نتایج جستجو برای: o p t i m a l s o l u t i o n s t h a t m a i n t a i n a p r o b a b i l i t y o f c o n s t r a i n t s a t i s f a c t i o n t h e n

تعداد نتایج: 15602024  

Journal: :تحقیقات جغرافیایی 0
احمدرضا قاسمی گروه جغرافیای طبیعی داانشگاه تبریز علی اکبر رسولی گروه جغرافیای طبیعی داانشگاه تبریز علی اکبر رسولی گروه جغرافیای طبیعی داانشگاه تبریز سعید جهانبخش گروه جغرافیای طبیعی داانشگاه تبریز سعید جهانبخش گروه جغرافیای طبیعی داانشگاه تبریز

the study of spatial and temporal changes in climate parameters, is one the most important issues in the world's climate research. study of changes in cloud cover as one of the most important climate parameters is important, because clouds are in top of hydrologic cycle and changes in them make changes in spatial and temporal variations in other climate parameters. in this study, the spati...

Journal: :پژوهش های ایران شناسی 0
علیرضا خسروزاده استادیار گروه باستان شناسی دانشگاه شهرکرد محمود حیدریان استادیار گروه باستانشناسی دانشگاه شهرکرد حمید محمدی دانش آموختۀ کارشناسی ارشد باستان شناسی دانشگاه شهرکرد

the district of miyān kūh in the ardal town,chahār mahāl bakhtiari province, because of its high mountains, deep valleys and the fields among small mounts, being placed in the path of the was dering tribes has been the focus of the attention. the rigion has two different viewpoint. one part featuring the mounts chēhēl cheshme and gereh with the altitude of more than 3500 m., has cold winter and...

Journal: :جنگل و فرآورده های چوب 0
مقدسه اکبری دانش آموختۀ کارشناسی ارشد، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران نادیا کبودی ترابی دانش آموختۀ کارشناسی ارشد، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران حسین رسالتی استاد، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران قاسم اسدپور اتویی استادیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران محمدرضا دهقانی فیروزآبادی دانشیار، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

in this study, precipitated calcium carbonate (pcc) was modified using cationic starch, and its effect on optical and physical properties of paper was examined in comparison with unmodified filler afterwards. to determine the filler retention in paper, both modified and unmodified fillers were added to pulp suspensions by 20, 30, and 40 percentages. for comparing the utilization effect of modif...

Journal: :علوم باغبانی ایران 0
نجمه زینلی دانشجوی دکتری دانشگاه تهران مجتبی دلشاد استادیار، پردیس کشاورزی و منابع طبیعی کرج، دانشکده علوم زراعی و دامی، گروه علوم باغبانی و فضای سبز، تخصص: فیزیولوژی و اصلاح سبزی¬ها/ تولید گلخانه ای/ سیستم هایدروپونیک عبدالکریم کاشی استاد دانشگاه تهران کمال الدین حق بین استادیار پژوهشگاه ملی مهندسی ژنتیک

this study was conducted to determine water stress tolerance of two iranian dudaim melons (kerman & birjand) and one iranian muskmelon (samsoury). throughout the experiment, three different levels of irrigation with three irrigation starting points (-50, -65 and -75 cb of matric potential) were employed. results indicated that water stress significantly affected yield, firmness, fruit sugars as...

Journal: :journal of research in medical sciences 0
zahra maghsoudi food security research center, isfahan university of medical science,isfahan, iran reza ghiasvand food security research center and department of community nutrition, school of nutrition and food science,isfahan university of medical science,isfahan, iran gholamreza askari food security research center and department of community nutrition, school of nutrition and food science,isfahan university of medical science,isfahan, iran leila darvishi food security research center, isfahan university of medical science,isfahan, iran shekoofe ghasemi food security research center, isfahan university of medical science,isfahan, iran mitra hariri food security research center, isfahan university of medical science,isfahan, iran

normal 0 false false false en-us x-none ar-sa background: stroke is one of the most common causes of disabilities and death all over the world. the mortality rate of stroke is predicted to be doubled by 2030 in the middle east countries. nutrition is an effective strategy in prevention and management of stroke. this study assessed the relationship between various protein types and stroke risk. ...

Journal: :تحقیقات آب و خاک ایران 0
سمانه کارگر علی رئیسی حسن رحیمی

gypsum found in the soil beneath the foundation of structures, specially hydraulic structures, can cause serious damage to them. the mechanical behavior of gypsiferous soils has not so far been investigated in detail except for the works of petrukhin (1993). here, it has been tried to investigate the mechanical behavior and the effect of soil being leached on settlement and strength of these ki...

Journal: :علوم باغبانی ایران 0
مرتضی سلیمانی اقدم یونس مستوفی علیرضا مطلبی آذر جواد فتاحی مقدم محمود قاسم نژاد

to inspect the effect of methyl salicylate (mesa) vapor on fruit shelf life quality in kiwifruit (actinidia chinensis cv. hayward) an experiment was carried out in citrus research institute, ramsar, iran in 2006-2007. the experiment was based on a completely random design of three replications. the treatments consisted of mesa at five rates (0, 8, 16, 24 and 32 µl/l) and storage time of five le...

Journal: :زبان شناسی و گویش های خراسان 0
رضوان متولیان نایینی علیرضا پرهام

extended abstract 1. introduction the diversity of impersonal constructions and the different approaches used in studying them have caused different and sometimes contradictory positions about their classification and the explanation of grammatical and semantic roles of their components. this article reveals the necessity of studying them with a new approach which pursues a common basis coverin...

Journal: :شیلات 0
صغری ضرغامی گروه شیلات دانشکده منابع طبیعی علیرضا میرواقفی- بیماریها گروه شیلات دانشکده منابع طبیعی حمید فرحمند گروه شیلات دانشکده منابع طبیعی محمدعلی نعمت الهی گروه شیلات دانشکده منابع طبیعی

the intensive use of antimicrobial agents worldwide for prophylactic and therapeutic purposes has been associated with increase of bacterial resistance in the exposed microbial environment. oxytetracycline is the most frequently used antibacterial in the cold water fish industry because of its broad spectrum of activity and low cost. aeromonas hydrophila and other motile aeromonads are among th...

Journal: :تحقیقات آب و خاک ایران 0
ندا یزدانی مطلق دانشجوی سابق کارشناسی ارشد، دانشکدة کشاورزی دانشگاه تبریز عادل ریحانی تبار استادیار دانشکدة کشاورزی دانشگاه تبریز نصرت اله نجفی دانشیار دانشکدة کشاورزی دانشگاه تبریز

rice (oryza sativa l.) is one of the iran's most strategic crops with water shortage as the most important abiotic stress limiting its yield. in the present research the effects of: variety, water regime, nitrogen (n) and phosphorus (p) levels on n, p and k uptake were studied under greenhouse conditions. the experiment design was a factorial one based upon a randomized complete blocks of ...

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