泵

A home made laser diode was used to end pump a piece of 1.0 mm long Nd:YVO4 crystal dopped with 1.0%.

用国产的激光二极管端面泵浦厚2.0 mm、掺杂浓度1.0%的Nd：YVO4激光晶体，在注入泵浦光功率为8 W时，用5 mm长的I类临界位相匹配BIBO晶体获得的TEM00模蓝光输出达1.83 W。

In recent years, although chinas dredging industry has achieved vigorous development, the key equipment such as slurry pumps of large and medium sized hydraulic dredgers are mainly imported from abroad. So it is necessary to study the slurry pump.

尽管近几年来国内疏浚事业有了蓬勃的发展，但目前国内大中型水力式挖泥船的关键设备如泥泵等还依赖于进口或仿制，所以有必要对疏浚泥泵进行研究。

With the technology, improve manufacturing processes and quality materials to choose from, small-scale rotor vane vacuum pump can be directly linked with the motor shaft, speed can be as high as 1450 r / min, significantly increased the pump rate and reduced exhaust pump.

随着技术的发展、制造工艺的完善和优质材料的选用，小型滑片真空泵的转轴可与电动机轴直联，转速可高达1450转／分，大大提高了泵的抽气速率和减轻了泵的重量。

This type of pump shell is the level of the axis through the surface of separate subdivision, the removal of the shell with the inhalation pump, exhaust pipe has nothing to do maintenance more convenient.

这种型式的泵壳是在通过轴心的水平剖分面上分开，拆卸泵壳时与吸入、排出管道无关，维修也比较方便。

Vacuum pump exhaust because there is selective and therefore, sometimes can not meet the selection of a pump exhaust requirements, the need for several pumps together, complement each other to meet ventilation requirements.

由于真空泵有选择性抽气，因而，有时选用一种泵不能满足抽气要求，需要几种泵组合起来，互相补充才能满足抽气要求。

Figure 1 is the pump in the suction and exhaust of the process, pump suction chamber with the rotor rotation, the volume gradually increases, inhalation of gas; while the exhaust chamber volume is gradually reduced, the gas is compressed, thereby exhaust gas.

图 1 是泵在吸气和排气的过程，泵吸气腔随着转子的旋转，容积逐渐增大，吸入气体；而排气腔容积则逐渐减小，对气体进行压缩，从而排出气体。

Vacuum pump exhaust because there is selective and therefore, sometimes can not meet the selection of a pump exhaust requirements, the need for several pumps together, complement each other to meet ventilation requirements.

因为真空泵有选择性抽气，因此，有时选用一种泵不能知足抽气要求，须要多少类泵组开止回，相互弥补能力满意抽气要求。

In the down stroke, expansion sleeve recover and there appears a clearance between plunger and pump barrel.

通过有限元力学分析，证明该泵克服了常规柱塞泵摩阻大、效率低、寿命短等不足。

In the upstroke, fluid pressure in the plunger acts on inner surface of expansion sleeve and makes it expand outward, keeping the seal ring press on the inner wall of pump barrel to form good sealing.

上行程时柱塞内部的流体压力作用到胶套内表面上使之向外膨胀，使密封环始终压在泵筒内壁上，形成良好的密封；下行程时弹性伸缩套恢复原状，柱塞和泵筒之间产生间隙。

It adopts a fractional-N PLL synthesizer to realize the FM modulator.An extra offset current has also been applied to eliminate the effects of the mismatch in CP.

该调制器基于小数分频锁相环技术，并在电荷泵单元中引入额外偏差电流消除电荷泵失配对带内噪声的影响。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。