In many regions both urban expansion and rural development take place simultaneously, and for the purpose of understanding the dynamic process of land use/cover change （LUCC） in such large areas, this study develops...In many regions both urban expansion and rural development take place simultaneously, and for the purpose of understanding the dynamic process of land use/cover change （LUCC） in such large areas, this study develops a multi-agent based land use model. Taking the Poyang Lake area of China as a typical case, this study applies the mechanism of diffusion-limited aggregation to simulate the behavior of urban agents, while rural land use is illustrated with a bottom-up based model consisting of agent and environment layers. In the agent layer, each household agent makes its own decisions on land use, and at each time interval a government agent takes control of land use by implementing policies. According to incomes and the rate of migrant workers, household agents are divided into six categories, among which different decision rules are followed. For complex LUCC in the Poyang Lake area of China from 1985 to 2005, the artificial society model developed in this study yields results highly consistent with observations. Importantly, it is shown that governmental policies can impose significant effects on the decisions of individual household agents on land use and the multi-agent-based land use model developed in this study provides a robust means for assessing the effectiveness of governmental policies.展开更多
The concept of global governance first appeared in research on international political governance in the early 1990s. At the time much of the theoretical research on global governance was to some extent isolated from ...The concept of global governance first appeared in research on international political governance in the early 1990s. At the time much of the theoretical research on global governance was to some extent isolated from the realities of world development, but since the beginning of the 21th century, global governance research has been turning to real world issues, We propose the construction, from a public management perspective, of a governance ＂issue-actor-mechanism＂ framework. This sees postwar global governance practice as the old paradigm. The paper points out that the rapid global development after the end of the Cold War has had a crucial impact on the traditional governance paradigm, followed by the emergence of new global governance issues and changes in new governance actors resulting from the changing world of the last twenty or thirty years which have led to the failure of traditional governance mechanisms. These ＂issue-actor-mechanism＂ changes are closely interlocked, and hence require a new global governance paradigm that can reflect the complex interconnections of governance issues, actors and mechanisms. We thus need to reexamine and refresh our perceptions of the world and open up a new research agenda.展开更多
基金Chinese R&D Program of "Development of a comprehensive monitoring and evaluation system for ecological compensation of typical ecologically vulnerable regions of China (2006BAC08B06)"National Science Fund for Distinguished Young Scholars (40788001)One Hundred Talents Program of the Chinese Academy of Sciences
文摘In many regions both urban expansion and rural development take place simultaneously, and for the purpose of understanding the dynamic process of land use/cover change （LUCC） in such large areas, this study develops a multi-agent based land use model. Taking the Poyang Lake area of China as a typical case, this study applies the mechanism of diffusion-limited aggregation to simulate the behavior of urban agents, while rural land use is illustrated with a bottom-up based model consisting of agent and environment layers. In the agent layer, each household agent makes its own decisions on land use, and at each time interval a government agent takes control of land use by implementing policies. According to incomes and the rate of migrant workers, household agents are divided into six categories, among which different decision rules are followed. For complex LUCC in the Poyang Lake area of China from 1985 to 2005, the artificial society model developed in this study yields results highly consistent with observations. Importantly, it is shown that governmental policies can impose significant effects on the decisions of individual household agents on land use and the multi-agent-based land use model developed in this study provides a robust means for assessing the effectiveness of governmental policies.
文摘The concept of global governance first appeared in research on international political governance in the early 1990s. At the time much of the theoretical research on global governance was to some extent isolated from the realities of world development, but since the beginning of the 21th century, global governance research has been turning to real world issues, We propose the construction, from a public management perspective, of a governance ＂issue-actor-mechanism＂ framework. This sees postwar global governance practice as the old paradigm. The paper points out that the rapid global development after the end of the Cold War has had a crucial impact on the traditional governance paradigm, followed by the emergence of new global governance issues and changes in new governance actors resulting from the changing world of the last twenty or thirty years which have led to the failure of traditional governance mechanisms. These ＂issue-actor-mechanism＂ changes are closely interlocked, and hence require a new global governance paradigm that can reflect the complex interconnections of governance issues, actors and mechanisms. We thus need to reexamine and refresh our perceptions of the world and open up a new research agenda.
