Cardinality: the number of digital symbols selected in the exponential system, and the number system based on R is called R system. The r system has 0 ~ (r- 1) * * r number symbols, and the carry rule is "one for every r", and "ten" means r.
Bit weight: refers to a fixed constant, which is used to indicate the size of different digits in the number represented by the carry counting system. Different numbers have different bit weights, and the value of a number is equal to the digital symbol of this number multiplied by the corresponding bit weight. The bit weight of a decimal number is an integer power of R. For example, the bit weight of a decimal number is an integer power of 10, its bit weight is 10, and its bit weight is 10+0 …