论我国城市开放空间系统的优化

城市开放空间系统优化是强化生态城市建设,进而推动城市可持续发展的重要途径。本文讨论了我国城市开放空间系统优化的重大意义,指出:城市的可持续发展强烈呼唤生态城市建设,而生态城市建设必须以城市开放空间系统的优化为支撑。解析了城市开放空间系统的空间形态结构和要素组成结构,阐明了开放空间系统的实用功能、生态功能、文化功能、景观功能和调控功能等,提出了城市开放空间系统优化的理论基础和应遵循的基本原则。在此基础上,着重论述了城市开放空间系统优化的基本对策和空间布局结构优化、圈层一体化优化、系统要素优化等主要工作内容。     

我国农村救护车资源布局优化:以河南省郸城县为例

优化农村救护车资源的配置有助于缩短急救服务的响应时间,对于维护重症伤(病)员的生命安全具有重要意义。本研究以河南省郸城县为例,将15分钟作为急救车路上所需响应时间,研究了该县当前救护车资源布局下农村居民的可达性;应用ArcGIS中的p-中位模型优化了郸城救护车布局点,并运用SPSS16中的配对样本t检验对比了优化前后郸城居民救护车服务可达性变化;应用ArcGIS中的最小覆盖面模型求解了覆盖郸城县域所需的最少救护车布局点数。研究显示,通过优化能有效提高居民的救护车资源可达性,在县域范围内布局13个左右的救护车资源能基本覆盖所有居民点。这一数量对与郸城具有相似自然社会背景的黄淮海平原县域具有借鉴意义。最后,文章还讨论了研究存在的局限。     

Towards new (graphic) narratives of Europe

The cultural policy of the European Union (EU) has become more important than before as economic crisis threatens to undermine the EU’s nascent political identity. This paper offers graphic narrative (or comics) as a medium particularly suited to the task. This suitability results from several features: (1) the text/image hybridity of comics, which eases translation into multiple languages; (2) the topological aspect of graphic narrative, in which panels compose a spatial network of relations of various intensities that is isomorphic with the theorization of European space offered by a key EU think tank; and (3) the potential for comics of the ‘everyday’ to narrate a plural, non-didactic identity with which both Europeans and others can identify. It is hoped that a policy such as this could have a more positive influence on the more territorial, exclusive notions of the EU.     

基于特色产业簇群的城市群空间结构优化研究

城市群在区域经济社会发展中的作用越来越重要。阐述了产业簇群理论、层域理论、空间相互作用理论和生态学理论等城市群空间结构优化依据。深入分析了特色产业簇群视角的城市群空间结构演变过程。构建了全球、国家和区域等不同尺度的廊道组团网络化城市群空间结构优化模式。最后,作者提出了思想观念创新、市场一体化建设、城乡统筹协调发展、特色产业簇群培育等城市群空间结构优化路径等。     

中国东北地区四中心城市功能关系优化

大连、沈阳、长春、哈尔滨是中国东北地区4个大区级中心城市,在新的历史时期其城市功能定位和发展关系协调至关重要。论文认为,未来15年,沈阳的政治、文化、信息中心作用不会改变,但是,面对其他城市的快速发展和竞争,其大区"龙头"作用特别是经济核心地位会相对下降。大连会渐显其大区核心地位和"龙头"作用。长春、哈尔滨市的次级中心地位依旧,分别承担起国家汽车、光电子、现代农业基地和重型装备制造业、冰雪旅游、对俄贸易中心的功能。     

Simple Homogenization-Topology Optimization Approach for the Pushover Analysis of Masonry Walls

ABSTRACT

A topology optimized rigid triangular FE macro-model with non-linear homogenized interfaces for the pushover analysis of in plane loaded masonry is presented. The shape of the mesh and the position of the interfaces is evaluated through a topology optimization approach that detects the main compressive stress fluxes in the structure. Different values of the horizontal action are considered to derive an adaptive mesh or an optimal discretization that is suitable for multiple loads. Masonry properties are calibrated by means of a homogenization approach in the nonlinear range. To tackle elastic and inelastic deformations, interfaces are assumed to behave as elasto-plastic with softening in both tension and compression, with orthotropic behavior. The two-step procedure competes favorably with classic equivalent frame approaches because it does not require a-priori assumptions on the mesh and on the length of the rigid offsets. An example of technical relevance is discussed, relying into a multi-story masonry wall loaded up to failure.     

