双轴

Power-law fluid is used to describe the Non-newtonian rheological property of the produced fluid in a polymer-driving well; the governing equations, boundary and initial equations of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially is established in bipolar coordinates system; formulas of instantaneous flow rate and stress distribution on the outwall of the inner cylinder of the unsteady flow of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially are established.

在理论上，用幂律流体模型描述了聚合物驱油井产出液的非Newton流变性；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中非定常流的控制方程及边界条件和初始条件方程；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中流动时瞬时流量和流体在内管壁上的压力分布计算公式。

The invention is a rotary image-free 45-degree scan optical system, and it includes a 45-degree scanning mirror, double-reflecting optical converging primary system, K mirror rotary image eliminating system and after optical system, where the rotary axis of the 45-degree scanning mirror coincides with the optical axes of the other three systems, composing its optical axis.

一种无像旋的45°镜扫描光学系统，该系统包括45°扫描镜、双反射光学会聚主系统、K镜消像旋系统和后光学系统，45°扫描镜的旋转轴与双反射光学会聚主系统、K镜消像旋系统和后光学系统的光轴重合，构成本光学系统的光轴。

Double refraction and reflection of sequential crystal interfaces with arbitrary orientation of the optic axis are discussed.

3研究了光轴方向任意的单轴晶体的连续双折射双反射。

Then with the relations between the output of interface 1 and the input of interface 2, double refraction and/or double internal reflection in a crystal along two successive interfaces can be calculated.

在惠更斯定理的基础上，对从空气到晶体的折射、从晶体到空气的折射、近光轴入射的晶体全内反射和近光轴反射的晶体全内反射这四种单个界面上的双折射双反射情况，给出了同时适用于o光和e光的光线方向和光波法线方向的普遍公式。

Basing on electromagnetism theory characteristic of light wave, the formula of the relation of refringence e light is inferred under any axis location and any angle, when it is refracting.

基于平面光波在晶体中传播的电磁理论特性，推导了光波在晶体表面折射时，双折射光波中e光线透过晶体出射点的位置受到任意光轴取向、任意入射角影响的关系式；利用MATLAB对关系式进行了数值计算分析，绘出双折射e光与任意光轴取向、任意入射角关系曲线，并给出了对应的定量关系式；实验验证了该公式是正确的。

Moreover, the hot compressive deformation behavior of the RS/PM AZ91 magnesium alloy and AZ91 alloy matrix composite were also investigated, the conclusions are drawn as follows:1. The processing parameters of the atomization-twin rolls quenching technology were optimized as follows: the diameter of the nozzle 1mm, the wheel velocity 25m/s, the pressure of atomization gas 0.3MPa and Ar gas for melt injection 0.1MPa. The RS AZ91 alloy flakes exhibited fine and uniform microstructures. When the flakes were extruded at 673K, extruded velocity of 0.1mm/min and extrusion ratio of 25:1,the magnesium alloy rods with clean surface, uniform dimension and excellent mechanical properties were obtained.2. The RS AZ91 magnesium alloy powders prepared by atomization-twin rolls quenched technology exhibited fine equiaxed grains with the grain size of 1-3μm, the phase constituent included supersaturate solid solution phaseα-Mg and miner fineβ-Mg_(17)Al_(12) phase. The as-extruded materials also exhibited equiaxed grains with the size of 5-7μm and a large number of fineβ-Al_(12)Mg_(17) and fewer AlMg_2Zn phases were detected in the alloy.

本文还研究了快速凝固/粉末冶金AZ91镁合金热压缩变形流变应力行为，快速凝固/粉末冶金法原位生成Mg_2Si增强AZ91镁基复合材料，经过系统的研究，获得如下结论：1、雾化-双辊急冷法在下列工艺参数组合下：双辊线速度25m/s；喷嘴直径1mm；熔体压射压力0.1MPa；雾化气体压力0.3MPa。，可获得宏观尺寸细小、微观组织均匀细小、综合性能优良的的快速凝固AZ91镁合金细碎箔带，快速凝固箔带在挤压温度为673K、挤压速度为0.1mm/min，挤压比为25：1时，可获得的外表光洁、尺寸均匀、组织性能优异的镁合金棒材。2、雾化-双辊急冷法制备的AZ91镁合金粉末态为细小等轴晶组织，晶粒尺寸1-3μm，组织为α-Mg过饱和固溶体和微量的细小β-Mg_(17)Al_(12)相组成；粉末挤压棒材为等轴晶组织，晶粒尺寸5-7μm，组织中含有大量细小的β-Al_(12)Mg_(17)以及AlMg_2Zn析出相，室温力学性能，抗拉强度383MPa，屈服强度275MPa，断后伸长率7.5%。

Upper central incisors moved forward and downward together with maxillary, at the same time they upright in the sagittal plane and tip mesially. 3 The occlusion plane rotated clockwise for about 1.5°. 4 The width increasement effect of RME comes from approximately the equal amounts of skeletal and dental expansion. The mode of dental movement was a combination of body and tipping movements of posterior teeth.

