four-pass 四通(5)   四通      Fiber Phase-Conjugator in Four-Pass MOPA System with High Repetition Rate      LD抽运高重复频率四通放大MOPA系统中的光纤相位共轭研究 短句来源      The four-pass pumped coupling system of the high power diode lasers stack      高功率二极管激光器面阵四通抽运耦合系统 短句来源      FOUR-PASS AMPLIFIER OF OPTICAL PULSE IN DOUBLE-SIDE PUMPED Ti:SAPPHIRE      双向泵浦钛宝石的四通放大器 短句来源      4． A low-repetition-rate CPA system was designed, which consisted of aregenerative amplifier and a four-pass amplifier, which operated stablyand could self-start.      四、设计并完成飞秒激光啁啾脉冲放大系统。 采用再生放大和四通放大构成的两级放大系统，实现了高能量的飞秒脉冲输出，可维持自启动并且运行可靠。 短句来源      A nearly flat top pump profile is achieved with a good design for the four-pass optical coupling system.      设计了四通光学耦合系统,通过优化经微柱透镜准直后光束的发散角,实现了抽运光的近平顶分布。 短句来源   “four-pass”译为未确定词的双语例句      For a 0.1mJ, 200-ps laser pulse, the four- pass amplification of 7×102 has been achieved.      对于单个0.1mJ、200ps的激光脉冲,四程放大器能提供7×10~2的放大倍数。 短句来源      In the amplifier laser wavelength was 1053 nm, laser material was c-axis Nd∶YLF, repetition rate was 1 Hz, four-pass structure was used, the total pumped power of amplifier was 1.8 kW, the central wavelength of diode was 797 nm, in the amplified cavity the diode was arranged compactly, and the high pumped efficiency was obtained.      放大器工作波长为1053nm,工作物质为c轴Nd∶YLF,重复频率1Hz,采用单个放大腔四程放大的光路结构,放大腔总抽运功率为1.8kW,激光二极管的中心波长为797nm,放大腔中激光二极管采用环状密耦合的方式,实现了高效抽运。 短句来源      The relationship between mechanical properties and weld appearance of the joints by the two-pass welding with large current(DL)and the four-pass welding with small current (XS)were investigated in tandem GMAW of 20mm thick 2519 aluminum alloy plate.      针对20mm厚2519铝合金板,试验了大电流两道焊(DL)和小电流四道焊(XS)两种GMAW焊接工艺对焊缝成形和接头的力学性能的影响。 短句来源      Some Problems and Steps of Four-pass Multimode Fiber Rotatory Connector      四通道多模光纤旋转连接器的相关问题及措施 短句来源      Based on the merits of the above two process, a new process named four-pass welding with large current (DS) was puts forward.      综合DL和XS焊接工艺的优点,提出了新的大电流四道焊接工艺(DS)。 短句来源 更多          相似匹配句对      The Four Feathers      四根羽毛 短句来源      Part four.      第四部分，议程设置理论的意义。 短句来源      On the"Four-Respects      “四个尊重”解读 短句来源      The Four-Stringed Pipa      琵琶——中国弹弦乐器(英文) 短句来源      Application and research of PASS      合理用药监测系统的应用及研究 短句来源 查询“four-pass”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   four-pass Adiabatic shear bands of 200 to >amp;lt;300 μm in width were formed in the as-extruded and 1-pass ECAP specimens having coarser particles, whereas they were hardly formed in the four-pass and eight-pass ECAP specimens having finer particles.        These steels were fabricated by four-pass hot rolling and coiling at 650°C, 600°C, and 550°C.        For a 0.1 mJ, 200 ps laser pulse, we obtained four-pass amplification of 7 × 102 with a pump energy of 106 J.        The laser chain consists of a master oscillator, gas absorber cells, and a four-pass amplifier.        It demonstrates successful management using a dynamically stable resonator in the regenerative amplifier and compensation for thermal lensing by a convex mirror in a ring-type four-pass power amplifier.        更多           In this paper the construction and operation characteristics of a high power Nd r YAG laser system are described. The laser system consists of an active-passive mode-looked oscillator in colliding pulse regime, a single pulse selector and a fourpass amplifier. The oscillator generates mode-locked pulse trains with widely variable pulsewidths (20ps～2.5ns) and a fluctuation of the pulse-train envelope <±4%. For a 0.1mJ, 200-ps laser pulse, the four- pass amplification of 7×102 has been achieved. 本文描述一台由两级Nd:YAG激光器组成的紧凑高功率激光系统的结构及其工作性能。激光系统分成三个部分:对撞脉冲式的主-被动锁模振荡器,单脉冲选择器和四程放大器。振荡器输出锁模脉冲列的包络幅度起伏小于±4％,其脉冲宽度可以在宽范围内(20ps～2.5ns)方便地切换。对于单个0.1mJ、200ps的激光脉冲,四程放大器能提供7×10~2的放大倍数。 In order to obtain supreme economic results for heat exchanger to recover waste heat, this paper deduces the calculation formulae of optimal component efficiency, optimal heat transfer area and optimal heat-exchanging temperature of n-pass A unmixing and B mixing cross flow heat exchanger. For convenient calculation,the paper also makes a chart of optimal component efficiency of common-used two and four-pass cross flow heat exchanger,illustrates with examples how to use these formulae and chart in desigh... In order to obtain supreme economic results for heat exchanger to recover waste heat, this paper deduces the calculation formulae of optimal component efficiency, optimal heat transfer area and optimal heat-exchanging temperature of n-pass A unmixing and B mixing cross flow heat exchanger. For convenient calculation,the paper also makes a chart of optimal component efficiency of common-used two and four-pass cross flow heat exchanger,illustrates with examples how to use these formulae and chart in desigh calculation. 基于热交换器回收余热取得最大经济效益出发,导出了n行程A不混合B混合叉流热交换器的最佳分效率、最佳换热面积和最佳换热温度计算公式.为了方便计算,绘制了常用的2、4行程叉流热交换器的最佳分效率线图,并举例说明在设计计算中怎样使用这些公式和线图。 In this paper, an extensive experimental investigation was made on the pressure drop of two-phase flow of air-water mixtures across the tube bundle in a shell and tube heat exchanger. A verticalshell and tube heat exchanger model was constructed and the tube bundle in the cylindrieal shell wascomposed of 49 tubes with three baffies giving four passes. The friction pressure drop and minor pres-sure drop were measured as the air-water mixtures horlzontally entered the model from its bottom andflowed up across... In this paper, an extensive experimental investigation was made on the pressure drop of two-phase flow of air-water mixtures across the tube bundle in a shell and tube heat exchanger. A verticalshell and tube heat exchanger model was constructed and the tube bundle in the cylindrieal shell wascomposed of 49 tubes with three baffies giving four passes. The friction pressure drop and minor pres-sure drop were measured as the air-water mixtures horlzontally entered the model from its bottom andflowed up across the tube bundle. Based on separated flow model and the experimental results, corre-lations for pressure drop (friction pressure drop & minor pressure drop) were developed. 本文对垂直布置的管壳式换热器中，气液两相流冲刷管束时的流动阻力进行了实验研究。实验段采用管壳式换热器模型，其圆形外壳内的管束由４９根管子组成，并沿长度方向用三块折流板将管束分成四个冲刷流程。当气液两相流自下而上冲刷管束时，分别测量摩擦阻力和局部阻力，并用分相流动模型进行分析，得到良好的计算关联式。   << 更多相关文摘      相关查询 four-dimensional four-lane four-chamber four-part four-coordinated four-rod four-generation four-bar four-axis four-coordinate four-quad four-years

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