SSS 2012-07-02
时间：2019-01-08 作者：英语课 分类：Scientific American(七)月
英语课
The same mathematical models used to study the hunting range of lions have many other applications—they describe the flight patterns of honeybees. And now researchers say these math models can help explain the stability of gang territories and patterns of between-gang violence. The work is in the journal Criminology.
Researchers used the models to draw new maps of gang territories in East L.A. What are known as the competitive Lotka-Volterra equations describe population dynamics 1 between species competing for resources. They take into account the effect each population has on the other.
The researchers generated maps of gang territories using the Lotka-Volterra equations rather than police reports or urban geographical 2 features. After creating maps, researchers analyzed 3 data about between-gang shootings and found that violence clusters along the gang boundaries predicted by their model.
The researchers think that their work also demonstrates that a gang’s turf forms in part based on competitive interactions with other gangs. The hope is that understanding patterns of between-gang violence can help police prevent more of it.
Thanks for the minute for Scientific American 60 second science, I am Evelyn Lamb.
n.力学，动力学，动力，原动力；动态
- In order to succeed,you must master complicated knowledge of dynamics.要取得胜利，你必须掌握很复杂的动力学知识。
- Dynamics is a discipline that cannot be mastered without extensive practice.动力学是一门不做大量习题就不能掌握的学科。
adj.地理的；地区(性)的
- The current survey will have a wider geographical spread.当前的调查将在更广泛的地域范围內进行。
- These birds have a wide geographical distribution.这些鸟的地理分布很广。
v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析
- The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
- The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程，因为对他来说，爱是个不可分析的迷。 来自《简明英汉词典》