A bootstrap MOS circuit is introduced for bias, which shows a good performance in power supply reject ratio.

偏置电路采用自举基准源，具有良好的电源抑制比。

The application of this system reduce handlers work intensity, and remarkably reduce reject ratio and returning rate, and enhance welding productivity.

系统的应用，降低了操作者劳动强度，显著降低了废品率和返修率，提高了焊接生产率。

According to the properties of signal and noise, we detect the weak laser pulse signal using the technique of correlation detection to reject noise and enhance signal-to-noise ratio.

根据信号的相关性和噪声随机性的特点，处理信号，抑制噪声，提高信噪比。

We use variance-ratio methodology to test the hypothesis that stock return follows a random walk. But the results of variance-ratio tests reject the random walk hypothesis in China.

使用方差比方法检验中国股票市场上股票收益服从随机游走的假设，检验结果拒绝了该假设。