老挝勃拉邦省爬奔金矿独立坐标系统建立方法研究

本文以老挝爬奔金矿为应用案例,阐述如何运用采集的WGS-84为框架,通过GPS静态测量技术布设E级GPS控制网,建立整个矿区统一坐标系统。     

地面三维激光扫描技术在工程测绘中的应用

介绍了三维激光扫描技术的原理,数据的采集和相关数据的处理方法,给出了三维激光扫描技术和控制测量相结合的坐标转换,从而获得扫描目标的当地坐标,并结合实例说明了应用三维激光扫描技术实现地形测绘的方法及流程。     

GPS和GIS在金堆城露天矿边坡监测预警系统中的应用

介绍了基于GPS和GIS的边坡监测系统在金堆城露天矿的设计技术路线和实际应用。GPS具有速度快、全天候、自动化、可同时测定点的三维坐标及精度高等优点,结合GIS技术和网络通信技术,实现了对矿区地质灾害数据的全天候无人采集、自动快速传输、实时结算处理、监测信息可视化以及短信群发式预警。     

北京54坐标系向国家2000大地坐标系的转换

2000国家坐标系统提高了测量的绝对精度,并且可以快速获取精确的三维地心坐标,能够提供高精度、地心、实用、统一的大地坐标系,自此以后的测量成果要求坐标系统采用2000国家大地坐标系,本文就北京54坐标系和2000国家大地坐标系原理和转换方法进行简单的分析。     

基于非正交轴系架构的新型坐标测量系统解决方案

围绕非正交轴系全站仪坐标测量系统,针对其测量误差问题的解决方案进行了分析。依照非正交轴系全站仪坐标测量系统的结构特征,建设相关测量模型,并采用数学方法对其进行误差分析;采用GUM评估方法对坐标测量系统的测量不确定度进行评估,最终采用仿真技术得到结论,再针对结论提出相应的解决方法。     

1980西安坐标系向CGCS2000国家大地坐标系转换方法研究及应用

因历史原因,部分企业、单位仍在使用1980西安坐标系等多个坐标系进行测量工作,为实现矿区坐标系统和CGCS2000国家坐标系统的协调一致,需就1980西安坐标系下的矿区测量坐标数据及图件成果如何转换至CGCS2000国家大地坐标系所采用的方法进行研究。     

煤自动采样系统在焦化厂的应用

叙述了煤自动采样控制系统在天铁集团焦化厂的应用情况.通过采样机正上方摄像机实时采集的图像,计算机、PLC标定、运算转换形成物理单位如毫米的平面坐标系,随机生成采样坐标点,采样车通过计数开关、行程开关自动定位到相应的坐标点,完成自动采样过程.自动采样设备运行稳定,效果良好,提高了采样的工作效率.     

智慧型矿山坐标系统转换的关键技术研究与应用

本文研究了智慧型矿山测绘领域中坐标系统转换的关键技术,总结了常用的坐标系转换方法和算法,并探讨了基于GIS的坐标系统转换技术、数据质量与精度控制技术、高精度地形表征与建模技术以及基于机器学习的坐标系转换模型优化等关键技术。通过实例验证了相关方法的有效性,为智慧型矿山测绘中坐标系统转换的实际应用提供了参考。本文的研究成果对提高矿山测绘工作效率和精度,促进智慧型矿山建设具有一定的实际意义。     

工业机器人单目双视的应用研究

工业机器人单目双视系统是充分利用机器人位姿便于调整的优势,在机器人带动摄像机一起运动过程中,对包含工件的场景进行多次图像采集,实现目标点三维坐标的识别.介绍了机器人摄像机的非线性快速补偿算法的定标原理,给出了机器人单目双视三维检测实验.单目双视结合工业机器人控制软件,既可使工业机器人能实时地调整运动轨迹,也可对工件进行非接触测量,从而提高了工业机器人的适应性和灵活性.     

