The water supply process is approximately a system of time lag of first order, real time control of pressure in pipe is adopted self-tuning fuzzy PID.

由于供水过程可近似认为是一个一阶时滞系统，系统采用了自整定模糊pid对管网的压力进行实时控制。

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According to operating heat pump process and the water supply process, the experiment is aim to find out how the cascade heat pump work which combined with the PCM.

本文试验研究复叠式蓄热型空气源热泵热水器蓄热和放热过程，探讨热泵系统循环和相变蓄热的耦合。

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In the water supply process, the turnover temperature of the PCM appeared two minutes later than the water temperature on the height, which indicates that the PCM has the features of time delay.

在放热过程中，蓄热材料温度变化拐点值比同高度的水温拐点值的出现慢2分钟，说明相变蓄热材料具有延时性。

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We constantly underestimate the role of wetlands as basic water management elements within the supply and regulation process upon which humanity depends.

UNESCO: MEDIA SERVICES

But councillors in Bath fear the water courses which supply the springs in the World Heritage city could be contaminated by the process, or that water could change direction through new fractures in the rock.

FORBES: Not a Good Argument Against Fracking

Local residents have expressed concern that the process - known as fracking - could lead to the contamination of the water supply.

BBC: Keynsham fracking plans put on hold by UK Methane