Factsage软件的使用
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Fragstats 4.2简易教程一、使用说明1.数据格式Fragstats能够支持多种数据格式,但4.2以及后续版本将使用Geo TIFF grid作为主要的数据格式(图1)。
图12.数据命名以及存放路径导入数据的名称和路径不能包含汉字和空格,且存放于二级目录,例如:D:\123\1987.tif3.背景问题背景值默认设置为999,但你完全可以在理解其意义的前提下依照自己喜好进行调整。
简单来说,背景即你分析过程中想要自动忽略的某种地表类型——由于资料缺乏而无法归类、或者你单纯想将其作为背景值处理的地表类型。
值得注意的是,当设定为正值时,背景像元值被视作目标景观内部值;当设定为负值时,背景像元被视作目标景观外部值。
内部背景作为目标景观的一部分不仅会为整个景观面积作出贡献,并且会因此而改变许多指数值;外部背景不会被视作目标景观的一部分,只会对影像边缘的连接性产生影响。
在景观计算中,需要注意背景的影响。
这是景观指数误差中很大的一部分。
比如说,我们拿到的遥感图像,校正好后,边界裁剪后,一般不是规则的矩形。
在边边角角存在没有信息的像元。
图像分类后,没有信息的像元也是作为分类的一种的。
因此,需要对其进行去除。
这个操作可以在Arcgis 下操作。
4.下载地址/landeco/research/fragstats/downloads/fragstats_d ownloads.html二、操作步骤2.1打开Fragstats首先,从开始菜单或双击桌面图标打开Fragstats 。
如果你的电脑上已安装10.0及以下版本的ArcGIS ,那么Fragstats 打开时将有明显延迟(有时长达30s ),这是由于Fragstats 在验证ArcGIS 的使用许可(license )。
请务必保持耐心(图2)。
图22.2新建模型接下来你需要创建一个Fragstats 模型用于对斑块的景观结构进行分析。
一个Fragstats 模型简单来说就是为Fragstats 进行了全副参数化,即为其配备了分析所需的全部参数。
factset使用指南英文回答:FactSet is a comprehensive financial data and analytics platform that provides investment professionals with the tools and information they need to make informed decisions. It offers a wide range of features and functionalities, including real-time market data, historical data, financial statements, news and research, portfolio analysis, and more. With FactSet, users can access and analyze data fromvarious sources, such as exchanges, regulatory filings, and news agencies, to gain insights into the financial markets and individual securities.One of the key features of FactSet is its powerful data visualization capabilities. Users can create charts, graphs, and interactive dashboards to present and analyze data in a visually appealing and intuitive way. This allows foreasier interpretation and understanding of complexfinancial information. For example, I can create a linechart to compare the historical performance of different stocks or a bar chart to visualize the sector breakdown of a portfolio.FactSet also offers a wide range of analytical tools and models that help users evaluate investment opportunities and assess risk. These tools include financial ratios, valuation models, risk models, and performance attribution analysis. For instance, I can use the discounted cash flow (DCF) model to estimate the intrinsic value of a company's stock or the Value at Risk (VaR) model to measure the potential loss of a portfolio under different market scenarios.In addition to its data and analytics capabilities, FactSet provides collaboration and workflow management tools that enable users to work more efficiently and effectively. Users can share data, analysis, and reports with colleagues and clients, collaborate on projects, and track changes and updates. This fosters better communication and collaboration within teams and ensures that everyone is working with the most up-to-dateinformation. For example, I can share a research reportwith my team and receive their feedback and commentsdirectly within the platform.中文回答:FactSet是一个综合金融数据和分析平台,为投资专业人士提供了他们需要做出明智决策的工具和信息。
矿 冶MINING AND METALLURGY第31卷第1期2022 年2 月Vol31 , No1February 2022doi : 10. 3969/j. issii . 1005-7854. 2022. 01. 015高温真空焙烧法去除铝电解废旧阴极中的浸出毒物辛鑫赵俊学王泽谭泽馨胡爱琳唐雯聃王贺张桢凯(西安建筑科技大学冶金工程学院,西安710055)摘 要:铝电解生产过程中产生的废旧阴极(SPL )含有浸出毒物氟化物(以F -计)和氰化物(以CN -计),对环境造成巨大威胁。
采用高温真空焙烧法去除废旧阴极中的氟化物和氰化物。
在FactSage 热力学计算的基础上,研究了温度、真空度和坩埚材 质对浸出毒物去除效果的影响。
结果表明,在真空度10 Pa .温度1100 C 下,使用石墨坩埚焙烧废旧阴极,浸出毒物的去除效果最佳。
结合TG-DSC 分析,发现高温真空环境中,氟化物发生分解并挥发,氰化物也能分解成无毒物质,处理后的废旧阴极 可由危废转变为一般固废,实现电解质和碳质材料的有效分离,便于综合利用。
关键词:铝电解;废旧阴极;高温真空处理;无害化中图分类号: TF821 文献标志码: A 文章编号: 1005-7854(2022)01-0091-07High-temperature vacuum treatment of toxic substances leached fromspent pot lining of aluminum electrolysisXIN Xin ZHAO Jun-xue WANG Ze TAN Ze-xin HU Ai-iin TANG Wen-danWANG He ZHANG Zhen-kai(School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055 , China)Abstract : The spent pot lining (SPL )produced in the aluminum electrolysis production process containsleaching poisons fluoride( calculated by F — )and cyanide( calculated by CN — ) , which pose a huge threat to theenvironment FluorideandcyanideinSPL were removed by high temperature vacuum roasting Basedon FactSage ' s thermodynamic calculations , the effects of temperature , vacuum and crucible material onleaching poisons when the vacuum degree is of 10 Pa and the temperature is of 1 100 C , the SPL is roasted in a graphite crucible , and the leaching poison is most effective good. Combined with TG-DSCanalysis , in a h igh-temperature vacuum environment , fluoride decomposes and volatilizes , and cyanide can also decompose into non-toxic substances , so that the treated SPL is converted from hazardous wastetogeneralsold waste ,real zng the e f ectve separaton of electrolyte and carbonaceous materaland facltatngtocomprehensveutlzaton.Keywords : alumnumelectrolyss ; spentpotlnng ; hgh-temperaturevacuumtreatment ; harmless电解铝生产过程中排放的大修渣中含有毒性较高的可溶氟化物和氰化物[13],属于典型危险废物。
Fragstats软件的使用方法
1、打开软件:双击Fragstats.exe
2、设置参数:fragstats--set run parameters ,然后在弹出的窗口中按如下设置
最后,点击OK。
3、选择要计算的景观级别指标:点击菜单栏fragstats--select land metrics,然后在弹出的窗口中选择需要计算的各指标,然后点击确定。
4、选择要计算斑块类型级别指标:点击菜单栏fragstats--select class metrics,然后在弹出的窗口中选择需要计算的各指标,然后点击确定。
5、运行:点击菜单栏fragstats—excute,,点击确定。
6、查看及保存结果:点击菜单栏tools—brows result,弹出窗口
点击,在弹出窗口中选择路径,点击保存,最后就可以在自己找到相关的文件,用excel打开,查看结果。