توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Effects of Machining Parameters on Cutting Force and Surface Roughness of the Superalloy Inconel 738
نویسنده(ها): ، ، ،
اطلاعات انتشار: دومین کنفرانس بین المللی و هشتمین کنفرانس ملی مهندسی ساخت و تولید، سال
تعداد صفحات: ۷
This research represents an investigation on the effects of machining parameters such as feed rete, spindle speed and depth of cut on surface roughness and cutting force of hard–to–cut superalloy Inconel 738 in turning process. Inconel 738 has high strength at elevated temperature which makes it attractive toward various applications in aerospace industry and land–base turbines.A L32 Taguchi standard orthogonal array was used as the design of experiment (DOE). The level of importance of the machining parameters on Ra and force were determined by analysis of variance (ANOVA). Eventually the optimum of the effective parameter combinations were obtained by using the analysis of signal to noise(S\N).<\div>

۲SYNTHESIS OF 1,2,3,4–TETRAHYDROPYRIMIDIN–ONE USING N–ZRO2
نویسنده(ها): ، ، ،
اطلاعات انتشار: اولین همایش ملی تکنولوژی های نوین در شیمی و پتروشیمی، سال
تعداد صفحات: ۴
An environmentally and straightforward Biginelli based condensation reaction of different aromatic aldehydes, ethyl acetoacetate and urea utilized by nano–ZrO2 to afford 1,2,3,4–tetrahydropyrimidin–one is described. This procedure promoted under thermal conditions at 140 ºC which benefits from simplicity of work–up, low cost reagents and good to high yields<\div>

۳SYNTHESIS OF DHPMS CATALYZED BY N–ASA UNDER SOLVENT–FREE CONDITIONS
نویسنده(ها): ، ، ،
اطلاعات انتشار: اولین همایش ملی تکنولوژی های نوین در شیمی و پتروشیمی، سال
تعداد صفحات: ۴
An environmentally benign and one–pot procedure for synthesis of 3,4–dihydropyrimidin–2–(1H)–thiones (DHPMs) through a three–component condensation reaction of various aromatic aldehydes, ethyl acetoacetate, and thiourea catalyzed by nano Al2O3 (Nano–ASA) at 120 ºC, under solvent–free conditions is presented. This method provides us several remarkable advantages including short reaction times, high yields, nontoxic reagent and green work–up<\div>

۴SYNTHESIS OF 3,4–DIHYDROPYRIMIDINONE DERIVATIVES USING NANO–ZRO2
نویسنده(ها): ، ، ،
اطلاعات انتشار: اولین همایش ملی تکنولوژی های نوین در شیمی و پتروشیمی، سال
تعداد صفحات: ۴
An efficient protocol has been developed for the Biginelli reaction using Nano–ZrO2 as a nano acid catalyst by a three–component condensation of ß–diketones, aromatic aldehydes, and urea to give corresponding 3, 4–dihydropyrimidin–2(1H)–ones<\div>

۵DIHYDROPYRIMIDIN–2(1H)–ONES CATALYZED BY NASA
نویسنده(ها): ، ، ،
اطلاعات انتشار: اولین همایش ملی تکنولوژی های نوین در شیمی و پتروشیمی، سال
تعداد صفحات: ۴
A new and efficient synthesis of dihydropyrimidinone drivatives from the three–component condensation reaction of urea, ethylacetoacetate and aromatic aldehydes using nano alumina sulfouric acid (NASA) as solid acid catalyst. The features of this procedure are mild reaction conditions, good to excellent yields, short reaction times and operational simplicity.<\div>
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