基于PET的ITO薄膜激光刻蚀研究

使用波长为1064纳米的皮秒激光脉冲从前后两侧对PET基体上的ITO薄膜进行刻蚀.通过拉曼光谱仪得到光斑的直径找出焦点并计算该处的光束直径与阀值能量密度.而依据白光干涉显微镜得到光斑的深度可以估算能使ITO薄膜完全移除但PET基体不被破坏的能量密度窗口.实验结果表明,前侧相比后侧具有更小的阀值能量密度和更大的能量密度窗口.     

HAGI, a High-level Application/Graphics Interface

HAGI is an object-oriented graphics system developed on top of the X window system. In addition to providing facilities that structured graphics systems such as GKS usually have, HAGI supports a high- level graphics paradigm with the following features:

• + In addition to graphical objects, the system provides a class of application objects with a higher level of abstraction than graphical objects.
• + Graphics manipulation operations can be issued simplyfrom application objects without explicitly referring to specific graphical objects. Thus graphics manipulation appears to be transparent to application programmers.
• + Graphical objects are designed to encompass more semantics, thus are at a level close to the application. For example, they useflexible visual objects to determine their visual appearance.

HAGI provides such a high-level application/graphics interface by maintaining a dependency relationship between graphical objects and application objects.     

带时间窗的车辆路径问题的离散蝙蝠算法

本文提出了一种离散蝙蝠算法求解带时间窗的车辆路径问题（vehicle routing problem with time window）.该算法提出了蝙蝠位置的定义、速度的定义、位置更新操作、速度更新操作、频率更新操作,并采用惩罚机制与向量比较机制相结合的方法处理相关约束条件.该算法引入了随机插入策略、最少客户车辆插入搜索、普通插入搜索、交换搜索、带时间窗的2-Opt搜索等策略来扩大搜索空间、加强算法的收敛效率.实验结果表明：所提出算法具有较强的寻优能力、较高的鲁棒性、较少的时间耗费;本文所采用的关键参数值和策略能提高所提出算法的性能;通过假设检验证明了所提出算法与对比算法之间的算法性能均有显著性差异.     

不同窗口的电弧光谱信息与焊丝熔滴过渡

用光谱窗口替代光谱仪是实现熔滴过渡电弧光谱信息在线控制的基础。有两种不同的熔滴过渡光谱窗口选择方法：选取以焊丝金属谱线为主的窗口或选取以保护气体元素光谱为主的窗口，不同的光谱窗口所反映的信息不同。通过实际选取这两个窗口，获得了相应的电弧光谱信息，并对这些信息特征进行了分析。结果表明，以焊丝金属谱线为主的光谱窗口光谱信息能很好地反映熔滴过渡过程是因为焊丝金属元素在电弧中的浓度分布直接反映着熔滴过渡，以保护气体元素光谱为主的窗口对电弧中的熔滴过渡反应程度较差是因为保护气体元素粒子浓度只能间接地反映熔滴过渡。要检测电弧熔滴过渡应选择焊丝金属元素谱线密集的光谱波段。     

Stereo vision system on machine tool for automated reconstruction of surface morphology with depth discontinuity

This paper describes a stereo algorithm based on a new variable window for surface morphology inspection and its reconstruction on a machine tool. It has been surveyed that previous stereo algorithms generate large matching errors due to large disparity variations near depth discontinuities. The proposed stereo algorithm devises the variable window in three-dimensional disparity space constructed with match candidate points, which are selected by a correlation function with robust estimator, including line masks. Also, it takes into account intensity variations using intensity gradient-based similarity and then reflects on projective distortion in the variable window to estimate accurate and robust disparities in surface morphology with depth discontinuity. Several experiments show that the proposed technique outperforms closely related stereo methods.     

The development of adaptive modified appearance using operating window methods for optimizing electron beam

The purpose of this article is to address the applications of an operating window with a Taguchi-fuzzy logic design in conducting a reduced number of experiments to yield the optimal conditions and to develop robust melted bead properties of the electron beam (EB) process. The effects of parameters produced on a window on EB bead surface are studied, and dimensions of operating window using travel speed while adding different noise factors are identified. Using ANOVA, significant factors are identified and accounted for nearly 75% of the total variance. The defects can be reduced by widening an operating window. The experimental results show that, an extensive analysis of the quality of the results can be obtained with the successful optimization of functional characteristics. This new strategy allows one to design, simulate, and optimize a system, and accurately performs in a group of characteristics.     

单框双层玻璃窗的热性能分析

对单框双层玻璃窗的传热特性进行分析和测试,其结果表明:此种窗可有效地降低传热系数,在冬季可使内层玻璃内表面的温度提高2～3℃,并节省大量的木材。     

基于波长移相干涉技术的多表面信息分离

利用波长移相干涉技术对平行平板的前后表面同时进行非接触测量在光学检测领域具有重要意义。阐述一种可实现平行平板前后表面干涉混叠信号解相的时域加权算法:加权36步采样算法。首先基于算法原理与约束条件进行了加权多步采样算法的基础分布参数的设计,进而得到前表面、后表面、厚度变化干涉信号的采样权值。利用该权值进行加权操作即可得到各表面初始相位分布。选用泽尼克多项式进行了多表面干涉解相的仿真,模拟的分离结果与真值的最大误差不超过0.06 nm。此外还分析了多种误差对测量结果的影响。论文对这一厚度为20 mm的平行平板开展了测量,验证了该算法在实际测量过程中的有效性。     

基于窗口参数估计的距离扩展目标CFAR检测

雷达在探测目标时,若目标尺寸远大于雷达的距离分辨率,会在距离维上呈现出距离扩展目标特性,采用传统的点目标检测方法因无法利用全部能量而造成检测性能下降。本文针对距离扩展目标检测问题,以外辐射源雷达为背景,首先建立了外辐射源雷达距离扩展目标回波模型,提出了基于最大广义信噪比准则的距离扩展窗口参数估计方法来预估距离扩展目标的位置与宽度;为进一步判断窗口内是否为目标,研究了距离扩展窗口内的模糊恒虚警率（CFAR）检测算法,仿真比较了基于不同积累准则对各类起伏目标的模糊CFAR检测性能,并与传统的二进制积累CFAR比较,表明在均匀噪声环境和多目标环境下,基于模糊代数积积累的模糊CFAR检测性能均最优。最后结合外辐射源雷达舰船目标探测实验的实测数据处理结果,证明了基于模糊代数积积累的模糊CFAR具有最优的检测性能。