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This paper analyzes the overall change trend of the research on the education of socialist core values of college students by sorting out the literature data of CNKI on the education of socialist core values of college students. It is found that the number of research results showed an upward trend before 2015, peaked in 2015, and then began to show a downward trend. By sorting out the frequency of key words, analyzing the distribution of the research content and the source journals of the research results, it is found that the main source of the research results is journals, and the proportion of core journals is low. On this basis, this paper summarizes the deficiencies and possible theoretical growth points of the socialist core values education research of Chinese college students.

This paper describes new configurations of digital-to-analog converters (DACs) based on number theory: (i) DACs consisting of N current sources, N-angle number weighted resistor networks, switch arrays and decoders (N= 3, 4, 5,…). (ii) A DAC composed of two current sources, a prime number weighted resistor network, switch array, a decoder; this is based on Goldbach's conjecture in the number theory. Their principles, configurations and operations are presented.

This paper describes number theory and analog/mixed-signal IC design, to make an attempt to establish the unified methodology of analog /mixed-signal IC design. First our five research results of ADC, DAC and sampling system design based on Fibonacci sequence theory as well as DAC, TDC design based on number theory are reviewed. Then we examine the statement that Fibonacci sequence and golden ratio lead to well-balanced redundancy of analog/mixed-signal IC design.