نتایج جستجو برای: isoconversional methods
تعداد نتایج: 1874444 فیلتر نتایج به سال:
To ascertain the potential of various leguminous biomass such as L. leucocephala, C. proliferus, P. alba and S. sesban, both energetic a source high added value products, pyrolytic behaviour was studied at different heating rates by using analytical method thermogravimetric (TG), isoconversional Kissinger-Akahira-Sunose (KAS), determination some thermodynamic parameters pyrolysis-gas chromatogr...
insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
چکیده : تحقیق حاضر به منظور مقایسه دو روش تدریس انتزاعی و تدریس در متن بر یادگیری دستور زبان ایتالیاییِ زبان آموزان ترم 1 مدرسه ایتالیایی تهران در تابستان 89 صورت گرفت. روش تحقیق آزمایشی بوده و پژوهش بر 30 نفر از زبان آموزان مدرسه ایتالیایی تهران که بصورت تصادفی به 2 گروه جایگزین شدند صورت گرفت. ابزار تحقیق آزمون 30 سوالی تستی از بانک سوالات استاندارد شده بود که به تصادف انتخاب شده بودند.روشهای...
Article history: Received 20 November 2012 Received in revised form 7 June 2013 Accepted 17 June 2013 Available online 1 July 2013
در سالهای اخیر، ایروژلهای کربنی توجه ویژهای را به خود اختصاص دادهاند. این دسته مواد برپایه کربن در دمای نسبتاً کم (حدود 400 درجه سلسیوس) در معرض اکسیژن اکسید میشوند. توسعههای انجام شده در زمینه فناوری ذخیره انرژی، لزوم بررسی رفتار ایروژلهای کربنی در دماهای زیاد را بهعنوان انتخابی برای این سامانهها آشکار میکند. هدف این مقاله، تحلیل سینتیکی اکسایش ایروژل کربنی با روش سینتیکی غیر...
This work investigates the potentialities of thermal analysis (TA) coupled with mass spectrometry (MS) technique by studying decomposition calcium oxalate monohydrate (CaC2O4·H2O). The aim this is twofold: to demonstrate, at first, efficacy coupling gravimetric (TG)-MS experimental approach check presence intermediate reactions beyond conventional three-step decomposition: dehydration, decarbon...
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The strict-contractivity and the convergence of General Linear Methods on the classes of strictly dissipative and dissipative differential systems regarding some inner product are analyzed. New convergence and contractivity results of the methods on semi-infinite intervals are provided for the case of strictly dissipative problems. Some applications of the main results to the class of Runge-Kut...
Article history: Received 11 August 2013 Received in revised form 29 December 2014 Accepted 12 January 2015 Available online 16 January 2015
this study aimed at examining the effects of iranian efl learners’ anxiety, ambiguity tolerance, and gender on their preferences for corrective feedback (cf, henceforth). the effects were sought with regard to the necessity, frequency, and timing of cf, types of errors that need to be treated, types of cf, and choice of correctors. seventy-five iranian efl students, twenty-eight males and forty...
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