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1.
ArcGISServer是企业级的GIS应用平台,本文基于ArcGISServer提供的Web应用程序框架开发框架和AJAX技术,提出了一种通用的方法,实现了Web端高效的进行专题图渲染。  相似文献   

2.
《城轨交通车站行车工作》是高职城市轨道交通运营管理专业的一门专业核心课,根据专业人才培养方案,行车岗位技能要求愈加高,ATS实训设备的使用为完成人才培养目标提供了有力的支持。因此,将基于ATS的使用对《城轨交通车站行车工作》课程标准进行开发。  相似文献   

3.
深圳地铁罗宝线及广州地铁一、二号线采用的是德国西门子ATC信号系统。ATC信号系统中顶层子系统ATS起着"画龙点睛"的作用。在日常地铁行车指挥过程中,信号系统中的ATS子系统帮助行车指挥人员做了大量的工作,它负责调整指挥列车运行,它负责组织列车按图行车等。当ATS发生故障时,行车指挥人员应该如何将ATS故障影响降至最低呢?通过对深圳地铁罗宝线ATS子系统工作原理、功能及故障的分析,找出了应对ATS故障的对策,对行车指挥工作人员有一定的指导和借鉴意义。  相似文献   

4.
机电一体化产品和技术可分为机械、电子和软件三大部分。这三者的特征明显不同,如表所示。但模块化技术是它们的一项共同的技术。模块化技术可以减少产品的开发和生产成本,提高不同产品间的零部件通用化程度,提高产品的可装配性、可维修性和可扩展性等。人们已对机械、电子和软件的各自的模块化进行了大量的研究,但缺乏对机电一体化系统的整体的模块化的研究。本文试图在这方面作一开拓性的分析与研究。  相似文献   

5.
改革开放以来,在各级政府的大力支持下,淇县淇河鲫鱼苗种繁育有限公司以雄厚的技术实力从事了三珍产品的研究与开发,淇河鲫鱼人工繁育、人工养殖技术取得了省级科技成果,中央电视台科技苑栏目曾三次作了专题报导,中国农业出版社出版的《优质鲫鱼养殖技术》丛书、河南科技出版社出版的《名特优水产品养殖技术》丛书都编录了淇河鲫鱼的系统技术资料,使历史名鱼的声誉又得到了更进一步的提高。缠丝鸭蛋的规模化生产技术申报国家技术专利后,国家知识产权局已予公告发布,其技术水平达国际领先地位,这项技术的研究成功使缠丝鸭蛋由原来的只“珍”无量的局面,进入了规模化生产的产业之路,无核枣产品也正处于向产业化开发的研究进展中。  相似文献   

6.
本文叙述了1974年11月3日所进行的一次跟踪试验,在这次试验中,地面站通过中继卫星对空间飞行器成功地进行了24小时的跟踪和测轨。在试验中,使用了一种新的方法准确地计算了应用技术卫星(ATS—6)的轨道数据。通常卫星跟踪包括一个由很多地面站组成的跟踪网和数据收集设备。然而这种新方法是用一个地面跟踪站通过轨道已经确定的同步卫星同时与几个安装在不同地点的地面应答机协同工作。ATS—6跟踪测量数据的随机误差在整个24小时之内,测速为0.3mm/秒,测距为1.5米。分别使用两组数据,通过对卫星轨道的重复计算,可以使ATS—6的速度误差最小达到0.2cm/秒,距离误差最小可达30米。在同样时间之内,最大的距离误差约为250米,速度误差为2cm/秒。利用两颗卫星ATS—6和ATS—3同时跟踪哥达德飞行中心地面站来确定地面站的位置也是可行的。在跟踪的前10小时之内,站址精度可以校正到大约100米的数量级之内。  相似文献   

7.
基于多年从事数控编程后置处理软件技术研究基础和通用后置软件应用开发经验,结合数控后置处理技术应用需求和具体的后置软件和逆向转换软件的开发实践,阐述了基于常规CAM软件的数控编程代码处理技术和后置处理软件开发技巧.  相似文献   

8.
中频软件无线电系统的FPGA实现方案   总被引:1,自引:0,他引:1  
软件无线电作为无线通信技术的又一次革命,是目前通信领域中最为重要的研究方向之一。本文研究职频软件无线电的实现方案,并用FPGA设计和实现了基于此方案的中频软件无线电的通用硬件平台。  相似文献   

