نتایج جستجو برای: astm a516

تعداد نتایج: 3399  

2011
F. Mustapha N. W. Sim A. Shahrjerdi

In this paper, a finite element modeling via ABAQUS/Explicit simulation on a novel fabrication miniature composite fuselage structure is presented. The fuselage structure is modeled as a continuum composite layup that consisted of a woven C-glass fiber/epoxy 200 g/m 2 composite laminated [908] with the orthotropic elastic material properties and adhesively bonded butt joint. The adhesively bond...

2005
ChunXiao Wang

An Agilent Simulated Distillation (SimDis) system is described for characterizing petroleum fractions for quality control and monitoring of refinery feedstocks and products. The system uses a 6890N gas chromatograph (GC) equipped with a high temperature programmable temperature vaporizer (HT PTV) inlet designed specifically for simulated distillation analysis. A SimDis software program that cou...

2008
ChunXiao Wang

A fast multielement simulated distillation method (SimDis) based on Low Thermal Mass (LTM) column technology is described. The LTM system technology using resistive heating allows rapid temperature programming with extremely fast column cooldown. Significantly shortened analytical cycle times as compared to conventional air bath GC ovens are achieved. The method combines hydrocarbon SimDis with...

Journal: :Nihon Hoshasen Gijutsu Gakkai zasshi 2008
Yuta Morishita Tosiaki Miyati Jousei Ueda Mitsuru Shimizu Takashi Hamaguchi Yasuhiro Fujiwara Hiroyuki Hayashi

The purpose of our study was to assess the mechanical effect on tattoo seals and eye makeup caused by a spatial magnetic gradient in the magnetic resonance imaging (MRI) system. Seven kinds of tattoo seals and three kinds of eye makeup, i.e., mascara, eye shadow, and eyeliner were used. On a 3.0-Tesla MRI, we determined these deflection angles according to a method established by the American S...

Journal: :JALA: Journal of the Association for Laboratory Automation 1999

ژورنال: :نشریه علمی-پژوهشی مهندسی معدن 2014
فرامرز دولتی سعید یوسفی منصور ضیائی محمد کاراموزیان عصمت اسماعیل زاده

در ارزیابی اثرات زیست محیطی زهاب اسیدی معدن، تعیین دقیق میزان پیریت باقی مانده و کانی های هیدروکسی سولفاته حاصل از اکسایش پیریت بسیار تعیین کننده است. روش استاندارد astm-d2492 یک روش آزمایشگاهی برای تعیین دقیق این کانی ها در باطله های زغال است که با توجه به تفاوت کانی شناسی باطله های زغال و مس پورفیری، برای کاربردی شدن در باطله های مس پورفیری باید اصلاح شود. مهمترین عامل خطا در این آزمایش برای ...

Journal: :Journal of forensic sciences 2005
Sharee Booke Wells

Vinyl flooring manufacturers use plasticizers to decrease the viscosity and increase the pliability of vinyl. Several ignitable liquid plasticizers used in the manufacture of vinyl flooring were identified and investigated in this study. Twenty-nine collections from five major vinyl manufacturers, a total of 72 samples, were analyzed using passive headspace concentration in accordance with the ...

Journal: :The Analyst 2012
Jinmyoung Joo Hyejung Seo Changho Chun Kunwoo Han Hwangyo Jung Sungjee Kim Sangmin Jeon

A dynamic light scattering (DLS) method was adopted for measuring the corrosion of iron nanoparticles. The average diameter of the nanoparticles in a sodium chloride suspension increased linearly with time as iron oxide layers formed around the nanoparticles. The nanoparticle corrosion rate determined by DLS was found to be almost identical to the value obtained by conventional immersion tests ...

2003
Richard W. Bukowski

One of the areas in which fire hazard assessment techniques have been applied within regulation is for transportation vehicles. In particular, commercial aviation and passenger rail have utilized fire hazard assessment as a means to achieve safety goals well before these techniques became common in buildings. This chapter will review the methods employed and the recent evolution of predictive t...

2005
Lance R. Lewand

Corrosive sulfur and the effect that it has in transformer systems can be significant. The extent of the corrosion damage caused by sulfur, if left unchecked, can be so severe as to cause failure of the apparatus. The problems with corrosive sulfur have been recognized for quite some time. As early as 1948, F.M. Clark and E.L. Raab [1] issued a report on the subject for method development withi...

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