SolidWorks软件在级进模标准件库建立中的应用

级进模设计中存在大量的标准件，因而级进模CAD系统开发过程中有必要建立具备良好实用性的标准件库。本文介绍了以SolidWorks 2001为开发平台，以VB6．0为编程语言创建级进模CAD系统标准件库的过程。     

异型薄壁零件淬火畸变的控制

分析了异型薄壁零件淬火废品率高的主要原因。采取改进工艺、工装设计及淬火后校正3方面措施，有效控制了该零件的淬火畸变，显著降低了零件淬火的废品率。     

GPU在密码处理领域应用研究

分析了GPU在密码处理领域的应用发展趋势,给出了典型硬件架构设计和软件架构设计,分析了涉及到的关键技术,对GPU在密码处理领域的设计和应用具有参考价值。     

阿尔塔什水利枢纽工程水库诱发地震预测

阿尔塔什水利枢纽工程区域地质及地震环境复杂,根据水库区地质构造特点划分库段,根据地质构造环境及水文地质结构面等级划分进行了水库诱发地震预测,并采用概率统计检验法、建立统计预测模型进行了分析预测,供同行参考.     

同一种ActiveX控件的两种不同绘制方法

在VC＋＋的学习中,很多读者都发现了这样一个问题,对话框提供的控件模型太少,供我们选择的余地有限,在进行窗口界面的设计过程中,想进行有效的个性化的设计,仅仅靠系统为我们提供的默认的控件是不够的,尤其是在进行工程庞大的界面设计过程中。本文就在此基础上提出一种自己的个性化设计方案,建立自己的个性ActiveX控件,并且可以有两种设计方法。     

On fuzzy boundary value problems

The statement that a two-point boundary value problem of fuzzy differential equation is equivalent to a fuzzy integral equation was pointed out by Lakshmikantham et al. and O’Regan et al. Recently Bede gave a counterexample to show that this statement does not hold and he also argued that in many cases two-point boundary value problems have no solutions. Under a new structure and certain conditions we show that a two-point boundary value problem is equivalent to a fuzzy integral equation. We also prove the existence of solutions to the two-point boundary value problem. In some sense, this is an amendment to results of Lakshmikantham et al. and O’Regan et al., and it is an answer to one of Bede’s problems.     

Design of BOM configuration for reducing spare parts logistic costs

This paper proposes an approach to reduce the total operational cost of a spare part logistic system by appropriately designing the BOM (bill of material) configuration. A spare part may have several vendors. Parts supplied by different vendors may vary in failure rates and prices – the higher the failure rate, the lower the price. Selecting vendors for spare parts is therefore a trade-off decision. Consider a machine where the BOM is composed of s critical parts and each part has k vendors. The number of possible BOM configurations for the machine is then k^s. For each BOM configuration, we can use OPUS10 (proprietary software) to calculate an optimum inventory policy and its associated total logistic cost. Exhaustively searching the solution space by OPUS10 can yield an optimal BOM configuration; however, it may be formidably time-consuming. To remedy the time-consuming problem, this research proposes a GA-neural network approach to solve the BOM configuration design problem. A neural network is developed to efficiently emulate the function of OPUS10 and a GA (genetic algorithm) is developed to quickly find a near-optimal BOM configuration. Experiment results indicate that the approach can obtain an effective BOM configuration efficiently.     

一个基于Web日志的用户访问数据分析系统

通过结合网站设计初期的网站结构和典型用例的预先定义,构建一个基于Web日志数据的用户访问数据分析系统。该系统（AS-UAB,Analysis System of User Access Behaviors）通过对网站结构和典型用例的预先植入,利用该领域最新的研究方法和结论,为网站相关人员提供可视化的用户访问信息统计及趋势预测,网站结构设计及交互设计上存在的问题及改进建议等通用功能和个性化定制功能。     

基于半监督聚类的3维肢体分割算法

行为分析已经成为计算机视觉研究领域的热点,行为主体的肢体部件分割是行为分析中很重要的一部分同时也是一个难点问题,为了对3维肢体进行有效分割,提出了一种基于半监督聚类的肢体分割算法。该算法首先利用前一帧姿势估计反馈的时域信息来对3维主体进行初始的肢体部件分割;然后根据人体结构信息进一步确定行为主体上各个点与肢体部件之间的关系来得到半监督聚类的初始值;之后基于各个肢体部件的形状信息进行半监督聚类,迭代求解肢体部件分割的最优解;最后利用分割后的各个肢体部件进行行为主体的姿势参数估计。通过对IXMAS数据库中6种行为下的6个行为主体进行的肢体部件的分割实验结果证明,该新算法具有主体适应性、视角适应性以及行为适应性。     

基于改进ICP的复杂机械零件测量点云配准方法

点云配准是基于机器视觉进行复杂机械零件三维非接触精密测量的关键环节。针对传统迭代最近点(iterative closest point, ICP)算法对初始位置依赖性强,迭代收敛速度慢,错误对应点对多,难以满足大批量复杂机械零件测量点云配准效率和精度要求的问题,提出了一种基于ISS-FPFH(intrinsic shape signature-fast point feature histogram)特征结合改进ICP的复杂机械零件测量点云配准方法。为了减少点云配准数量,并保留点云表面原来的细微特征,提出了基于重心邻近点的体素滤波器对点云进行下采样预处理。为解决传统ICP算法因合适初始位置难以确定而导致多视角测量点云配准失败的问题,采用了基于ISS-FPFH特征的采样一致性初始配准(sample consensus intial alignment, SAC-IA)算法进行粗配准。为解决传统ICP算法迭代收敛速度慢、错误对应点对多的问题,提出结合法向量夹角约束的点到平面ICP算法进行精配准。以斯坦福大学的bunny点云模型为对象,验证了本文提出方法对噪声点云的鲁棒性。以常见的复杂机械零...