نتایج جستجو برای: threshold guard channels

تعداد نتایج: 264618  

Journal: :Computers & Electrical Engineering 2011
Hamid Beigy Mohammad Reza Meybodi

In this paper, we first propose two learning automata based decentralized dynamic guard channel algorithms for cellular mobile networks. These algorithms use learning automata to adjust the number of guard channels to be assigned to cells of network. Then, we introduce a new model for nonstationary environments under which the proposed algorithms work and study their steady state behavior when ...

2006
Majid Farahmand Vahid Zargari

In this paper, the transmission of an orthogonal frequency division multiplexed (OFDM) signal over channel with time varying frequency has been considered, selective fading and additive white Gaussian noise (AWGN). Due to channel dispersion, intersymbol and intercarrier Interference will occur at the receiver. To reduce this interference, a guard time is added as a cyclic prefix (CP), or traili...

2016
Liina Jakobson Lauri Vaahtera Kadri Tõldsepp Maris Nuhkat Cun Wang Yuh-Shuh Wang Hanna Hõrak Ervin Valk Priit Pechter Yana Sindarovska Jing Tang Chuanlei Xiao Yang Xu Ulvi Gerst Talas Alfonso T. García-Sosa Saijaliisa Kangasjärvi Uko Maran Maido Remm M. Rob G. Roelfsema Honghong Hu Jaakko Kangasjärvi Mart Loog Julian I. Schroeder Hannes Kollist Mikael Brosché

Plant gas exchange is regulated by guard cells that form stomatal pores. Stomatal adjustments are crucial for plant survival; they regulate uptake of CO2 for photosynthesis, loss of water, and entrance of air pollutants such as ozone. We mapped ozone hypersensitivity, more open stomata, and stomatal CO2-insensitivity phenotypes of the Arabidopsis thaliana accession Cvi-0 to a single amino acid ...

2011
Hamid Beigy M. R. Meybodi

In this paper, we first propose two learning automata based decentralized dynamic guard channel algorithms for cellular mobile networks. These algorithms use learning automata to adjust the number of guard channels to be assigned to cells of network. Then, we introduce a new model for nonstationary environments under which the proposed algorithms work and study their steady state behavior when ...

2002
Sundus Mahmod Harsha Sirisena Krzysztof Pawlikowski

Call Admission Control (CAC) policies in mobile cellular wireless networks give priority to handoff requests over new call requests. In the guard channel policy, an integer number of channels are reserved for handoff calls, while the fractional guard channel policy rejects new calls with a probability that varies with the current channel occupancy. The effect of reservations on new and handoff ...

M. Kavoosi Kalashami, M.S. Allahyari P. Khaligh Khiyavi

The Iranian poultry sector has experienced many significant structural changes in recent years. Such changes may have influenced price dynamics and transmission of shocks through marketing channels especially on retail markets. This paper investigate price transmission, threshold behavior and asymmetric adjustment in poultry sector of Ardebil (AR), east Azerbaijan (EA) and west Azerbaijan (WA) ...

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