双角的

A systemic research on the birefringence of side-hole fiber is presented. The research results show that the birefringence of circular-core side-hole fiber relies mainly on stress birefringence, its fast axis is parallel to the link line of the two holes, and its intrinsic birefringence increases exponentially with the angle and ellipticity of side holes.

本论文的主要研究结果和创新在于： 1、对边孔光纤的双折射特性进行了系统研究，提出圆芯型边孔光纤以应力双折射为主，两边孔连线方向为其快轴方向，其双折射大小与边孔张角和边孔椭圆度成指数关系。

The working method of rotary inductosyn functioning as anglemeasuring component was put forward emphatically,that is singlephase excitation biphase output amplitude discrimination signal processing technique. The theory and the component of this method was also put forward,at the same time, confirmation of Angle measuring system technical parameter,error analysis of Angle measuring system, realization Angle measuring system directive, circuit of measuring control software, programme idea.

重点给出了圆感应同步器作为测角元件的单相激磁双相输出的鉴幅型信号处理的实现方案，以及该方案的原理和组成，测角系统各技术参数的确定和测角系统的误差分析，测角系统各指令的实现，测控软件的流程和编程思路。

This factory's main products cre:double-spoke hand mheels,five-pointed-star-shaped knobs,arrow-shped handles,Tshaped handies,ect.,more than thity series,over two hundred special rubbr pats,nylonplasdic parts,it is also possible for this facty to produce and make all kinds of non-atsndard operating parts and special-shapediai-shpepedsealing parts according to the requireements of the customers.

弓行拉手、内波纹手轮、背波纹手轮、圆轮缘手轮、双幅条手轮、双柄手轮、小波纹手轮、镀铬手轮、手柄球、长手柄套、转动手柄、可折手柄、可调位手柄、方形拉手、椭圆拉手、星形手柄、碟形手柄、三角箭形把手、椭圆手柄套、铣床手轮、GB4141.23波纹手轮、小手轮、平面手轮、带可折手柄满幅手轮、表盘满幅手轮、把手、十字把手、压花把手、通孔把手、定位把手、T形把手、直纹把手、捏手、三棱把手、偏转旋钮、手柄套、小转动手柄、锥柱手柄、球头手柄、单柄对重手柄、双柄对重手柄、外方卡盘扳手、摇手柄、手柄座、锁紧手柄座、圆盘手柄座、4501分度盘、4502大把手、586刻度盘、工作灯、手柄杆、压配式油标、旋入式六角圆形油标、长型油标、圆形长拉手、等三十多种系列，二百多种规格，满足不同用户的需要，生产制造各种机械封件，特种橡胶件，尼龙塑料件，也可根据用户需要，生产制造各种非标操作件，异形密封件。

A variety of ordered bulk phases, including lamellae, hexagonally packed cylinders, body-centered-cubic spheres, and a bicontinuous network structure called Gyroid are observed for diblock copolymers.

在熔体状态下，双嵌段共聚物可以自组装形成包括层状相、六角排列柱状相、体心立方球状相和双连通Gyroid相的一系列稳定有序结构。

Results Irregular symmetrical sheets of lesions with low density around bilateral ventricles were seen in all patients and 62 cases around the front horns, 53 cases retral horns and 38 cases beside the ventricles.

结果 ：72例患者 CT平扫均见双侧侧脑室前后角及体部旁或半卵圆中心区脑白质大小不等斑片状不规则的大致对称的低密度影，发生在侧脑室前角周围 6 2例，后角周围 5 3例，侧脑室体旁 38例，半卵圆区 19例，伴有腔隙性脑梗死 4 1例。

Keratinase can degrade disulfide bonds in the keratin obviously,and make it hydrolysable,which can effectively solve the problem of serious pollution in the traditional unhairing process in leather-making industry.

