Practice has proved that the frequency conversion and constant pressure fuzzy control system has advanced technique and notable benefit? It has good application value and more research value.
实践证明：变频恒压模糊控制系统具有优越的技术性能和极其显著的经济效益，有很好的推广应用价值和进一步的研究价值。
A serial of roof sagging time and critical value, measured by field-monitoring, has provided basis for pressure control.
通过分析现场监测结果所划定的顶板下沉期及—系列临界值，为地压管理提供了依据。
Widely used for precise control of gases, liquids and other media of process parameters such as pressure, flow, temperature, liquid level maintained at a given value.
广泛应用于精确控制气体、液体等介质的工艺参数如压力、流量、温度、液位保持在给定值。
This article narrate the fundamental rule of valve control system, and propose one kind of hydraulic pressure drive valve control system scheme. Have reference value.
本文简述了阀门控制的基本原理，给出了一种液压驱动阀门的控制系统方案，具有参考价值。
The results show that the method obviously improves control accuracy and reduces the undulation of pressure and calorific value and greatly meets the demands of users.
实时控制结果表明：本方案明显提高了控制精度，减少了压力和热值波动，很好地满足了用户的要求。
The control target of the mixing and pressurizing of the gas is to ensure the stability of the calorific value and pressure of the gas.
煤气混合加压过程的控制目标是要保证送出煤气的热值与压力稳定。
Instruments based on the lower limit of two switch-contact device, the pressure to set a signal or when the value of on-off control circuit for the operating system's automatic control or the use.
仪表设上、下限二位开关型接点装置，在压力达到设定值时发出信号或通断控制电路，供作业系统自动控制或发讯用。
It can control the stepper motor to change the pressure of the relay, and the A/D circuit samples the signal of the pressure sensor and then acquires the lock or alarm value after processing.
该校验仪通过步进电机对密度继电器压力进行调节，并通过模数转换电路采集压力传感器的输出，实现对密度继电器报警及闭锁压力的测量。
Pulmonary heart disease group and COPD group, the control group of the right lower pulmonary diameter/pulmonary artery pressure value comparison, the difference was statistically significant.
肺心病组与COPD组、对照组组间的右下肺动脉直径/肺动脉压力值比较，差异均有统计学意义。
These results show that the vibration of control valve rod depends on if its frequency and one of dynamic pressure pulse is same but not the magnitude of pulse value.
测试结果表明，调节阀处于不稳定工作状态即阀杆振动工况取决于脉动压力与阀杆固频率是否同频，并非其脉动压力值大小；
The control schemes for the solvent heat exchange section include the single-loop fixed value control for the pressure in the flashing tank and that for the liquid level of the flashing tank.
溶剂换热部分控制方案包括闪蒸罐压力的单回路定值控制和闪蒸罐液位的单回路定值控制。
The actual results validate the control strategy, the gas caloric value and pressure error can be controlled in the range of 5% of their set value.
实际运行结果验证了控制策略的有效性，煤气热值和压力误差均在设定值的5%之内。
It can be said that the research work offers a new way to upgrade the electronic control unit of high pressure common rail diesel engine, that the research have higher theory and utility value.
总之，本文的研究为高压共轨柴油机电控系统的研发探索了新思路，其成果不但具有一定的理论价值，而且具有较高的应用价值。
The pressure value could be equipped by suitable actuator and control value according to different pressure setting range.
可根据不同的压力设定范围而选配合适的执行器与控制阀组成调压阀。
The pressure value could be equipped by suitable actuator and control value according to different pressure setting range.
可根据不同的压力设定范围而选配合适的执行器与控制阀组成调压阀。
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