The goal is to control the water outlet temperature by manipulating the flow rate of the steam and control the water inlet rate by manipulating the height of the water level in the water tank 本文中，换热器的控制任务主要有两个，首先通过控制水箱进口水阀门开度，进而控制水箱水位，进而控制换热器进口水流量。
In the water works control aspect , modifying the valve by the effective algorithm can lighten the pipe ' s pressure in order to resolve the water hammer defensive problem 在水利控制方面，针对工程中需要重点解决的水锤防护问题，采取有效的控制算法，通过控制阀门开度来调节管道流量，达到减轻管道承受的压力的目的。
( 2 ) owing to the low prediction precision of the conventional statistic model for crack opening displacements , three statistic model and chaos theory - based hybrid prediction models with higher precision are presented ( 2 )传统的裂缝开度统计模型的预测精度较低，提出了三种预测精度更高的统计与混沌混合预测模型。
Through some examples , we think that the ultrasonic imaging method that can obtain some parameters of the crack attitude and the opening is an effective method in studying the crack of underground rock stratum 经过多项工程实践，我们认为超声成像法对钻孔孔壁扫描获得裂隙产状、开度等参数是研究地下岩层裂隙的有效方法。
1 the valve and the adjustment device of the boiler steaming - water pipe should be clearly marked , which should indicate the valve name , number , switch direction and working medium flowing direction , and the main regulating valve should have opening indicator 1锅炉汽水管道的阀门及调整装置应有明显标志,标明阀门名称、编号、开关方向以及工质流动方向,主要调节阀应有开度指示。
The results showed that adi provided smaller stomata opening to reduce the useless luxury transpiration loss , the height of cotton under adi was restricted under low irrigation level , but not significant under high level 结果表明，交替滴灌处理棉花叶片气孔开度减小，减少了奢侈的蒸腾损失，灌溉定额较小时根系分区交替滴灌对棉花的株高抑制作用较明显，灌水定额较大时限制作用不显著。
It makes hydraulic turbine running with peak efficiency all the time . the governor is designed with model structure . closed - loop start - up strategy is applied during running and it realizes three adjust mode - frequency , wicket gate and power 调速器采用模块结构进行设计，在调节过程中实现了闭环开机控制策略，并可在频率调节、开度调节、功率调节三种调节模式之间自动或手动无扰动切换。
Best test regions are confirmed to found the acoustic emission test method for valve leakage . the large amount of data collected also allowed a brief investigation of the effects of different opening , valve types , differential pressure and leakage rates 根据本次研究工作的目的和特点并结合现场的实际情况，探讨了内漏时阀门开度、阀门类型、两侧压差以及泄漏率等因素变化时的声学特性。
After retrofitting the digital electro - hydraulic ( deh ) control system of the steam turbine unit no . 1 in dezhou power plant , the valve stem leakage has occurred on the highpressure main steam valve , and the causes leading to the said leakage being analysed 摘要对德州电厂1号汽轮机组在经过deh控制系统改造后高压主汽门杆发生蒸汽泄漏的原因进行了分析，认为蒸汽泄漏是热态时阀门开度不足所致。
1 oomm nacl induced the open stomata of wild type close effectively , while the effects of nacl on stomatal aperture of ios5 were not significant ; 1 oomm naci and loum aba effectively induced stomatal closure of both wild type and ios5 100mmnacl可有效诱导野生型开放的气孔关闭，而对los5气孔开度的影响不很明显： 100mmnacl与10 m的aba共处理时，野生型及los5气孔开度均明显减小，且幅度类似。
