نتایج جستجو برای: ریاضی decomposition

تعداد نتایج: 111440  

E. Ayoman G. Hossini N. Haghighi

In this research, CuO spherical-like nanoparticles were synthesized using the planetary ball mill method. The structure, particle size and morphology of the resulting CuO nanoparticles were characterized by XRD (X-ray diffraction), SEM (scanning electron microscopy) and SAXS (small-angle X-ray scattering) methods. The results of this investigation showed ...

2011
S. K. Nayar K. Ikeuchi

(a) (b) Figure 8: The nal set of directions from that covers G S in thick gray lines. Two views are provided with (a) presents the regular view of Figures 5 to 7 and (b) shows the entire Gauss map. See also Figure 1. (a) (b) Figure 6: The boundary and central silhouettes of G S in thick dark gray lines is projected onto the plane z = 1 in thick light gray lines, in (a). In (b), The convex hull ...

ژورنال: :روانشناسی معاصر 0
مسعود کبیری masoud kabiri institute for educational researchپژوهشگاه آموزش و پرورش علیرضا کیامنش alireza kiamanesh kharazmi universityدانشگاه خوارزمی الهه حجازی elahe hejazi university of tehranدانشگاه تهران

در این مطالعه اهمیت خودکارآمدی در نظریه شناختی ـ اجتماعی و نقش آن به همراه نگرش ریاضی، اضطراب ریاضی و پیشرفت قبلی ریاضی در پیشرفت ریاضی از طریق تحلیل مسیر مورد بررسی گرفته است. برای این کار 366 دانش آموز کلاس سوم راهنمایی مورد مطالعه قرار گرفتند. نتایج مطالعه نشان داد که عملکرد قبلی در ریاضی بالاترین نقش و پس از آن خودکارآمدی ریاضی بالاترین نقش را در پیشرفت ریاضی دارد. نقش واسطه ای خودکارآمدی ر...

A. R. Vahidi, GH. Asadi Cordshooli Z. Azimzadeh

In this paper, we present a comparative study between the Adomian decomposition method and two classical well-known Runge-Kutta and central difference methods for the solution of damped forced oscillator problem. We show that the Adomian decomposition method for this problem gives more accurate approximations relative to other numerical methods and is easier to apply. 

This paper has been utilizing the simultaneous ThermoGravimetric analysis and Differential Scanning Calorimetry (TG–DSC) to investigate the thermal decomposition of magnesium-sodium nitrate pyrotechnic composition based HTPB resin. The thermal behaviors of different samples with various fuel-oxidizer ratio contents were determined. Decomposition kinetic was investigated by evaluating the in...

Here, Adomian decomposition method has been used for finding approximateand numerical solutions of nonlinear differential difference equations arising inmathematical physics. Two models of special interest in physics, namely, theHybrid nonlinear differential difference equation and Relativistic Toda couplednonlinear differential-difference equation are chosen to illustrate the validity andthe g...

Journal: :international journal of environmental research 0
l. buzzigoli dipartimento di statistica “g. parenti”, university of firenze, italy a. viviani dipartimento di statistica “g. parenti”, university of firenze, italy

the paper presents an analysis of both energy intensity and energy demand for the italianindustrial sector. the aim of the paper is twofold: making a decomposition of energy intensity at the aggregate level and modeling energy demand at the firm level. the decomposition of energy intensity shows different patterns for the different sub-sectors in the period of interest. in the micro approach, p...

A. Seliga

In this contribution we define a new class of non-linear integrals based on decomposition integrals. These integrals are motivated by greediness of many real-life situations. Another view on this new class of integrals is that it is a generalization of both the Shilkret and PAN integrals. Moreover, it can be seen as an iterated Shilkret integral. Also, an example in time-series analysis is prov...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی - دانشکده علوم انسانی 1394

هدف این پژوهش بررسی تاثیر آموزش ریاضی مبتنی بر الگوی e 5 بر توانایی شناختی ریاضی دانش آموزان دختر پایه هشتم می باشد. روش تحقیق در این پژوهش نیمه آزمایشی از نوع پیش آزمون - پس آزمون با گروه گواه می باشد. جامعه آماری این پژوهش، شامل کلیه دانش آموزان دختر پایه هشتم نسیم شهر در سال تحصیلی 94-1393 می باشد. حجم نمونه متشکل از 58 نفر دانش آموز دختر پایه ی هشتم می باشد که 30نفر از آنها گروه گواه و 28 ن...

Journal: :iranian journal of mathematical chemistry 2015
i. gutman

the topological indices, defined as the sum of contributions of all pairs of vertices (among which are the wiener, harary, hyper–wiener indices, degree distance, and many others), are expressed in terms of contributions of edges and pairs of edges.

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