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零摄氏度的空气

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The grain size composition of the soil affects the soil physical and chemical properties, this is the hydrometer method using several rocks in the southwest area of soil (soil, lime soil, volcanic ash soil) of the grain size were measured and The following conclusions:⑴ South West Rocks into the soil, purple soil, limestone soil and volcanic ash soil particles share of major sand, clay, silt smaller ⑵ between the different layers of the same soil, due to deposition and other effects of leaching and soil composition on the lower classes there are some differences in grain size, black limestone soil of sand and clay content with depth was The volcanic ash soil sand and clay content with depth ⑶ different locations the same soil as weathering, leaching and the impact of human activities to varying degrees, the composition of the soil there are some differences in grain ⑷ the same layers of soil, due to different soil-forming rock, sand soil developed over sandstone, limestone, shale rock clay and ⑸ the same soil types in different subgroups of the soil, particle composition is different, but similar
85 评论

刘思韵2522

学位外语(土木) 开放教育学习指南 计算机应用基础(本) 英语Ⅱ(1) 英语Ⅱ(2) 学位论文指南 工程地质 工程数学(本) 建筑结构试验 土木工程力学(本) 土木工程CAD 混凝土结构设计原理 土木工程询价与估价 高层建筑施工 工程经济与管理 建设监理 地域文化(本) 素质与政治思想教育 实用法律基础

351 评论

请别叫我龙爷

是这么?:TWO-SECTOR, THREE-MARKET CIRCULAR FLOW:A circular flow model of the macroeconomy containing two sectors (business and household) and three markets (product, factor, and financial)两因素,三市场环形流宏观经济学中,一个环形流模式包含两个因素(商业和家庭)和三个市场(产品市场、代理市场和金融市场)

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伊可grace

你给的网址太大了,进去看不到文章,帮不了 你……

273 评论

QQ荔枝蜜

Lin G C S, Yi F Urbanization of capital or capitalization on urban land? Land development and local public finance in urbanizing China[J] Urban Geography, 2011, 32(1): 50- Robalino J A Land conservation policies and income distribution: who bears the burden of our environmental efforts?[J] Environment and Development Economics, 2007, 12(4): 521-

