Globalization and market reforms have significantly facilitated urban transition and urbanization in the People’s Republic of China, greatly affecting the structural and spatial redistribution of Chinese cities since the founding of the People’s Republic in 1949. Prior to the 1978 economic reforms, the system of cities created by the Maoist regime was dominated by large and extra-large cities b...

The Traveling salesman problem (TSP) is proved to be NP-complete in most cases. The genetic algorithm (GA) is one of the most useful algorithms for solving this problem. In this paper a conventional GA is compared with an improved hybrid GA in solving TSP. The improved or hybrid GA consist of conventional GA and two local optimization strategies. The first strategy is extracting all sequential ...

This chapter discusses theoretical and applied research in urban economics on decentralized cities, i.e., cities in which employment is not restricted to the central business district. The first section discusses informally the incentives that firms face to suburbanize. The next section summarizes the theoretical literature on decentralized cities, including both models which solve for the opti...

Population density gradients for South Africa’s cities are quite small in absolute value, indicating a relatively flat population distribution across the cities. In contrast employment is less flatly distributed than the population. The relationship between employment densities and distance across South African cities has remained constant between 1996 and 2001 whilst there has been on average ...

This paper presents an analysis of the topology of transportation networks within different systems of cities. Urban entities and their components are complex systems by their nature; there is no central force that affects their spatial structure. Thus, we study transportation networks within different countries as complex networks. Based on the above, we consider cities as nodes, while direct ...

BACKGROUND In a changing climate, increasing temperatures are anticipated to have profound health impacts. These impacts could be mitigated if individuals and communities adapt to changing exposures; however, little is known about the extent to which the population may be adapting. OBJECTIVE We investigated the hypothesis that if adaptation is occurring, then heat-related mortality would be d...

1 If we postulate the usual list of forces, cities should fly apart. The theory of production contains nothing that holds a city together. A city is simply a collection of factors of production – capital, people, and land-and land is always far cheaper outside cities than inside. Why don't capital and people move outside combining themselves with cheaper land and thereby increasing profits? Of ...