Spatial Diffusion Model Analysis and Trend of Shizuishan City

2012 ◽  
Vol 174-177 ◽  
pp. 2370-2373
Author(s):  
Bin Feng ◽  
Xiao Jian Chen

The urban expansion direction and mode of Shizuishan City is addressed based on GIS and improved spatial diffusion model-replacing the spatial straight distance with cost weighted distance. This paper divides its spatial expansion into four cases: zero resistance, resistance, incomplete barrier and isolation. The diffusion model of urban space in terms of the new understanding of the resistance barrier in the spatial diffusion process is discussed. Then, this paper puts forward new trends of spatial development. The results reveal that Dawukou city area and Pingluo city, and Wuhai city and Huinong district form the coordination development tendency.

2018 ◽  
Vol 11 (3) ◽  
pp. 34
Author(s):  
José Queiroz de Miranda Neto ◽  
José Antônio Herrera

ResumoEste artigo analisa o processo de expansão urbana recente em Altamira – PA, de modo a verificar as novas tendências de crescimento a partir da instalação da usina hidrelétrica de Belo Monte. São utilizados como bases teóricas os conceitos ligados à morfologia urbana e à produção social do espaço urbano. A expansão urbana recente se constitui a partir de fatores articulados ao processo de instalação da usina hidrelétrica, onde se verifica um crescimento acelerado da malha urbana em várias direções, respeitando o sentido das vias estruturantes. Tal crescimento chega a ultrapassar 50% e se dá a partir de novas instalações urbanas para habitação e uso coletivo, públicas e privadas, que alteram o desenho da cidade, sua paisagem e estrutura urbana. Nesse novo cenário, cabe destaque ao papel dos agentes imobiliários e do poder público, bem como da empresa Norte Energia S.A como indutora de processos e agente ordenador do território.Palavras Chave: Expansão urbana, morfologia, Altamira, Belo Monte.  AbstractThis article analyzes the process of recent urban expansion in Altamira, Pará State, in order to check for new growth trends after the implementation of the hydroelectric plant of Belo Monte. The concepts related to urban morphology and social production of urban space are used as theoretical basis to this study. The recent urban expansion is composed by factors related to the hydroelectric plant implementation process, which shows a rapid growth of the urban mesh in several directions, respecting the way of structuring roads. Such growth exceeds 50% and it happens by means of public and private new urban facilities for housing and collective use that alter the design of the city, its landscape and urban infrastructure. In this new scenario, it is highlighted the real estate agents’, government’s, and  Norte Energia corporation’s roles, being the former one considered an originator territory agent and responsible for  inducing this processes.Keywords: urban expansion, morphology, Altamira, Belo Monte.  ResumenEn este artículo se analiza el proceso de reciente expansión urbana en Altamira-PA, con el fin de comprobar si hay nuevas tendencias de crecimiento después de la instalación de la central hidroeléctrica de Belo Monte. Se utilizan como base teórica los conceptos relacionados con la morfología urbana y la producción social del espacio urbano. La reciente expansión urbana se constituye a partir de factores relacionados con el proceso de instalación de la planta hidroeléctrica, donde hay un rápido crecimiento de la red urbana en varias direcciones, respetando el modo de estructuración de las carreteras. Este crecimiento es superior al 50% y se produce a partir de nuevos equipamientos urbanos para viviendas y uso colectivo, públicos y privados, que alteren el diseño de la ciudad, su paisaje y la estructura urbana . En este nuevo escenario, hay que destacar el papel de los agentes de bienes raíces, el gobierno y también del Norte Energia S.A , que induce procesos y articula el territorio .Palavras Chave: expansión urbana, morfología, Altamira, Belo Monte. 


2018 ◽  
Vol 18 (1) ◽  
pp. 59-80 ◽  
Author(s):  
Janine Hauer ◽  
Jonas Østergaard Nielsen ◽  
Jörg Niewöhner

Hope is much discussed as a future-oriented affect emerging from uncertain living conditions. While this conceptualisation illuminates the role that hope plays in shaping life trajectories, hope itself remains largely unaddressed. In this paper, we approach hope ethnographically as practice through the lens of material-semiotics. We draw on fieldwork in Ouagadougou, Burkina Faso, where hoping turns out to be co-constitutive of peri-urban life and landscape. We challenge person-centred understandings of hope in order to bring materiality back in two ways: first, hoping in its various modes and forms is always situated in particular settings, thus, its enactment has to be reflected; and second, hoping “takes place”, it is co-constitutive of the transformation of urban life. Additionally, we consider the temporality of hoping and highlight how hoping persists through urban space. We conclude that a more profound and thoroughly materialised understanding of hoping’s generative and stabilising potential may strengthen the role of anthropology in current research on socio-ecological transformations.


