By using the WKBJ method, the average of currents and square of the current are calculated, the results show the existence of the current fluctuation, which causes the noise in the circuits.

运用WKBJ方法计算了电流平均值和电流平方的平均值，计算结果表明电流涨落是存在的，它是介观电路中主要的量子噪声。

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By using this shaping system, the square laser pulse is obtained and the fluctuation is less than 10%.

通过这套利用集成光学调制技术的整形系统，得到了脉冲起伏小于10 %的整形方波光脉冲。

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Using these formulas and a 1-d LDA, mean square value of 2-d turbulent velocity fluctuation and Reynolds shear stress have been measured for water flow in a square duct.

用这些公式和一台一维激光多普勒测速计，测量了方形管道中水流的二维湍流速度脉动的均方值和雷诺切应力。

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