一种身份证图像自动识别中文字定位与分割的方法

针对扫描后的身份证图像存在纹理及背景等强烈干扰，详细探讨了利用数字图像处理技术对身份证上的文字信息进行定位与分割的一种方法。该方法通过对身份证的特征的研究，利用水平投影与垂直投影相结合的方法，首先确定出文字的大致区域，然后利用模板框准确的定位出文字的位置。实例表明所提出的方法行之有效。     

WiNDOW 3.0单晶体取向分析系统

该软件提供了对单晶体取向的快速分析方法。对于背射劳厄法、透射劳厄法和衍射仪法都适用。最后取向结果以极射赤面投影表示,可以长期保存。该软件用C语言(Microsoft C6.0)编写,在窗口环境(Microsoft Windows 3.0)下运行,有优良的用户界面。     

阴极电弧沉积多元合金膜层的织构及其形成

采用阴极电弧沉积方法，制备了与靶材成分基本相同的多元合金Inconel625膜层[1]。用XRD，SEM，TEM研究了不同入射角下所获膜层中的织构分布及其成因。     

On simultaneous shape and orientational design for eigenfrequency optimization

Plates with an internal hole of fixed area are designed in order to maximize the performance with respect to eigenfrequencies. The optimization is performed by simultaneous shape, material, and orientational design. The shape of the hole is designed, and the material design is the design of an orthotropic material that can be considered as a fiber-net within each finite element. This fiber-net is optimally oriented in the individual elements of the finite element discretization. The optimizations are performed using the finite element method for analysis, and the optimization approach is a two-step method. In the first step, we find the best design on the basis of a recursive optimization procedure based on optimality criteria. In the second step, mathematical programming and sensitivity analysis are applied to find the final optimized design.     

On Surface Finish and Dimensional Accuracy of FDM Parts after Cold Vapor Treatment

Fused deposition modeling (FDM) process is an additive manufacturing technology where objects are manufactured in layers. In the present days, FDM is commercially used to build prototypes, functional components; however, these parts majorly suffer from poor surface quality and dimensional accuracy even for basic part geometries. In the present paper, first the effect of part deposition orientation on surface finish and dimensional accuracy of FDM parts are studied. The part selected for this study is designed in such a way that different primitive geometric features at different directions are present. The parts are built at different orientations (0°, 15°, 30°, 45°, 60°, 75°, 90°) using acrylonitrile butadiene styrene P430 material, and surface finish and dimensional accuracy are measured at different surfaces. Next, the FDM parts are postprocessed by cold vapor treatment of dimethylketone (acetone) and improvement in surface finish and change in dimensional accuracy are investigated. The results show that surface finish of the components is greatly improved by this vapor treatment process with minimal variations in part geometric accuracy after the treatment.     

Photoluminescence and photoconductivity studies of oriented polyfluorene thin films

Photoluminescence and photoconductive properties of poly(9,9-dioctylfluorene) (F8) on rubbed polyimide (PI) alignment layers have been studied. The F8 thin films are highly oriented, which is manifested from polarized absorption, fluorescence, and photoconductivity spectra (the order parameter of F8 is 0.86). The ratio of photocurrent parallel to perpendicular directions to the rubbing direction (photoconductivity anisotropy) is 18 at 2.9 eV for F8. Effects of C₆₀ addition to F8 on the optical properties are also studied. C₆₀ addition to F8 significantly increases photoconductivity but decreases the order parameter (0.67) and the photoconductivity anisotropy (7 at 2.9 eV). Both F8 and C₆₀ doped F8 thin films exhibit similar photoconductive response and similar photoconductivity anisotropy (3-4) above 3.8 eV.     

工业机器人任务空间复杂姿态平滑过渡技术

针对工业机器人任务空间姿态轨迹过渡问题,提出了用三次均匀样条四元数插补算法来构造姿态过渡曲线。能够根据给定的任意复杂姿态曲线和过渡点,通过反解出控制点和节点向量得到姿态过渡曲线;通过计算生成样条四元数过渡曲线曲率,进一步得证曲线具有C~2连续性。结果表明:所用算法能够精确地实现工业机器人任务空间姿态平滑过渡,并通过曲率分布图验证了过渡曲线的C~2连续性。     

基于CJ系列PLC多轴伺服控制系统设计

以CJ系列PLC和定位模块为控制核心,采用安川伺服电机,设计了18轴安川伺服控制系统,讨论了系统硬件设计,介绍了系统地址分配和数据传输、NC434和伺服控制器的接线图和伺服参数设置、相关PLC程序、运动中响应偏差处理。系统运行结果证明:该系统稳定、精度高,有良好的应用价值。     

扁丝及其编织品的几个工艺及设计问题探讨

本文讨论了扁丝生产几个工艺参数对扁丝性能的影响，并提出了扁丝及编织物的八个经验公式。     

Effect of polyacrylic acid (PAA) binder system on particle orientation during dry-pressing

Effect of polyacrylic acid (PAA) binder system on the development of particle orientation during uniaxial pressing is reported. Granules of different properties were compacted using uniaxial pressing at various pressure and their degree of particle orientation (DPO) was determined. The increment trend of DPO varies with granule strength and shows higher value for binder system of higher flexibility. Anisotropic shrinkage related to particle orientation is shown by compact of higher relative density (RD) and DPO; whereas anisotropic shrinkage related to non-uniform packing density is shown by compact of lower RD and DPO. Anisotropic shrinkage remains in the former compact while isotropic shrinkage was obtained for the latter compact at sintering temperature of 1600 °C. Subsequent cold isostatic pressing increases DPO and sintering shrinkage ratio of uniaxially pressed compacts.