نتایج جستجو برای: w a t e r a n d f o a m a r e t h e m o s t c r i t i c a l v a r i a b l e s f o r t h e c o n s t r a i n t b l o c k s w e r e b u i l t a n d c o m p r e s s i v e s t r e n g t h w a s o b t a i n e d t h a t w a s c o n s i s t e n t w i t h t h e c a l c u l a t e d r e s u l t
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بیشتر مدل های بررسی شده در مسئله ی مسیریابی وسایل حمل و نقل باهدف کاهش مسافت کل یا تعداد وسایل انجام شده است، حال آن که درعمل نحوه ی تأمین وسایل اثر قابل توجهی در هزینه ها و همچنین نحوه ی طراحی مسیرها دارد. در مقاله ی حاضر با در نظرگرفتن حالت خرید یا اجاره ی وسایل نقلیه، مدل این مسئله توسعه داده شده است، چرا که تصمیم بر اجاره یا خرید وسایل نقلیه بر نحوه ی شکل گیری مسیرها اثرگذار است. از آنجا که...
موفقیت نسبی و گسترش جهانی روش b o t پانویس{b u i l d o p e r a t e t r a n s f e r (b o t)}، موجب استقبال چشمگیر کشورهای درحال توسعه برای اجرای پروژه هایی شده است که دچار کمبود منابع یا عدم دسترسی به فناوری مورد نیاز هستند. تجارب حاضر نشان می دهند که لزوماً نمی توان هر پروژه یی را با این روش اجرا کرد. لذا ارائه ی چارچوب و مدلی که در نقطه ی آغازین پروژه قابلیت اجرای آن را به روش b o t ارزیابی کند...
shortage of irrigation water, being a crucial problem in arid and semiarid regions, makes it necessary to use treated wastewater in agriculture. a field experiment was conducted to investigate the effect of treated municipal wastewater (tmw) on the yield and fiber quality of cotton (gossypium hirsutum l.) (mehr variety). treated municipal wastewater was supplied from shahrake ghods sewage treat...
nitrogen forms exert significant effects on physiological and morphological characteristics of plant. in this study, the effects of ammonium, nitrate, and ammonium-nitrate on pepper plants were investigated in soil culture, as well as in solution culture. in the soil culture, 3, 4-dimethylpyrazole phosphate (dmpp) was used as a standard nitrification inhibitor to guarantee the presence of ammon...
the present paper is concerned with the structural characteristics and contents of the russian resistance poets from the outset up to the end of the world war ii, 1941-1945. regarding the linguistic and literary structures of the resistance poetry of this period, such features as changes in the lexical structure of poems, outspokenness, proximity of poetry to slogans can be easily observed. sem...
in this research, moisture sorptions of sayer date were determined at 20, 30, 40 and 60°c, using the standard static gravimetric method developed by the european cooperation project cost 90. several mathematical models, namely gab, bet, iglesias & chirif and halsey were employed to fit the experimental data through non-linear regression. results indicate that equilibrium moisture content increa...
activities of thirty bacterial strains obtained from plants rhizosphere in different areas against phytophthora drechsleri were assessed through in vitro and greenhouse experiments. dual culture and extracellular metabolites tests were used in in vitro assays. the bacterial strains inhibited growth of p. drechsleri, the highest inhibition zones was belonged to t17-4 strain with 61.904% in dual ...
in order to achieve a sustainable management and development of natural resources, a set of technical, eco-social, environmental and ecological criteria must be considered in the planning process. an appropriate model is therefore needed to address all the criteria mentioned above, in the decision making process and finally provide a reliable result. in the last few years, analytical hierarchic...
the aim of this study was to investigate the barrier properties of cellulose nanocrystals-pvananocomposites. nanocomposite films with different filler loading levels (3, 6, 9 and 12% by wt) weredeveloped by solvent casting method. the effect of cellulose nanocrystals on the barrier properties ofthe nanocomposites was studied. to this end, moisture absorption, water vapor permeability (wvp),oxyg...
trehalose is an important disaccharide signal metabolite in plants which is involved in various aspects of plant function such as response to stress, photosynthesis and carbon allocation and partitioning. a mutant of arabidopsis lacking trehalose-6-phosphate synthase activity (tps1) accumulates ascorbate. exogenous ascorbate application ameliorates trehalose induced growth inhibition of wild ty...
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