significand中文什么意思

有效数

有效位数

例句与用法

1. The internal representation of a floating - point number , including the format and precision of the significand and the format and range of the exponent , is implementation defined
   一个浮点数目的内部表示法,包含格式和有效的精确度及格式和指数的范围,是实作自订的
2. All sse single - precision operations will , however , use a 24 - bit significand 8 - bit exponent , and sse2 double - precision operations will use a 53 - bit significand 11 - bit exponent
   但是，所有sse单精度运算都将使用24位有效数/ 8位指数，而sse2双精度运算将使用53位有效数/ 11位指数。
3. To modify the fp control word , then the run - time startup code will set the x87 fpu control word precision - control field to 53 - bits , so all float and double operations within an expression will occur with 53 - bit significand and 15 - bit exponent
   修改fp控制字，则运行库启动代码会将x87 fpu控制字精度控制字段设置为53位，这样，表达式内的所有浮点运算和双精度运算都以53位有效数和15位指数进行。

百科释义

The significand (also coefficient or mantissa) is part of a number in scientific notation or a floating-point number, consisting of its significant digits. Depending on the interpretation of the exponent, the significand may represent an integer or a fraction.