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在节水灌溉项目投资方案优选的决策过程中,所依赖的信息是"部分完全的"或称"贫信息性",这正是多个方案优选决策的"灰色性"。投资方案的优选决策是一项复杂的、多项因素的工作,要考虑的目标很多,其评价因素和优选结论都具有"不确定性",这实际上是一个多目标的决策问题。针对多个投资方案的优选问题,引入灰色关联度和主成分投影法,通过建立决策模型对投资方案进行优选,提高了优选的精确性和客观性,并通过实例说明该方法来解决多目标的方案决策问题是可行的。 相似文献
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以湖南华菱为代表的湖南钢铁企业,无论在钢铁需求放缓还是回升时期,一直对铁矿石市场不敢不"虎视眈眈",其储备战略除了体现在"走出去"寻找资源外,对国内特别是湖南本土的铁矿石整合力度,也堪称空前。 相似文献
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在水电工程投资方案优选的决策过程中,所依赖的信息是"部分完全的"或称"贫信息性",这正是多个方案优选决策的"灰色性"。投资方案的优选决策是一项复杂的、多项因素的工作,要考虑的目标很多,其评价因素和优选结论都具有"不确定性",这实际上是一个多目标的决策问题。针对多个投资方案的优选问题,引入灰色系统理论中的灰色关联分析法,通过建立灰靶决策模型对投资方案进行优选,提高了优选的精确性和客观性,并通过实例说明应用灰色关联分析法来解决多目标方案决策问题是可行的。 相似文献
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2010年,是"十一五"的收官之年。这一年,广西面对的是极其复杂的国内外环境,又遭遇了百年不遇的特大干旱和洪涝灾害。而这一年,广西国土资源系统涌现出了许多像韦寿增同志那样的先进人物,他们为了保资源保发展、实现2010年广西全社会固定资产投资7800亿元,奉献青春甘洒热血。2011年,是"十二五"开局之年。新的一年,广西提出了完成固定资产投资9900亿元的目标, 相似文献
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《Geoforum》2016
The housing outcomes of immigrants in Canada vary mainly along ethnicity. However, many other factors including place of birth, length of stay in Canada, labour market outcomes, and discrimination among others also play a role. Although general patterns are observable at broad ethnic group levels, vast intra-group differences exist—with housing outcomes potentially being influenced by specific group behaviours such as transnational (housing) activities. This study investigates the relationship between homeownership in Canada and Ghanaian immigrant transnational housing investment. Logistic regression models are fitted on survey data collected among Ghanaian immigrants resident in the Greater Toronto Area. The results show an association between homeownership status in Canada and transnational housing investment. Interestingly, we found that immigrants with on-going housing projects in Ghana were more likely to own a house in Canada. Theoretically the findings demonstrate the importance of including a transnational perspective in immigrant housing integration research. The findings show that it is possible to simultaneously engage in transnational activities and remain integrated in the society of destination areas. This has wider implications for the transnationalism-integration debate within immigrant receiving nations across the world. Recognition of transnationalism as a possible conduit for enhancing integration in destination societies should result in eschewing alarmist perspectives which have been relied on to formulate anti-immigration policies. 相似文献
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Nicola Morrison 《GeoJournal》2000,51(4):339-349
This paper provides an overview of the current literature on why difficulties are being experienced in letting social housing within England. The first part of the paper focuses on whether the management of the social housing stock, and in particular the current allocation system, has contributed to the growing number of difficult to let (DTL) properties in the social sector. Drawing on findings from in-depth interviews with twenty local authorities, the paper provides evidence to support this argument and also highlights a number of initiatives which authorities have adopted to fill DTL properties. However, the paper argues that these initiatives are likely to have limited value in the long run in stemming the fall in demand for social housing, particularly in the North of England. The second part of the paper focuses on the changing aspirations of tenants and the way that social housing is in competition with alternative forms to housing provision, such as private rented housing. It concludes by advocating that an appropriate response to difficulties in letting social housing has to go beyond internal housing management initiatives. Instead a more strategic approach needs to be adopted which builds up an understanding of the operation of the local housing market and the complex interaction of neighbourhoods. 相似文献
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Tuna Tasan 《GeoJournal》1999,49(1):91-103
The aim of this paper is to show how and in what sense the post-socialist transformation process has influenced the urban
spatial structure of Warsaw with the help of empirical evidence dealing with housing. Therefore, the main focus of the study
is the transformation of the housing market in the 1990s under social and economic restructuring process. The article comprises
two parts: the first part involves the geographical development of the urban spatial structure within the context of housing
market changes. In order to explain today's transformation, the system of socialist time is also discussed. In the second
part emphasis is placed on the evidence of the transformation in urban space, dealing with new tendencies and challenging
mechanisms in the housing market. The last period of transformation is also investigated in terms of changes in the urban
space since housing is seen as an important factor of urban transformation. Hence, following the brief outline of historical
development of the urban space housing market changes including the privatization of urban land is going to be the concern
of the paper. The problems of the transformation and practical implementation of the privatization process are also discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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The debate on housing the urban poor has become more sophisticated since Turner’s original ideas of self-help and self-building by the poor were introduced in the 1970s. Today, the emphasis in housing the poor is on a pluralistic approach that stresses enabling housing provision for the poor by expanding the range of providers to include government, the private sector, the poor themselves, non-governmental agencies, and cooperatives. Official housing policy in Ghana does not reflect the pluralistic approach that prevails in practitioner and academic circles. Using ethnography, this paper presents the housing experience of a typical poor family in Ghana to determine what the poor build. It highlights the obstacles the poor have to overcome to acquire the housing they want. The ethnography provides a basis upon which the mismatch between the pluralistic approach and Ghana’s housing policy can be bridged thus providing a way forward. The paper concludes by emphasizing the importance of the housing industry in poverty alleviation in Ghana. 相似文献
