矿业权实地核查测量技术方案探讨   总被引：1，自引：0，他引：1  

徐锋  宗强  牟秋颖 《测绘与空间地理信息》2009,32(2)

阐述了葫芦岛地区矿业权实地核查工作的目的、意义和工作依据,并对矿业权实地核查方法、矿权测量、数据整理、数据库建设等具体的工作方法和技术要求进行了探讨.  相似文献   

Behavioural adaptations in talitrids from two Atlantic beaches     

Claudia Rossano  Simone Gambineri  Lucia Fanini  Virginie Durier  Colette Rivault  Felicita Scapini 《Estuarine, Coastal and Shelf Science》2009

The aim of the present study was to test sun orientation and rhythmic activity of two sandhopper populations from two Atlantic macro-tidal beaches. A population from Le Verger beach (orientated to 346°, Ille et Vilaine, Brittany, France) and a population from Damgan (orientated to 195°, Morbihan, Brittany, France), were tested on the beach under clear sky discriminating for landscape vision. For both populations locomotor activity rhythm was recorded in the laboratory. The two beaches differed for climatic features, tidal range and for human use. Both talitrid populations resulted very well orientated toward the shoreline, and both used solar position and landscape vision to orient. However the multiple regression analysis of orientation with climatic features showed a different use of local cues by the two populations and a slight influence of tidal regime (ebbing and rising tide), in spite of the supralittoral zonation of sandhoppers. In the laboratory they showed a well defined rhythmic behaviour as well as a bimodal rhythmicity, explained as a tidal one. These results are a new brick in the complex picture of orientation and rhythm studies on sandy beach invertebrates.  相似文献   

地图综合中建筑物方向的计算方法及适用性分析     

ZHANG Yan  邓敏  LI Zhi-lin 《地理信息世界》2008,6(2):58-64

建筑物的方向是地图综合过程中的一个基本约束,目前仍没有一个计算建筑物方向的统一方法.本文详细阐述了五种常用的计算方法,分别为最长边法、加权平分线法、统计加权法、最小MBR法和基于墙的均值法.并从其基本原理出发,分析了这五种方法的适用性和局限性.通过两个实验设计和实现,进一步例证了这些方法的适用情况和存在的问题,并发现最小MBR方法较为稳健.  相似文献   

桥梁工程跨河水准测量设计与实践   总被引：3，自引：2，他引：1  

郑强  吴迪军  张建军 《地理空间信息》2009,7(4):142-143

系统地分析和总结桥梁工程跨河水准测量的基本理论、方法和技术要点，对各种跨河水准测量方法的适用条件及其优缺点进行分析比较。最后，以某特大型桥梁工程的三角高程跨河水准测量为例进行了验证。  相似文献   

野外型断层活动连续监测系统     

徐春阳  杨江  高平  邓涛  杜为民  吕宠吾 《大地测量与地球动力学》2009,29(Z1):120-121

介绍野外型断层活动连续监测系统的组成、布设及主要技术指标。  相似文献   

规则格网上双方向性插值DEM精度研究     

陈再辉 《测绘工程》2009,18(4):28-31

简要介绍双方向性插值方法的原理，并以线性插值和三次插值过程中的误差传播为基础，利用误差传播定律，推导出双方向性插值方法生成的DEM曲面平均高程误差值，并对线性插值和三次插值公式本身的精度进行分析。  相似文献   

面向应用的高校GIS教学探索与实践   总被引：8，自引：2，他引：6  

党安荣  刘钊  贾海峰 《地理信息世界》2007,5(2):9-14

高校GIS教学是近年来国内探讨的热点教学问题之一,涉及到GIS专业课程体系设置、教学内容设置、实践环节设置、教学体制改革等多个方面;但这些探讨主要是针对GIS专业学士学位与硕士学位教学而引发的,较少关注非GIS专业学位的GIS教学问题.本文通过分析清华大学GIS教学发展与现状,结合作者在GIS教学中的探索与实践,从教学平台、教学内容、授课形式、考试方式、教学效果等几个方面,讨论如何开展针对非GIS专业、面向应用的高校GIS教学模式,与全国高校GIS教育工作者共勉.  相似文献   

Orientation of Galaxies in the Local Supercluster: A Review     

F. X. Hu  G. X. Wu  G. X. Song  Q. R. Yuan  S. Okamura 《Astrophysics and Space Science》2006,302(1-4):43-59

The progress of the studies on the orientation of galaxies in the Local Supercluster (LSC) is reviewed and a summary of recent results is given. Following a brief introduction of the LSC, we describe the results of early studies based on two-dimensional analysis, which were mostly not conclusive. We describe next the three-dimensional analysis, which is used widely today. Difficulties and systematic effects are explained and the importance of selection effects is described. Then, results based on the new method and modern databases are given, which are summarized as follows. When the LSC is seen as a whole, galaxy planes tend to align perpendicular to the LSC plane with lenticulars showing the most pronounced tendency. Projections onto the LSC plane of the spin vectors of Virgo cluster member galaxies, and to some extent, those of the total LSC galaxies, tend to point to the Virgo cluster center. This tendency is more pronounced for lenticulars than for spirals. It is suggested that ‘field’ galaxies, i.e., those which do not belong to groups with more than three members, may be better objects than other galaxies to probe the information at the early epoch of the LSC formation through the analysis of galaxy orientations. Field lenticulars show a pronounced anisotropic distribution of spin vectors in the sense that they lay their spin vectors parallel to the LSC plane while field spirals show an isotropic spin-vector distribution.  相似文献   

Prediction of application scope of vertical fracture strike based on scattered wave fracture orientation function     

TANG Yufei  LIU Yuwei  LIU Xiwu  YANG Guodong 《世界地质(英文版)》2015,18(1)

Fracture system plays a very important role in the enrichment and accumulation of oil and gas in the reservoirs. Based on scattering wave information,Fracture Orientation Function( FOF) was built,which can be used to predict the fracture orientations. However,this method has only been verified by physical experiments without studies on the application scope. In this study,based on the linear sliding theory,FOF of the scattering wave was applied to the numerical simulation and the application scope was further studied according to fracture flexibility tensor. According to the fractures filled with gas and liquid,numerical simulation was conducted on the models with various fracture flexibilities. Numerical simulation results were used to inverse fracture orientation with the aid of the FOF of the scattering wave. The results show that it is workable to predict the vertical fracture orientation with the FOF of the scattering wave. Application of this method is more effective when the fractures are filled with gas than liquid. Moreover,the application scope can be predicted by the fracture flexibility.  相似文献   

Feature detection and description for image matching:from hand-crafted design to deep learning     

Lin Chen  Franz Rottensteiner  Christian Heipke 《地球空间信息科学学报》2021,24(1):58-74

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