نتایج جستجو برای: stability study

تعداد نتایج: 4195071  

پایان نامه :0 1374

the present study investigated the effect of the two vocabulary teaching techniques in est, namely the use of translation and the use of visual aids as two separate vocabulary teaching techniques. to answer the question of the study, a pretest (michigan test) was administered to the 58 randomly selected est students at khajeh nasiredin tusi university, faculty of mechanics. after the homogeneit...

Journal: :SIAM J. Math. Analysis 2000
Hal L. Smith Xiao-Qiang Zhao

The existence and comparison theorem of solutions is first established for the quasimonotone delayed reaction-diffusion equations on R by appealing to the theory of abstract functional differential equations. The global asymptotic stability, Liapunov stability and uniqueness of traveling wave solutions are then proved by the elementary superand sub-solution comparison and squeezing methods. Sup...

2010
Markus Prior

Some people are more politically interested than others, but political scientists do not know how stable these differences are and why they occur. This paper examines stability in political interest. Eleven different panel surveys taken in four different countries over 40 years are used to measure stability. Several studies include a much larger number of interview waves—up to 23—than commonly ...

Journal: :SIAM Review 1994
Andrew M. Stuart A. R. Humphries

Roghieh Nooripour, Seyed Abbas Tavalaei Shervin Assari Vahid Tavalaei

Background: Hospitalization compared to outpatient care leads to better diagnosis. Stability of diagnosis varies among different psychiatric disorders and is associated with some demographic and mental health variables. Objective: The current study evaluated the stability of diagnosis in Baqiyatallah Hospital Psychiatric Ward.  Methods:</str...

Journal: :physical chemistry research 0
roghayeh roghayeh majdan‒cegincara department of chemistry, tabriz branch, islamic azad university, tabriz, iran rahim ghadari computational chemistry laboratory, department of organic and biochemistry, faculty of chemistry, university of tabriz, 5166616471 tabriz, iran rahim hosseinzadeh-khanmiri department of chemistry, tabriz branch, islamic azad university, tabriz, iran

the conformational analysis of the organic compounds specially the biologically active natural products has attracted the consideration of different research groups. therefore, in the present study the mp2/6-311+g(d,p)//b3lyp/6-311+g(d,p) level of theory was used to study the conformations of dapdiamide d. the identity of interactions in selected conformers was studied using atom in molecule ap...

Journal: :بوم شناسی کشاورزی 0
مهدی نصیری محلاتی علیرضا کوچکی

during the last few decades cereals yield have increased drastically at the national level however, information about yield stability and its resistance to annual environmental variability are scare. in this study long term stability of grin yield of wheat, barley, rice, corn and overall cereals in iran were evaluated during a 40-year period (1971-2011). stability analysis was conducted using t...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده مهندسی معدن 1393

در این تحقیق شبکه عصبی مصنوعی برای پیش بینی مقادیر ضریب اطمینان و فاکتور ایمنی بحرانی سدهای خاکی ناهمگن ضمن در نظر گرفتن تاثیر نیروی اینرسی زلزله ارائه شده است. ورودی های مدل شامل ارتفاع سد و زاویه شیب بالا دست، ضریب زلزله، ارتفاع آب، پارامترهای مقاومتی هسته و پوسته و خروجی های آن شامل ضریب اطمینان می شود. مهمترین پارامتر مورد نظر در تحلیل پایداری شیب، بدست آوردن فاکتور ایمنی است. در این تحقیق ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...

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