Oruxmaps软件结合Global Mapper软件在矿产资源行业并购中的应用

纸质地质图结合手持GPS,采用手工方式野外记录的传统地质调查工作方式已不能适应数字化和信息化的要求,在矿产资源并购项目中,运用Oruxmaps、Global Mapper等软件,可以制作适应地质调查工作所特需的离线地质图,实现地质图、GPS定位、路线轨迹记录、文字记录、影像记录等的有机结合,形成了一套行之有效的工作流程,极大地提高了路线地质调查工作的质量和效率。

基于Global Mapper的测绘图形数据转换

Global Mapper支持多种格式的光栅、高程、矢量数据的读取与输出,并内置多种坐标投影方式。尝试挖掘其支持多种数据格式、多种投影模式的功能,快速实现测绘图形数据的转换。通过设置当前工作空间的坐标投影模式,然后打开任何其支持的、含有坐标投影信息的数据,所有数据均自动转换成当前的投影模式,最后将文件输出(另存为)为所需的格式,即可快速完成数据转换。转换的内容主要包括不同格式的DTM(Digital Terrain Model,数字地面模型)数据转换、相同格式但不同坐标投影之间的相互转换,以及卫星影像配准等。

低空无人机结合Global Mapper在应急测绘中的应用

无人机测绘技术凭借快速高效、性价比高、操作便捷等优势,在应急测绘中得到广泛应用。本文采用大疆精灵4RTK无人机进行摄影测量,通过大疆智图和Global Mapper软件处理影像数据,生成大小合适的图片及纠正范围所需的控制点dwg文件,利用CASS软件绘制地形图。结合实例表明,利用无人机获取的成果数据质量能满足地形图的成图精度要求,方法可行。

基于Global Mapper的地貌晕渲图设计与制作

地貌晕渲图是指利用数字高程模型(DEM)来生成,可以很好地反映地形、地势的变化,具有较好立体感的地图。本文以地貌晕渲基本理论为出发点,利用Global Mapper软件实现对制图数据的地貌晕渲图自动生成。对制图区域内的地形地势特征,地貌晕渲图在计算机上实现的关键技术,整体性考虑对地貌晕渲图效果的影响,合理分析设置Global Mapper软件中的各类参数,并利用Photoshop软件对地貌晕渲图进行调整。

Global Mapper软件在复杂地表条件下的应用

复杂地表条件给施工前的踏勘、施工设计、试验点选择、表层点位布设带来很大的难度,以往只依赖于纸质地形图的施工方法难以满足复杂的施工要求。复杂地表条件下合理的表层点位布设一直是困扰技术人员的难题,特别是二维施工,测网稀、施工范围广、穿过障碍物多,逐条测线踏勘浪费大量的人力物力,提高踏勘效率及提供合理的测线调整方案是地震采集人员急需解决的问题。Global Mapper软件结合数据库及其强大的功能,在复杂地表的施工中,能很好地解决以上技术难题,大大提高了施工效率。

Global Mapper软件在新建铁路预可研阶段选线中的应用

新建铁路项目前期投入较少的人力、物力,缩短项目周期是设计单位所需解决的问题,因此选线过程中快速生成多方案的地形DEM数据模型尤为重要。Global Mapper软件作为一款小型地理信息软件,应用软件专题地图制作功能,可绘制项目地理位置示意图、线路平纵断面缩图,易于操作,出图效率高。该软件支持栅格、矢量、高程数据等多种显示和处理,应用全球免费的STER数据,可以高效生产研究区域内的DEM高程模型,能够达到铁路项目预可研以及部分项目可研阶段的精度要求,具有实用参考价值。

Google earth和global mapper在确定城郊供水加压泵站位置的应用

在农村饮水安全工程建设中,通过利用Google earth添加地标、路径的功能,以及global mapper绘制等高线地形图的功能,并将上述位置及参数布置到工程项目的卫星地图上,直观地表达了项目所在区域的地理信息,为工程科学决策提供依据。

