事实上，由于其成本低，基于PLC的系统具有高得多的需求比连续值控制系统。
In fact, due to its low cost, the PLC-based system has a much higher demand than the continuous-valued control system.
计算中，在连续方程中增加了一个松弛项，将模式结果向已有实测调和常数的控制点推算潮高值趋近。
A relaxation term is added to the continuity equation to nudge the calculated sea levels to the sea levels predicted at gauging stations.
这种直接数字式频率合成技术(DDS)具有频率值转换速度快、频率值分辨率高、控制频率的相位值连续等优点。
The technology of DDS has many values, such as the speed of hopping frequency is very high, the resolving power of frequency is also high.
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