Author(s):  
Allison L. C. Emmerson

“Gods outside the Walls” approaches the chief exception to the standard patterns of suburban development. Temples for the gods appeared outside Rome’s early colonies at Minturnae, Ostia, and Cosa already in the mid-Republican period, and certain examples, including a sanctuary at Hispellum and the shrine to Magna Mater in Rome’s Transtiberim, thrived through the fourth century CE. These spaces functioned in various ways, but indicate above all the enduring need for gods to protect and define all parts of a city, through even dramatic alterations to urban space. Early colonial sanctuaries oversaw not just urban expansion, but the active transformation of military outposts to urban centers, while the later temples survived the contraction of cities by reserving space for traditional modes of worship, even as a new force—Christianity—rose up to dominate Italy’s suburbs.


2020 ◽  
Vol 10 (20) ◽  
pp. 7041
Author(s):  
Wenqi Ding ◽  
Chao Duan ◽  
Qingzhao Zhang

Grouting reinforcement is an important method used to solve problems encountered during tunnel construction, such as collapse and water gushing. The grouting diffusion process is greatly influenced by the structural characteristics of the fractures in a rock mass. First, an analytical grouting diffusion model of a single rough fracture under constant-pressure control is established based on the constitutive equation of a Bingham fluid. Second, the “quasi-elliptical” grouting diffusion pattern under the influence of roughness is revealed through a grouting diffusion experiment, which is conducted with an independently developed visualized testing apparatus. Furthermore, the analytical formula of roughness-corrected grouting diffusion characterized by the saw tooth density is established. Finally, an elaborate numerical simulation of the diffusion process of cement slurry (Bingham flow type) in a single rough fracture is carried out by introducing the Bingham–Papanastasiou rheological model. The temporal and spatial distribution characteristics of the velocity field and pressure field during the grouting diffusion process are analyzed as well. Moreover, the method and range of the roughness correction factor in the analytical grouting diffusion model are proposed based on the fracture roughness unit.


2019 ◽  
Vol 14 (3) ◽  
pp. 717-737 ◽  
Author(s):  
P.K. Kapur ◽  
Saurabh Panwar ◽  
Ompal Singh

Purpose This paper aims to develop a parsimonious and innovative model that captures the dynamics of new product diffusion in the recent high-technology markets and thus assist both academicians and practitioners who are eager to understand the diffusion phenomena. Accordingly, this study develops a novel diffusion model to forecast the demand by centering on the dynamic state of the product’s adoption rate. The proposed study also integrates the consumer’s psychological point of view on price change and goodwill of the innovation in the diffusion process. Design/methodology/approach In this study, a two-dimensional distribution function has been derived using Cobb–Douglas’s production function to combine the effect of price change and continuation time (goodwill) of the technology in the market. Focused on the realistic scenario of sales growth, the model also assimilates the time-to-time variation in the adoption rate (hazard rate) of the innovation owing to companies changing marketing and pricing strategies. The time-instance upon which the adoption rate alters is termed as change-point. Findings For validation purpose, the developed model is fitted on the actual sales and price data set of dynamic random access memory (DRAM) semiconductors, liquid crystal display (LCD) monitors and room air-conditioners using non-linear least squares estimation procedure. The results indicate that the proposed model has better forecasting efficiency than the conventional diffusion models. Research limitations/implications The developed model is intrinsically restricted to a single generation diffusion process. However, technological innovations appear in generations. Therefore, this study also yields additional plausible directions for future analysis by extending the diffusion process in a multi-generational environment. Practical implications This study aims to assist marketing managers in determining the long-term performance of the technology innovation and examine the influence of fluctuating price on product demand. Besides, it also incorporates the dynamic tendency of adoption rate in modeling the diffusion process of technological innovations. This will support the managers in understanding the practical implications of different marketing and promotional strategies on the adoption rate. Originality/value This is the first attempt to study the value-based diffusion model that includes key interactions between goodwill of the innovation, price dynamics and change-point for anticipating the sales behavior of technological products.


