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In this paper, we investigate the impact of different parameters on channel characteristics in a high-speed train (HST) ray tracing tunnel channel model. Signal propagation in HST tunnel scenarios differs much from that of other HST scenarios due to the unique construction of tunnels. Ray-tracing method is applied to analyze the received power and power delay profile (PDP) of tunnel channel models...
Flexible HVDC technology has got widespread concern in the world and has a broad application space in the fields of large capacity clean energy connecting and power grids interconnection. In this paper, the application status and technical advantages of flexible HVDC technology were summarized, the system structure and control strategy of flexible HVDC were studied. The direct current control methods...
In this paper, in order to solve the path-following problem of underactuated surface ships, active-disturbance rejection control combining with the variable structure is proposed to steer a desired path. On the other hand, the uncertainties of internal dynamic and external disturbances can also be solved. In this way the needed setting parameters are greatly reduced with no change of the intrinsic...
This paper is concerned with the controller design for networked control systems (NCSs). A novel event-triggered networked predictive control scheme is proposed to compensate for the network-induced delay and save network bandwidth. The closed-loop system is modeled as a switched system with time-varying delay. By constructing a common Lyapunov function, a sufficient stability condition is derived...
Real-time (RT) simulation is increasingly used in power electronics and power engineering as a tool to replace actual hardware for use in the development and verification of control and complex system designs. New computing architectures and algorithms, such as parallel and distributed computing, hold the promise to meet the speed requirement of such RT simulation. Due to its inherent parallelism...
This paper evaluates the usefulness of different simulators developed in server system testing for a mobile application during 5 years, with the purpose of identifying the advantages and weaknesses of each simulation method in the given setup. The study found that simulation was used on almost every interface to external systems, and two factors that affected the usefulness of simulators over long...
According to the agricultural precision requirements, the distance from sprayer nozzles to the corps should be kept between 50 cm to 70 cm. The sprayer boom also needs to be kept parallel to the field during the application process. Thus we can guarantee the quality of the chemical droplets distribution on the crops. In this paper we design a sprayer boom leveling system for agricultural sprayer vehicles...
According to the agricultural precision requirements, the distance from sprayer nozzles to the corps should be kept between 50 cm to 70 cm. The sprayer boom also needs to be kept parallel to the field during the operation process. Thus we can guarantee the quality of the chemical droplets distribution on the crops. In this paper we introduced a sprayer boom leveling system for agricultural sprayer...
Mixed traffic is often mistakenly considered as the cause of poor traffic safety and low efficiency. Traditionally, traffic management department would extend the signal cycle length to decrease the start loss caused by frequent starts, and to satisfy the traffic demand of motor vehicles, without considering the demand of pedestrian and non-motorized vehicles. Simultaneously, calculation methods of...
The application of information technology makes it possible that transportation planning professional utilize mass detective data. The paper, according to business process reengineering theory, analyzes the effect of transportation planning operation process reengineering on transportation planning operation. The system in the paper is developed based on transportation software-VISUM, and integrates...
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