Assessment of International GNSS Service Global Ionosphere Map products over China region based on measurements from the Crustal Movement Observation Network of China

The global ionosphere maps(GIM)provided by the International GNSS Service(IGS)are extensively utilized for ionospheric morphology monitoring,scientific research,and practical application.Assessing the credibility of GIM products in data-sparse regions is of paramount importance.In this study,measurements from the Crustal Movement Observation Network of China(CMONOC)are leveraged to evaluate the suitability of IGS-GIM products over China region in 2013-2014.The indices of mean error(ME),root mean square error(RMSE),and normalized RMSE(NRMSE)are then utilized to quantify the accuracy of IGS-GIM products.Results revealed distinct local time and latitudinal dependencies in IGS-GIM errors,with substantially high errors at nighttime(NRMSE:39%)and above 40°latitude(NRMSE:49%).Seasonal differences also emerged,with larger equinoctial deviations(NRMSE:33.5%)compared with summer(20%).A preliminary analysis implied that the irregular assimilation of sparse IGS observations,compounded by China’s distinct geomagnetic topology,may manifest as error variations.These results suggest that modeling based solely on IGS-GIM observations engenders inadequate representations across China and that a thorough examination would proffer the necessary foundation for advancing regional total electron content(TEC)constructions.

Global mapping of urban built-up areas of year 2014 by combining MODIS multispectral data with VIIRS nighttime light data

An improved methodology for the extraction and mapping of urban built-up areas at a global scale is presented in this study.The Moderate Resolution Imaging Spectroradiometer(MODIS)-based multispectral data were combined with the Visible Infrared Imager Radiometer Suite(VIIRS)-based nighttime light(NTL)data for robust extraction and mapping of urban built-up areas.The MODIS-based newly proposed Urban Built-up Index(UBI)was combined with NTL data,and the resulting Enhanced UBI(EUBI)was used as a single master image for global extraction of urban built-up areas.Due to higher variation of the EUBI with respect to geographical regions,a region-specific threshold approach was used to extract urban built-up areas.This research provided 500-m-resolution global urban built-up map of year 2014.The resulted map was compared with three existing moderate-resolution global maps and one high-resolution map in the United States.The comparative analysis demonstrated finer details of the urban built-up cover estimated by the resultant map.

Building a Post-Layout Simulation Performance Model with Global Mapping Model Fusion Technique

Building a post-layout simulation performance model is essential in closing the loop of analog circuits, but it is a challenging task because of the high-dimensional space and expensive simulation cost. To facilitate efficient modeling, this paper proposes a Global Mapping Model Fusion(GMMF) technique. The key idea of GMMF is to reuse the schematic-level model trained by the Artificial Neural Network(ANN) algorithm, and combine it with few mapping coefficients to build the post-simulation model. Furthermore, as an efficient global optimization algorithm,differential evolution is applied to determine the optimal mapping coefficients with few samples. In GMMF, only a small number of mapping coefficients are unknown, so the number of post-layout samples needed is significantly reduced. To enhance practical utility of the proposed GMMF technique, two specific mapping relations, i.e., linear or weakly no-linear and nonlinear, are carefully considered in this paper. We conduct experiments on two topologies of two-stage operational amplifier and comparator in different commercial processes. All the simulation data for modeling are obtained from a parametric design framework. A more than 5 runtime speedup is achieved over ANN without surrendering any accuracy.

