نتایج جستجو برای: دستگاههای تمام اتوماتیک cnc

تعداد نتایج: 49484  

2010
Chengjun Zhou Qinglin Wu Quanguo Zhang

A series of dynamic small-amplitude oscillatory shear experiments for in situ polymerization process of polyacrylamide–cellulose nanocrystal (PAM–CNC) nanocomposite hydrogels were performed to investigate the relationship between rheological properties and synthesis parameters including chemical cross-linker concentration, polymerization temperature, initiator concentration, and CNC aspect rati...

بابک قنبرزاده جلال دهقان‌نیا علی‌اکبر انتظامی محمود صوتی خیابانی نسرین جمشیدی کلجاهی

در این پژوهش، برای بهبود ویژگی­های کاربردی فیلم­های بر پایه نشاسته، ابتدا از میزان ثابت اسیدسیتریک و پلی­وینیل­الکل (PVOH) استفاده و پس از آن اثر سطوح مختلف غلظت دو نوع نانوذره نانوکریستال ­سلولز (CNC) و دی­اکسید­ تیتانیم (TiO2) به‌صورت توأم و نرم­کننده گلیسرول (GLY) بررسی شد.  آزمون گرماسنجی پویشی افتراقی (DSC) نشان می­دهد که افزودن CNC و TiO2 به‌ترتیب موجب افزایش دمای ذوب و انتقال شیشه­ای و ک...

Journal: :Work 2012
I Levchuk A Schäfer K-H Lang Hj Gebhardt A Klussmann

During the last decades, an increasing use of innovative technologies in manufacturing areas was monitored. A huge amount of physical workload was replaced by the change from conventional machine tools to computer-controlled units. CNC systems spread in current production processes. Because of this, machine operators today mostly have an observational function. This caused increasing of static ...

ژورنال: :نشریه دانشکده فنی 1999
بهزاد مشیری منصور هادی زاده

در این مقاله سعی خواهد شد که یک مدل جامع از یک سیستم انعطاف پذیر (f.m.s) به کمک شبکه پتری ارائه گردد و در ادامه به کمک الگوریتم های ژنتیکی روشی سریع برای یافتن یک فهرست بندی مناسب و بهینه ارایه گردد. در این تحقیق سعی میشود اولاً تمام نکات عملی موجود در fms نظیر ماشین های cnc ، ربات ها،حامل های بار نظیر agv ، نگهدارنده ها و همچنین مسایلی نظیر تداخل مسیر حرکت حاملها و یا تداخل حرکت ربات ها همگی د...

Journal: :IJMMME 2012
Salah Haridy Zhang Wu Amro Shafik

Computer numerical control (CNC) involves machines controlled by electronic systems designed to accept numerical data and other instructions, usually in a coded form. CNC machines are more productive than conventional equipment and consequently produce parts at less cost and higher accuracy even when the higher investment is considered. This article proposes an educational scheme for designing ...

Journal: :Development 2006
Tomoyo Sasaki Yoshihiro Ito Pablo Bringas Stanley Chou Mark M Urata Harold Slavkin Yang Chai

The murine frontal bone derives entirely from the cranial neural crest (CNC) and consists of the calvarial (lateral) aspect that covers the frontal lobe of brain and the orbital aspect that forms the roof of bony orbit. TGFbeta and FGF signaling have important regulatory roles in postnatal calvarial development. Our previous study has demonstrated that conditional inactivation of Tgfbr2 in the ...

Journal: :Development 2016
Jun Wang Yang Xiao Chih-Wei Hsu Idaliz M Martinez-Traverso Min Zhang Yan Bai Mamoru Ishii Robert E Maxson Eric N Olson Mary E Dickinson Joshua D Wythe James F Martin

The role of the Hippo signaling pathway in cranial neural crest (CNC) development is poorly understood. We used the Wnt1(Cre) and Wnt1(Cre2SOR) drivers to conditionally ablate both Yap and Taz in the CNC of mice. When using either Cre driver, Yap and Taz deficiency in the CNC resulted in enlarged, hemorrhaging branchial arch blood vessels and hydrocephalus. However, Wnt1(Cre2SOR) mutants had an...

Journal: :Endocrinologia y nutricion : organo de la Sociedad Espanola de Endocrinologia y Nutricion 2011
Eladio José Losada Grande Daniel Al Kassam Martínez Margarita González Boillos

Carney complex (CNC) is an autosomal dominantly inherited syndrome characterized by spotty skin pigmentation, cardiac and cutaneous myxoma, and endocrine overactivity. Skin pigmentation includes lentigines and blue nevi. Myxomas may occur in breast, skin and heart. Cardiac myxomas may be multiple and occur in any cardiac chamber, and are more prone to recurrence. The most common endocrine gland...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Konstantinos E Hatzistergos Lauro M Takeuchi Dieter Saur Barbara Seidler Susan M Dymecki Jia Jia Mai Ian A White Wayne Balkan Rosemeire M Kanashiro-Takeuchi Andrew V Schally Joshua M Hare

The degree to which cKit-expressing progenitors generate cardiomyocytes in the heart is controversial. Genetic fate-mapping studies suggest minimal contribution; however, whether or not minimal contribution reflects minimal cardiomyogenic capacity is unclear because the embryonic origin and role in cardiogenesis of these progenitors remain elusive. Using high-resolution genetic fate-mapping app...

Journal: :Journal of neuroscience research 2007
Michael Gray Winnie Palispis Phillip G Popovich Nico van Rooijen Ranjan Gupta

Previous work has shown that, during the early phases of chronic nerve compression (CNC) injury, axonal pathology is absent while Schwann cells undergo a dramatic process of cellular turnover with marked proliferation. It is known that macrophages may release Schwann cell mitogens, so we sought to explore the role of macrophages in CNC injury by selectively depleting the population of hematogen...

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