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1.
传统的遥感影像解译技术依赖人工判读和半自动化软件解译,使得遥感应用成为以人为主体的劳动密集型工作,很难做到快速的处理效果。随着AI人工智能技术的广泛的应用,应用深度学习算法,建立单一要素提取模型,自动识别提取高分变率遥感影像中所有的建筑物,将会大大提高遥感影像解译的效率和准确性。基于智能遥感解译成果和GIS空间分析,应用于闲置低效用地的自动提取,通过对实验结果进行对比分析,验证了该方法应用于闲置土地预警的可行性。  相似文献   

2.
高分辨率遥感影像的空间几何精纠正是影像处理的一个重要步骤,其空间定位的误差与不确定性已成为遥感与GIS研究的一个热点.高分辨率影像的空间定位误差是在几何校正、地面控制点判读和选取、1:1万地形图上地面控制点的坐标读取等过程中引入的误差而产生的,并导致误差与不确定性从地形图上传播到影像上.为了验证高分辨率影像定位的误差,本文通过使用手持GPS进行野外测点,用实测坐标与SPO丁5(2.5m)遥感影像的同名点的空间坐标进行对比,确定两者的一致性,验证SPO下5(2.5m)遥感影像的空间定位.同时通过两台GPS平行观测,对比同步观测机的数据,分析手持GPS的误差来源以及稳定性对定位精度的影响,并探讨手持GPS测点作为高分辨率影像空间定位的可能性.  相似文献   

3.
尽管国内外已发表了许多利用两个或两个以上时相遥感影像进行土地利用动态变化监测的研究成果,但鲜有基于单时相遥感影像与土地利用现状图进行土地利用动态变化监测的研究成果出现。本文将以土地利用现状GIS数据和高分辨率遥感影像为数据源,探讨利用GIS数据和相应分辨率的单时相遥感影像进行土地利用动态变化监测的有关技术方法和技术流程,并通过实验验证方法和技术流程的有效性和可行性。  相似文献   

4.
本文主要应用灰度形态学中的开运算对高分辨率遥感影像进行处理.应用了VC编程和自编的结构元素,力求去除图像中亮点噪声的影响,加强遥感图像的目视效果,更加的利于图像的辨识.  相似文献   

5.
本文介绍了6种不同的像素级遥感影像融合方法,并较为深入的探讨了几种融合方法的原理、实现过程和优缺点,并对几种融合方法进行了综合评价,得到了针对多光谱影像融合较好的方法,表明了不同传感器影像融合的潜力,同时论文也对融合影像的应用推广进行了初步的对比分析.  相似文献   

6.
介绍GPU的计算方法,分析GPU用于通用计算的发展优势,例举目前基于GPU的密集运算的流行软件,说明今后对于GPU的研究领域与建议。  相似文献   

7.
传感器技术的进步使测绘遥感工程拥有了更多类型的卫星影像可以选择,影像具有各自的几何和光谱特征,融合使用能达到更高的测量精度。文章探究了一条基于IHS变换和NSCT变换的方法融合SAR影像与传统多光谱影像,利用人工鱼群算法进行低频融合,用区域能量特征和投票法进行高频融合,最终在尽量减少损失空间分辨率的情况下获得了更好的光谱信息保持度。  相似文献   

8.
郑巍 《活力》2009,(6):52-52
随着遥感影像分辨率的不断提高。高分辨率遥感影像在土地工作中的利用将日益广泛。本文结合实际工作中利用Quik Bird影像进行大比例尺土地利用变更调查的试验,总结了高分辨率遥感影像进行土地利用变更调查的方法及试验的精度分析,并提出目前利用高分辨率遥感影像存在的困难,为今后的使用者提供借鉴。  相似文献   

9.
无人机低空遥感作为一种新兴的遥感手段,在各行各业中有着广泛的应用。本文简要的介绍了无人机低空遥感的特点,并对其影像数据获取与处理的方法进行了分析。  相似文献   

10.
陈姣  米鸿燕  李超  孔凡涛 《价值工程》2013,32(5):181-183
无人机遥感系统是快速获取数字影像的重要途径之一。本文结合无人机遥感系统在自然地质灾害中的应用,探讨了专门为灾害应急服务的无人机数字影像如何有效利用的问题。文章首先介绍了无人机遥感系统的结构,及在洱源县泥石流灾害应急中的应用,包括影像数据获取和灾情评估。最后,通过分析多次灾害应急航摄影像的共同特点,探讨充分利用影像数据问题,通过加入影像坐标数据,对灾害进行定量分析;提高无人机航摄地面高程精度,使其成为制作4D测绘产品及大比例尺地形图的新数据源。  相似文献   

11.
This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.  相似文献   

12.
Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.  相似文献   

13.
Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.  相似文献   

14.
NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.  相似文献   

15.
There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.  相似文献   

16.
Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.  相似文献   

17.
We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.  相似文献   

18.
A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.  相似文献   

19.
We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.  相似文献   

20.
杨明 《价值工程》2012,31(7):16-17
物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。  相似文献   

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