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Application of Multi-agent Models to Urban Expansion in Medium and Small Cities: A Case Study in Fuyang City,Zhejiang Province,China 被引量:5
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作者 ZHANG Jing WANG Ke +3 位作者 song gengxin ZHANG Zhongchu CHEN Xinming YU Zhoulu 《Chinese Geographical Science》 SCIE CSCD 2013年第6期754-764,共11页
In this study, three-phase satellite images were used to define rules for the allocation of time and space in construction land resources based on a complex adaptive system and game theory. The decision behavior and r... In this study, three-phase satellite images were used to define rules for the allocation of time and space in construction land resources based on a complex adaptive system and game theory. The decision behavior and rules of government agent, enterprise agent and resident agent in construction land growth were explored. A distinctive and dynamic simulation model of construction land growth was built, which integrated multi-agent, GIS technology and RS data and described the interaction among influencing agents, Taking Fuyang City in the Changjiang River Delta as an example, an assessment process for the remote sensing data in construction land and scenario planning was constructed. Repast and ArcGIS were used as simulation platforms. A simulation of the spatial pattern in land-use planning and the setting of scenario planning were conducted by using the incomplete active game, which was based on different natural, social and economic levels. Through this model, a simulation of urban planning space and decision-making for Fuyang City was created. Relevant non-structured problems arising from urban planning management could be identified, and the process and logic of urban planning spatial decision-making could thus be improved. Cell-by-cell comparison showed that the simulation accuracy was over 72%. This model has great potential for use by government and town planners in decision support and technique support in the policy-making process. 展开更多
关键词 multi-agent system medium and small cities urban expansion game theory Fuyang City
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峰峰矿区丛枝菌根优势植物重金属积累的比较 被引量:2
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作者 赵昕 吴子龙 +3 位作者 宋庚鑫 张浩 李颖 焦子月 《北方园艺》 CAS 北大核心 2020年第9期104-110,共7页
以峰峰五矿、九龙矿、梧桐庄矿的狗尾草和猪毛蒿为研究对象,测定了丛枝菌根真菌侵染率,并采用火焰原子吸收分光光度法分别测定了植物和土壤中Pb、Cu、Zn、Cr、Mn的含量,通过计算转移系数和富集系数,比较分析了3个矿区中二者对5种重金属... 以峰峰五矿、九龙矿、梧桐庄矿的狗尾草和猪毛蒿为研究对象,测定了丛枝菌根真菌侵染率,并采用火焰原子吸收分光光度法分别测定了植物和土壤中Pb、Cu、Zn、Cr、Mn的含量,通过计算转移系数和富集系数,比较分析了3个矿区中二者对5种重金属的吸收和积累,以期为利用植物-丛枝菌根真菌修复土壤重金属污染提供参考依据。结果表明:狗尾草和猪毛蒿形成的菌根侵染率在梧桐庄矿均为最高,分别达到86.667%和49.033%,自然条件下二者能够与丛枝菌根真菌形成良好的共生关系。狗尾草对Pb和Zn的积累在梧桐庄矿均较优,其中狗尾草地上部Pb含量、地下部Pb含量、转移系数和富集系数分别达到24.157 mg·kg^-1、19.139 mg·kg^-1、1.262和0.156,以及地上部Zn含量、转移系数和富集系数分别达到42.295 mg·kg^-1、1.127和0.259,不仅高于梧桐庄矿的猪毛蒿,也高于五矿和九龙矿的狗尾草。对Cr的积累,狗尾草和猪毛蒿均为五矿高于其它矿区,并且同一矿区狗尾草也高于猪毛蒿。对Cu和Mn的积累,不同矿区2种植物表现不一致,表明不同植物对重金属的吸收积累具有差异。 展开更多
关键词 矿区 丛枝菌根真菌 重金属
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关于角动量的教学探讨
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作者 周鹏宇 李晗 +3 位作者 宋更新 刘帅 王波 侯朴赓 《物理通报》 2018年第12期31-33,共3页
提出了一种讲授角动量的新思路,通过将描述刚体转动的物理量与描述质点运动的物理量类比引入刚体角动量;通过转动定律推导出角动量定理,阐释刚体角动量概念引入的合理性和意义;再利用刚体角动量表达式推导出一般质点和质点系的角动量,... 提出了一种讲授角动量的新思路,通过将描述刚体转动的物理量与描述质点运动的物理量类比引入刚体角动量;通过转动定律推导出角动量定理,阐释刚体角动量概念引入的合理性和意义;再利用刚体角动量表达式推导出一般质点和质点系的角动量,体现角动量概念的普适性. 展开更多
关键词 大学物理 角动量 角动量定理 转动定律
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