On the other side of practical research , regarding cognitive psychology as the theoretical foundation , this thesis researches and analyzes the characteristic of network learning environment , and the problems about self - adaptive learning implementation in the existing system , further puts forward the construction tactics of the web - based self - adaptive learning system 在实践研究和开发方面，以认知心理学为研究的理论基础，系统地研究分析了网络学习环境的特点，以及当前网络学习系统在自适应学习实施方面存在的主要问题，进而提出了基于网络的自适应学习系统的全面构建策略。
For the user profile learning , this paper adopts an adaptive learning algorithm based on hierarchy clustering to update user profile . through the hierarchy clustering , we obtain several document classes , each class containing an indefinite number of documents . the most relevant class will be used to update the user profile 在用户模板学习方面,本文提出了一种基于层次聚类的自适应学习机制,通过对伪相关反馈信息进行聚类,选择最相关的一类信息用于更新用户模板,从而解决用户需求初始信息稀疏和阈值估计偏见性问题。
Based on the introduction of the adaptive learning system function , aiming at " information technology for tv university " , the paper considers theory , technology and method fulty , and explains in detail the construction of the knowledge database , student model , teacher model , the key technology and the implementation method of the adaptive learning system bused on web 摘要本文在描述了适应性学习系统功能的基础上，针对课程，以理论、技术与方法并重，详细论述了基于web的适应性“电大信息技术”学习系统采用的知识库模型、学生、教师模型、关键技术及系统的实现方法。
This paper focuses on the theories and controller designs of forward neural netwoks ? bp network . at first , the structure and algorithms of bp network are deeply researched , the ralations between momentum factor and convergence speed 、 convergence accuracy are revealed and a kind of improved bp algorithm is presented . then the identification method based on bp network with adaptive learning rate is studied and the simulaton indicates it can adaptively track the plant 本课题主要针对前向神经网络? ? bp网络理论与控制器设计进行研究。首先重点对bp网络的结构和学习算法进行了深入研究，揭示了动量因子与网络收敛速度、收敛精度之间的关系，并提出了一种改进的算法。然后研究了采用自适应学习率bp网络的辨识方法，仿真说明其可以自适应地跟踪辨识被控对象。
Based on the introduction of the adaptive learning system function , aiming at " information technology for middle school " , the paper considers theory , technology and method fulty , and explains in detail the construction of the knowledge database , student model , the key technology and the implementation method of the adaptive learning system bused - on web 摘要本文在描述了适应性学习系统功能的基础上，针对《中学信息技术》课程，以理论、技术与方法并重，详细论述了基于web的适应性学习系统采用的知识库模型、学生模型、关键技术及系统的实现方法。
After analyzing the limitation of the web - based learning assistant system in china and integrating the present level of internet , this research puts forward and then creates a web - based intelligent learning assisted system - ilas with the direction of the theories such as constructivism , adaptive learning and software engineering which is for teachers and students and realize the combination of individual , adaptive and interactive group learning 本课题研究在详细分析了当前国内网络学习帮助系统存在的主要缺陷后，结合internet的实际发展水平，在建构主义学习理论、适应性学习理论和软件工程学理论的指导下，提出并实现了一个基于web ，面向师生，以实现个别化学习，适应性学习与交互式群体协同学习相结合的，并具有初步智能的学习帮助系统? ? ilas 。
Based on the analysis of conventional intelligent tutoring system , analyze the reason for the shift of adaptive learning system , and then deduce that adaptive learning system should be made up of role of instruction , learning tools " module , module of adaptive presentation and navigation , module of collaborative learning , module of domain and instruction expert , user modal and adaptive component 第三部分基于web的适应性学习系统的规划与设计：详细论述了适应性学习系统的规划与设计。在分析传统智能教学系统模型的基础上，探讨了导致适应性学习系统模型发生迁移的因素，最后提出基于web的适应性学习系统的设计模型。
V the development of adaptive learning system based web : we describe the five technological procedures of designing and developing adaptive learning system , which include the analysis and construction of system , the designing and development of database , programming , testing and maintaining 第五部分基于web的适应性学系统的开发：论述了适应性学习系统具体的技术实现过程。技术实现主要包括系统分析与架构、数据库设计与开发、程序编写、测试和维护等五个过程。
It shows the learner - centered educational ideas advocated by the constructivism as well as the individual and adaptive learning ideas of adaptive learning theory and set a primarily learning assistant model for web - based instructional system . there are six parts in the thesis and the first part explains the background of the research , some relevant researches at home and abroad as well as the content , aims and meaning of it 这一系统初步体现了建构主义学习理论所提倡的“以学习者为中心的”的教育思想和适应性学习理论所提倡的“个别化、适应性学习”的教育思想，并为基于web的教学系统提供了一个初步的学习帮助模式。
Problem - knowledge environment , where based on solving ill - structured problems , students may construct mathematics . by " doing mathematics " or exploring " mathematics experiment " , they may invent or discover some new mathematics knowledge by themselves . this is a challenge to traditional learning , which belongs to innovative learning . in microcosmic aspects , based on broad sense of knowledge idea , we make id for primary adaptive learning environment , while based on cognitive flexibility theory , we make id for senior adaptive learning environment 高级学习环境是一个再发现、再创造、建构数学知识的环境，其主要作用是促进学生基于数学问题解决，通过“做数学” 、探究“数学实验”而进行再发现、再创造和建构新的数学知识和数学模式，这是一个数学创新学习的环境。
