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全局解析冗余关系的混杂系统模式跟踪 被引量:1
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作者 帕孜来.马合木提 杨莲 +1 位作者 罗来龙 张艳丽 《安徽大学学报(自然科学版)》 CAS 北大核心 2014年第5期59-65,共7页
针对混杂系统同时具有连续和离散的运动规律和演化机制,提出一种基于全局解析冗余关系的混杂系统模式跟踪方法.建立混杂系统键合图模型并转化为诊断键合图模型,根据诊断键合图得到系统的全局解析冗余关系和模式变化特征矩阵.利用模式变... 针对混杂系统同时具有连续和离散的运动规律和演化机制,提出一种基于全局解析冗余关系的混杂系统模式跟踪方法.建立混杂系统键合图模型并转化为诊断键合图模型,根据诊断键合图得到系统的全局解析冗余关系和模式变化特征矩阵.利用模式变化特征向量和开关元件导通与关断时开关两端的电压电流变化特征,实现模式变化了的开关元件定位.最后利用Matlab软件对该方法进行仿真实验,实验结果表明基于全局解析冗余关系的混杂系统模式跟踪方法是有效的. 展开更多
关键词 混杂系统 全局解析冗余关系 诊断键合图 模式变化特征 模式跟踪
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Consumption of Ecosystem Services in Laos 被引量:2
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作者 LIANG Yihang ZHEN Lin +3 位作者 JIA Mengmeng HU Yunfeng ZHANG Changshun LUO Qi 《Journal of Resources and Ecology》 CSCD 2019年第6期641-648,共8页
The exponential increase of ecosystem utilization has instigated a serious conflict between ecosystem services and residents'needs.The Belt and Road Initiative has greatly influenced Laotian production and living,... The exponential increase of ecosystem utilization has instigated a serious conflict between ecosystem services and residents'needs.The Belt and Road Initiative has greatly influenced Laotian production and living,and the scientific assessment of the consumption of ecosystem services in Laos is important for exploring residents'influence on the ecosystem.Based on data for the Laotian consumption of agricultural products,fruits and livestock products during 1961-2013,normalized by either harvest index or feed conversion ratio,this study draws three main conclusions.1)Ecosystem service consumption in Laos is centered on the consumption of farmland,forestry and grassland ecosystem services,which account for over 80%,over 10%and under 2%,showing downward,upward and constant trends,respectively.The consumption of these ecosystem services shows a trend of increasing first,then fluctuating,and finally increasing.2)The consumption of ecosystem services in Laos was characterized by the mode of"dominance of consumption of the farmland ecosystem services"from 1961 to 2008,and the mode of“balanced development of consumption of farmland,forest and grassland ecosystem services”from 2008 to 2013,with a trend of transformation from the former into the latter.3)The formation and change in the consumption mode of Laotian ecosystem services have been affected by both supply and trade.Laos developed agriculture mainly during the period from 1961 to 2008,forming the mode of"dominance of consumption of the farmland ecosystem services".This development benefited from the enriched varieties of imports as well as the increased value of trade and import volume.However,the consumption of ecosystem services in Laos after 2008 changed from the mode of“dominance of consumption of the farmland ecosystem services”to one of“balanced development of consumption of farmland,forest and grassland ecosystem services".This study provides an empirical reference for research on the consumption of ecosystem services. 展开更多
关键词 ecosystem services CONSUMPTION CHARACTERISTICS MODE VARIATIONS
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