Design of New Oscillograph Based on FPGA

AbstractOscillograph is one of the necessary measurement instruments in modern electronic design field. A new type of Oscillograph based on FPGA is proposed and designed in this paper. It consists of oscillograph, logic analyzer and signal generator. The resolution of the oscillograph is 8 bit and the maximum value can reach 200Mbps with support of software based on windows operation system. That of the logic analyzer is 100 Msps with 16 channels. The resolution of signal generator is 140Msps with 10-bit

Design of New Oscillograph Based on FPGA

AbstractOscillograph is one of the necessary measurement instruments in modern electronic design field. A new type of Oscillograph based on FPGA is proposed and designed in this paper. It consists of oscillograph, logic analyzer and signal generator. The resolution of the oscillograph is 8 bit and the maximum value can reach 200Mbps with support of software based on windows operation system. That of the logic analyzer is 100 Msps with 16 channels. The resolution of signal generator is 140Msps with 10-bit

Research on the Construction of Chinese Song Hierarchical Database Oriented to Chinese Teaching

As a critical auxiliary method in teaching Chinese as a foreign language, Chinese songs have the characteristics of a strong sense of rhythm, extensive vocabulary, and rich cultural knowledge. Previous studies have mostly discussed the use of Chinese songs in Chinese teaching from the perspective of teaching methods, teaching experiment design and textbooks. There is no specific research on the construction of a database of Chinese song ratings for Chinese learners of different levels. Based on Internet resources, this study collected 9098 Chinese song lyrics and built a database. Based on the analysis of the characteristic data in the database and the method of building a vector space model, four songs of different difficulty levels were divided, which was respectively targeted at Chinese learners of different levels. This research can reduce Chinese teachers 'lesson preparation time and improve teachers' teaching efficiency

NUMERICAL AND EXPERIMENTAL STUDY ON RESISTANCE OF ASYMMETRIC CATAMARAN WITH DIFFERENT LAYOUTS

It is meaningful to study the wave-resistance reduction of an asymmetric catamaran because of interference effects between the two sets of ship-generated waves. The influence of lateral separation and longitudinal stagger on the resistance and the wave interference are analyzed within this paper. Numerical calculations of resistance, sinkage and trim of the asymmetric catamaran are carried out for several Froude number ranging from 0.24 to 0.48, for six different lateral separations and four longitudinal staggers. Verification of numerical results is provided. The model tests are then carried out for three stagger distances to validate the numerical results. Results of this study indicate that the wave-resistance can be effectively reduced by certain hull layouts at different Froude numbers