نتایج جستجو برای: nonlinear spectrum response

تعداد نتایج: 1383625  

Journal: :نشریه علمی - پژوهشی هیدرولوژی کاربردی 0
fatemeh shokrian sari agricultural sciences and natural resources university k. shahedi

estimate of sediment load is required in a wide spectrum of water resources engineering problems. the nonlinear nature of suspended sediment load series necessitates the utilization of nonlinear methods to simulate the suspended sediment load. in this study artificial neural networks (anns) are employed to estimate daily suspended sediment load. two different ann algorithms, multi layer percept...

In this work, the nonlinear buckling and post-buckling behavior of shallow arches made of Shape Memory Alloy (SMA) is investigated. Arches are susceptible to large deflections, due to their slenderness, especially when the external load exceeds the serviceability limit point. Beyond this, loss of stability may occur, the famous snap-through buckling. For this reason, curved beams can be used in...

2005
Dragan Vujic Sajeev John

We delineate critical issues for “controlling light with light” in photonic crystal PC waveguides coupled to Kerr-nonlinear microresonators. These arise from a fundamental trade-off between switching speed and switching intensity threshold inherent in high-quality Q-factor cavities and b the dynamical nonlinear oscillation of such cavities in response to incident light pulses. Using finite-diff...

Journal: :international journal of civil engineering 0
q. q. zhang geotechnical and structural engineering research center, sh. c. li geotechnical and structural engineering research center, f. y. liang geotechnical and structural engineering research center, m. yang professor, key laboratory of geotechnical and underground engineering (tongji university), ministry of education, shanghai, china q. zhang ph.d. candidate, geotechnical and structural engineering research center, shandong university, jinan, china

a simplified approach for nonlinear analysis of the load-displacement response of a single pile and a pile group is presented using the load-transfer approach. a hyperbolic model is used to capture the relationship between unit skin friction and pile-soil relative displacement developed at the pile-soil interface and the load-displacement relationship developed at the pile end. as to the nonlin...

A. Milany, S. Gholizadeh,

The main purpose of the present work is to investigate the impact of soil-structure interaction on performance-based design optimization of steel moment resisting frame (MRF) structures. To this end, the seismic performance of optimally designed MRFs with rigid supports is compared with that of the optimal designs with a flexible base in the context of performance-based design. Two efficient me...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1387

چکیده ندارد.

2001
Naoki Seto

Evolution of power spectrum is studied for non-Gaussian models of structure formation. We generalize the dark-matter-approach to these models and find that the evolved spectrum at weakly nonlinear regime is mainly determined by a simple integral of the dark-matter-halo mass function in this approach. We also study the change of the nonlinear spectrum within the current observational constraint ...

A KHeradmand M Nasirian N Banazadeh

Psychotic disorders have been observed in association with some autoimmune disorders. Moreover, autoimmune mechanisms have been recently considered in evaluation of schizophrenia spectrum disease managements. Vitiligo is one of the autoimmune diseases, but there is no report of vitiligo association with psychosis. We report three patients with vitiligo and schizophrenia spectrum disease that ar...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده برق و کامپیوتر 1392

سیستم های طیف گسترده(spread spectrum) امروزه به طور وسیعی مورد استفاده قرار می گیرند. این سیستم ها ابتدا توسط ارتش آمریکا و در طی جنگ جهانی دوم مورد استفاده قرار گرفت. در سیستم های طیف گسترده دنباله خطی (direct sequence spread spectrum) سیگنال داده در یک دنباله شبه نویز ضرب می شود تا پهنای باند افزایش یابد. در گیرنده نیز سیگنال دریافتی پس از دمدولاسیون در یک دنباله شبه نویز همانند دنباله موجود ...

Journal: :Optics express 2013
Jaroslaw E Prilepsky Stanislav A Derevyanko Sergei K Turitsyn

Using the integrable nonlinear Schrödinger equation (NLSE) as a channel model, we describe the application of nonlinear spectral management for effective mitigation of all nonlinear distortions induced by the fiber Kerr effect. Our approach is a modification and substantial development of the so-called "eigenvalue communication" idea first presented in A. Hasegawa, T. Nyu, J. Lightwave Technol....

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