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针对中低收入家庭的住房保障这一重大社会问题,研究保障性住房设计,已成为建筑师所面临的现实任务。方案"民居·庭院·住宅",以弘扬民居传统文化为设计理念,提出创造以人为本、融入自然、高科技含量、低成本高质量的特色时代住宅,进而保障中低收入家庭平等的居住权利。 相似文献
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Laurence Murphy 《GeoJournal》2004,59(2):119-126
Housing policy in New Zealand has traditionally been characterised by significant market intervention in support of home ownership
and a residual state housing rental sector. Within the context of dramatic social welfare reforms in the 1990s, a set of radical
housing reforms was introduced that profoundly transformed the role of the state in the housing system. Key elements of the
reforms included the creation of a profit-oriented company to manage state rentals, a move to market rents in the state sector
and the introduction of an accommodation supplement. This paper examines the underlying rationale and impacts of the reforms
focusing on issues of privatisation, tenant turnover, affordability and tenant protest. Having examined the ongoing problems
engendered by these reforms the paper reviews more recent political and legislative reforms that were sought to reassert the
state's traditional position within the New Zealand housing market.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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《Geoforum》2015
The ways in which citizenship and housing are implicated in states’ global city aspirations demonstrate significant path dependency and local contingency. This paper serves to broaden the literature that has been dominated by the Western neoliberal context. First, I argue that The Pinnacle@Duxton – a one-of-a-kind public housing project in Singapore – represents the developmental state’s attempt to graduate its homogeneous public housing landscape, providing for and subsidizing the aspirations of a segment of its increasingly affluent middle class to buy into the ideology of the global city. Second, I show how the graduation of public housing coupled with the exaggerated demand for such exclusive projects validates consumer preference pricing in contemporary public housing. This results in a geographical graduation of citizenship, where the bulk of the population is relegated to lesser options on the edges on the island, unable to fulfil their aspirations for global living. In so doing, I make two contributions to extant literature on housing and citizenship in the global city. One, graduating citizenship is not always a case of states realigning their relationship with their citizens to fit the terms of the market. Two, the denial of citizenship to the global city does not always manifest in terms of substantive rights. Appreciating the unique histories and ideologies underpinning housing policies in global cities is instrumental if the variegated meanings of global cities and the citizenships within are to be elucidated. 相似文献
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Ulrike Sailer-Fliege 《GeoJournal》1999,49(1):7-16
The development of the post-socialist city has already been characterised by substantial restructuring processes. Particular
emphasis should be drawn to the take-off of the tertiary sector and the comprehensive blight phenomena in the previously industrial
areas. The urban housing sector has witnessed increasing housing affordability problems, a marginalisation of communal housing
stock, an increase of segregation and an intensification of the decay in the old housing stock. In all East Central European
states the spatial development processes of industry and services within the cities basically show clear parallels to the
pattern of urban development in continental Europe. In Hungary housing policy, tenure structure and the level of segregation
already show relatively closer similarities to the neoliberal, Anglo–American pattern of development. The other ECE states
show closer similarities to the corporatist welfare states of continental Europe. As far as medium-term urban development
in East Central Europe is concerned, it is to be assumed that – regardless of the specific path of further development – overall
solutions shall not be found for the fundamental problems which are the legacy of the socialist era – the decay of old housing
stock, large scale derelict industrial areas and the extent and deficiencies of high-rise housing estates.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Dawn Day Biehler 《Geoforum》2009,40(6):1014-1023
This paper traces changes in the political ecology of insects and chemicals in US public housing since Congress founded public housing in 1937. Drawing upon the literature of critical geographies of home, urban political ecology, and medical history, it argues that the constitution of “public” and “private” space within public housing was deeply entangled with pest control practices there. Prior to 1945, reformers treated the housing as a commons, in part compelled by the mobility of bedbugs and the pesticide used to combat them, both of which were seen as serious health threats. Managers were also motivated by social welfare ideologies, while residents eagerly assisted with communal control policies in order to achieve freedom from the health insults of bedbugs. Following 1945, however, new synthetic pesticides like DDT seemed to stay safely within one apartment unit, encouraging housing managers to abandon community-oriented pest control practices. Meanwhile, curtailed budgets, particularly after the Housing Act of 1949, left the infrastructure of public housing to decay, rendering units more physically permeable even as managers neglected the communities there. The new pesticides nearly eradicated bedbugs, but tenacious populations of German cockroaches blossomed thanks to the permeable buildings and synthetic pesticides. Residents grew increasingly resistant to pesticide use as they observed that cockroach populations went unabated. The paper serves as a case for applying political ecology frameworks to domestic spaces, and also argues that housing quality and domestic pesticide use are not merely private responsibilities but should be regarded as environmental justice issues. 相似文献