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In this paper, we propose an improved least square(LS) channel estimation algorithm for the aeronautic broadband mobile communication system due to the complication and fast-variation characteristics of its channel. The algorithm reduces the noise and improves the accuracy of channel estimation by dynamically adapting the number of zero-forcing noise coefficients in the channel coefficients estimated...
The L-band Digital Aeronautical Communication System Type-1 (L-DACS1) has been considered as the potential standard for future aeronautical communications. As an important technique for L-DACS1, Automatic Modulation Classification (AMC) can recognize and demodulate the dynamically allocated signal in the system. However, due to the interference of Distance Measure Equipment (DME), performance degradation...
This paper introduces a new-type turbine flow meter. The concept is to apply magnetic suspension bearing to reform turbine flow meter. Beginning with the structure and working principle of magnetic suspension bearing, the magnet suspension bearing is compared with the common bearing in their differences and characteristics. To draw a conclusion from the comparison that the turbine flow meter based...
This paper introduces the composition of embedded video monitor system based on ARM9 S3C2440 microprocessor, It discusses the basic elements of the system and the principle, It focus on the hardware composition and the methods of realization about software modules. The system saves the hardware cost for using the compression algorithm.
This paper introduces an intelligent roots flow meter based on ARM Cortex-M3 processor and μC/OS-II embedded real-time operating system. ARM Cortex-M3 processor is an industry-leading 32-bit processor with lower power consumption and higher performance than other 8-bit or 16-bit processors. Using the μC/OS-II embedded real-time operating system, it will compensate the temperature and pressure of the...
This paper introduces the development situation of the industrial design through the application of virtual reality technology to realize the innovation of industrial product design. We learn the virtual reality technology in design of industrial products with cerebrovascular therapeutic and realize the important role of industrial product design.
This paper will present an intelligent turbine flow meter based on processor MSP430F149. By making full use of a single chip's ability to calculate and control, the instantaneous flux and the accumulative flux can be displayed instantly on LED display using serial data transfer. In addition, the parameters of the flow meter can be set to accommodate pipes with different calibers to improve precision...
This paper presents a novel method for fluid flow measurement in pipes. The method concept is to apply magnetic suspension bearing to a turbine flow meter and thus improve the measurement performance. Under design conditions, the turbine flow meter based on magnetic suspension bearing (MSB) has better linearity and repeatability than the one with ordinary bearings. Test results show that the lower...
According to the facts that mechanical roots flow meters are widely applied for natural gas flow measurement, an intelligent flow totalizer based on zero power pulse sensor is developed in this paper. The flow totalizer is designed based on MSP430 single chip microprocessor (SCM) coupled with advanced electronic circuit and software, and developed into an intelligent head with multi-functions and...
The objective of this study was to detect interspecific and intraspecific genetic variations of the second internal transcribed spacer of ribosomal DNA (ITS-2), and explore the feasibility of using it as a molecular marker phylogenetic analyses and species identification among pearl oysters. ITS-2 sequences of 6 pearl oysters were amplified via polymerase chain reaction. The amplified DNA fragments...
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