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排序方式: 共有741条查询结果,搜索用时 15 毫秒
81.
目前第四次全国中药资源普查试点工作采集了大量的成果数据,并且成果数据与地理空间位置之间存在天然的联系。本文以中药资源数据的空间属性作为出发点,在中药资源普查成果数据和已有地理国情监测数据的基础上,建立了基础地理数据库、专题地理数据库和中药资源数据库,设计并实现了能够进行中药资源专题分析计算的地理工具集。最后,基于B/S架构完成了中药资源地理国情监测技术平台的构建,验证了地理工具集设计思路的正确性。 相似文献
82.
吴志娟 《测绘与空间地理信息》2017,40(9)
通过图形化建模工具Model Builder对基本农田数据进行建库,是通过构造地理工作流和脚本将数据和空间处理工具连接起来处理的复杂的GIS任务。本文主要对基本农田数据库的建库采用Arc GIS建模的方法进行了探讨。 相似文献
83.
The Paris Agreement (PA) emphasizes the intrinsic relationship between climate change and sustainable development (SD) and welcomes the 2030 agenda for the global Sustainable Development Goals (SDGs). Yet, there is a lack of assessment approaches to ensure that climate and development goals are achieved in an integrated fashion and trade-offs avoided. Article 6.4 of the PA introduces a new Sustainable Mitigation Mechanism (SMM) with the dual aim to contribute to the mitigation of greenhouse gas emissions and foster SD. The Kyoto Protocol’s Clean Development Mechanism (CDM) has a similar objective and in 2014, the CDM SD tool was launched by the Executive Board of the CDM to highlight the SD benefits of CDM activities. This article analyses the usefulness of the CDM SD tool for stakeholders and compares the SD tool’s SD reporting requirements against other flexible mechanisms and multilateral standards to provide recommendations for improvement. A key conclusion is that the Paris Agreement’s SMM has a stronger political mandate than the CDM to measure that SD impacts are ‘real, measurable and long-term’. Recommendations for an improved CDM SD tool are a relevant starting point to develop rules, modalities, and procedures for SD assessment in Article 6.4 as well as for other cooperative mitigation approaches.
POLICY RELEVANCE
Research findings are relevant for developing the rulebook of modalities and procedures for Article 6.4 of the Paris Agreement, which introduces a new mechanism for mitigation of greenhouse gas emissions and sustainable development. Lessons learnt from the CDM SD tool and recommendations for enhanced SD assessment are discussed in context of Article 6 cooperative approaches, and make a timely contribution to inform negotiations on the rulebook agreed by the Conference of the Parties serving as the Meeting of the Parties to the Paris Agreement. 相似文献
84.
Izabela Golebiowska Tomasz Opach Jan Ketil Rød 《International journal of geographical information science》2017,31(2):237-252
Geographic visualization tools with coordinated and multiple views (CMV) typically provide sets of visualization methods. Such configuration gives users the possibility of investigating data in various visual contexts; however, it can be confusing due to the multiplicity of visual components and interactive functions. We addressed this challenge and conducted an empirical study on how a CMV tool, consisting of a map, a parallel coordinate plot (PCP), and a table, is used to acquire information. We combined a task-based approach with eye-tracking and usability metrics since these methods provide comprehensive insights into users’ behaviour. Our empirical study revealed that the freedom to choose visualization components is appreciated by users. The individuals worked with all the available visualization methods and they often used more than one visualization method when executing tasks. Different views were used in different ways by various individuals, but in a similarly effective way. Even PCP, which is claimed to be problematic, was found to be a handy way of exploring data when accompanied by interactive functions. 相似文献
85.
复杂地层钻进绳索取芯适岩钻头的研究与试验 总被引:1,自引:0,他引:1
研究了南方煤矿区复杂地层钻进中钻头的磨损机理,研制出了适合于复杂地层钻进的绳索取芯钻头。探讨了电镀钻头内、外径的保径方法。试验钻头在复杂煤矿区不同类型的地层中均取得了显著的钻进效果。 相似文献
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89.
重力活塞取样器取样技术研究 总被引:3,自引:0,他引:3
现代海洋沉积物柱状取样技术是一套综合性的高新技术系统,它一般应该包括:优良的取样器具,方便灵活的取样操作设备,高精度的定位导航仪器和高分辨率的地形、地貌、地层探测系统等四个方面。我国和先进国家相比,取样操作设备方面差距最大,应该成为我国今后取样技术研究和发展的重点 相似文献
90.
本文针对中国石油集团测井有限公司(CPL)三维阵列感应测井仪器(Three Dimensional Induction Tool,TDIT)的真实结构与参数,利用2.5维数值模式匹配技术研究建立水平层状非均质TI地层中仪器偏心情况下三维感应测井响应的高效数值模拟算法.首先,利用2.5维数值模式匹配技术给出水平层状非均质TI模型中偏心磁流源并矢Green函数的半解析解.在此基础上,结合三维阵列感应测井仪器参数以及测量过程中出现的仪器偏心与旋转等实际情况,通过叠加原理推导出该仪器响应的有效计算公式.最后,通过数值模拟结果分析考察仪器偏心、仪器自旋角等参数对测井响应的影响以及变化特征,为多分量感应资料处理与解释提供理论基础. 相似文献