查询词典 atomic diameter

Agitation system of pyrolusite pulp: a ratio of the agitation diameter to reactor diameter : d/D= 0.35; a ratio of distance of agitation from the bottom of reactor to agitation diameter : y/d=0.5; agitation rate of 500～600r/min.

矿浆搅拌系统：采用上旋式搅拌器；搅拌器的直径d与反应器直径D之比为d/D=0.35；搅拌器下端离反应器底部的距离y与搅拌器直径d之比为y/d=0.5；搅拌转速500-600r/min。

Quartz plate area of 154 square meters, about 8 meters in diameter on the inner ring, core and the guidelines set to take off cut flower production, a diameter of about 14 meters between the outer and inner diameter mosaic of 12 bronze reliefs of 2.6 meters, Patterns for the 12 constellations.

石英钟盘面积154平方米，在直径约8米的内环上，盘芯和指针采取花挡镂空制作，直径约14米的外环与内环间镶嵌12个直径2.6米的青铜浮雕，图案为12星座。

Reflector telescope relative a larger diameter can be done, the main focus of the relative telescope diameter is about 15-125, even greater, Wang DC, inter Newton Telescope, the tube is longer than the system is much shorter focal length, coupled with the main mirror is only one apparent need for processing, which greatly reduces cost and manufacturing difficulties, there is currently greater than 134 meters diameter optical telescopes are all reflecting telescope.

反射望远镜的相对口径可以做得较大，主焦点式反射望远镜的相对口径约为15—125，甚至更大，而且除牛顿望DC远镜外，镜筒的长度比系统的焦距要短得多，加上主镜只有一个表面需要加工，这就大大降低了造价和制造的困难，因此目前口径大于134米的光学望远镜全部是反射望远镜。

Reynolds number of impingement, inclined jet angle, the ratio of the jet distance to the diameter of the jet hole and the relative curvature (the ratio of the diameter of jet hole to the diameter of concave surface) were changed to study the rules of flow structures varying with these parameters. At the same time, the developing and disappearing phenomena of the induced vortex were analyzed.

通过改变冲击雷诺数、冲击角度、相对冲击间距（冲击间距和冲击孔直径之比）以及相对曲率（冲击孔直径同凹面靶板直径之比）等参数，分析了受限空间中，斜向冲击曲率表面后产生的涡系结构及其发展和变化规律。

The constant nutritional arteries of the great saphenous vein-saphenous nerve on the medial foot: Perforator at medial side of the tendon of the tibialis anterior ,it is （2.27±0.43）cm distal to the intermalleolar line .it passes across the medial side of the tendon of the tibialis anterior and pierces the deep fascia between the upper and lower bundle of the inferior extensor retinaculum with a diameter of （0.72±0.04）mm;The length of it after piercing the deep fascia is （7.3±0.6）mm,It has an emerging rate of 95%; Perforator between tendons ,it is （3.02±0.39）cm distal to the intermalleolar line;it pierces the deep fascia between the tendons of tibialis anterior and extensor digitorum longus with a diameter of (0.57±0.06)mm ;The length of it after piercing the deep fascia is （7.4±0.6）mm .It has an emerging rate of 94%; A constant distal fascial perforator pierces the deep fascia between abductor hallucis muscle and medial side of first metatarsal bone （1.97±0.23）mm distal to the first metatarsophalangeal joint with a diameter of (0.50±0.03)mm.

足内侧大隐静脉-隐神经营养血管近端来自内踝前动脉较为恒定，外径较大的穿支有：踝间线远端（2.27±0.43）cm，经胫骨前肌腱内侧、伸肌下支持带上、下束间穿出，外径(0.72±0.04)mm ，穿出深筋膜的长度为（7.3±0.6）mm，出现率为95%；踝间线远端（3.02±0.39）cm，经胫骨前肌腱与趾伸肌腱穿出，外径(0.57±0.06)mm，穿出深筋膜的长度为（7.4±1.2）mm ，出现率为94%；3远端来自交通支最为恒定，外径较大的穿支于踇展肌与第一跖骨内侧缘之间穿出深筋膜，距第一跖趾并节近端（1.97±0.23）cm，直径（0.50±0.03）mm，穿出深筋膜的长度为（6.5±0.5）mm，出现率为100%。

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

GO and NOT GO Plain Ring and Snap Gages for Checking Major Diameter of Product External Thread: The GO gage must completely receive or pass over the major diameter of the product external thread to ensure that the major diameter does not exceed the maximummaterial-limit.

用于检查产品外螺纹大径的通规与止规普通环规及卡规：这个通规必须完全配合或经过产品外螺纹大径来确保大径不会超过最大实体极限。

10 People table diameter is 1.8 meterqq空间沪菜qq空间沪菜qq空间沪菜, turnplate is 0.9meter; 8 people table diameter is 1.6 meterqq空间沪菜, turnplate is 0.7 meter; 6 people table diameter is 1.2 meterqq空间沪菜qq空间沪菜, turnplate is 0.5 meter; table's tall is 0.76 meter; chair's tall is 0.45 meter.

10人、8人、6人席位直径分别是1.8米、1.6米、1.2米，转盘的直径分别是90公分、70公分、50公分qq空间沪菜qq空间沪菜，桌高是76公分qq空间沪菜qq空间沪菜，椅高是45公分。

Permissible bending radius: not less than 6 times of overall diameter for unarmored cable ; not less than 12 times of overall diameter for armored or screened cable ; not less than 6 times of overall diameter for screened flexible cable .

推荐允许弯曲半径：无铠装层电缆应不小于电缆外径的 6 倍；有铠装层或屏蔽层结构的电缆应不小于电缆外径的 12 倍；有屏蔽结构的软电缆应不小于电缆外径的 6 倍。

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征，并取得如下结果：利用速率方程理论讨论了激光器激射阈值的特性，分析了阈值与腔体积和自发发射耦合系数β之间的关系；讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性；光子阱结构在其归一化厚度在0.15-0.5之间时，几乎全部自发发射进入到最低阶TE模式中；研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺；利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器；直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW，是目前所见文献报导中比较低的；直径2μm的微碟连续光泵浦激射阈值仅几μW，目前尚未见到达到类似结果的研究报导；为解决微碟激光器激射光定向引出的问题，通过波导耦合模理论分析了双层碟之间功率耦合效率；据此设计了新型带耦合输出波导的电泵浦微腔激光器，为进一步研制可实用的电泵浦微腔激光器打下基础。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。