循环控制

The completion of automatic cycling of cutting operations on engine lathe or turret lathe by means of limit catches and electrical elements has often been refered as simple programming control .

利用行程挡块和电气元件控制普通车床或六角车床，实现刀架自动循环的简易程序控制，在上海的工厂、学校和科学研究单位中，已经进行了将近五年的试验。

Since the roots of the characteristic equation of the digital control system must stay inside the unit circle =1 in the z-plane for the overall system to be asymptotically stable,we see that the second-order digital control system can be unstable for large values of T.

由于基层的特征方程的数字控制系统必须留在单位内循环= 1中的Z -飞机的整体系统是渐近稳定的，我们看到，二阶数字控制系统可为大型值不稳定普通应用评委的稳定性试验的特征方程的均衡器。

In many variable speed drives torque control is necessary but precise closed loop control of speed is not.

许多不同的速度运动，要精确控制扭矩控制车速不封闭循环。

Taking normal circulation of heating furnace walking beam for example, the structure and operating principle of three main current change valves are raised with the emphasis on the pressure oil change under each action.

以加热炉步进梁正循环为例，阐述了三个主要电液换向阀的结构及动作原理；并详细分析其每一动作中控制油路压力油的变化情况；说明了将控制油路由"外控"改为"内控"后系统仍然能正常工

A Ethernet control system is formed between IPC and PLC in order to improve the reliability and the extendibility.

文中介绍了300MW机组循环水联合处理控制系统的设计方案，同时给出了系统配置和实现的控制功能。

Results of reforecast are compared with the standards again and again until the goal of control is achieved.

措施应用后将新的预测结果再次与控制标准比对，如此循环反馈，直至达到控制目标。

It is necessary to carry out a thorough study on pest control technology with DMDS, with an expectation of obtaining a new fumigant of methyl bromide alternative.2. Investigation of the toxicity of fumigation on adult and mixed stages of the three most tolerant insect species -- Sitophilus oryzae, Rhyzopertha dominica and Tribolium castaneum -- under a range of EtF、DMS and DMDS doses in a Flow-through Fumigation System shows that the FTFS procedure offers a constant concentration of fumigant with low CO2 concentrations and ensures that the fumigant toxicity is effectively not compromised by CO2. In comparison with chamber fumigation method, the toxicity data of EtF、DMS and DMDS obtained from this experiment is more accurate by using FTFS.

主要研究结果如下：1、甲酸乙酯和二甲基二硫对仓储害虫具有良好的控制作用，应加快甲酸乙酯替代溴甲烷防治仓储害虫开发应用，同时，二甲基二硫是很有潜力的仓储害虫防治熏蒸剂，要深入进行二甲基二硫控制有害生物的技术研究，以期获得新的溴甲烷替代熏蒸剂。2、利用循环熏蒸系统测定了甲酸乙酯、二甲基二硫和甲硫醚对米象Sitophilus oryzaeL。

The first case is the variable depth with a fixed notch-width and the second case is variable width with a fixed notch-depth. It can be observed fromthe moment-curvature curve of the first case that the magnitude of the moment is larger for the deeper depth than that for the shallow depth.

由有限元素ANSYS 分析结果可以观察出，在控制固定曲度做循环弯曲负载时，弯矩－曲度曲线图显示出，在固定凹槽的宽度，当深度较浅时，达到设定的控制曲度所需施加的弯矩相对於凹槽深度较大的圆管要大的多。

The cooling system is made up of the passages inside the engine block and heads, a water pump to circulate the coolant, a thermostat to control the temperature of the coolant, a radiator to cool the coolant, a radiator cap to control the pressure in the system, and some plumbing consisting of interconnecting hoses to transfer the coolant from the engine to radiator and also to the car's heater system where hot coolant is used to warm up the vehicle's interior on a cold day.

制冷系统是在发动结内部中间和顶部有许多段组成的，一个水泵来循环制冷剂，一个自动调温器来控制制冷剂的温度，一个水箱来冷却制冷剂，一个水箱盖来控制系统的压力，许多泵还包括互相连接的水管输送制冷剂在发动机和水箱之间，或是发动机和汽车的加热系统，当冷天气，加热剂来增加汽车的内部温度。

The paper presents to make use of cycle control for features of autocycle on- off control on ac primary feed side and implementing principle circuit.

本文介绍了利用周波控制技术对交流一次供电侧进行自动循环通断控制的特点及原理电路。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。