نتایج جستجو برای: cold heading

تعداد نتایج: 112633  

Journal: :Medical Care 2009

Journal: :Vision Research 1999
A. V van den Berg

Humans perceive heading accurately when they rotate their eyes. This is remarkable, because (1) the pursuit eye movement makes the retinal flow more complicated; and (2) the eye rotation causes a continuous change of the heading direction on the retina. The first problem prevents a simple association of the centre of flow on the retina with the heading direction. To solve it, the brain needs to...

2001
Ijaz Ahmad Chaudhry Bela Lengyel

The knowledge-based system COFEX (Cold Forging Expert) has been developed to assist in the planning of the cold forging of a wide variety of tubular steel components. Following user-input of the required shape and dimensions of the finished forging, together with as many different sequences as desired, each operation is examined by the system by consulting the knowledge-base process rules and d...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

126 abstract: in this research we studied the effects of cyclic hydration and dehydration of cysts of artemia urmiana and artemia parthenogenetica on the hatching percentage, survival and growth. the experiment was carried out in 3 treatments (1-3 hydration/dehydration cycles) with 3 replicates for each treatment. later effects of cold preservation at -20°c during three time periods were ...

2011

(g) pumps incorporating measuring devices, of heading 8413; weight–operated counting and checking machinery, or separately presented weights for balances (heading 8423); lifting or handling machinery (headings 8425 to 8428); paper or paperboard cutting machines of all kinds (heading 8441); fittings for adjusting work or tools on machine tools, of heading 8466, including fittings with optical de...

2015
Rong Hu Zhen Wang Peng Wu Jun Tang Xilin Hou

In cells, calmodulin (CaM) is the most remarkable Ca transducer. BcCAMTA gene family members are calmodulin-binding transcription activators, which contain new type of sequence-specific DNA-binding domain (CG-1), an ankyrin repeats and tow IQ calmodulin-binding motifs. In our study, 8 calmodulin-binding transcription activator (CAMTA) genes were identified from non-heading Chinese cabbage (Bras...

To identify quantitative trait loci (QTLs) controlling heading date and plant height, ninety nine F13 recombinant inbred lines (RILs) derived from barley cultivars Azumamugi × Kanto Nakate Gold cross were evaluated. The field trails were conducted at randomized complete block design with two and three replications in 2004 and 2005, respectively. Significant differences and transgrassive segrega...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی مکانیک 1381

در این پایان نامه در ابتدا دلایل شکل گیری آلاینده ها در شرایط cold start و warm up و راهکارهای کاهش آنها ارائه می شود. در ادامه، بهینه سازی فرایند شکل گیری مخلوط هوا و سوخت از طریق کنترل دقیق نسبت هوا به سوخت بعنوان یکی از بهترین راهکارهای عملی کاهش آلاینده ها در شرایط cold start و warm up با جزئیات کامل مورد بررسی قرار می گیرد. مدل بدست آمده (برای موتور پیکان انژکتور)، شبیه سازی می شود و نتایج...

Journal: :تولید گیاهان زراعی 0

low temperature (lt) acclimation, phenological development and vernalization requirement are known to influence the expression of frost tolerance (ft) in winter cereals. a phenotypic study was undertaken to determine the interrelationship between developmental stages and ft in hardy winter wheat and rye cultivars acclimated under field condition in the cold and temperate regions of iran. winter...

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