利用VisualC舟开发管线数据快速录入软件

管线测绘作业中,外业调查记录及测量坐标等信息的录入是管线数据内业制作及数据入库的起点和基础,但目前的数据录入作业模式存在手工输入量大、冗余操作频繁的缺点。利用VisualC#语言开发了一套管线数据快速录入软件,采用该软件可避免界面切换频繁的弊端,利用连续管线的属性逻辑性智能地实现了属性信息录入的简便,具有实用、高效的优点。     

Double-epoch algorithm in rapid positioning using single frequency GPS receivers

A new algorithm, called as Double-Epoch Algorithm (DEA) is proposed in GPS rapid positioning using two epoch single frequency phase data in this paper. Firstly, the structure characteristic of the normal matrix in GPS rapid positioning is analyzed. Then, in the light of the characteristic, based on TIK-HONOV regularization theorem, a new regularizer is designed to mitigate the ill-condition of the normal matrix. The accurate float ambiguity solutions and their MSEM (Mean Squared Error Matrix) are obtained, using two epoch single frequency phase data. Combined with LAMBDA method, DEA can fix the integer ambiguities correctly and quickly using MSEM instead of the covariance matrix of the ambiguities. Compared with the traditional methods, DEA can improve the efficiency obviously in rapid positioning. So, the new algorithm has an extensive application outlook in deformation monitoring, pseudokinematic relative positioning and attitude determination, etc.     

Moving policy: global and local characters circulating bus rapid transit through South African cities

In this paper, I explore the variety of actors who circulate international best practice around the world. I trace the introduction and adoption of bus rapid transit (BRT) projects and policies across six South African cities through international and municipal policy actors, to expose the role of individuals moving policy within the messy and tangled process of policy circulation. The analysis demonstrates the particularly important role of local actors in localizing global practice. While cities may learn of circulated forms of knowledge through innovative and dynamic individuals, policy is adopted only through local actors with governmental support. This premise adds a critical dimension to the policy mobilities field by demonstrating that adopting localities are instrumental in cultivating a receptive ground for the application of circulated policy. Global best practice does not simply float around waiting to be selected, but rather local policymakers are actively seeking and transforming innovations such as BRT.     

Small Business Establishment Profiles and Rapid Population Growth in Sunbelt Metropolitan Areas, 1995-2005

This study investigates a linkage between rapid population growth in the Sunbelt's metropolitan areas (MSAs) and characteristics of small-scale businesses. Many Sunbelt MSAs are experiencing relatively rapid employment growth that also fuels population growth, and such linkages could well be related to especially potent employment multiplier effects associated with small firms. Using data from the North American Industry Classification System (NAICS) for 2000, relative concentrations of small-scale establishments in rapidly growing Sunbelt MSAs are described and classified by type. Size of MSA appears to be an important factor in supporting higher- and/or lower-order activities, as proposed by the basic principles of central place theory. In contrast, some of the slowest growing Snowbelt MSAs show a lack of small businesses in key economic sectors, particularly quaternary activities, and their economies continue to be dominated by location-specific industries, such as mining.     

基于多时相环境一号卫星CCD数据的植被覆盖信息快速提取研究——以长白山地区为例

选取长白山地区为研究区,利用2009年14期环境一号卫星CCD数据,运用非监督分类方法提取了长白山地区2009年植被覆盖信息,对提取结果进行了精度验证并与单期TM数据提取结果进行了对比分析.研究表明,多时相环境一号卫星CCD数据能够快速准确地提取植被覆盖信息,总体精度为84.67％,Kappa系数为0.82,总体精度和单个植被类型精度均高于单时相TM数据;多时相环境一号卫星CCD数据能区分出常绿针叶林和落叶针叶林,且分类结果景观破碎度较低;长白山地区以针阔混交林为主,占区域总面积的40.84％,植被呈明显的垂直地带性分布.     

新型快速锚固锚索的研发及应用

介绍了直立高填方区边坡治理工程中应用的一种新型的快速锚固技术———预应力混凝土管水平向快速锚固锚索的研发过程,阐述了其力学原理及其构造、特性,并结合工程实例,介绍了新型快速锚固锚索的实施过程及技术要点。     

Matlab在天津市强震动台网烈度速报中的应用

通过Matlab软件平台开发了相应的使用程序,能充分调用不同厂家提供的各式解码程序以及发挥Matlab优秀的界面操作与做图功能,解决了天津市强震动台网强震数据解码过程中断、数据批量成图及数据通道选择、峰值提取及仪器烈度转换、烈度结果发布等基础技术问题,使速报速度由几个小时缩短到几分钟.介绍了其中的技术难点并用实例说明Matlab在天津市强震动台网烈度速报中应用的可行性.     

数据库驱动的专题海图快速制图研究

论证了专题海图应急保障的特点和重要性,提出了面向快速出图的基础地理专题数据库建设,针对越来越重要的专题海图的应急制图保障工作,提出了相关技术的研究方向,并给出了快速出图平台的框架与功能设计,为专题海图的应急制图保障工作提供了技术参考。     

“协优”成矿预测方法的理论探索与实践

根据西藏野外地质工作难度大、工作程度极低、找矿信息少且获取极其困难这一实际, 在认真学习、吸收前辈成矿预测理论精髓及大量找矿实践和理论思考的基础上, 基于系统性、关联性、目标一致性、不充足判据的充足化、复杂与精确的反比性原则, 提出了西部工作程度极低地区快速逼近找矿目标的“协优”成矿预测法, 即只要优选出少量相互关联、目标一致、最能揭示某种类型成矿本质特征的关键信息组合, 就可能导致该类型矿床被发现.强调直接信息的先导作用及少数相互关联信息的明确指示意义, 突出信息与预测目标的一致性, 这样可有效减少信息的不确定性和多解性, 从而降低找矿风险.试图从另一个视角、另一种思路来认识和探讨西部工作程度极低地区的成矿预测问题.该方法应用于冈底斯、北喜马拉雅及念青唐古拉等成矿带的勘查实践, 找矿取得了巨大突破.这对促进冈底斯相邻地区乃至整个西部地区的找矿评价、技术方法进步等具有重要的参考与借鉴意义.      

A RAPID MAPPING SYSTEM IN CHINESE ACTIVE FAULT SURVEY PROJECT

Active fault survey, which is one kind of fundamental researches for reducing disaster risk from earthquake, has been implemented by multiple governmental agencies since the early 1990s in China. Chinese government sponsored some active fault survey projects these years. These researches and projects use a series of thematic maps to describe their processes, results and achievement. Since geography information science was introduced in late 1990s and applied since 2000s to these active fault survey projects, seismologists and experts began to draw thematic maps by this new technology. A convenient and fast way for seismologists and experts to produce atlas of active fault survey products is an important accelerator to achieve these projects.This paper studies on the rapid methodology of producing active fault survey atlas, which is basically built on the processes and contents of active fault projects in recent years, and introduces the methodology on two aspects of standardization and software development. This study has been applied to the ongoing active fault survey projects, and resulted in more effective process, normative data and beautiful atlas. Thus these researches will be easier to be used in future application such as publication, internet sharing, and city development. This methodology has reference value to similar map-producing system in standardization and software development.