基于双目视觉的嵌入式三维坐标提取系统

针对汽车辅助倒车和泊车系统的需求,提出了一种基于嵌入式处理器ARM11和Linux操作系统的双目立体视觉三维坐标提取系统,给出了系统的硬件和软件设计方案,并详细论述了坐标提取算法.在搭建的测试平台上,测试了坐标提取算法以及测量误差和测量范围的关系.实验结果表明,在0.5～1.6 m范围内,深度测量误差小于1.2%,能满足应用的精度要求.与基于PC机的双目视觉测量系统相比,该系统的价格和功耗明显降低,且体积也明显减小.该系统的实现对双目视觉技术的实用化有一定的推动作用.     

Horizontal Sigma Coordinate System for River-Flow Models

Because of complicated channel geometry, horizontal coordinates are important in accurate and efficient computations of river flow. We propose a simplified horizontal coordinate system for river-flow simulation, referred to here as a horizontal sigma coordinate system that uses boundary-fitted grids along river channels like a generalized curvilinear coordinate system, without losing the simplicity of Cartesian or orthogonal curvilinear coordinate systems. The proposed approach is based on a sigma coordinate system. The depth-averaged continuity and momentum equations for horizontal two-dimensional fluid motion in the Cartesian and orthogonal curvilinear coordinate systems are transformed to those in the horizontal sigma coordinate system. The form of the transformed continuity and momentum equations in the proposed system is a fairly minor modification of the form of the equations for the Cartesian and orthogonal curvilinear coordinate systems. Computational results for a straight open-channel flow with a narrow pass indicate that the horizontal sigma coordinate system is as numerically accurate as the generalized curvilinear coordinate system and that the CPU times required to calculate the horizontal sigma and Cartesian coordinate systems are comparable. We also computed flood flow in an actual river using the numerical models based on the horizontal sigma, orthogonal curvilinear, and generalized curvilinear coordinate systems. The results show that the horizontal sigma coordinate system may dramatically reduce the numerical error generated in the orthogonal curvilinear coordinate system. These facts demonstrate that the horizontal sigma coordinate system is a promising tool for numerical approximation of flow in the horizontal direction that is computationally efficient and numerically accurate.     

浅析地勘测量中常用坐标系的转换方法

通过介绍地质勘查测量工作中常见的几种坐标系的定义和相互联系,阐述独立坐标系、54北京坐标系、80西安坐标系、WGS84以及2000国家大地坐标系之间的转换方法和实际运用,并且展望了我国大地坐标系的发展趋势,以三维地心坐标系替代二维参心坐标系,多级网络图取代比例尺地图.     

Cognitive coordinate systems: Accounts of mental rotation and individual differences in spatial ability.

Contends that strategic differences in spatial tasks can be explained in terms of different cognitive coordinate systems that Ss adopt. The strategy of mental rotation featured in many recent experiments uses a coordinate system defined by the standard axes of the human visual world (i.e., horizontal, vertical, and depth axes). Several other possible coordinate systems for solving the problems that occur in psychometric tests of spatial ability are examined. One alternative strategy uses a coordinate system defined by the demands of each test item, resulting in mental rotation around arbitrary, task-defined axes. Another strategy uses a coordinate system defined exclusively by the objects, producing representations invariant with the objects' orientation. Three experiments with 31 university students were conducted to assess differences in strategies used by Ss with high or low spatial ability in cube comparison and Shepard-Metzler (R. Shepard and J. Metzler; see record 1972-28060-001) rotation tasks. Two computer simulation models based on Ss' performance patterns are described. It is suggested that Ss high in spatial ability are faster in their manipulation processes and more flexible in adopting cognitive coordinate systems than their low-ability counterparts. (61 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