结果：1后牙在宽度方向上为整体移动和倾斜移动相结合的移动方式，但第一磨牙和第一双尖牙稍有差别；牙齿和骨对宽度增加的贡献各占约1/2；2后牙在垂直方向有伸长的趋势；3第一磨牙和第一双尖牙均向前整体移动，轴倾度保持不变；4中切牙整体随上颌骨前部向前向下移动，其牙长轴发生直立，轴倾度增加；5上颌平面发生顺时针旋转。

Inputs and Outputs Front Panel: Phones: Standard headphone output jack (gold-plated) Video 4: Gold-plated stereo RCA jacks, gold-plated RCA composite video jack and S-video jack Digital Optical 3 Input: Standard Toslink digital input with a plastic protective plug Digital Coax 3 Input: Standard gold-plated coaxial digital jack Back Panel: AM Loop Antenna Input: Two thumb screw connections FM 75-ohm Antenna input: Threaded "F" type connector Tape Input/Output: Stereo RCA jacks Video 3 Input: Stereo RCA jacks, RCA composite video jack and S-video jack Video 2 Input/Output: Stereo RCA jacks, RCA composite video jacks and S-video jacks Video 1 Input/Output: Stereo RCA jacks, RCA composite video jacks and S-video jacks DVD Input: Stereo RCA jacks, RCA composite video jack, and S-video jack CD Input: Stereo RCA jacks Monitor Output: RCA composite video jack and S-video jack Subwoofer Preamp Output: 1 RCA jack Digital Optical 1 Input: Standard Toslink digital input with a plastic protective plug Digital Optical 2 Input: Standard Toslink digital input with a plastic protective plug Digital Coax 1 Input: Standard coaxial digital jack Digital Coax 2 Input: Standard coaxial digital jack Digital Optical Output: Standard Toslink digital output with a plastic protective plug Digital Coax Output: Standard coaxial digital jack Remote Control In/Out Jacks: One mini-jack input and one mini-jack output Speaker Outputs: Binding post outputs for front left, front right, surround left, surround right, and center speakers (posts are not 5-way binding posts, because each post has a plastic collar that prevents used with spade lugs and the posts are too far apart to use dual banana plugs) AC Outlets: One unswitched AC outlet and one switched AC outlet

投入和产出接待小组：电话：标准耳机输出插孔视频4 ：镀金立体声RCA插孔，镀金的RCA复合视频插孔和S - Video插孔数字光学3输入：标准Toslink数字输入与一个塑料保护插头数字同轴3输入：标准镀金同轴数字接口背板：上午环形天线输入：两个拇指螺丝连接调频75欧姆天线输入：线程的& F &型连接器，磁带输入/输出：立体声RCA插孔视频3输入：立体声RCA插孔，插孔的RCA复合视频和S - Video插孔视频2输入/输出：立体声RCA插孔，莲花复合视频插孔和S - Video插孔视频1输入/输出：立体声RCA插孔，插孔的RCA复合视频和S端子接口的DVD输入：立体声RCA插孔，插孔的RCA复合视频和S -视频CD输入端插孔：立体声RCA插孔监视器输出：复合视频的RCA插孔和S - Video插孔低音前置输出： 1的RCA插孔数字光1输入：标准Toslink数字输入与一个塑料保护插头数字光2输入：标准Toslink数字输入与一个塑料保护插头数字同轴输入1 ：标准同轴数字接口数字同轴2输入：同轴数字接口标准数字光输出：标准Toslink数字输出塑料防护插件数字同轴输出：标准同轴数字接口远程控制在/输出插孔：一个迷你插孔输入和1个小型插孔输出扬声器输出：结合后产出的左前方，右前方，左环绕，右环绕和中心发言（职位不是5个具有约束力的方式，因为每个职位有一个塑料环，可以防止使用铁锹派和职位过于遥远使用双香蕉插头）交流插座：一个unswitched AC插座和一个开关AC电源插座

The structure brief introduction the dense thick liquid pump of one stud of i-1b s series is formed by four parts electromotor , shaft coupling , pump and bases motive force joining in marriage usefulness uses y s series asynchronous electromotor of three-phase the shaft coupling uses the water pump with the paw mould elasticity shaft coupling the pump by the pump shell , become hollow inside axle and universal twists joints and winds axle , stud , bush and axle seal and package places and goes out the material mouth etc and forms , and the section of stud is the oval for round and bush section , and his interior surface is the duplexing spirals faces .

结构简介 i-1b系列单螺杆浓浆泵由电动机、联轴器、泵和底座四个部分组成。配用的动力采用y系列三相异步电动机。联轴器采用水泵用爪型弹性联轴器。泵由泵壳、空心轴、万向绞接头、绕轴、螺杆、衬套、轴封装置和出料口等组成，螺杆的断面为圆形、衬套断面为椭圆形，其内表面为双螺旋面。

The lens axicon is based on the use of the spherical aberration of the mirror surfaces,which is inexpensive and easy to manufacture into a element with large apertures as compared with diffractive axicons,refractive cone axicons,and earlier lens axicons with aspheric surfaces;the opaque disk can offer the Bessel beams with long non-diffracting distances,and the diameter of the central peak is adjusted by choosing the focal length of the collimating lens;the tunable fluidic conical lens is a new device for generating Bessel beams,which can obtain the Bessel beams with different parameters by varying the refractive indexes of the solution which is filled in the device.

双透镜轴棱锥法主要基于透镜球面像差的运用，与衍射轴棱锥、折射轴棱锥和早期的非球面轴棱锥相比，具有加工简单、便宜，易于制作大尺寸的特点；不透明障碍物法得到的贝塞尔光束具有很长的无衍射距离，其直径可通过选择不同焦距的准直透镜来得到调节；可调流体轴棱锥是一种产生贝塞尔光束的新型器件，它可以很容易地通过改变注入器件的液体的折射率来得到不同参量的贝塞尔光束。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。