处理数据洪流掌握溪流健康

时间：2014-11-05 06:59:27

（单词翻译:单击）

Today's natural resource manager tending to the health of a stream in Louisiana needs to look upstream. Way upstream -- like Montana. Michigan State University (MSU) scientists have invented a way to more easily manage the extensive nature of streams. There are 2.6 million stream reaches in the contiguous United States that are intricately interconnected. It's impossible to address the health of one reach without knowing what's happening upstream.
 
Science, wielding1 geographic2 information systems, has obliged with data on geology, climate, pollution and land use. But with that wealth of information comes a crushing amount of data files, making analysis slow and cumbersome3.
 
In the current open-access edition of Springer Plus, Yin-Phan Tsang, a research assistant in MSU's Center for Systems Integration4 and Sustainability (CSIS), and her team present a new database and algorithm that allows other researchers and conservation managers to understand what's coming downstream without being weighted down by data files.
 
"Before, we needed a week to do an analysis on one parameter5 of land use in stream catchments," Tsang said. "Now, we can run 24 parameters6 for every one of the 2.6 million streams in five hours."
 
The algorithm script, included in the paper, can tackle entire countries, but also works with any database to characterize landscape factors in smaller areas. It just needs the regions in question to have its streams broken down into small "discrete7" units assigned a unique identifier and an identifier that shows its upstream connectors.
 
Members of the aquatic8 landscape ecology lab and CSIS, parts of the Department of Fisheries and Wildlife, spend their time working to understand how landscape factors like agriculture and urban land use influence the physical characteristics like rivers and streams.
 
The paper, "An approach for aggregating9 upstream catchment information to support research and management of fluvial systems across large landscapes," was written by Tsang, Daniel Wieferich and associate professor Dana Infante from MSU, Kuolin Fung of 2DiiKaTwenty9 in East Lansing and Arthur Cooper of the Department of Natural Resources, Institute for Fisheries Research in Ann Arbor10.
 
"We had been really struggling with one parameter at a time," Tsang said. "We are tired of it and we knew there was a better way to do this.."

分享到：


点击收听单词发音收听单词发音  

1 wielding 53606bfcdd21f22ffbfd93b313b1f557     
手持着使用（武器、工具等）( wield的现在分词 )； 具有； 运用（权力）； 施加（影响）
参考例句：
  • The rebels were wielding sticks of dynamite. 叛乱分子舞动着棒状炸药。
  • He is wielding a knife. 他在挥舞着一把刀。
2 geographic tgsxb     
adj.地理学的，地理的
参考例句：
  • The city's success owes much to its geographic position. 这座城市的成功很大程度上归功于它的地理位置。 来自《简明英汉词典》
  • Environmental problems pay no heed to these geographic lines. 环境问题并不理会这些地理界限。 来自英汉非文学 - 环境法 - 环境法
3 cumbersome Mnizj     
adj.笨重的，不便携带的
参考例句：
  • Although the machine looks cumbersome,it is actually easy to use.尽管这台机器看上去很笨重，操作起来却很容易。
  • The furniture is too cumbersome to move.家具太笨，搬起来很不方便。
4 integration G5Pxk     
n.一体化，联合，结合
参考例句：
  • We are working to bring about closer political integration in the EU.我们正在努力实现欧盟內部更加紧密的政治一体化。
  • This was the greatest event in the annals of European integration.这是欧洲统一史上最重大的事件。
5 parameter eK4xZ     
n.参数，参量
参考例句：
  • It is the parameter of distribution.这就是分布参数。
  • One parameter which always comes into play is the national economy.国民经济是一个经常起作用的参量。
6 parameters 166e64f6c3677d0c513901242a3e702d     
因素，特征； 界限； （限定性的）因素( parameter的名词复数 )； 参量； 参项； 决定因素
参考例句：
  • We have to work within the parameters of time. 我们的工作受时间所限。
  • See parameters.cpp for a compilable example. This is part of the Spirit distribution. 可编译例子见parameters.cpp.这是Spirit分发包的组成部分。
7 discrete 1Z5zn     
adj.个别的，分离的，不连续的
参考例句：
  • The picture consists of a lot of discrete spots of colour.这幅画由许多不相连的色点组成。
  • Most staple fibers are discrete,individual entities.大多数短纤维是不联系的单独实体。
8 aquatic mvXzk     
adj.水生的，水栖的
参考例句：
  • Aquatic sports include swimming and rowing.水上运动包括游泳和划船。
  • We visited an aquatic city in Italy.我们在意大利访问过一个水上城市。
9 aggregating 0fe55a5efe451057100d17d440c89f32     
总计达…( aggregate的现在分词 )； 聚集，集合； （使）聚集
参考例句：
  • The thesis first promotes based Object Oriented Modeling method-Aggregating & Deriving Mothod. 本文首先提出了基于面向对象思想的建模方法——聚合派生法。
  • Multidimensional data cubes are composed of base cube and other cubes aggregating on base cube. 多维立方体由基本立方体和基本立方体的聚集产生的立方体组成。
10 arbor fyIzz0     
n.凉亭；树木
参考例句：
  • They sat in the arbor and chatted over tea.他们坐在凉亭里，边喝茶边聊天。
  • You may have heard of Arbor Day at school.你可能在学校里听过植树节。

©2005-2010英文阅读网