数字信号处理数字信号常用数学符号及一些数学式的读法.doc

常用数学符号及一些数学式的读法 a half 或one half 常用数学符号及一些数学式的读法 two thirds a quarter或 one quarter; a fourth或one fourth a tenth或one tenth a [ten] hundredth one over a thousand two hundred and thirty-four two and a half 0.1 (及.1) O point one 或 zero point one 或nought point one 0.045 decimal [point] nought four five three point nought three two six ,two six recurring four five [forty-five] point six seven 0.001(及.001) O point O O one 或nought point nought nought one 或zero point zero zero one或point nought nought one plus ; positive minus ;negative plus or minus minus or plus (及 ) multiplied by; times divided by = is equal to ;equals is identically equal to (及 ) is approximately equal to; approximately equals ( ) round brackets; parentheses [ ] square [angular] brackets { } braces intersection union is a member of set is a subset of ~ difference denotes an operation is equivalent to implies therefore because 或 imaginary 或 square root of -1 或 the imaginary cube roots of 1 pi; the ratio of the circumference of a circle to its diameter ,approx. 3.14159 或 ① the basic of natural logarithms ,approx. 2.71828 ②the eccentricity of a conic section to the base to the base 10 (即common logarithm) 或 to the base (即 natural logarithm或Naperian logarithm ) to factors; the th power of , to the power 或 the th root of, to the power one over (the principal values of the angle whose sine is )arc sine of sinus hyperbolicus ,the hyperbolic sine the sum of the terms indicated; summation of ;sigma the product of the terms indicated the absolute value of the mean value of ; bar prime sub m dot 或 function function f (或) of is a function of 或 (the increment of )delta (an increment of considered as tending to zero) dee of ; dee ; differential 或 the differential coefficient of with respect to ; the first derivative of wit