智慧地球时代测绘地理信息学的新使命   总被引：1，自引：0，他引：1  

李德仁  姚远  邵振峰 《测绘科学》2012,37(6):5-8

本文首先指出智慧地球是数字地球、物联网和云计算等有机的融合,随后分析了智慧地球的主要特性,并重点阐述了智慧地球时代测绘地理信息学的新使命。作者认为我们已经从绘制地形图为主的小测绘发展成为当今以地理空间信息服务为主的大测绘,现在必须抓住机遇,不失时机地拓展智慧地球时代测绘地理信息学的新使命,将传统测绘提升为能够实时、智能地采集和处理海量空间数据、提供空间信息和知识服务的智慧测绘新阶段。  相似文献   

Trump's America or the People's America? A View from the Periphery     

William G. Moseley 《The Professional geographer》2019,71(1):152-156

My overarching argument in this article is that the United States is no different than any other country in the world in that its population has elected good leaders and bad. As in other places, global and national neoliberal economic reforms have affected the U.S. economy, hallowing out the manufacturing sector, shrinking government and social safety nets, and fostering income inequality. This has left various U.S. publics struggling to make ends meet and vulnerable to demagoguery. Although the country prides itself on the strength of its institutions, institutions are no more than social contracts that need to be assiduously maintained by civil society. Although there is a strong “ivory tower” tradition in U.S. academe, the republic needs scholars—acting as public intellectuals—to fully participate in civic debates if it is to have a sufficiently robust civil society that maintains and defends its democracy and institutions. This article is divided into three sections. First, I briefly review the Trump administration's proposals for international development and diplomacy, giving particular attention to these issues in the African context. Second, I present an argument for why the United States needs public intellectuals now more than ever. Third, I share some concrete advice on how geographers might better connect with various publics.  相似文献   

商事委托合同任意解除权的思考     

余珺 《成都信息工程学院学报》2008,23(3):340-344

中国现行合同法没有区别民事委托合同与商事委托合同,而统一赋予两者任意解除权,导致实践中商事委托合同因任意解除权的行使而产生了大量的纠纷。对赋予商事委托合同提出质疑,并从委托合同任意解除权之法理,委托合同之发展演变,商事委托合同之博弈性,商事委托合同之经济性以及商事委托合同任意解除权行使与权利滥用等诸多角度论述了赋予商事委托合同任意解除权的不合理性。  相似文献   

栉孔扇贝(chlamys farreri)外套膜组织原代培养的初步研究   总被引：1，自引：0，他引：1  

郎刚华  王勇  刘万顺  徐怀恕 《中国海洋大学学报(自然科学版)》2000,30(1):123-126

以栉孔扇贝(chlamys farreri)外套膜为材料,采用几种除菌方法进行除菌处理后,应用自己设计的培养基对其进行了原代培养。实验结果表明,以青霉素、链霉素和复方洗必泰混合溶液除菌,对组织损伤小,除菌彻底。在此培养条件下,栉孔扇贝外套膜细胞能正常迁出和生长。  相似文献   

基于合约化的水权交易市场分析   总被引：3，自引：0，他引：3  

张郁  吕东辉  秦丽杰 《地理科学》2003,23(1):118-121

当前,我国水资源短缺的形势十分严峻,加强水资源的经济管理是社会主义市场经济的客观要求。水权交易可以利用市场与价格信号来优化配置水资源,同时也有助于国家对经济的宏观调控。提出建立一种合约化的水权交易市场模式,并对市场的结构和功能加以分析。  相似文献   

建设数字孪生城市的逻辑与创新思考     

张新长  李少英  周启鸣  孙颖 《测绘科学》2021,46(3):147-152,168

介绍了数字孪生城市的提出背景以及基本概念,分析了数字孪生城市与智慧城市之间的关系,并介绍了构建数字孪生城市的主要支撑技术,最后总结了数字孪生城市的应用现状及发展趋势。作者认为,数字孪生技术要在智慧城市建设中得以更广泛的应用还将面临数据、基础知识库、系统融合以及人才问题等方面的挑战,并从宏观与微观层面提出解决这些问题的制度路径和技术路径。  相似文献   

利用WCF进行空间矢量数据服务模型设计     

刘灿由  郭黎  张斌  张威 《测绘学院学报》2011,(3)

地理信息网络服务越来越普遍,但矢量数据服务在实际应用中却存在很多问题。针对现有的矢量数据服务接口标准(如WFS)过于简单无法满足复杂的实际应用的现状,设计了一个基于WCF数据契约的空间矢量数据服务模型。针对传统Web Service技术对大数据流处理效率低的问题,提出利用WCF信道压缩编码器提高大数据量传输的方法;同时利用WCF内置的安全模式实现了矢量数据的传输安全。  相似文献   

Smart Client与Office System整合应用研究     

方睿  郝玉洁 《成都信息工程学院学报》2006,21(4):479-483

Smart Client既可以运用网络和Web Services存取各种外部系统的资源，又能使用本地计算机的所有资源，充分发挥客户端的运算能力，是一种全新软件模式。Office 2003 System中提供了一个Smart Document的功能。使用以文档为基础的方式扩充智能感知的XML标记功能，和用户交互更容易。微软还提出了一套Information Bridge Framework（IBF），来协助开发人员建立方案来连接Microsoft Office应用程序与Web服务。应用Microsoft的Smart Client，结合Office 2003 System以及．NET技术，构建一种部署成本低、维护容易、构架轻小、健壮的应用系统。  相似文献   

EPC模式下业主对项目合同模式的选择研究     

王海志 《中国勘察设计》2014,(11):82-86

工程总承包EPC模式下,合同模式的选择事关项目成败、承包商持续努力工作的激励和项目执行成本的大小。本文通过剖析以支付方式分类的现有合同模式特征,就业主要求稳定性、项目建设规模、自然因素的不确定性、承包商努力程度等对工程项目成本的影响因素进行了分析,并结合实例,就业主在合同模式选择中需要关注的策略及合同绩效指标的激励方案作了探讨。  相似文献   

Global sustainability,innovation and governance dynamics of national smart electricity meter transitions     

《Global Environmental Change》2021

Smart electricity meters are a central feature of any future smart grid, and therefore represent a rapid and significant household energy transition, growing by our calculations from less than 23.5 million smart meters in 2010 to an estimated 729.1 million in 2019, a decadal growth rate of 3013%. What are the varying economic, governance, and energy and climate sustainability aspects associated with the diffusion of smart meters for electricity? What lessons can be learned from the ongoing rollouts of smart meters around the world? Based on an original dataset twice as comprehensive as the current state of the art, this study examines smart meter deployment across 41 national programs and 61 subnational programs that collectively target 1.49 billion installations involving 47 countries. In addition to rates of adoption and the relative influence of factors such as technology costs, we examine adoption requirements, modes of information provision, patterns of incumbency and management, behavioral changes and energy savings, emissions reductions, policies, and links to other low-carbon transitions such as energy efficiency or renewable energy. We identify numerous weak spots in the literature, notably the lack of harmonized datasets as well as inconsistent scope and quality within national cost-benefit analyses of smart meter programs. Most smart meters have a lifetime of only 20 years, leading to future challenges concerning repair, care, and waste. National-scale programs (notably China) account for a far larger number of installations than subnational ones, and national scale programs also install smart meters more affordably, i.e. with lower general costs. Finally, the transformative effect of smart meters may be oversold, and we find that smart electricity meters are a technology that is complementary, rather than disruptive or transformative, one that largely does not challenge the dominant practices and roles of electricity suppliers, firms, or network operators.  相似文献