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Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础,提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd:YAG激光器的总体方案,并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析;设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具;建立了两种不同功率激光二极管端面浦的Nd:YAG激光实验系统,并对液晶盒的透射性质进行了测试;将未灌注液晶的空液晶F-P摘要标准具插入大功率LD浦Nd:、叭G激光谐振腔内,观察到了单纵模激光输出,说明所设计和加工的液晶F一P标准具具有纵模选择能力;将镀有增透膜的液晶盒插入大功率LD浦Nd八7AG激光谐振腔内,是否产生了激光纵模分裂现象还难以确定。

The valveless pump has inlet and outlet with tapered tube and does not need control of valves. The flow rectification of the valveless pump can be realized based on the nozzle/diffuser action. The differential SMA actuator controlled by alternative current makes the baffle of the valveless pump reciprocating motion.

该无阀具有锥形入口和出口而不需要阀门控制,单方向流是靠锥形入口和出口的收缩和膨胀作用实现的,差动式形状记忆合金执行器在交变电流的控制下使无阀的挡板往复运动。

Especially ZBG series can be an ideal energy-saving product to replace WARMAN with the medium density and anti-corrosion in HH series, among which ZBG series of slurry pump can be used in multi-stage in a series within permissible maximum pressure of 3.6Mpa.

ZBG系列渣浆是替代HH系列中浓度,中磨蚀WARMAN的理想节能换代产品,其中ZBG系列渣浆在压力允许范围内可以多级串联使用,其允许最大工作压力为3.6MPa。

Especially ZBG series can be an ideal energy-saving product to replace WARMAN with the medium density and anti-corrosion in HH series, among which ZBG series of slurry pump can be used in multi-stage in a series within permissible maximumpressure of 3.6Mpa.

ZBG系列渣浆是替代HH系列中浓度、中磨蚀WARMAN的理想节能换代产品,其中ZBG系列渣浆在压力允许范围内可以多级串联使用,其允许最大工作压力为3.6MPa。

A change in single-screw pump suction valve opening degree, when the suction vacuum is small, pump parameters changed little, and when the suction vacuum is larger, the pump working conditions deteriorated dramatically.

改变单螺杆吸入口阀门开启度,当吸入口真空度较小时,特性参数变化不大,而当吸入口真空度较大时,的工作状况急剧恶化。

At a certain point in the suction cycle after the vacuum inlet, a defined amount of fresh air is let into the pump through the second suction opening from the atmosphere, thus allowing the pump not only to produce a good vacuum, but simultaneously produce a very high blast air flow even after the vacuum has been generated.

复合额外配有一个被称为&二次吸收&的风口。在真空进程之后的吸气循环一个特定点上,确定数量的新气体通过二次吸收口从大气进入体,从而使不仅产生良好的真空,而且在真空形成的同时产生压力很高的吹送气流。

By using of differentially drug release technology, various drug release profiles can be obtained by SOTs, and also, the weight of three layers of SOTs can be accommodated separately with unchanged dissolution profiles, thus, optimal formula which is suitable for tri-layer tableting machine can be achieved.

实验结果表明,通过异步释放技术的使用,可以使渗透制剂的释药曲线多样化,同时,该方法还可以在确保最终释药曲线不变的前提下,对三层渗透制剂中三个物料层的重量进行分别调节,从而得到最适合于三层压片机打片的三层渗透处方。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

公司主要专业生产经营多种类,规格齐全。主要生产日本标准JIS,以及DIN,ANSI,BS等标准的船用法兰阀门,铸钢截止阀/角阀,铸铁截止阀/角阀,防浪阀,消防阀,闸阀,碟阀及配件等。并且代理美国GRACO气动隔膜,气动柱塞,高压清洗等一系列产品。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, steel stop valve and angle valve, iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN,ANSI,BS等标准的船用法兰阀门,铸铁截止阀/角阀。铸钢截止阀/角阀,防浪阀。消防阀,闸阀,蝶阀,德标/美标蝶阀及配件等,并且代理美国GRACO气动隔膜,气动柱塞,高压清洗

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN,ANSI,BS等标准的船用法兰阀门,铸铁截止阀/角阀。铸钢截止阀/角阀,防浪阀。消防阀,闸阀,碟阀,德标/美标蝶阀及配件等,并且代理美国GRACO气动隔膜,气动柱塞,高压清洗

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I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。