نتایج جستجو برای: board density

تعداد نتایج: 465590  

Journal: :journal of agricultural science and technology 2013
a. enayati f. eslah e. farhid

the application of stepwise multivariate-linear regression models for determination of particleboard properties based on structural factors was studied. poplar (populus alba), beech (fagus orientaleis) and hornbeam wood (carpinus betulus) with dry density of 460, 630 and 790 kg/m3,respectively, were used as raw materials. three levels of boards target density (520, 620 and 720 kg m-3) and urea ...

Journal: :پژوهش های علوم و فناوری چوب و جنگل 0

particle size, board density and adhesive content are the most important factors, influencing on physical and mechanical properties of particleboard. in this study the effects of density, adhesive content and particle size on withdrawal strength of particleboard made from populus (populus alba) particles have been studied. three levels of density including 0.65, 0.7, and 0.75 g/cm3, three level...

Journal: :journal of agricultural science and technology 2012
f. eslah a. a. enayati m. tajvidi m. m. faezipour

the aim of this study was to explore the minimum amount of urea formaldehyde (uf) resin content and optimum particleboard density while maintaining boards’ quality to reduce production costs. board density at three levels (520, 620 and 720 kg m-3) and resin content (6, 7 and 8%) were variable parameters. stepwise multivariate linear regression models were used to evaluate the influence of board...

ژورنال: علوم آب و خاک 2002
علیرضا هادیان, , حسین سیدالاسلامی, , عبدالمجید رضایی, ,

Color sticky board traps are used in pest management for capture of adult insect, to estimate and predict population densities in later stages. Yellow sticky board traps showed high attraction for pistachio psylla. It is important to study these relationships for the right placement of traps. For each of three repetition in one year, four pistachio trees were selected randomly in one orchard. E...

علیرضا هادیان, , حسین سیدالاسلامی, , عبدالمجید رضایی, ,

Color sticky board traps are used in pest management for capture of adult insect, to estimate and predict population densities in later stages. Yellow sticky board traps showed high attraction for pistachio psylla. It is important to study these relationships for the right placement of traps. For each of three repetition in one year, four pistachio trees were selected randomly in one orchard. E...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده پزشکی 1391

هدف: تحقیقات بر روی tilt board که اختصاصاً جهت تمرینات تعادلی طراحی گشته بسیار محدود است. هدف ما در این مطالعه بررسی اثر تمرین با tilt board بر مولفه های استاتیک و دینامیک تعادل بعد سکته بود. روش: در این مطالعه ?? بیمار همی پلژی شرکت داشتند که بطور تصادفی به دو گروه مداخله و کنترل دسته بندی شدند. بیماران با استفاده از آزمون های کلینیکی، دستگاه force plate و biodex قبل و بعد درمان مورد ارزیابی ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم بهزیستی و توانبخشی 1377

105 دانشجو شامل 50 دختر و 55 پسر با دامنه سنی 18 تا 35 سال (30/3+-88/21) در این تحقیق شرکت کردند. هدف از این تحقیق عبارت بود از: الف) تعیین هنجارهای سه تست بالینی واکنش تعادلی شامل ‏‎tilt board tip (tbt)‎‏ و ‏‎flat board reach (fbr)‎‏ و ‏‎tilt board reach (tbr)‎‏ ب) مقایسه واکنشهای تعادلی در دختران و پسران این سه تست بر روی آزمودنیهای انجام گرفت و چهار زاویه زیر اندازه گرفته شد: زاویه بین تخته ...

Journal: :Journal of the Surface Finishing Society of Japan 1989

2015
Lili Huang Ping Xia Yamei Liu Yao Fu Yuanye Jiang Shengquan Liu Xiulun Wang

This study investigated the glueless preparation of biomass board using rape straw on a laboratory scale. The board-making process was broken down into four steps: soaking, refining, shape recovery, and hotpressing. To observe the effect of pressure during the hot-press stage on the strength of the bio-board, five panels were manufactured at various pressures. Moreover, density functional theor...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید