We develop an ecological network model for urban systems using throughflow and utility analyses. The model uses compartments based on five sectors (energy exploitation, energy transformation, industry, households, and recovery). The trophic levels include energy producers, primary consumers, secondary consumers, and decomposers. The goal is to understand the metabolic system’s network structure...

Upland breeding bird communities were sampled from 225 points in 15 survey routes in the coastal region of western Lake Superior to examine relationships to human land use. Eighty-four species were detected and 50 were abundant enough to be included in data analysis. Monotonic quadratic regression models were constructed for these 50 species by using species counts as the dependent variable and...

Rapid urbanization and rapid urban growth present great challenges to the sustainable utilization of land resources. This paper discusses the on-going process of construction-to-ecological land conversion (CELC) in terms of three aspects: land use, environmental effects, and system responses. CELC is compared to other current land conversion strategies in China. Taking Shenzhen City as an examp...

Based on the Hash mechanism, a new algorithm is presented, the algorithm can realize search, update, deletion and addition operations for dictionary. According to the characteristics of Chinese characters GB code, by preserving the GB code of first word in entry, this method effectively improves the utilization rate of the storage space. In the dictionary, the one-to-many corresponding relation...

Little urban ecological research has been done in South Africa. The papers in the Ecology and Society special feature Urban Ecological and Social-Ecological Research in the City of Cape Town make, therefore, an important contribution to the development of urban ecology locally and globally. Different approaches have been used in the study of urban ecology of different urban areas in South Afric...

the current paper seeks to study the effects of relationship quality on customer’s behavioral responses at different stages of the relationship life cycle in iran's banking industry. in this respect agriculture bank of iran was selected as the target population of the suggested theoretical model of this experiment and 417customers of the bank have participated as the statistical samples to...

This paper develops an integrated strategy to model the urban development and ecological dynamics in the Central Puget Sound Region. This effort is part of the Puget Sound Regional Integrated Synthesis model (PRISM) – an interdisciplinary initiative at the University of Washington aiming to develop a dynamic and integrated understanding of the environmental and human systems in the Puget Sound....

logistic regression (lr) was used to model urban growth between the years 1987 and 2001 in gorgan city, north east of iran. three groups of variables including economic-social, land use and biophysical variables were used in the modeling practice. using covariance of the independent variables, distance to administrative and sporting centers plus distance to cities were removed. roc (relative op...

We used the SLEUTH urban growth model, closely coupled with a land transition model, to simulate future urban growth in the Houston metropolitan area, one of the fastest growing metropolises in the United States during the past three decades. The model was calibrated with historical data extracted from a time series of satellite images. Three specific scenarios are designed to simulate the spat...

This study focuses on the spatial characteristics of the economic impact of a wine sector on rural and urban local areas. It is applied to the Bordeaux vineyard. A model associating a gravity analysis of indirect effect diffusion and a hierarchical urban system is used to analyse agriculture-industry linkages. Results indicate that the economic impact of winery activities are mainly concentrate...