نتایج جستجو برای: capacity spectrum method

تعداد نتایج: 2063409  

Doroshkevych, Kateryna , Kuzmin, Oleh , Zhyhalo, Oksana ,

Innovative capacity as a potential ability of an enterprise to innovative development is manifested in the process of formation and realization of an innovative product, which can be embodied in various forms. In the article innovation capacity is considered as a complex concept that covers the innovative output of the enterprise and the reserve for providing innovative capacity, which can make...

2002
Young-uk Chung Dong-Ho Cho

The great increase of the number of users requires efficient management of the spectrum. In hierarchical cellular systems based on CDMA, FBRA algorithm is proposed to allocate frequency spectrum more efficiently. This algorithm lends frequency spectrum of macrocell to microcells when mass hot spot occurred. We analyze the interference to signal ratio and reverse link capacity in case of using t...

Journal: :SN applied sciences 2023

Abstract Based on the coupling res model of vehicular and road, influences surface layer modulus, thickness equivalent modulus elasticity spectrum acceleration, deflection under wheels, strain at distance 0.4 m to 0.8 away from wheels are analyzed. Results show that fundamental frequency road pavement increases with growth elasticity, decreases increase thickness. Both deflections strains decre...

2013
Heena Malik Sandeep Singh Kang

Steganography is the art and science of hiding that a communication is taken place. It embeds the secret file (text, audio or image) in other carrier file. Audio information hiding has attracted more attentions recently. Spread spectrum (SS) technique has developed rapidly in this area due to the advantages of good robustness and immunity to noise attack. Spread spectrum techniques really of di...

2012
Rehan A. Khan T. Naqvi

A simplified fragility analysis of steel building frame is presented which can be used for preliminary estimate of its probability of failure. The risk analysis procedure uses the format of probabilistic Risk Analysis (PRA) and considers band limited white noise at the bed rock as the seismic input. The steel building frame is modeled as a 2D frame and Pushover analysis is then carried out to o...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1377

روش المانهای مجزا "(discrete element method)" با نام مخفف "dem" یکی از روشهای موجود برای تحلیل عددی مسائل مختلفی در زمینه ژئوتکنیک مانند پایداری شیروانی ها و بررسی جابجایی توده های سنگی نسبت به یکدیگر می باشد. (البته این روش دارای کاربردهایی در زمینه های دیگر نیز می باشد). در این پایان نامه، سعی شده است تا از این روش در مساله ظرفیت باربری پی استفاده شود. پی می تواند روی سطح افقی یک نزدیک سطح شی...

Fragility curves are very useful in quantifying the physical and economic damage of buildings that have undergone an earthquake. This paper presents the development of analytical fragility curves representative of mid-rise residential structures built with reinforced concrete, taking into account the specific structural characteristics of Algerian buildings. The derivation of the analytical fra...

2015
Wasim Arif Sanjoy Debnath

AbstractIn cognitive radio network, through efficient spectrum utilization the secondary user (SU) capacity maximization is an important work, here we optimize the secondary user capacity through threshold in the dual threshold scheme of cooperative spectrum sensing by taking the primary user( PU ) on priority as well as SU on priority in AWGN and Rician channel with the evolutionary optimizati...

2012
F. T. Foukalas P. T. Mathiopoulos G. T. Karetsos

We propose a joint optimal power allocation and sensing threshold selection for capacity maximization at the secondary user (SU) in spectrum sharing (SS) cognitive radio networks (CRNs). Hence, both optimal power allocation (OPA) and spectrum sensing (SpSe) is considered in the SS CRNs model. The obtained results show that such a joint optimal selection improves the performance of the SU by max...

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