角蛋白酶可以特异降解维系角蛋白结构的双硫键，使角蛋白发生水解，从而达到使动物皮脱毛的目的，因而能够从根本上消除传统制革工业硫化碱脱毛产生的严重污染。

Methods Acetabular index,CE angle,acetabuar head index and acetabular depth were carefully measured on roentgenograms of 120 developmental dysplasia of the hip cases over 5 years post-operation and 120 normal children whose age were similar to sick children as control group during following-up.

方法对比120例术后5年以上的双髋X光片和随机选择的与随访时年龄相近的120例正常的双髋正位X光片，仔细测量髋臼指数、CE角、臼头指数和髋臼深度，对单侧者还进行双侧对比测量。

9 Class from P0-P2 level, medical equipment bearings, wheel bearings (four points, cross-, three-row, double row, ball columns mixed) large-scale, large deep groove ball bearings, cylindrical roller bearings, spherical self-aligning roller bearings, angular contact ball bearings, tapered roller bearings, thrust ball and thrust angular contact ball bearings, thrust cylindrical roller bearings, thrust tapered roller bearings, Thrust Self-aligning roller bearings, wheel bearings and inch tapered bearing with special structure and non-standard and dozens of types, and can be processed inside diameter Φ150 ~Φ5000mm bearings.

0，1，2，3，4，5，6，7，8，9类从P0-P2级，医疗器械轴承，转盘轴承（四点，交叉，三排，双列，球柱混合）大型，特大型深沟球轴承，圆柱滚子轴承，球面调心滚子轴承，角接触球轴承，圆锥滚子轴承，推力球和推力角接触球轴承，推力圆柱滚子轴承，推力圆锥滚子轴承，推力调心滚子轴承，转盘轴承和英制圆锥及非标准特殊结构轴承等几十种类型，可以加工内径Φ150～Φ5000mm的轴承。

Chirp scaling algorithm is considered more efficient and widely applicable when the bistatic SAR system is in side-look or small squint angle mode,but in large squint angle case,the errors caused by Taylor expansion are so large that the algorithm could lose its precision.In such a case,an equivalent mono-static SAR range mode which has fewer errors than Taylor expansion with large squint angle is proposed to substitute the range history of bistatic SAR.Then bistatic SAR images with large squint angles are gotten by common Nonlinear CS algorithm.The effectivity of the method is verified by Matlab simulation.

在正侧视或小斜视情况下，CS算法具有较好的聚焦性能和广泛的适用性，但在斜视角较大的情况下，该算法将散焦而不能成像，因而提出了用等效的单基地距离模型来代替双基地距离历史的方法，解决了大斜视角情况下距离模型二阶近似误差较大的问题，并结合单基地非线性CS算法，实现了在大斜视角情况下的基于GPS反射信号的双基地SAR高精度成像，最后通过Matlab仿真进行了验证。

a system of along-track mode sar based on the gps is established.by seeing the gps signal as a chirp,chirp scaling algorithm of this mode with large squint angle is investigated.chirp scaling algorithm is considered more efficient and widely applicable when the bistatic sar system is in side-look or small squint angle mode,but in large squint angle case,the errors caused by taylor expansion are so large that the algorithm could lose its precision.in such a case,an equivalent mono-static sar range mode which has fewer errors than taylor expansion with large squint angle is proposed to substitute the range history of bistatic sar.then bistatic sar images with large squint angles are gotten by common nonlinear cs algorithm.the effectivity of the method is verified by matlab simulation.

摘 要：建立了基于gps的顺轨sar系统模型，通过将gps信号等效为chirp信号，研究了在该模式下的大斜视角chirp scaling算法。在正侧视或小斜视情况下，cs算法具有较好的聚焦性能和广泛的适用性，但在斜视角较大的情况下，该算法将散焦而不能成像，因而提出了用等效的单基地距离模型来代替双基地距离历史的方法，解决了大斜视角情况下距离模型二阶近似误差较大的问题，并结合单基地非线性cs算法，实现了在大斜视角情况下的基于gps反射信号的双基地sar高精度成像，最后通过matlab仿真进行了验证。

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