Outlines of New Global Geochemical Mapping Program

Since 1988,great efforts and enthusiasm had been paid by applied geochemists in the implementation of global geochemical mapping through the International Geological Correlation Program＇s Projects 259 and 360,and the Task Group on‘Global Geochemical Baselines＇ established by the International Union of Geological Sciences（IUGS）,in collaboration with the International Association of Geochemistry（IAGC）.But how to use extremely low-density sampling to obtain a global picture of the distribution of most elements in the periodic table in a reasonably short time is still a great challenge faced by the applied geochemistry community.It will depend on the continuous development of new mapping concept,and the advisable and courageous innovation of methodology for searching other suitable sample media and sampling layout.Based on the encouragement results obtained from the representativeness study of delta sediments conducted at the mouth of Yangtze River,and at the mouths of its four major tributary,it is expected to broadly apply the geochemical fractal self-similarity nature to main rivers and their estuaries with catchments up to hundreds of thousands or over a million square kilometers in the world.With this new mapping concept,a new outlines of a Global Geochemical Mapping Program was advanced and the establishment of an International Research Center of Global Geochemical Mapping was also suggested to facilitate the programs implementations.

The global rainforest mapping project JERS-1: a paradigm of international collaboration for monitoring land cover change

The Global Rainforest Mapping (GRFM) project was initiated in 1995 and, through a dedicated data acquisition policy by the National Space Development Agency of Japan (NASDA), data acquisitions could be completed within a 1.5-year period, resulting in a spatially and temporally homogeneous coverage to contain the entire Amazon Basin from the Atlantic to the Pacific; Central America up to the Yucatan Peninsular in Mexico; equatorial Africa from Madagascar and Kenya in the east to Sierra Leone in the west; and Southeast Asia, including Papua New Guinea. To some extent, GRFM project is an international endeavor led by NASDA, with the goal of producing spatially and temporally contiguous Synthetic Aperture Radar (SAR) data sets over the tropical belt on the Earth by use of the JERS-1 L-band SAR, through the generation of semi-continental, 100m resolution, image mosaics. The GRFM project relies on extensive collaboration with the National Aeronautics and Space Administration (NASA), the Joint Research Center of the European Commission (JRC) and the Japanese Ministry of International Trade and Industry (MITI) for data acquisition, processing, validation and product generation. A science program is underway in parallel with product generation. This involves the agencies mentioned above, as well as a large number of international organizations, universities and individuals to perform field activities and data analysis at different levels.

First Global Carbon Dioxide Maps Produced from Tan Sat Measurements

1.The need for global carbon monitoring from space and the TanSat mission Global warming is a major problem,for which carbon dioxide（CO2 ）is the main greenhouse gas involved in heating the troposphere.However,the poor availability of global CO2 measurements makes it difficult to estimate CO2 emissions accurately.

Creation of New Global Land Cover Map with Map Integration

We present here a new approach to the development of a global land cover map. We combined three existing global land cover maps (MOD12, GLC2000, and UMD) based on the principle that the majority view prevails and validated the resulting map by using information collected as part of the Degree Confluence Project (DCP). We used field survey information gathered by DCP volunteers from 4211 worldwide locations to validate the new land cover map, as well as the three existing land cover maps that were combined to create it. Agreement between the DCP-derived information and the land cover maps was 61.3% for our new land cover map, 60.3% for MOD12, 58.9% for GLC2000, and 55.2% for UMD. Although some of the improvements we achieved were not statistically significant, this project has shown that an improved land cover map can be developed and well-validated globally using our method.

THE GLOBAL BIFURCATION STRUCTURE OF A KIND OF DIGIT MAPPING

The global structure of the mapping is studied. The symmetric unconnected substructures of T2 is coincident with [1] by computer, but for n=3 the symmetry of these substructures vanishes. As n is increasing, the global bifurcation structure of Tn is shown. Finally, similar results for the mapping are also proved.

