中心圆

We automatically, External precision grinding systems, automatic surface Superfinishing center, laser welding and other sophisticated machining equipment to control the pre-processed products; fully automated computer-to the seizure, high-precision pressure tester and computer China-test plane, and other advanced product detection system to control the finished product assembly and testing of each link to a round of the device, inductors micrometer, and other sophisticated equipment to control the auxiliary equipment running and operation of the accuracy of the process.

我们以自动内、外圆精密磨削系统，全自动表面超精加工中心，镭射焊接等先进的机械加工设备来控制产品的前期加工；以全自动电脑分检、高精度压力测试仪和电脑泄程测试专机等先进的产品检测系统来控制产品装配和成品检测的每一环节；以圆度仪、电感测微仪等精密的辅助设备来控制设备运行和运行过程的精确性。

The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.

哺乳动物26S蛋白酶体是由一个20S催化颗粒(catalytic particle，CP)和两个19S调节颗粒(regulatory particle，RP)组成的ATP(adenosine-triphosphate，ATP)依赖性蛋白水解酶复合体。20S CP是26S蛋白酶体的催化核心，它是由4个圆环堆叠形成的桶状复合物，其中两侧外环每个环是由α_1-α_7亚基组成，两个内环每个环是由β_1-β_7亚基组成，4个环的中央形成一个狭窄的内腔。2个β内环形成了20S CP的催化中心空腔，其内壁为催化活性位点所在地；外侧α环中心的孔道是底物到达催化中心空腔的通道，一般被α亚基上的N末端所封闭，阻止胞内非目的靶蛋白进入20S CP内被降解破坏。

Based on the depth research on extension array manifold of uniform circular, for some uniform circular arrays which had subarrays with the nature of rotational invariance and had the nature of central symmetry two ESPRIT algo-rithms were presented, the first algorithm reduced one time of SVD, the second algorithm avoided parameter pairs.

在深入研究均匀圆阵扩展阵列流形的基础上，针对某些均匀圆阵的扩展阵列中含有旋转不变性的子阵列组以及中心对称性质，提出了2种基于均匀圆阵的二维ESPRIT算法，第一种算法减少了一次奇异值分解，第二种算法避免了参数配对。

Company has first-class product testing equipment and production equipment, with the United Kingdom has 3 Units Laser Interferometer and clubs, one in Taiwan and USA OPTODYNE interferometer; Japan produced a high-precision spindle Balancing Instrument, etc.; Taiwan and the United States 1 16 meters-made CNC gantry milling machine; Taiwan and France one of domestic large-scale landing 13 meters milling Church; Japan OKUMA Horizontal Machining Center; many Units CNC gantry machining centers, gantry rail grinding machine, internal and external high-precision grinder, Horizontal Machining Center, vertical machining centers, jig borer, such as high-precision production equipment.

公司有一流的产品检测设备和生产设备，配备有3台英国的激光干涉仪和球杆仪、一台美国光动的干涉仪；一台日本生产的高精度主轴动平衡仪等；一台美国产的16米数控龙门铣床；一台法国产13米大型落地堂铣床；日本OKUMA卧式加工中心；多台数控龙门加工中心、龙门导轨磨床、高精度内外圆磨床、卧式加工中心、立式加工中心、坐标镗床等高精度的生产设备。

Then the system parameters were gain from solving non-linear equation. First, the figure which the circle projecting on the CCD plane by the camera led is proved as an ellipse, and find out the reference point coordinate by calculate the canters of ellipses. Then the system parameters were gained from calculating the formulas in two pictures.

首先证明了参考圆在合适条件下经过相机镜头所成的像是椭圆，通过椭圆的中心求出参考圆的中心，就得到了各个参考点的位置；然后通过各个参考点分别在两个相机坐标系中的位置来确定相机之间位置关系参数，就完成了系统的标定。

The ellipse curre equation of circular image is derived based on the theory of spatial analytic geometry and rotation matrix s representation with unit quaternion then a mathematical model of the distortion error is established which relates the distortion error to the foca length of the used CCD camera,the radius as well as the position and the attitude of the inspected circle directly.

研究三维视觉检测中圆的中心经针孔摄像机成像后存在畸变误差的问题，首先基于空间解析几何理论和旋转矩阵的四元数表示法推导出像平面上投影椭圆的参数方程；然后根据参数方程建立圆中心成像畸变误差的数学模型；最后对影响畸变误差的主要因素进行分析。

Then calculates clearances in radius direction for all kinds of nonparallel degree between input shaft and output shaft, and presents conditions of adjustability. Applies the experimental device, which is developed for this paper research, as example, introduce calculation formulation of overlapping coefficient and pressure angle while the distance between two centers is uncertain, in this way, we get the range of the center distance.