2013 ◽  
Vol 444-445 ◽  
pp. 1255-1259
Author(s):  
Hai Hong Liu ◽  
Xi Ping Yuan ◽  
Shu Gan ◽  
Hai Qing Yan ◽  
Xiao Lun Zhang ◽  
...  

With the rapid development of city, many large and medium-sized cities sprawl in urban space,triggering a series of socio-economic issues related to land-use. Based on RS and GIS, selected Kunming as study area for its typical representation of Yunnan plateau mountain cities, used the method of spatial quadrant orientation analysis, obtained the number and structure of construction land expansion in specific direction of study area in period of two different years, and calculated the intensity index and fractal dimensions of the urban expansion. Finally, according to local conditions, spatial expansion variations features of Kunming were analyzed systematically.


1992 ◽  
Vol 18 (8) ◽  
pp. 965-974 ◽  
Author(s):  
Robert P. Sechrist

2019 ◽  
Vol 17 (10) ◽  
Author(s):  
Narimah Samat ◽  
Mohd Amirul Mahamud ◽  
Siti Masayu Rosliah Abdul Rashid ◽  
Yasin Elhadary ◽  
Norzailawati Mohd Noor

Rapid urbanisation has raised major issues, especially in cities in developing nations. In Malaysia, for example, the urbanisation rate is at 74%, but the size of urban land is less than 10%. This phenomenon has caused urban expansion to encroach on to its fringe areas. At present, although much has been said about the economic benefits of urban expansion to the fringe areas, yet little is known about its impact on the local communities. This paper aims to highlight the spatial expansion of George Town Conurbation and to investigate how local inhabitants perceive urban development. This study used satellite images and GIS techniques to identify the spatial expansion of urbanisation in George Town. Quantitative and qualitative approaches of data collection were employed to investigate the impact of urbanisation on the communities. The findings indicated that the inhabitants in less urbanized states welcome urban expansion, as they perceive that urban growth generates more jobs and brings economic opportunities. On the contrary, those who have experienced a longer period of urban development did not fully welcome urbanisation. Therefore, inclusive development policies are required to ensure that urban growth will benefit dwellers in the urban area as well as in its surroundings. In addition, they are required to safeguard the environment.


2004 ◽  
Vol 6 (1) ◽  
pp. 85 ◽  
Author(s):  
Solismar Fraga Martins ◽  
Margareth Afeche Pimenta

Rio Grande, cidade portuária e primeira demarcação lusitana nas terras rio-grandenses apresentou um rápido processo de industrialização no final do século XIX, resultado da acumulação de capital comercial, proveniente das atividades de importação e exportação. Celeremente, plantas industriais com base produtiva diversificada foram instaladas, expandindo a antiga cidade comercial e conformando o espaço urbano através da introdução de novas estruturas produtivas e de uma excelente base técnica que conformaram os sentidos da expansão urbana, compondo, de forma dual, movimento de renovação arquitetônica em moldes europeus e vilas operárias. Tal realidade se manteve até 1950, quando a economia industrial começa a dar mostras de debilidade, restringindo ou fechando parte de seu parque fabril. De forma paralela, ocorre uma proliferação de todo tipo de loteamento privado, originando as “vilas” periféricas e ocasionando a ruptura entre a cidade e a indústria.Palavras-chave: configuração espacial urbana; ciclos produtivos industriais; história urbana; vilas operárias; patrimônio arquitetônico. Abstract: Rio Grande, a city with an harbor, and the first Portuguese landmark in the Rio Grande do Sul state, presented a fast industrialization process at the end of the nineteenth century, due to commercial capital accumulation originated from import and export activities. Quickly, industrial plants of different sectors were established, enlarging the old commercial city and modeling the urban space through the introduction of new productive structures and excellent technical basis that defined the trends of the urban expansion, composed both by an architectural renewal movement based on the European model and workers’ villages. Such reality was kept until 1950, when the industrial economy began to show economical weakness, restraining or closing part of its industrial park. Simultaneously, a proliferation of all kinds of private lots took place in the city, creating peripheral villages and provoking the rupture between the city and the industrial activity.Keywords: urban spatial configuration; industrial productive cycles; urban history; workers’ villages; architectural patrimony.


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