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1The axial evolution law on the structure and the aerodynamic characteristics of the asymmetric flows around slender bodies of revolution at incidences is summarized:whether the flow asymmetry is powerless or powerful,the flow always appears in the structure that lee-side vortices rise,and shed vortices form,and new lee-side vortices come into being alternately on opposite sides of a slender body of revolution axially from nose apex downstream to afterbody,and always induces the sectional side force of waving quasi-sinusoidally downstream axially.

1总结出细长旋成体有攻角非对称绕流流场结构和气动力特性的轴向演化规律:无论非对称性强弱,沿轴向从头部尖顶往后体,非对称绕流总是呈现为左、右两侧背涡交替从物面向上飘起、形成脱落涡、再衍生出新生背涡的流场结构,并诱导出沿轴向呈类似正弦曲线形式振荡分布的截面侧向力。

It comprises an in-put shaft hinged to its yoke through one axis, and an out-put shaft also hinged to its yoke through another axis, and these two yokes (13) were combined together by only one axis position, perpendicular to that two yoke axes like a cross, so that this combined axis will bend just like the angle bisector of that two shafts to maintain its constant velocity by a few methods, firstly, by using a section of gear teeth mesh at both ends of the shafts' teeth were so polished so that it can turn longitudinally as usual gear, and also sideways, to provide a larger solid angle of turning from ordinary 45 degrees into 60 or even more.

它包括输入轴,其通过一根轴铰链连接于叉形支架,和输出轴,其通过另一根轴也铰链连接于其叉形支架。并且这两个叉形支架(13)只需用一根相对垂直铰链轴相连而组合在一起,使得这种组合的轴总能形成这两个轴的角平分线,以通过少数几种方法保持其恒速,首先,通过用啮合在轴的两端的一段齿轮齿抛光为以能够像普通齿轮一样纵向转动,并且还能够侧向转动,以提供较大的转向立体角,从通常的45度变成60度或更大。

Based on the prior art, the optical engine according to the invention has the improvements that, three optical axis steering components are respectively introduced into red, green and blue light illumination systems, and an optical axis lengthening structure is introduced into the green light illumination system, so that optical axes of the red, green and blue light illumination systems, each of which is from an LED resource to the optical axis steering component, are counterclockwise rotated for 90 degrees, parallel with each other, parallel with an optical axis of a projection lens, arranged in a same plane and positioned under the projection lens, luminous faces of three LED luminous chips of the red, green and blue light illumination systems are in a same plane, and the three LED luminous chips can be mounted on a same heat-radiating plate, therefore, the heat-radiating system has a simplified structure, and the optical engine has reduced size.

在背景技术所述的光学引擎的基础上作以下改进,在红、绿、蓝光照明系统中引入三个光轴转向器件和在绿光照明系统中引入光路加长结构,旨使:红、绿、蓝光照明系统各自的从LED光源至光轴转向器件部分的光轴朝逆时针方向转动90°、互相平行、与投影镜头的光轴平行、居同一平面和位于投影镜头的下方,红、绿、蓝光照明系统的三个LED发光芯片的发光面居同一平面,三个LED发光芯片可安装在同一块散热平板上,散热系统的结构简化,所述的光学引擎的尺寸减小。

By academic analyzing, it is concluded that two order discrete paraxial approximation formula of the paper, multiple transmitting formula and polynomial extrapolation formula are the different forms of continuous paraxial approximation formula, so they are with nearly equivalent precision and stability and with equivalent applicability and limitation.

据此文献[3]将傍轴近似公式归结为一类从特定的无限域模型导出的人工边界条件,并且提出了新的从一般无限域模型导出的具有普适性的、称为"多次透射公式"的局部人工边界条件。那么,是否也可以从一般无限域模型导出具有普适性的傍轴近似公式呢?

According to the boundary relations of the electromagnetic field, and based on the phenomena of double refraction and double reflection in crystals, the reflectivity and transmissivity are deduced at boundary when an extraordinary beam is incident from an isotropic medium upon a crystal or from a crystal to an isotropic medium with optical ax.

为分析非常偏振光在晶体表面的能量损耗,给出一种求解反射率和透射率的方法,即根据电磁场的边值关系以及晶体的双折射和双反射现象,求解晶体光轴在入射面内时,非常偏振光从各向同性介质入射到晶体和从晶体出射到各向同性介质两种情况的反射率和透射率的方法,并给出反射率和透射率的解析解,同时得到对于晶体光轴在入射面内的情况,光轴的取向对非常偏振光反射率的大小几乎没有影响,但对产生全反射的临界角θc影响较大的结论。

The Company is a professional production of long-term flexible coupling, gear-type coupling, flange coupling, coupling roller, slider coupling the main processing unit, my plant has a processing center, CNC Lathe , wire-cutting and all kinds of ordinary cars, milling, planing, grinding and other medium-sized processing equipment totaling more than 30 Units, or in the area of 1500 square meters, and its predecessor was the Wuhan plant, subordinate units of vehicles engaged in precision machining for decades, its technical strong, the company will not only provide high-quality machining products, but also provide a comprehensive service, from product design, processing, manufacturing, packaging, transportation and other integration services, our constant self-perfection, technology continues to improve, put all the targets set up at "Customers are our God" on the basis points.

