SAT閱讀素材:a learning sysstem.

　　SAT閱讀題重點考察考生的美國大學(xué)教材的快速閱讀能力、理解能力及判斷能力。SAT閱讀除了檢測考生的詞匯量外，還要考察考生的理解及判斷的綜合能力。下面來看一篇閱讀材料：a learning sysstem。

　　Learning, Rule, Environment and overall planning of a learning sysstem

　　The task of learning from environment (what forms environment - www.innerlightcrystal.com one for nell) should be specified. It requires the learner (in this case, could be nell) to infer the laws of the environment in terms of its percepts (explain the percepts in details here) and actions, and use the laws to solve problems (what kind of problems?).

　　Based on research on problem space creation and discrimination learning, first design an approach in which exploration, rule creation and rule learning are coordinated in a single

　　framework. With this approach, the system Nell creates certain rules by noticing the

　　changes in the environment (web in our case) when actions (updating the web, linking in more info) are taken, and later rines the rules by explaining the failures of their predictions. Unlike

　　many other learning systems, nell treats learning and problem solving as interleaved activities, no training instance nor any concept hierarchy is necessary to start learning. Furthermore,

　　the approach is capable of discovering hidden features from the environment when normal discrimination process fails to make any progress.

　　以上就是為大家推薦的一篇SAT閱讀材料。每一篇文章均有其主要觀點或中心主題。典型的圍繞文章主要觀點的問題大多是：在這篇文章中作者的主要目的是什么?這篇文章主要涉及什么問題?這篇文章主要建議是什么?這篇文章總體上想要回答什么問題等。讀完每一篇素材，我們都要針對文章想想這幾個問題。