نتایج جستجو برای: فرز cnc چهار محور

تعداد نتایج: 79776  

2014
Wenbang Wei Wei Song Shuangbao Zhang

Hydroxyapatite/poly(vinyl alcohol) (Hap/PVA) composites have been proposed as a promising biomaterial for use in articular cartilage repair. In this study, HAp/PVA composite gels reinforced with cellulose nanocrystals (CNC) were prepared using the freeze/thaw method. The influence of CNC as a reinforcement on the structure of composite gels was investigated via Fourier transform infrared spectr...

Journal: :Biomacromolecules 2015
Farhan Ansari Michaela Salajková Qi Zhou Lars A Berglund

In this work, the problem to disperse cellulose nanocrystals (CNC) in hydrophobic polymer matrices has been addressed through application of an environmentally friendly chemical modification approach inspired by clay chemistry. The objective is to compare the effects of unmodified CNC and modified CNC (modCNC) reinforcement, where degree of CNC dispersion is of interest. Hydrophobic functionali...

2008
Y. C. Kao H. Y. Cheng Y. C. Chen

This paper describes the development of a virtual CNC controller. Controller is the major driver for a CNC machine. Similarly, virtual controller is the key driving component for a virtual CNC, which is a three-dimensional digitized physical CNC. A virtual CNC can exist in every PC serving as the complementary safer counterpart in lecturing and learning the hand on operation of expensive machin...

Journal: :Orphanet Journal of Rare Diseases 2006
Jérôme Bertherat

The Carney complex (CNC) is a dominantly inherited syndrome characterized by spotty skin pigmentation, endocrine overactivity and myxomas. Skin pigmentation anomalies include lentigines and blue naevi. The most common endocrine gland manifestations are acromegaly, thyroid and testicular tumors, and adrenocorticotropic hormone (ACTH)-independent Cushing's syndrome due to primary pigmented nodula...

2017
Ketan Mathavan Vikram Khedgikar Vanessa Bartolo Dominique Alfandari

During development, a multi-potent group of cells known as the cranial neural crest (CNC) migrate to form craniofacial structures. Proper migration of these cells requires proteolysis of cell adhesion molecules, such as cadherins. In Xenopus laevis, preventing extracellular cleavage of cadherin-11 impairs CNC migration. However, overexpression of the soluble cleavage product (EC1-3) is capable ...

Journal: :Nature genetics 2000
L S Kirschner J A Carney S D Pack S E Taymans C Giatzakis Y S Cho Y S Cho-Chung C A Stratakis

Carney complex (CNC) is a multiple neoplasia syndrome characterized by spotty skin pigmentation, cardiac and other myxomas, endocrine tumours and psammomatous melanotic schwannomas. CNC is inherited as an autosomal dominant trait and the genes responsible have been mapped to 2p16 and 17q22-24 (refs 6, 7). Because of its similarities to the McCune-Albright syndrome and other features, such as pa...

Journal: :ACS nano 2010
Wen-Chih Liu Huang-Kai Lin Yu-Liang Chen Chi-Young Lee Hsin-Tien Chiu

Growth of amorphous carbon nanocoil (CNC) from acetylene on Si substrates was achieved by using nanosized Ag and K as the catalysts. The deposition of CNC was carried out inside a hot-wall reactor at 723 K using H2 as the carrier gas. Based on the observed results, we propose a cooperative bimetal catalyst enhanced vapor-liquid-solid (VLS) growth mechanism to rationalize the CNC growth. In the ...

2012
Randal Mckissack

The Intel Corporation is developing a new parallel software and compiler called Concurrent Collections (CnC) to make programming in parallel easier for the user. CnC provides a system of collections comprised of steps, items, and tags. A CnC user specifies their algorithm in a graph representation using these constructs. Using this graph of dependencies, CnC automatically identifies paralleliza...

2008
Y. X. Yao

PC-based software computer numerical control (CNC) system is the ideal for open CNC system, but there are some problems about the current open CNC system, such as the limitation of interpolation cycle, demanding on high-speed and high precision machining and the limitation of operation system (OS). So advances a novel PC-based architecture for compiled-type software CNC system, in the architect...

ژورنال: :مهندسی مکانیک مدرس 2014
عباس پاک حامد دیلمی عضدی مهدی محمودی

فرآیند شکل دهی افزایشی یکی از روش های شکل دهی است که به دلیل عدم نیاز به قالب خاص برای تولید قطعات با تعداد کم و نمونه سازی سریع مورد توجه قرار گرفته و تلاش های زیادی برای بهبود آن انجام شده ‏است. یکی از روش های نوین بهبود فرآیندهای شکل دهی استفاده از نوسانات مافوق صوت (آلتراسونیک) است. هدف از این مقاله بررسی اثر اعمال نوسان آلتراسونیک به ابزار در فرآیند شکل دهی افزایشی است. برای این منظور ابتد...

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