In mathematics, the sign function or signum function (from signum, Latin for "sign") is a function that has the value −1, +1 or 0 according to whether the sign of a given real number is positive or negative, or the given number is itself zero.

2019年2月4日 · UI Definition - Method of determining how consistent granule diameter (SGN) is within a volume (bag) of granular fertilizer. Formula to calculate UI is = D 10 /D 95 X 100 Where D 10 = grain diameter (mm) corresponding to 10% passing and D 95 = grain diameter (mm) corresponding to 95% passing.

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The Sylvite SGN Scale is an instrument designed for simple screen tests of fertilizer samples. It is a small Plexiglas box fitted with five sieves. It directly produces a size histogram of the sample tested, from which the Size Guide Number (SGN) can be estimated.

高等数学中sgn这个符号表示x的符号函数，返回一个数的正负。 sgn是sign的缩写。 sgn的定义如下： x>0，sgnx=1。 x=0，sgnx=0。 返回值如果数 大于0，则Sgn 返回1，等于0，返回0，小于0，则返回-1参数的符号决定了Sgn 函数的返回值即x>0，sgnx=1，x=0，sgnx=0。 扩展资料. 高等数学中的其他符号： 1、数学符号“+”号是由拉丁文“et”（“和”的意思）演变而来的。 2、“-”号是从拉丁文“minus”（“减”的意思）演变来的，一开始简写为m，再因快速书写而简化为“-”了。 3、“-” …

sgn是阶跃函数，数学上的 符号函数 或者 计算机语言 中的返回函数。 Sgn 函数 返回一个 Variant (Integer)，指出参数的 正负号。 返回一个整型变量，指出参数的正负号。 语法Sgn (number)， number 参数是任何有效的数值表达式。 返回值 如果数字大于0，则Sgn 返回1，数字等于0，则返回0，数字小于0，则返回-1，数字参数的符号决定了Sgn 函数的返回值。 实质：函数 f (x)=sgn (x) 相当于 g (x)=abs (x)/x 或 h (x)=x/abs (x) （当x不为0时）。 扩展资料. 阶跃函数可以方便地表 …

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Sgn 函数. 返回表示数字符号的整数。 Sgn(number) number 参数可以是任意有效的数值表达式。 返回值. Sgn 函数有如下返回值：

SGN (previously Scotia Gas Networks) is a British gas distribution company. It manages natural and green gas distribution networks in Scotland and in the south of England. [2] As of 2014/15 SGN operates more than 44,000 miles (71,000 km) of pipes. In the same period, SGN spent £500 million on upgrading the network. [3]