以本论文的实验研究装置为例，引入了中心距不确定状况下的重迭系数、压力角等计算公式，以两齿轮啮合时的分度圆不能相割为最小中心距，以两齿轮啮合的重迭系数不小于1为最大中心距，从而得到相应的中心距范围。

The plasma arc generator comprises cathode, two anodes and insulating strip between two anodes, first anode is cylindrical hollow sleeve, the cylinder cathode is placed in the centre of said sleeve, and an annular fluid channel is formed between both the lower portion of first anode is equipped with a hole as fluid outlet, and second anode is a circular plate with central hole, between two anodes there is an insulating strip, the diameter of central hole of second anode is less than the diameter of lower hole of first anode.

本发明是一种串式多级压缩等离子弧发生器，由阴极、两阳极及阳极之间的绝缘片组成，第一阳极为圆柱形空心套管，圆柱体阴极处于该套管中心，并在两者之间形成环状流体通道，第一阳极下部是一个供流体出口的横截面为圆的孔，第二阳极是中心开孔的圆形板，两阳极之间有绝缘片，第二阳极中心孔的直径小于第一阳极下部孔的直径。

Our company specializes in the creation of the valve handwheel, handle, bevel gear, worm gear boxes, valve stem, nuts and various valve accessories enterprise can also be in accordance with customer requirements, order a variety of different specifications of hexagonal, square heart, round hole Size of hand wheel of the Company since its inception has been committed to product innovation, and constantly develop new products, our customer-centered and quality as its core business philosophy, in order for the company's products to better serve the society serve the public, the company's strict production management system, continuous introduction of new technologies, new materials, new techniques, and is equipped with a set of complete machining equipment and sophisticated testing equipment to create the link axis hand wheel, hand wheel Fang, keyway hand round, hexagonal hand wheel, lever ball valve, butterfly valve handle, valve bevel gear, worm gear box, is the Quartet SL101-F type, cone Quartet SL101-Z type, is the Quartet SL104-F type, flower type is SL105 Quartet , cone Quartet SL-104-Z-type, hexagonal SL104-L-type, hexagonal SL101-L type, round type keyway SL101, SL104 keyway circular type, is the six-party type SL102, SL101-J-type keyway, keyway SL102-J-type , SL103-J-type keyway, keyway SB101-J-type, the second generation of new hand wheel, BA series bevel gear, WQDX3, QDX3, QDS3-S, QDX3-G, XQDX3, QDX3-CF, FQDX3, SQDX3 part series back to transformation of the valve device manually, QDX3-C, QDX3-D series valve electric part of the transition back to devices, valve cover series, bearing gland series, the electric-type bearing cap, with a round open cap, sealing the Block series, hand - hard hat round shields hexagonal locking nut series of the Company follow the "survive on quality, reputation and development" business philosophy and the integrity, service, communicate, progress, development.

本公司自创建以来，就一直致力于产品的技术创新，不断开发新产品，秉承以客户为中心，以质量为核心的经营理念，为使公司的产品能更好的服务于社会、服务于大众，公司实行严格的生产管理制度，不断采用新技术，新材料，新工艺，并配有一整套完善的机械加工设备和检测设备制造出精良的连轴手轮，方心手轮，键槽手轮，六角手轮，球阀手柄，蝶阀手柄，阀门伞齿轮，蜗轮箱，正四方SL101-F型，锥四方SL101-Z型，正四方SL104-F型，正四方SL105花型，锥四方SL-104-Z型，六角SL104-L型，六角SL101-L型，圆型键槽SL101型，圆型键槽SL104型，正六方SL102型，键槽SL101-J型，键槽SL102-J型，键槽SL103-J型，键槽SB101-J型，第二代新型手轮，BA系列伞齿轮，WQDX3，QDX3，QDS3-S，QDX3-G，XQDX3，QDX3-CF ，FQDX3，SQDX3系列部份回转型阀门手动装置，QDX3-C，QDX3-D系列部份回转型阀门电动装置，阀瓣盖系列，轴承压盖系列，电动型轴承压盖，圆开帽，上密封座系列，手轮护罩拼帽系列六角锁紧螺母系列本公司遵循&以质量求生存，以信誉求发展&的经营理念和诚信，服务，交流，进步，开拓。

The garden, which was slightly arched, had in its centre, on the summit of a hillock, a fine pointed and conical fir-tree, whence ran, as from the peaked boss of a shield, four grand alleys, and, ranged by twos in between the branchings of these, eight small ones, so that, if the enclosure had been circular, the geometrical plan of the alleys would have resembled a cross superposed on a wheel.

园里的地面是微微隆起的，中间有个稍高部分，一株美丽的圆锥形的枞树耸立在那上面，宛如圆盾中心的突刺，四条宽道从那中心出发，伸向四方，每一条宽道又都有两条小路，各向左右分展出去，各各相通，因此那片园地，假使是圆的话，那些道路所构成的几何图形就象一个加在轮子上面的十字架。

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。