Based on simulation model, a simulation program for pressurized boiler was prepared. The simulation results show that the performance of the state fuzzy controller is better than the PID controller.
In this paper, the mathematical model for the rapid steam-charging process of the steam accumulator was given based on the theory of equilibrium thermodynamics. The dynamic process has been simulated according to the model, and the effects of different factors on the steam-charging process were analyzed. The results showed that the initial coefficients of filling water had great influence on the time of steam-charging, and the influence of the considered metal’s mass was limited for the steam-charging process.
In this paper, we propose an improved self-adaptive GA PID and compare it with traditional GA PID in simulation. This research indicates that improved self-adaptive GA PID can reduce system’s overshoot and regulation time and perform effectively.
The traditional genetic algorithm was improved, and the marine steam power plant main steam pressure control was as an object, the improved genetic algorithm controller and the traditional genetic algorithm controller is studied by the simulation. The simulation results show that the improved genetic algorithm controller system can effectively reduce the overshoot and adjustment time of main steam pressure.
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