A novel adaptive fuzzy logic controller (AFC) based on an interval type-2 fuzzy controller is proposed for vehicle non-linear active suspension systems. The adaptive strategy elicited from the least-mean-squares optimal algorithm is adopted to self-tune lower bounds and upper bounds of interval type-2 fuzzy membership functions (IMF 2 s). The IMF 2 s are utilized in the AFC design to deal with not only non-linearity and uncertainty caused by irregular road inputs and immeasurable disturbance, but also the potential uncertainty of experts knowledge and experience. A case study based on a quarter-vehicle active suspension model has demonstrated that the proposed type-2 controller significantly outperforms conventional fuzzy controllers of an active suspension and a passive suspension.

Hydrogen sulfide reacts with the corrosion products (Fe 2 O 3 ) in oil tanks to form iron sulfides. The oxidation and released heat of iron sulfides can lead to spontaneous combustion of iron sulfides and fire of oil tanks. In this article, the simulating production process of iron sulfides in oil tanks and the effects of flow rate of hydrogen sulfide, environmental temperature and setting time on the quantities and types of iron sulfides are studied.

An extended fuzzy logic controller (EFLC) based on interval fuzzy membership functions is proposed for a vehicle active suspension system. With the degree of uncertainty in fuzzy membership functions, interval fuzzy membership functions are self-generated to cover more general uncertainties which occur from understanding linguistic knowledge and fuzzy rules in typical fuzzy methods. A novel adaptive strategy is designed to self-tune the interval fuzzy inference and to deduce the crisp outputs with feedback structure. A simulation study on a half-vehicle active suspension system has demonstrated that the proposed EFLC outperforms a conventional fuzzy logic controller.

Rust formed by corrosion on the inner surfaces of oil tanks can react with humidity-saturated hydrogen sulfide. The reactions produce pyrophoric ferrous sulfide and can cause fire and explosions when exposed to air during production or maintenance. Water content has an important effect on both the formation and the pyrophoricity of ferrous sulfide and the effect was investigated in detail in this article. The experimental results showed that water is involved in oxidation reaction of ferrous sulfide and enhances the pyrophoricity, making ferrous sulfide more dangerous and able to easily cause fire or explosion accidents.