Zero-energy city, sustainable City and zero-carbon city are new terms in cities’ energy management. In this study, a framework of designing a Low-Carbon Eco-City (LCEC) in urban sector of Mashhad with focus on sustainable supply of electrical energy has been simulated. For this purpose, the maximum potential of biomass renewable electricity and expansion of photovoltaic capacity- required to co...

Nowadays transportation problems are drawing more attention with respect to increasing demand for receiving products and services due to population increase and expansion of cities. One of the most important issues of transportation problems which are drawing the attention of the most researchers is vehicle routing problem. In this research, a new linear integer programming for multi-depot vehi...

Objective: Today some of the problems and difficulties in developing countries are related to the manner of their internal migrations. Each year millions of the rural population in the developing countries decided to migrate to the urban areas of these countries and this phenomenon has had negative consequences in the cities. In fact the migration that itself is created by many factors is a...

Following the complex economic and technological changes after the industrial revolution, there was a dramatic change in the size of the cities and the proportion of the population living there which has led to socio-economic damage and adverse environmental impacts, including destruction and alteration of agricultural land use, pollution of air, water and soil. In the meantime, the physical de...

The present study seeks to find an answer to this question, “how effective was the religious and moral advice on environmental health situation of cities under the territory of Al-Buwayh dynasty”? Findings indicate that in the first half of the Al-Buwayh era, following the increase in population and expansion of some cities, the need for health measures in various areas was felt, of which is co...

Objective: Today some of the problems and difficulties in developing countries are related to the manner of their internal migrations. Each year millions of the rural population in the developing countries decided to migrate to the urban areas of these countries and this phenomenon has had negative consequences in the cities. In fact the migration that itself is created by many factors is a...

In this paper, an economic decisions-making model based on mathematics in order to optimize the costs of investment in accordance with innovative technology of human resources recruitment introduced and in the next section, the economic impact of the Internet recruitment technologies has been examined.  In order to fulfill these demands classic economic order quantity model of have developed as...