转炉倾动力矩计算分析

利用Pro/E三维绘图软件,将影响转炉倾动力矩的主要部件(包括炉液)绘制成三维图形,并将选定的耳轴轴线与炉壳中心线交点位置作为组件坐标系原点位置,按照方便计算的原则选定坐标系,再利用三维软件的强大计算功能提取所需的力学性能参数如质量、重心坐标、转动惯量等,将所有旋转角度下的参数导入到Excel表格中,进行坐标系转换和坐标系旋转的计算,最终计算出不同条件下的倾动力矩值,利用Ex-cel图表功能快速、方便地获得转炉倾动力矩曲线。文中结合实例进行了过程演示和结果对比,将过去只能由专业计算人员来完成的复杂计算工作变成普通设计人员都能做到的事情。     

Mathematical textbook of deformable neuroanatomies

Mathematical techniques are presented for the transformation of digital anatomical textbooks from the ideal to the individual, allowing for the representation of the variabilities manifest in normal human anatomies. The ideal textbook is constructed on a fixed coordinate system to contain all of the information currently available about the physical properties of neuroanatomies. This information is obtained via sensor probes such as magnetic resonance, as well as computed axial and emission tomography, along with symbolic information such as white- and gray-matter tracts, nuclei, etc. Human variability associated with individuals is accommodated by defining probabilistic transformations on the textbook coordinate system, the transformations forming mathematical translation groups of high dimension. The ideal is applied to the individual patient by finding the transformation which is consistent with physical properties of deformable elastic solids and which brings the coordinate system of the textbook to that of the patient. Registration, segmentation, and fusion all result automatically because the textbook carries symbolic values as well as multisensor features.     

矿区独立坐标系的建立方法

一些小型矿山,常处于偏远荒芜的地方,由于测量控制资料的缺乏,需建立独立坐标系以解决相应的测量问题,同时矿用悬挂罗盘仪大量使用于中小型矿山次要巷道的测量。本文就小型矿山独立坐标系中罗盘仪导线和高精度控制导线的坐标统一问题给出了简单而有效的解决方法。     

GPS测量技术结合小三角网建立独立控制网的应用研究

简述了建立地方独立坐标系统的原因和方法,并对各方法的适用性进行了分析。针对在已施工矿区建立独立控制网中需要注意的问题,提出了不改变区域性椭球面及中央子午线利用GPS测量技术结合小三角网建立独立控制网的原理和方法,结合具体工程实例,建立了一种既与国家坐标系有严密参数换算关系,又能保证边长投影变形在规定范围内的地方独立控制网,并和相关数据进行了比较和分析,此方法特别适用于难于联测国家控制点和已经开展工程项目作业的地质勘探项目。     

Object-array structure, frames of reference, and retrieval of spatial knowledge.

Experiments are reported that assessed the ability of people, without vision, to locate the positions of objects from imagined points of observation that are related to their actual position by rotational or translational components. Theoretical issues addressed were whether spatial relations stored in an object-to-object system are directly retrieved or whether retrieval is mediated by a body-centered coordinate system, and whether body-centered access involves a process of imaging updating of self-position. The results, with those of Rieser (see record 1990-03517-001), indicate that in the case of regularly structured object arrays, interobject relations are directly retrieved for the translation task, but for the rotation task, retrieval occurs by means of a body-centered coordinate system, requiring imagined body rotation. For irregularly structured arrays, access of interobject spatial structure occurs by means of a body-centered coordinate system for both translation and rotation tasks, requiring imagined body translation or rotation. Array regularity affected retrieval of spatial structure in terms of global shape of interobject relations and local object position within global shape. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

小型轧钢车间计算机辅助配辊设计初探

介绍了天铁轧二制钢有限公司采用计算机辅助配辊设计,提高了配辊的设计速度和灵活性,使其孔型配置更合理、准确。     

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Thickness of convertor lining is important to guarantee safe production and prolong service life. Based on laser distance measurement technology, a laser thickness measurement system was put forward. Through coordinate transformation, this system can put the measurement point into the model that has already been built, and get the thickness of convertor lining at this point. And the isopachous line of the convertor lining can also be expressed using the coordinate in the two-dimensional figure. Industrial test result shows that the system has high practical value.