نتایج جستجو برای: the population growth
تعداد نتایج: 16303255 فیلتر نتایج به سال:
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...
Today, the population variable and its related specifications is basic infrastructure in the areas of economic and social planning and policy making. The population, including important component of economic and social in a society that has on economic performance and social community is effective and at the same time economic and social policies are also affected, so that changes in population...
Effective transportation systems lead to the efficient movement of goods and people, which significantly contribute to the quality of life in every society. In the heart of every economic and social development, there is always a transportation system. Meanwhile, traffic congestion has been increasing worldwide because of increased motorization, urbanization, population growth, and changes in p...
This paper focuses on the role of uncertainty about the number of surviving children. The survey discusses the effects of declining mortality rates on fertility, education and economic growth. The construction of the paper is an OLG model in which individuals make choices about fertility decision over their lifetimes subject to uncertainty about the immortality. The simulation of model using ac...
To describe the dynamics of stage-structured populations with m stages living in n patches, we consider matrix models of the form SD, where S is a block diagonal matrix with n× n column substochastic matrices S1, . . . , Sm along the diagonal and D is a block matrix whose blocks aren× n nonnegative diagonal matrices. The matrix S describes movement between patches and the matrix D describes gro...
Population changes have undoubtedly impact on policymaking for governmental and private organizations. According to census 1395, North Khorasan province and Hamedan province have experienced a negative population growth rate. Hamedan province with population growth rate -0.23% annually has the lowest rate among all provinces in Iran. Population growth as consequences of several components is c...
Controlled branching processes are stochastic growth population models in which the number of individuals with reproductive capacity in each generation is controlled by a deterministic function. The behaviour of these populations is strongly related to the main parameters of the offspring distribution. In practice these values are unknown and their estimation is necessary. Usually it must be ob...
The Australian Government is about to release Australia’s first sustainable population policy. Sustainable population growth, among other things, implies sustainable energy demand. Current modelling of future energy demand both in Australia and by agencies such as the International Energy Agency sees population growth as one of the key drivers of energy demand. Simply increasing the demand for ...
Florida ziziphus Ziziphus celata is a self-incompatible clonal shrub comprising fewer than a dozen remnant, uniclonal populations in south-central Florida, USA. We model the population viability of this highly endangered species based on 9 yr of data from 2 populations. The matrix projection model is based on hypothetically independent ‘plants’ defined as clumps of ramets within a 25 cm radius....
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