Two signals from the mass flowmeter are filtered by no change of phase, and the phase difference is given by zero passage arithmetic.

两路信号数据采集后使用了无相位变化的滤波方法，通过过零点算法计算出得出相位差。

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Before the design of digital circuit, measurement method of phase difference is discussed. Two-way zero passage phase detector is chosen as solution finally.

在正式进入数字电路设计之前，先讨论了相位差测量方法，并选定双向过零鉴相作为实现方案。

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The Obama administration also saw the passage of the Small Business Job Act, which provided additional small business tax cuts, zero capital gain taxes on important small business investments held for five years or more, deduction for self-employed health insurance costs and increased access to lending for small business owners.

FORBES: Do the Presidential Candidates' Platforms Address the Real Needs of Small Businesses?