Landscape patterns and agriculture: modelling the long-term effects of human practices on Pinus sylvestris spatial dynamics (Causse Mejean, France)

This paper focuses on understanding human impact on landscape. Both ecological and human practices are analysed as interacting processes. An agent-based model integrating biological and historical knowledge is used to analyse the pattern of Scots Pine encroachment in a French Mediterranean upland. In the STIPA model, pine trees are autonomous agents and a cellular automaton simulates land-use. We test the effects of shifting cultivation on tree establishment at the landscape scale. This allows us to understand how agropastoral practices patterned this area from the 17th to 19th century: simulations show the importance of shifting cultivation in limiting woodland progression. Fallow duration linked to environmental heterogeneity is a significant factor for explaining pine dynamics and landscape patterning at the scale of the study region. We put this result in perspective with current rangeland management policies that often consider grazing as the most relevant tool for open landscape maintenance. Our results also show the importance of taking into account time-scale effects when linking landscape patterns to agricultural systems.     

建设项目风险管理的多Agent系统框架

从分析建设项目风险特点和管理过程出发,结合多Agent技术特点及其在应用于建设项目风险管理的可行性研究的基础上,给出了基于多Agent技术的建设项目风险管理系统(MACPRMS)的整体构架。并且,对于与建设项目其他系统的信息交互问题,给出了CORBA解决方案。     

基于多智能体的分布式推理模型设计与实现

本文探讨了利用多智能体系统(Multi-Agent System,简称MAs)的开放性和协调性建立推理机制模型的思想,研究了协商基础上的推理机制问题.根据协商的思想,设计了分布式推理的算法以及推理机模型,并介绍了网络环境下MAS分布式推理机组件的实现方法.     

An intrinsic mechanism for the co-existence of different survival strategies within mobile pastoralist communities

In mobile pastoralism, strategies of mobility are highly heterogeneous within communities; some herders are frequently mobile and others are not. Moreover, pastoral mobility changes over time, especially after external intervention. Although changes in the strategies of herders affect and are affected by other herders, the interactions between herders with different strategies and the effect of changes in the external environment on their strategies have not been explicitly studied. We examined such interactions with a multi-agent model, simulating the herders’ basic decision-making process, simplified rangeland ecosystem, and animal survival. The results showed clear co-existence of wealthy and poor herders at an intermediate cost of moving. The movement pattern revealed that an indirect interaction between wealthy and poor herders was the key to their co-existence, suggesting that very simple rules of pastoral mobility inherently contain a mechanism for the co-existence of wealthy and poor herders. At an intermediate cost of moving, the two groups have access to different pastures, thus reducing direct competition for poor herders and enabling their survival in drought years. Such interaction between herders suggests that any interventions in mobile pastoralist societies should take into account that impacts on the mobility of any one group can influence the entire social structure.     

面向多主体用户的茶叶包装迭代设计方法研究

目前设计师在进行包装设计时多以单一用户的需求为主要设计依据,缺乏综合考虑多主体用户需求,因此提出一种基于多主体用户的茶叶包装迭代设计方法。首先通过资料查询及用户调研,提取出企业与消费者共同的需求点,其次运用熵权法确定基于企业需求的重要度,然后利用模糊kano模型确定消费者的必备需求、期望需求以及兴奋需求,最后根据消费者需求分类结果引入重要度调整函数对企业需求重要度进行调整,得出综合考虑企业和消费者的需求重要度,从而找出改进点,指导茶叶包装的迭代设计。以茶叶包装设计为例,验证了该方法的有效性和可操作性。     

Design of an Agent Communication Architecture Based on KQML

Inter-communication marks a highlight of Multi - Agent system research, KQML (Knowledge Query and Manipulation Language) is widely used for agent communication. After analyzing and researching the structure of KQML which including the communication protocol defined in the language, the content of the language, message router and facilitator , we design an agent communication architecture which solves the communication problems of agents in our inte-grative and intelligent backup system ( ADP) and provide its implementation methods.     

基于主体的智能化网络教学系统

本文依据主体以及多主体的概念特点，对网络教学系统的体系结构和编程进行了简略的介绍。     

基于免疫原理的Multi-Agent模型在入侵检测系统中的应用

在分析免疫系统特性以及其与Multi-Agent系统相似性的基础上,采用人工免疫机制对Multi-Agent系统进行优化,并将此优化的Multi-Agent模型在入侵检测系统中加以应用.     

基于多智能体的森林病虫害蔓延模拟研究

在分析多智能体建模仿真方法的基础上,提出了一种研究森林病虫害空间预测的新方法——基于多智能体的森林病虫害的蔓延模拟方法,对这种方法进行了可行性分析,介绍了多智能体模型的构建方式和实现平台,并指出该方法的发展趋势。     

基于GIS与多智能体的建设用地变化仿真研究——以广州市番禺区为例

基于GIS技术和多智能体模型,对应不同的城市规划和土地政策因素输入,利用1998年土地利用图模拟并预测了番禺区2002年的建设用地变化情况,并与2002年的番禺区土地利用图进行了对比,结果表明,基于多智能的模拟结果与实际建设用地空间格局基本一致。