一种可解释的云平台任务终止状态预测方法

基于特征选择和模型可解释方法构建可解释性强的云平台任务终止状态预测模型,该模型可视化任务/作业的静态和动态属性与终止状态之间的映射关系,进而找出负载特征与任务终止状态之间的映射机理.利用Google公开的工作负载监控日志,并加入云平台中任务的动态信息,采用沙普利加和解释(Shapley additive explain,SHAP)找出静态和动态属性对终止状态影响的重要性,利用变量重要性结合SHAP值和XGBoost模型,对任务终止状态预测模型建模后的结果进行解释,使用可视化技术呈现负载特征如何影响模型对不同任务终止状态的预测.用SHAP值绝对值的平均值衡量特征的重要性,实现任务不同终止状态特征重要性的全局可视化,根据结果筛选出对任务终止状态预测模型影响大的20个变量,作为特征筛选的依据;由可视化的结果可知,任务运行过程中,各特征的不同特征值对任务的终止状态有影响,不同特征值对终止状态的产生有不同的影响.特征选择结合模型可解释性方法运用于任务终止状态预测模型的构建流程中,可辅助构建高分类性能及易于理解的任务终止状态预测模型,通过对负载特征与任务终止状态之间映射机理的探索,可以优化云平台的调度机制.

温室植保机器人覆盖式路径规划方法研究

针对温室环境植保作业的特点,提出了一种针对温室植保机器人的覆盖式路径规划方法。首先通过UWB-IMU对机器人位姿进行估计,解决了激光里程计在温室行间失效的问题,并利用位姿估计结果与激光雷达数据融合建立温室地图。设计了作业点和可通行区域识别方法,完成了基于A∗算法的温室植保作业区域全覆盖路径生成方法和基于贝塞尔曲线法的作业路径平滑方法,最终得到了满足温室植保作业要求的全局路径。基于DWA算法对机器人实际作业过程中进行动态规划。最后基于仿真平台CoppeliaSim对上述方法进行了验证,实验结果表明,机器人能有效跟随全局路径,完成覆盖作业任务。

基于锚点的快速三维手部关键点检测算法

在人机协作任务中,手部关键点检测为机械臂提供目标点坐标,A2J(Anchor-to-Joint)是具有代表性的一种利用锚点进行关键点检测的方法。A2J以深度图为输入,可实现较好的检测效果,但对全局特征获取能力不足。文中设计了全局-局部特征融合模块(Global-Local Feature Fusion,GLFF)对骨干网络浅层和深层的特征进行融合。为了提升检测速度,文中将A2J的骨干网络替换为ShuffleNetv2并对其进行改造,用5×5深度可分离卷积替换3×3深度可分离卷积,增大感受野,有效提升了骨干网络对全局特征的提取能力。文中在锚点权重估计分支引入高效通道注意力模块(Efficient Channel Attention,ECA),提升了网络对重要锚点的关注度。在主流数据集ICVL和NYU上进行的训练和测试结果表明,相比于A2J,文中所提方法的平均误差分别降低了0.09 mm和0.15 mm。在GTX1080Ti显卡上实现了151 frame·s^(-1)的检测速率,满足人机协作任务对于实时性的要求。

多视野精细分析下的弱监督目标定位算法

针对多尺度目标定位精度较差,难以捕获完整目标边界的问题,设计一种多视野精细分析模块并融入通道与空间注意力机制抑制背景噪声的干扰,获取多尺度目标的高分辨率特征。利用随机特征选取模块获取特征图随机位置的组合,聚合多个位置图获取最具辨别性的位置及其它位置的信息,融合浅层生成的类激活图与聚合类激活图获取细粒度位置信息,捕获完整的目标边界。与现有的弱监督定位方法相比,在解决多尺度目标定位效果差和局部最优问题上具有一定的优势。

基于改进PSO算法的光伏阵列MPPT研究

为解决传统粒子群优化(PSO)算法在寻优过程中出现粒子早熟、收敛速度慢、易陷入局部优化等问题,提出一种基于反向学习的Logistic-Tent双重混沌映射和时变双重压缩因子(TVCF)策略的改进粒子群优化(LT-TVCFPSO)算法,在传统PSO算法基础上,引入了Logistic-Tent混沌映射和TVCF,既可增强种群多样性,避免粒子早熟,跳出局部优化,又能加快粒子收敛,提升全局寻优能力。最后在MATLAB/Simu-link上进行仿真。仿真结果表明:相比于传统MPPT算法,LT-TVCFPSO算法能够快速准确地追踪到全局最大功率点(GMPP)。