用Excel软件绘制试验质量控制图的方法探索

结合实际工作需要,提出试验中常规绘制质量控制图时存在的问题,尝试用计算机软件完成试验所涉及有关质量控制图的绘制方法,为计算机在数据处理和图形处理方面的应用提供参考。     

Stresses in bent copper tubing: Application to fatigue and stress-corrosion cracking failure mechanisms

The residual and applied stresses in u-bent copper tubing are addressed in the context of both cyclic fatigue and stress-corrosion cracking. Failures as a result of fatigue and stress corrosion cracking in u-bent copper tubing have been observed to initiate at nonintuitive locations when only the applied stresses on the component are considered. This paper presents both qualitative classical and quantitative finite-element stress analysis results for the forming of u-bends. The resulting residual stress distributions are compared to fracture patterns generated by both fatigue and stress-corrosion cracking mechanisms.     

《机械制图》作业网络绘图工具开发研究

结合机械制图课网络教学特点，利用ActiveX网络功能开发了两套机制作业网上绘图教学软件。该软件实用性强，自带智能化作业批改功能，为机械制图课远程教学中网络绘图工具的开发提供了新的思路。     

DCS应用系统控制方案组态设计

在DCS系统中，控制方案的实施是一个重要而关键的问题。文章分析研究了DCS应用系统中控制方案的组态设计。在一个复杂的应用系统中，不仅有PVI指示块、PID控制块，还有运算块以及辅助运算块例如数据设定块等。除了这些连续功能之外，常常还有一些顺序控制。如顺控表等。对如何综合运用这些功能，实现DCS应用系统组态设计进行了详细的论述。给出了应用实例。具有一定的实用价值。     

人工神经网络的直线图素识别质量判别器

讨论矢量化直线图素识别质量的判别方法，采用BP网络，网络输入为反映直线图素识别质量的特征因子，网络输出为从斜率、线宽及直线端点的定位精确性等方面对直线图素识别质量的评价，BP网络经训练成为直线图素质量判别器．由于输入到网络中的各特征因子均是与线宽的相对比值，因此，该方法对扫描分辨率的影响不敏感，也很容易推广到其他图素类型．     

金属板材无模成形加工轨迹生成的研究

介绍了一种采用快速原型制造原理的金属板材无模成形技术．根据快速成形技术中分层制造的思想，从板材无模成形的技术特点出发，采用基于STL文件的金属板材无模成形的加工轨迹生成方法，通过构造STL文件的等距模型并对其进行切片，得到加工轨迹。     

基于动态作图的图形符号编辑系统

在对比和总结国内外开发的公式编辑器的基础上，提出了基于动态作图的图形符号编辑系统的形式化模型。依据该模型，对动态作图的基本原理进行了分析，并给出了动态作图的面向对象设计，实现了一个通用的编辑器系统。最后对开发中遇到的问题和难点展开讨论，并介绍了为到达系统的通用性而考虑采用的组件对象技术。     

板式塔总装图参数化绘图研究

板式塔总装图的绘制是板式塔设计的主要工作之一，工作量大。通过对板式塔总体结构特点及其视图表示法的分析总结，结合行业标准及有关规定，将其总装图划分为几种规范化的组件，包括塔体、塔板及开孔结构等部分。根据各组件及总体表达方案的特点建立组件对应的子程序库、数据库、总装图数据文件及相关规则库，在此基础上，提出了板式塔总装图参数化绘图方法，并借助ＡＵＴＯＬＩＳＰ语言在ＡＵＴＯＣＡＤ１２环境中编程实现，提高绘图效率约２０倍。由于板式塔总装图的复杂性，未能解决文字及符号等的自动标注，有待完善。     

Boundary cell-based acceleration for volume ray casting

Several effective acceleration techniques for volume rendering offer efficient means to skip over empty space, providing significant speedup without affecting image quality. The effectiveness of such an approach depends on its ability to accurately estimate the object boundary inside a volume with minimal computational overhead. We propose a novel boundary cell-based acceleration technique for ray casting which skips over empty space by accurately calculating the intersection distance for each ray. Very short distance estimation time is achieved by exploiting a projection template to calculate the parallel-projection values of each boundary cell and the coherency of adjacent cells. Since no hardware acceleration is used, the projection procedure can also be efficiently parallelized. Experimental results are provided to demonstrate the performance of our new algorithm.     

Sensor Fusion System Using Recurrent Fuzzy Inference

In robotic and manufacturing systems, it is difficult to measure the state of systems accurately because of many uncertain factors and noise, and it is very important to estimate the state of systems. We must measure the phenomena of systems by multiple sensors and estimate the state of systems by acquiring information of sensors. However, we can not acquire all of sensor information synchronically, because each sensor has particular sensor information and measuring time. For estimating the state of systems by multiple sensors, a multi-sensor fusion system fusing various sensory information is needed. In this paper, we propose a Recurrent Fuzzy Inference (RFI) with recurrent inputs and apply it to a multi-sensor fusion system for estimating the state of systems. The membership functions of RFI are expressed by Radial Basis Function (RBF) with insensitive ranges. The shape of the membership functions can be adjusted by a learning algorithm. The learning algorithm is based on the steepest descent method and incremental learning which can add new fuzzy rules. The effectiveness of the multi-sensor fusion system using RFI will be shown through a numerical experiment of moving robot and estimation of surface roughness in grinding process.