نتایج جستجو برای: annealing time

تعداد نتایج: 1913073  

2014
Azhang Hamlekhan Arman Butt Sweetu Patel Dmitry Royhman Christos Takoudis Cortino Sukotjo Judy Yuan Gregory Jursich Mathew T. Mathew William Hendrickson Amarjit Virdi Tolou Shokuhfar

The primary objective of this study was to fabricate a TiO2 nanotubular surface, which could maintain hydrophilicity over time (resist aging). In order to achieve non-aging hydrophilic surfaces, anodization and annealing conditions were optimized. This is the first study to show that anodization and annealing condition affect the stability of surface hydrophilicity. Our results indicate that ma...

Journal: :international journal of iron & steel society of iran 2015
a. ghatei kalashami a. kermanpur a. najafizadeh y. mazaheri

an ultrafine grained dual phase (ufg dp) steel containing niobium was produced by a new routeutilizing simple cold-rolling and subsequent intercritical annealing of ferrite/martensite duplex startingstructures. the effects of intercritical holding time on the microstructural evolutions and mechanicalproperties were studied. the results showed that increasing intercritical holding time enhnaced ...

2014
Christian Heyn Sandra Schnüll David E Jesson Wolfgang Hansen

We describe a method to control the shape of nanoholes in GaAs (001) which combines the technique of local droplet etching using Ga droplets with long-time thermal annealing. The cone-like shape of inverted nanoholes formed by droplet etching is transformed during long-time annealing into widened holes with flat bottoms and reduced depth. This is qualitatively understood using a simplified mode...

In this work, nanocrystalline Fe85Si10Ni5 soft magnetic powders were prepared by mechanical alloying and subsequent annealing to reduce the internal stresses and lattice strains. The powders were mixed with phenolic resin and warm pressed to produce nanostructured soft magnetic composites. The effect of annealing time and temperature on the crystalline structure, microstructure and magnetic pro...

زمانی, سعیده, زرگرشوشتری, مرتضی , موسوی قهفرخی, سیدابراهیم ,

In this study, the effect of Ba substitution for Sr in the Bi-Pb-Sr-Ca-Cu-O (BPSCCO) system was investigated. The Bi1.6Pb0.4Sr2-xBaxCa2Cu3Oy superconductor with   0.0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3 at annealing times of 16, 32, 48 and 64 hour was made by the sol-gel method. In order to study the microstructure of samples, SEM images and X-ray diffraction (XRD) was performed. The crystal la...

2013
Young-Woong Ko DongHoi Kim Minyeong Jeong Wooram Jeon Saangyong Uhmn Jin Kim

The simulated annealing was perceived as a useful method for many intractable problems. However, it needs additional strategies to cope with time complexity due to an initial state and search space reduction. In this work, we suggested an efficient transition rule and applied it to a nurse scheduling problem. It uses a cost matrix to reduce a set of candidates, which results in performance impr...

2011
Wonseok Hwang Véronique Arluison Sungchul Hohng

Hfq is a key regulator involved in multiple aspects of stress tolerance and virulence of bacteria. There has been an intriguing question as to how this RNA chaperone achieves two completely opposite functions--annealing and unwinding--for different RNA substrates. To address this question, we studied the Hfq-mediated interaction of fragments of a non-coding RNA, DsrA, with its mRNA target rpoS ...

1994
G. B. Sorkin Albert Tsao

12 schedules may be viewed as trading oo between reachability among solutions (high T) and a bias to lower-cost solutions (low T). The WYA criterion forces the low-cost bias to dominate at the end of the run, while the BSF criterion may allow reachability to take precedence. It is therefore not surprising that BSF-optimal schedules may actually be \warming" even at the end of the annealing exec...

Journal: :journal of ultrafine grained and nanostructured materials 2012
matthias militzer hamid azizi-alizamini vishnu charan sangem

this paper provides an overview on obtaining low-carbon ultra-fine grained dual-phase steels through rapid intercritical annealing of cold-rolled sheet as improved materials for automotive applications. a laboratory processing route was designed that involves cold-rolling of a tempered martensite structure followed by a second tempering step to produce a fine grained aggregate of ferrite and ca...

Journal: :Journal of Systems Architecture 2007
Heikki Orsila Tero Kangas Erno Salminen Timo Hämäläinen Marko Hännikäinen

Mapping of applications on a Multiprocessor System-on-Chip (MP-SoC) is a crucial step to optimize performance, energy and memory constraints at the same time. The problem is formulated as finding solutions to a cost function of the algorithm performing mapping and scheduling under strict constraints. Our solution is based on simultaneous optimization of execution time and memory consumption whe...

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