本公司是一家长期专业生产弹性联轴器、齿型联轴器、凸缘联轴器、滚子联轴器、滑块联轴器为主的加工单位,我厂拥有加工中心,数控车床,线切割及各类普通车、铣、刨、磨等中型加工设备共计三十多台,占在面积1500平方米,其前身是武汉车辆厂的下属单位,从事精密加工数十年,其技术力量雄厚,公司不仅提供品质卓越的机械加工产品,更提供全面周到的服务,从产品设计、加工制造,包装运输等一体化服务,我们不断的完善自我,技术不断提高,把一切目标都建立在"客户是我们的上帝"的基点上。

The device comprises: a conveyer belt; a let-off roller (16) on which the conveyer belt runs and from which the rubber tape is let off; a traverser (21) to move the let-off roller (16) in an X-axis direction parallel to the rotational axis of the object; a radial shifter to move the let-off roller in a Y-axis direction perpendicular to the X-axis direction; a tilter (23) to turn the rotational axis of the let-off roller (16) around a reference axis which is parallel to a Z-axis direction perpendicular to the X-axis direction and Y-axis direction.

所述装置包括:输送带;送出辊,所述输送带在送出辊上行进并且所述橡胶带从送出辊送出;移动台,其沿平行于物体的旋转轴线的X轴方向移动送出辊;径向移位装置,其沿垂直于X轴方向的Y轴方向移动送出辊;倾转装置,用于绕平行于Z轴方向的基准轴线转动送出辊的旋转轴线,所述Z轴方向垂直于X轴方向和Y轴方向。

Based on the stress analysis to spired axis mechanism,in the aspect of sliding part which smoothes through alveolus intersection, theresearch of parameters optimization, about the middle alveolus of spired axis andthe dimension of sliding part, has been studied. To the problem that the reverseportion at the both sides of spired axis lashed fiercely and fraies quickly, thearticle finely analyses the best curve of alveolus when adding cushiony spring atthe both sides.

在对螺旋轴机构进行受力分析的基础上,从滑块顺利通过齿槽交叉点的要求方面,对螺旋轴中间段齿槽和滑块的尺寸进行了参数优化分析;针对螺旋轴两端曲线齿槽反向段在高速工作时冲击大、磨损快的问题;从减少滑块在齿槽反向段运动的冲击方面,比较分析了圆弧、抛物线、三角函数等曲线作为螺旋轴齿槽反向段曲线的加速度,提出了较优的(来源:ABCab论bf文网www.abclunwen.com)反向段曲线。

The Company is a professional production of long-term flexible coupling, gear-type coupling, flange coupling, coupling roller, slider coupling the main processing unit, my plant has a processing center, CNC Lathe , wire-cutting and all kinds of ordinary cars, milling, planing, grinding and other medium-sized processing equipment totaling more than 30 Units, or in the area of 1500 square meters, and its predecessor was the Wuhan plant, subordinate units of vehicles engaged in precision machining for decades, its technical strong, the company will not only provide high-quality machining products, but also provide a comprehensive service, from product design, processing, manufacturing, packaging, transportation and other integration services, our constant self-perfection, technology continues to improve, put all the targets set up at "Customers are our God" on the basis points.

本公司是一家长期专业生产弹性联轴器、齿型联轴器、凸缘联轴器、滚子联轴器、滑块联轴器为主的加工单位,我厂拥有加工中心,数控车床,线切割及各类普通车、铣、刨、磨等中型加工设备共计三十多台,占在面积1500平方米,其前身是武汉车辆厂的下属单位,从事精密加工数十年,其技术力量雄厚,公司不仅提供品质卓越的机械加工产品,更提供全面周到的服务,从产品设计、加工制造,包装运输等一体化服务,我们不断的完善自我,技术不断提高,把一切目标都建立在&客户是我们的上帝&的基点上。

The apparatus for assembling a door and a main body in a microwave oven includes a hinge plate mounted in a main body of a microwave oven, a hinge shaft mounted in a cut-open portion of a choke cover fixed to a door, for being rotatably fixed to the hinge plate, and a detachment prevention portion elastically deformed to allow the hinge plate to be fixed to the hinge shaft and restored to the original state if the hinge plate is completed to be fixed to the hinge shaft to prevent the hinge plate from being detached from the hinge shaft.

包括一个安装在微波炉主体上的铰链板,一个安装在阻波盖的切开部分的铰链轴,其阻波盖固定在门上,该铰链轴可旋转地固定在铰链板上,和一个可拆防护件,它可进行弹性变形以允许将铰链板固定在铰链轴上并且在铰链板完全被固定在铰链轴上后,恢复到原始状态,以防止铰链板从铰链轴中脱开。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。