352 评论

linkaixinlang

Multiple and intensive land use: case studies in Hong Kong  S S Y Lau, R Giridharan and S Ganesan,  Department of Architecture, University of Hong Kong, Hong Kong, Hong Kong  Available online 01 January   Abstract  Multiple Intensive Land Use (MILU) achieves intensification of land use through mixing residential, commercial and other uses at higher densities at selected urban locations, while being supported by an efficient public transport and pedestrian Successful case studies in Hong Kong have more than five uses, Residential, Commercial, Recreational, Community facilities and Transport The residential component in these projects is usually between 30% and 65% of the total gross floor The MILU concept is being implemented in subsidized public housing projects as Multiple land uses within the podium, together with access to five or more modes of public transport and an accessible network of multilevel pedestrian links create the necessary variety, vitality and The paper examines three different generations of MILU fabric and discusses the integrating design variables, while focusing on the life style and design approaches of Hong K  Author Keywords: Multiple intensive land use (MILU); Urban space; High-density; High-rise; Podium design  Article Outline  • Historical introduction to MILU  • Objective and approach  • Multiple intensive land use practice  • Fundamental approach underpinning multiple intensive use in Hong Kong  • Verticality  • Space proximity  • Compactness  • Sky city  • Case studies  • Hong Kong case study 1: Mei Fu Sun Chuen development  • Hong Kong case study 2: Metro-city development  • Hong Kong case study 3: Kowloon Station  • Analysis of case studies in Hong Kong  • Residential density and development intensity  • Land use and amenities: Facilities within site and access to urban services  • Form and design  • Transport modes and pedestrian links  • Local property market and environmental quality  • Future urban design in Hong Kong  • Conclusions  • Acknowledgements  • References  Historical introduction to MILU  The ever-increasing world population has continually stressed the need for intensive but sustainable There is a strong belief among professionals that multiple intensive land use (MILU) has the potential for achieving sustainable development (Walker, 1997) But, there is limited empirical evidence as yet to support such a contention ( Rowley, 1998) Mixed use can be broadly defined as multiple land use where no one type As a guideline, floor area allocated to any single use in a development should not be more than two-thirds of the gross floor area of the entire Multiple uses have been categorized as mixing of revenue producing uses commercial, residential, recreational, institutional and industrial including different types of housing, owner occupied and rented accommodation, public and private uses, as well as accommodation of different social groups ( Coupland, 1997)  Most of the European cities before the industrial revolution were of mixed use and self sustained low-density locations (Coupland, 1997); people had shops and offices on the ground floor and the residential facilities on the upper level or These cities became crowded after the industrial Architects and urban designers responded to these population pressures with distinct patterns of Technological developments within and outside the building industry significantly influenced the emerging concepts and urban The suburbia concept was prominent among For example, Frank Lloyd Wright conceptualized the Broadacre City in the1920 s as a suburban model for American cities, partially as a response to higher residential densities building up within existing urban The Broadacre City accommodated various uses in a land of four square miles at low Its viability was predicated on high automobile Lloyd's concept also displayed a particular architectural character in the eyes of many (Krohe, 2002) In principle the suburbia concept became popular with better access to automobiles and speedier transport facilities ( Argan, 1968; Krohe, 2002)  Le Corbusier floated the Radiant city concept in 1933, which also could be described as a response to increasing population and The concept incorporated mega structures with multiple uses where the buildings stood out in contrast to nature and in a less harmonious posture with the existing landscape (Argan, 1968) Le Corbusier's concept was considered a machine age product and never materialized, perhaps because it was not socially acceptable at that This machine age character was to be seen on a small scale in his later design of the Indian city of C  Fishman (1998) has postulated that Ebenezer Howard's “Garden City” concept was not entirely new, and incorporated features advocated by Lever (1852–1925) and George Cadbury (1839–1922) in their designs developed for the industrial workers in UK The garden city concept provided the impetus for Greater London's expansion in 1944, which was achieved at low density and dominated more by diverse, single use concepts rather an integrated multiple land use This diversity was carved out on a human scale amidst the existing green and natural The garden city concept was essentially a suburbia In the end all these suburbia concepts led to urban sprawl and created other environmental problems such as privatization of open space, soil erosion, fragmentation and reduction of agricultural land and water bodies and reduction of social capital ( Rowley, 1998; Coupland, 1997; Freeman, 2001) House building on private plots in the suburbia demanded large tracts of land for infrastructure and social Especially, the hard surfaces of the road networks contributed to urban heat island Urban migration and huge increases in population also indirectly compounded the problems of the   Planners had to respond to this in part by developing high-density residential settlements within the city Until the 1960s, to a large extent these developments in both American and European cities were developed on a single use-zoning plan; the developers in the UK often rejected mixed-use models on the grounds of high development costs (Coupland, 1997; Rowley, 1998; Zhang, 2001) Cities such as Chicago, Los Angeles, Berlin, Liverpool, Manchester, Paris and etc incorporated low-rise walk-up apartments in single use neighborhoods at moderate densities to accommodate the industrial workers especially after Second World W In the mid-1960s Asian cities such as Bombay, Karachi, Colombo, Bangkok and Seoul also adopted similar low-rise This concept of low-rise walk-up apartments was never really successful in North America, Europe and in many parts of A This was largely due to mono-zoning and lack of public transport ( Jones, 2000) Mono-zoning effectively discouraged the provision of a well-diversified social infrastructure, and access to employment Lack of readily available employment opportunities often led youths into crimes ( Zhang, 2000) Mono-zoning in practice limited opportunities for cross subsidizing residential projects taking advantage of associated and lucrative commercial land Especially, impoverished were the public sector and local authorities empowered to provide subsidized Forced to achieve harsh economies in design, essential amenities and security provisions were Furthermore, the multiple land use concept was often wrongly identified as In some instances, planners and local authority officers had advocated mono-zoning purely to promote better hygiene and avoid fire   In contrast, cities like Hong Kong and Singapore has followed the high-rise, high-density and multiple intensive land-use concept successfully during the latter part of the 20th century (Zhang, 2000) Hong Kong is unique because it experiences extreme population growth and overcrowding, scarcity of serviced and buildable land, and intensification of land-use, while being poorly endowed in natural resources and raw Hong Kong when compared to Singapore has only 17,600 ha of buildable land to house a population of 7 Among the cities mentioned in the Table 1, Paris has the second highest net density but the city has a land area of 10,500 In contrast, Hong Kong island and Kowloon has a high net density in the range of 2500–3000 person/ha but the land areas are 8000 and 4500 ha,   ……  Among the highly urbanized countries, the United States follows horizontal expansion while France and the Netherlands tend to emphasize vertical Hong Kong has the highest emphasis on vertical expansion and over- Yet, the story of Hong Kong as a Sky City attracts the widest interest of urban designers and urban managers seeking to acquire clues to the successful management of limited land and other resources, and more importantly to maintain a vibrant and rich living and working culture in a vertical land use   Mega-Cities incorporating high-density developments emerged in the metropolises of the industrialized countries especially North America since the Later North American cities had also adopted performance based mixed-use development models to improve the quality of high-density development (Marwedel, 1998) However, the western models of mixed-use patterns have not found as much favour with most professionals ( Jacobs, 1961; Jenks, 2000; Burgess, 2000; Coupland, 1997; Zhang, 2000) It is beyond the scope of this paper to examine the western models in detail, but some relevant parallels will be drawn from the Western experience

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