Topologies of tourism enclaves

Abstract

Research on tourism enclaves has relied mainly on topographical understandings of the phenomenon. The focus has been on the ontic, that which is or exists instead of the relational qualities or properties of tourism enclaves. Topographical conceptions thus tend to simplify enclavic processes and attributes that are much more complex than meets the eye. In this article, we make the case for topological understandings of tourism enclaves, based on a relational ontology, as a complement. We thereby strive to offer more nuanced conceptions of tourism enclaves. We depart from Agamben’s political ontology to illustrate our claim. Seen topologically, tourism enclaves are not simply spaces marked-off from the norm, but rather constituents of the norm. Tourism enclaves need to be theorized as ‘prototypes’ or ‘laboratories’ of new subjectivities (ways of being, relating, and experiencing the world). The tourist thus emerges as a model figure of biopolitics in the contemporary, the norm rather than the exception. The tourist is not that which is abandoned by the sovereign in the manner of Agamben, but rather a free exilant, a subject that self-willingly chooses abandonment. We deploy topological concepts, like Agamben’s the ban, the camp, and state of exception. Such a conception, we argue, widens the ontological register or horizon of tourism theory.     

Assemblages of State Power: Topological Shifts in the Organization of Government and Politics

Abstract: Multi‐scalar or multi‐site power relations offer two contrasting ways of understanding the shifting geography of state power. In this paper, we argue for a different starting point, one that favours a topological understanding of state spatiality over more conventional topographical accounts. In contrast to a vertical or horizontal imagery of the geography of state power, what states possess, we suggest, is reach, not height. In doing so, we draw from Sassen (2006 , Territory, Authority, Rights: From Medieval to Global Assemblages, Princeton University Press) a vocabulary capable of portraying the renegotiation of powers that has taken place between central government in the UK and one of its key city regions, the South East of England; one that highlights an assemblage of political actors, some public, some private, where negotiations take place between elements of central and local actors “lodged” within the region, not acting “above”, “below” or “alongside” it. The articulation of political demands in such a context has less to do with “jumping scale” or formalizing extensive network connections and more to do with the ability to reach directly into a “centralized” politics where proximity and reach play across one another in particular ways.     

TOPOLOGIES OF HISTORY

History, it is routinely assumed, belongs primarily to time and the temporal. Yet although routine, the assumption is nevertheless mistaken. It is place or topos, which encompasses both time and space (and that is intimately tied to the notion of bound or limit), that is primary here, and so history has to be understood as determined topologically, and not merely temporally. The exploration and elaboration of this claim involves rethinking the ideas of time, space, and place as well as of language and narrative. History appears in its adventual character, but its adventuality is itself seen as a happening of place.     

The Activist Polis: Topologies of Conflict in Indigenous Solidarity Activism

Interpersonal conflict poses a serious threat to social justice activism. In the context of indigenous solidarity activism in southern Arizona, conflicts are often born of the challenges accompanying differentials in social privilege due to differences in race and ethnicity relative to white supremacist settler colonialism. This paper examines activist collaboration between Tohono O'odham and non‐Native anarchist activists in southern Arizona, arguing that a topological activist polis is a useful lens through which we can better understand the roots of conflict in social justice activism. Non‐Native activists are often aware of the ways white supremacist settler colonial society privileges particular identities while marginalizing others. Nonetheless, settler and white privilege give rise to tensions which can be seen topologically through the very different relationships non‐Native and indigenous activists have to ongoing processes of white supremacy and to histories of the genocide of indigenous peoples.