大约一半的习题有答案，取二或三位有效数字。
Answers are provided to about half the problems, and are rounded off to two or three significant figures.
四十年前，光谱学的测量结果最多能保持六到七位有效数字。
Forty years ago, spectroscopy measurement results were given with six or seven digits at most.
通常，从右到左排列，最右边的数字是最低有效位。
Usually, you order them from right to left, with the right-most digit being the least significant digit.
使用生成包含有效原区号的随机SSN(前3位数字)的算法。
Use the algorithm that generates a Random SSN with a valid source area number (first 3 digits).
最后的23位表示尾数（有时称为有效数字），其值的范围是0到 33,554,431。
The final 23 bits hold the mantissa (sometimes called the significand), which ranges from 0 to 33,554,431.
删除或丢失。例如，丢失位，丢失有效数字。
To delete or miss out; for example, drop bits, drop significant digits.
基于高有效位的数字计算方法和误差估计方法，对目前已提出的基于切比雪夫映射的公钥加密方法进行了改进，得到一种密钥协商协议。
Based on high effective locations algorithm and error estimate, improvement of the public-key scheme based on Chebyshev maps proposed recently was presented and a key agreement protocol was given.
在灰度图像中的数字水印中，空间域方法只能用在LSB（最低有效位）的局限性，同时，实验表明对常规攻击具有较好的识别能力。
The limit that space domain only be applied in LSB under gray image of digital watermark was changed. Then, experiment showed that the method have a better adaptability to normal attack.
前两位数字为有效数字，后一位数字表示零的个数。
The first two digits are significant, and the third digit is number of zeros.
允许消去答数中最低有效数字位以下的全部数字位的功能。
The function that allows the elimination in the result of the calculation of all digits beyond the least significant digit.
对系统进行的性能测试表明其有效位数为6位以上，满足实际应用的需要，适用于高速数字信号处理领域。
The performance test results show that the ENOB is more than 6 bits, which satisfies the application requirement. The system can find applications in the field of high-speed digital signal processing.
实验四频率计实验要求：设计一个有效位为4位的十进制的数字频率计。
Experiment iv Cymometer experimental requirements: design of an effective place for the 4 decimal digital frequency meter.
实验四频率计实验要求：设计一个有效位为4位的十进制的数字频率计。
Experiment iv Cymometer experimental requirements: design of an effective place for the 4 decimal digital frequency meter.
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