9.
软件重用是目前提高软件质量和开发效率、降低软件开发成本的一种重要手段。本文首先概要介绍了软件重用的发展历程,并着重分析了当前软件重用的特点和存在的问题,引入了Agent技术对软件重用的支持,进一步提出基于Agent技术构造通用可重用软件系统模型。  相似文献   

10.
系列化、通用化、标准化、模块化技术是机械制造常用的有效先进方法。为了把这些优化设计方法与CAD技术结合起来,中国机床工具协会计算机应用技术专家委员会开发了通用、标准零件图库建立与应用工具软件,该软件可以与任何CAD支撑软件接口,快速完成通用与标准图库的建立与使用。该软件由零件特证识别与分析模块、零件库查询、图形调用模  相似文献   

11.
The study examines the influence of national culture on national averages of time spent (ATS) visiting the largest social networking sites (SNSs): Facebook, Twitter, and LinkedIn. The analysis uses cultural dimensions adopted from both the works of Hofstede and Schwartz, while controlling for country e-readiness and median population age. The findings suggest that culture's influence may be moderated by the media richness and type of network focus of each SNS. Overall, in rich-media SNSs, egalitarianism positively impacts ATS. Individualism and masculinity only impact ATS on friendship-oriented SNSs. Additionally, uncertainty avoidance and intellectual autonomy only impact ATS on professional-oriented SNSs.  相似文献   

12.
With the increase in use of a technology, its misuse possibility also increases in general. Moreover, there are instances where new technologies are implemented without thoroughly testing for vulnerabilities. We consider RFID, a disruptive technology, and related vulnerabilities in existing supply chain applications from an ethics perspective. We develop an extended ethics model to incorporate the effects of emerging information and communication technologies, specifically that of RFID systems, including technology selection, social consequences, and practitioners’ rationality. We introduce a set of matrices for technology regulation development based on this model to serve as a communication tool for the policy maker for policy design regulation. We use the case of RFID to illustrate the model and matrices.  相似文献   

13.
Home networks (HNs) are rapidly becoming the next battlefield for various telecom carriers and companies. The European project ICT-OMEGA seeks to enable the convergence of the diverse wireless and wireline technologies at the Medium Access Control (MAC) layer. In such a world of converging, heterogeneous HN technologies, system designers needs to take into account several technical, economic and social aspects that will effect the development and the rate of adoption of HNs by the general public. Careful roadmapping is required to ensure a smooth transition from existing to the next generation HN systems. The objective of this paper is to provide an evaluation of the key technological and socio-economic issues, which may affect the deployment of HNs. Within the OMEGA project, such issues are addressed using surveys conducted by the project experts, designed based on the Analytic Hierarchy Process (AHP). In this paper, the results of the surveys, conducted using pairwise comparison (which is an important ingredient of AHP) are presented. Several critical aspects are identified and their importance is weighted. The conclusions drawn are important for the overall roadmapping effort of future HN technologies.  相似文献   

14.
This information paper outlines how the interests of minors are dealt with in the European Union's (EU) embryonic policies for new audiovisual and information services, in the context of what has happened – and is currently happening – in broadcasting and telecommunications. It is written from the public interest and consumer perspective rather than that of the industries involved, with a particular concern that the major contribution that new, technology-based services can make to the mental and moral development of children should not be prejudiced by harmful and damaging content. The author also addresses the virtually complete neglect of the need to protect children from economic exploitation through the new technologies.In general, the momentum of EU policy to ensure free movement of services, combined with the practical problems of developing an effective international regulatory structure for the new trans-border technologies, suggests that there will be considerable technological and commercial pressures to relax existing provisions which aim to protect minors, while there will be major obstacles in the way of developing new legislative or regulatory measures. This is a pessimistic scenario for those concerned with the interests of children. Nevertheless, there are some opportunities, which are outlined in the final section of the paper.  相似文献   

15.
The rapid growth in consumer-generated Big Data that are mostly sourced from various types of mobile devices and sensor technologies has placed increasing competitive pressure on retailers to leverage such data within their location decision-making practices. This paper examines the incorporation of Big Data within retail organizations. Through the analysis of three in-depth case-studies of major retail-related organizations operating in Canada, this research addresses the following two inter-related objectives: (i) to identify the awareness, availability, and development of Big Data environments; and, (ii) to explore the opportunities and challenges associated with new Big Data-based decision support systems within retail organizations. The characteristics of an ideal data environment for Big Data adoption and development to take place are identified. The key findings reveal that while there was general awareness of the importance of Big Data, it was evident that the adoption and development of Big Data decision support was heavily reliant on a data environment that promotes transparency and a clear corporate data strategy.  相似文献   

16.

