نتایج جستجو برای: scarce water resources is a worldwide problem

تعداد نتایج: 14374369  

Journal: :the archives of bone and joint surgery 0
reinhard graf allgemeines und orthopädisches lkh stolzalpe, 8852 stolzalpe, 38 /austria.

developmental dysplasia of the hip (ddh) is the most frequent developmental disorder of the locomotor system. it is detected among 0.1–5.2% of newborns (1, 2). this might be the reason, that there is a high interest to detect ddh cases as early as possible. undetected or late cases lead to catastrophes for the patient and family. limping, leg length discrepancy, pain, frequent operations and so...

Journal: :تحقیقات اقتصادی 0
غلامعلی شرزه ای دانشیار دانشکده ی اقتصاد دانشگاه تهران وحید ماجد استادیار دانشکده ی اقتصاد دانشگاه علوم اقتصادی

development projects in natural water resources like rivers and lakes, specially transferring water to use in agriculture, domestic and industrial sector without considering environmental values, causes irrecoverable and irreversible damage to ecosystem and future options. if we consider the future generation and species rights, those damages and costs can be very much than we take in. the abov...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده برق و الکترونیک 1390

there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...

2008
ADNAN AL-YASSIN

Due to the rapid expansion of irrigated agriculture, efficient use of the limited water resources in arid and semi-arid regions is becoming more and more vital. However, water salinity is a major problem due to its negative influence on the yields of many crops. It reduces citrus trees’ growth and causes physiological disorders. Salt-stress lowers net CO2 assimilation, stomatal conductance, and...

2005
ADNAN Al-Yassin

Due to the rapid expansion of irrigated agriculture, effi cient use of the limited water resources in arid and semi-arid regions is becoming more and more vital. However, water salinity is a major problem due to its negative infl uence on the yields of many crops. It reduces citrus trees’ growth and causes physiological disorders. Primarily salt-stress lowers net CO2 assimilation, stomatal cond...

Journal: :تحقیقات اقتصادی 0
علی کرامت زاده گروه اقتصاد کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی، گرگان امیرحسین چیذری گروه اقتصاد کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشکدة اقتصاد و توسعة کشاورزی غلامعلی شرزه ای گروه اقتصاد، دانشگاه تهران

policy makers have taken into less consideration the market mechanism in the allocation of water resources, contrary to its long role and precedent in allocation goods and resources. the market mechanism is used in many regions of world for water management to increase the water scarcity certainly, but historical form of acquiring water resources didn’t lead to a proper market so economic price...

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