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Due to double reheat and using cross-level superheat with outer steam cooler, the thermal economic analysis of double reheat supercritical plant is far more different from once reheat unit, so it brings some obstacles to the former one's energy-saving analysis. For this reason, pure heat conversion coefficient, which is one important parameter for double reheat unit, is defined, and its general matrix...
This paper presents a detailed design of GPS signal fast acquisition system using the method of extended multiple correlator in FPGA. A 12-channel GPS signal acquisition system is implemented and an extra noise-monitoring channel is used to provide an adaptive threshold. Programming the system on FPGA development platform, results show that the system can acquire GPS signals faster than traditional...
The mobile communication systems services are shifting from voice conversation to data transmission through the Internet. The information transferred over the Internet is becoming increasingly rich, there will be a demand of peak data transmission rates of around 100 Mbps-1Gbps even in mobile communications systems. However, as the data transmission rate becomes higher, the peak transmit power becomes...
General acquisition algorithms for GPS signals in time domain and frequency domain have some advantages and disadvantages. A new modified averaging circular correlation algorithm based on FFT is proposed and its realization process is given in this paper. Compared with the general algorithms its performance is improved. This novel algorithm is demonstrated using actual sampling data of GPS signals...
Polarimetric scattering mechanisms of ocean surface are important for improving ocean surface scattering model and detecting objects on the ocean surface, especially at large incidence angles and wave breaking. We proposed polarimetric parameters technique to analyze the scattering mechanisms of ocean surface. Lacks of the related data, we only analyzed the variances of polarimereic parameters with...
Automatic Identification System (AIS) is a system that enables ships to exchange static and dynamic information about ships and navigation, such as position, course, name etc., automatically by VHF radio. GPRS monitoring system can trace, dispatch and navigate ships by GPRS network. They are the two main ways of monitoring the ships. However, the two systems are independent of each other with the...
This paper describes how to optimize the winding structure of LSPM with FEM, which includes the determination of turns ratio of the main and auxiliary windings, and the selection of capacitor. The motor can be optimized on the ground of the rough value of the windings ratio and the capacitor. The winding structure of the LSPM motor is very essential to form circular field, which is also of great importance...
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