Technology application in retailing has a considerable history, with applications for the most part aimed at labour cost reduction. The technologies now being applied in retailing and distribution however differ from these earlier ones in a fundamental way. The new technologies in micro‐electronic based computing and micro‐electronic communications differ by being general purpose and flexible and by developing very rapidly. The new technology is enabling changes to take place in the distribution channel. The areas of applications of the new technology and the applications and reasons of technology introduction are analysed in this paper.  相似文献   

17.
A simple model of firm heterogeneity, international trade, and wages   总被引:3,自引:0,他引:3  
This paper presents a general equilibrium trade model in which homogeneous firms choose a technology from a set of competing technologies and choose employees from a set of workers of heterogeneous skill. In equilibrium, the interaction between the characteristics of competing technologies, international trade costs, and the availability of workers of heterogeneous skill gives rise to firm heterogeneity. The model generates several of the stylized facts concerning the (apparent) superiority of firms that engage in international trade relative to those that do not and has implications for the effect of international trade on the skill premium and on observed industry-level productivity.  相似文献   

18.
Participatory democracy is one of several conceptions of democracy which strives to create opportunities for all members of a group to contribute to the decision making process. Recent developments in information technologies in general and Internet technologies in particular are affecting the existing democratic mechanisms, hence enabling citizens and organizations to participate widely, efficiently and transparently in the decision making process and, most importantly, to arrive at better decisions faster, through negotiation. E-negotiation systems rely on such technologies to implement protocols ranging from motion raising and voting to auctions, and to make them available on the web for general use. E-negotiation systems can be used for political and societal decision making as well as business dealings within e-government and B2B settings. In order for these systems to fulfill their promise of bringing decision making opportunities to all, we need a structured approach and a configurable framework for designing, implementing and deploying them. The resulting systems should be web-based, easy to use, affordable, traceable, reliable, secure, flexible, efficient, and open for integration with other systems. This paper starts by examining leading research initiatives to devise such a framework and discussing the motivations behind them. We then introduce several design requirements derived from the expectations of e-negotiation systems providers and users. We argue that meeting these requirements fosters a more democratic and efficient decision making process. We also present our approach and vision of a configurable framework for designing, implementing and deploying e-negotiation systems.  相似文献   

19.
This paper discusses revenue management; a technique that focuses on decision making that will maximize profit from the sale of perishable inventory units. New technologies management plays an important role in the development of revenue management techniques. Each new advancement in technology management leads to more sophisticated revenue business capabilities. Today decision support revenue management systems and technologies management are crucial factors for the success of businesses in service industries. This paper addresses the specific case of customer groups in hotels. This paper introduces a new decision support system that sets the revenue maximization criteria for a hotel. The aforementioned system includes a set of demand forecasting methods for customers and addresses a general case considering individual guests and customer groups. The system also incorporates deterministic and stochastic mathematical programming models that help to make the best decisions. The actual revenue depends upon which reservation system the hotel uses. A simulation engine makes a comparison between different heuristics of room inventory control: the results include performance indexes such as occupancy rate, efficiency rate, and yield; it compares results and chooses one of them. The system proves its suitability for actual cases by testing against actual data and thus becoming an innovative and efficient tool in the management of hotels' reservation systems.  相似文献   

20.
In recent years, Korea has emerged as one of the world's fastest growing industrial nations. Manufacturing industry has been the foundation of its economic success, and, in this paper, an in-depth analysis of the development process of the Korean manufacturing industry is presented. From an early stage, Korean manufacturers followed a general pattern in achieving their current success: they successfully combined high-quality, but inexpensive and plentiful, human resources with imported technologies and material to produce low-cost goods for a protected market. In this process, the Korean government played the role of planner, protector, and provider for the national economy and the entire manufacturing industry. In recent years, however, the private sector has assumed leadership in terms of planning and executing industrial development plans. With this change, Korean manufacturers are making a clear transition from a low-cost producer to a high value-added competitor with an increasing emphasis on quality and flexibility. This paper offers an empirical analysis of the performance improvements, future competitive priorities, and action programmes designed to achieve this strategic shift.  相似文献   

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