基于曲率的点云数据配准算法

Curvature-based registration algorithm of point clouds data

路银北 张蕾 普杰信 杜鹏

为了实现不同视角下测得的数据的多视定位，提出一种点云数据配准算法。该算法针对近邻内的点，采用二次曲面逼近的方法来求得每个点的曲率，并根据曲率的Hausdorff距离来寻找有效点集，建立名义上的对应关系，最后用四元组法来求得坐标变换，把数据统一到一个坐标系下。该算法利用曲率的性质准确判断对应点集，解决了任意多视点云的拼合问题，试验结果验证了其有效性和精度。[著者文摘]

A 3-D measuring data registration algorithm was proposed in order to locate the different-view-measured cloud data without clear corresponding relation. In the algorithm, a local parabolic surface was fitted to each neighbor point. The curvature of each point was estimated according to the point and its neighbor points, using Hausdorff distance as measurement criterion. Thus a nominal correspondence was created between the control point set selected from the different positions in the overlapped view area. Then the rotation matrix and translation vector were deduced by quaternion method. The corresponding point sets were judged according to the characteristics of curvature, and the problem of combining arbitrary multi-view point clouds was solved. Experimental results show the accurate and robust performance of the proposed algorithm.[著者文摘]

利用二分查找法排除故障3例

靳亮

在维护时采用二分查找法能快速找到故障点,方法是：在线段AB间,A是前端,B是终端,当B端信号出现质变时,取AB中间切入点C,判断AC间或CB间是否隐藏故障点,如果是AC间,再取AC中间切入点作检测点,如此重复直至找到故障点加以排除.以下是笔者在维修中运用二分查找法的几个案例：[第一段]

中文图书验收的几点心得体会

徐美兰

本文结合在实际工作中的经验体会,总结了图书验收过程中的一些常见问题及一些验收技巧。[著者文摘]

Q来A去

Q湖南 张凯荣：如何判断屏幕是否有坏点？如果发现有坏点怎么办？ A目前坏点主要还是靠肉眼采识别。推荐使用Displayx，点击“纯色”即可使全屏保持纯色。在全屏黑色的情况下，如果屏幕上有白点，即是亮点；同样，在全屏白色的情况下，如果屏幕上有黑点，即是暗点；在全屏红色，绿色，蓝色的情况下，如果屏幕上有颜色不同的点，即是彩点。以上三种，我们就统称坏点。[第一段]

判断点与多边形位置关系的算法综述

The Summarize of Algorithm for Judgment of Relations between Polygons and Points

王润科 张彦丽

在GIS中。点与多边形位置关系的判断是GIS的重点和难点之一，对于这种关系的判定有很多种方法，本文重点总结在矢量空间中目前常用的几种方法，这些方法都是基于空间的定量计算,最后对这些方法进行了比较．[著者文摘]

The method to judge the relation between the polygon and point is one of the emphases and difficulty in GIS. There are many methods to judge it. This paper emphasizes on summarizing one of the methods,and this method is based on spatial quantitative count. Finally this paper compares these methods.[著者文摘]

INFI-90系统热电阻信号保护逻辑的改造

Improving on Protection Logic of INFI-90 System Thermal Resistance Signal

李峰 李奕钢

针对INFI-90系统热电阻测量回路在信号断线或信号接线松动时热电阻显示最大值，容易造成保护误动作问题提出了解决方案，对其他使用INFI-90系统的电厂有一定的借鉴意义。[著者文摘]

In view of INFI-90 system thermal resistance measurement circuit becomes less crowded when the signal broken line or the signal wire loosing the thermal resistance demonstration maximum value, easy to create the protection to move the question to propose by mistake the solution. For other power plant which used INFI-90 system to have offer instructions to significance.[著者文摘]

教学资源评价探析

The Analysis on the Evaluation of the Teaching Resources

张晓华 陈曦

判断院校教学资源建设的优劣，需要通过对教学资源进行全方位的科学评价．本文分析了评价的分类厦其作用，论述了应该从哪些方面对教学资源进行评价。[著者文摘]

The evaluation of the construction of teaching resources in a college needs the all-round scientific evaluation of teaching resources. This paper analyzes the classification of the evaluation as well as the uses of the classification. And it also expounds the aspects that should be evaluated.[著者文摘]

HACCP在速冻即食食品加工中的应用

Application of HACCP System in the Production of Quick-frozen Instant Foods

韩耀明 郑志勇 张斌

以HACCP的概念及原则，分析了速冻即食食品的关键控制点。列举了HACCP在速冻春卷流程工艺加工中的应用实例。在对危害分析的基础上。确定原料验收，热烫和金属探测为其关键控制点。[著者文摘]

The critical control points in the production of quick-frozen instant food, such as quick- frozen instant Spring Roll, were analyzed with HACCP principles. And raw material checking, blanching and metal detecting was identified as the critical control points.[著者文摘]

圆柱齿轮分度圆压力角的精确测绘方法

A Precise Method for Mapping Pressure Angle in Pitch Circle of Cylindrical Involute Gear

黄富贵 张认成

针对传统的圆柱齿轮分度圆压力角测绘精度低，容易产生错误判断等缺陷，采用传统测绘方法与齿形比较法相结合的方法，实现对渐开线圆柱齿轮分度圆压力角的测绘．同时，以实际齿轮分度圆压力角的测绘为例，介绍该方法的实现原理和步骤．结果表明，文中提出的测绘方法，能实现对齿轮分度圆压力角的精确测绘．[著者文摘]

A novel method, which is integrated conventional mapping method with method of comparing tooth shape, is proposed to realize the mapping of pressure angle in pitch circle of cylindrical involute gear so as to overcome the disadvantages brought by the conventional method. Meanwhile, the principle and the steps of the method are presented, and a case study is given in detail, in which the results show that precise mapping pressure angle in pitch circle of gear can be realized by the proposed mapping method.[著者文摘]