نتایج جستجو برای: degradation due to population growth
تعداد نتایج: 11049791 فیلتر نتایج به سال:
Clean and green energy consumption has become a global challenge for all developing countries international organizations. Not many studies have examined the impact of preferences on economic growth particularly in counties. Due to rapid increase population desire achieving high growth, demand is upswing The main objective this study develop an empirical model that measures mix 82 countries. PQ...
Due to the continuous exploitation of skipjack tuna in waters Ternate Island, using active pole and line fishing gears, population is suspected experience degradation Island. Therefore, this research was conducted with aim analyzing status populations Island based on dynamics studies, including parameters growth, mortality, recruitment rate. Experimental methods were implemented measure fish le...
پیش بینی سری های زمانی موضوع بسیار مهمی است که کاربردهای فراوانی در زمینه های مختلفی چون پیش بینی نرخ ارز، پیش بینی قیمت سهام ، پیش بینی آب و هوا و غیره دارد. در سال های اخیر تلاش های بسیاری در جهت توسعه و بهبود عملکرد روش های پیش بینی صورت گرفته است. به دلیل عملکرد بهتر روش های غیرخطی در پیش بینی سری های زمانی به خصوص سری های زمانی آشوبگرا، در این تحقیق دو مدل پیشنهادی برپایه روش های غیرخطی بر...
abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...
The objective of this study was to investigate depth perception in astronauts during and after spaceflight by studying their sensitivity to reversible perspective figures in which two-dimensional images could elicit two possible depth representations. Other ambiguous figures that did not give rise to a perception of illusory depth were used as controls. Six astronauts and 14 subjects were teste...
balance among different fractions of a carbon sources is of paramount importance in maintenance of very important in soil quality and environmental health. on the other hand, rapid growth of world population, degradation of agricultural soils, along with release of greenhouse gasses are some of the main challenges of the 21st century. the aim of this study was to investigate the extent of chang...
Examination of the environmental pollution and the factors influencing it by considering the specific characteristics of each country for acheivment to growth and sustainable development and reduse of emission is very important. this study, investigate the effect of productivity and institutional quality on the quality of the environment by using the panel data analysis for 16 developing countr...
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