过冷却

As a current cut, cut renewable overpotential, and instantaneous power semiconductor cooling fans overheating protection.

如过电流切断、再生过电压切断、半导体冷却风扇过热和瞬时停电保护等。

The normal overload can be used frequently , its permissible value shall be determined according to the load curve of the transformer, the temperature of cooling medium and the load of the transformer before the overload takes place, etc.; The characteristic curve of overload of the transformer shall be supplied by the manufacturer.

正常过负荷可以经常使用，其允许值根据变压器的负荷曲线、冷却介质的温度以及过负荷前变压器所带的负荷等来确定；制造厂家提供变压器的过负荷特性曲线。

It includes high power high voltage constant-current-charging system, capacitors bank, discharge control system, power supply of preignition for Xe-flashlamps, general control and diagnostic system. The power conditioning system drives flashlamps that pump the SSHCL. Flashlamps are driven by high voltage Silicon Controlled Rectifiers switched, resonant charged, discharge pulse forming network. The system uses microchip and digital circle which is based on CAN-bus for control and diagnostics. Energy diagnosis and thermal management are controlled by computers.

其中大功率高压恒流充电装置采用了L-C串联谐振电路，充电功率大，效率较高；储能装置采用了多节脉冲成形网络，可产生波形良好的强电流放电脉冲；放电控制装置采用高压大功率晶闸管，开关速度快，工作稳定；预燃与触发装置采用了开关电源电路，效率高、功耗小；总控与测量装置采用基于CAN总线的数字电路和单片机技术，控制冷却系统在激光器出光时对脉冲氙灯进行水冷，并对全系统进行控制和状态检测，同时具有过压、过流、过热等保护功能。

Melt superheat treatment is a method to improve the structure and strengthen the mechanical property of metal and alloy.

熔体过热处理主要研究的是金属或合金熔体的结构和物理化学性质随熔体过热处理温度、时间及其在冷却和凝固过程中的变化规律。

To reduce the marking distortion , using the vertical 2 - dimension galvanometer distributing and f field lens focalize , the distance of the second galvanometer to the machining plane is the focus f . to avoid too hign temperature to distroy the resonance cavity because of too long marking time , cooling system and self - protector is used in the design

为减少打标畸变，采用垂直二维振镜分布， f物镜聚焦，将激光束经第二个振镜反射后到加工平面的距离为焦距f ，为了避免打标时间过长，温度过高破坏谐振腔，在设计中加上冷却系统和自我保护装置。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

中文摘要本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

Additionally, the air cooling zone should be set up so as to cool the steam and air mixture. Thus, the steam and air mixture supercooling can be enlarged, the working medium loss reduced and the burden of air ejector taken away.

另外，应该设置空气冷却区，使蒸汽-空气混合物得到冷却，以增大排出的蒸汽-空气混合物的过冷度，减少工质损失，并降低抽气器的负荷。

However, the sea-water system such as condenser and pipings are heavily damaged by blockage in pipes through adhesion and growth of marine organisms and corrosion of copper alloy tubes and tube-sheets in the condensers.

大部分冷却海水管内壁都进行过防腐处理，但是，海水系统中诸如冷却器及连接管总是因海生物的生长而填堵塞，而且海水使铜管及冷却片受到腐蚀。

According to the working principle of engine cooling system,the analysis was performed on the construction and layout of cooling system of XING WANG ZA6440 light bus. It is pointed out that the main reason leading to the engine overheat is poor sealing of the radiator cap,unreasonable selection and layout of the ventilation system.

根据发动机冷却系的工作原理，通过对星王ZA6440轻型客车冷却系的结构及总体布置分析，指出导致发动机过热的主要原因是压力盖密封不良、通风系统选择布置不合理等造成的。

The results show that the parameters of steam over water vapor supplied by the heating device is stable,besides,during taking steam over water vapor as coolant and lubricant,the tool wear was reduced about 50 and 40 percent respectively by com.

研制了以过热水蒸汽作为冷却润滑剂的绿色切削技术所需供汽系统中的二次加热装置，并用该装置进行了不同切削速度下改变冷却润滑剂切削45钢时的刀具磨损对比试验。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。