نتایج جستجو برای: distribution of population
تعداد نتایج: 21240624 فیلتر نتایج به سال:
extended abstract 1. introduction considering the rapid growth of the world population, it is predicted that in the future the majority of this vast population will be concentrated in cities, particularly cities of developing countries. according to united nations’ prediction in 2000, the world population will surpass 2.06 billion by 2030. this population growth will be specifically more eviden...
In the present era, the importance and role of green space in the life and development of cities are to the extent that it is mentioned as one of the indicators of sustainable development. In sustainable urban development, proportional distribution of green space according to the balanced distribution of the population is one of the principles of establishing geographical justice. The purpose o...
Mortality or death rates are often used as measures of health status for a population. Population-based incidence or morbidity data are available in North Carolina in a few areas such as cancer and certain communicable diseases, but for most chronic diseases we know only how many people died from the disease and not how many are living with it. Given the importance of data from death certificat...
today, with the advanced statistical techniques and neural networks, predictive models of distribution have been rapidly developed in ecology. purpose of this research is to predict and map the distribution of tetranychus urticae koch (acari: tetranychidae) using mlp neural networks combined with genetic algorithm in surface of farm. population data of pest was obtained in 2016 by sampling in 1...
in this study, the spatial distribution of overwintered adults of sunn pest, eurygaster integriceps puton, was investigated by using dispersion parameters and indices, mathematical distribution, and regression techniques in rainfed wheat fields by sample size of 1 m2 in 2009 and 2010. the dispersion parameters including: mean-variance test and clumping parameter () showed that the overwintered ...
any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...
Hearing Loss (HL) represents high genetic heterogeneity with an incidence of almost 1 out of 500 newborns in most populations. Approximately half of the cases have a genetic basis that most of them are autosomal recessive non-syndromic (ARNSHL) with DFNB1-related defect in many worldwide populations. Given the heterogeneity of the trait together with the unique infrastructure of Iranian populat...
Objectives: The present research was carried out with the aim of providing a geographical map and the distribution of indices related to the distribution of human resources in the mental health system in Iran according to regions covered by different medical universities. Method: This study was carried out using the data present in mental health system reports in the year 2007. Subsequent to th...
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