Báo cáo hóa học: " Delay-throughput analysis of multi-channel MAC protocols in ad hoc networks" ppt

... mechanism in joint leasing and sensing-based CRNs. Keywords: cognitive radio networks, joint leasing and sensing, non-preemptive mechanism, QoS tradeoff 1. Introduction Cognitive radio (CR) has ... d-form solutions of steady-state probab ilities in the Markov chain. The Markov chain can be broken down into a hierarchy of groups of a ggregate states. Each group of states comprises...

Ngày tải lên: 20/06/2014, 22:20

... characteristics of multi-channel MAC protocols have not been studied yet in case of Poisson arrivals and infinite number of users. Contention-based multi-channel MAC protocols designed for ad hoc netwo ... probabilities for MMAC during infinite ATIM windows will be deduced. Naturally, the average idle time of MMAC is equal to the average time of G-McMAC given in...

Ngày tải lên: 20/06/2014, 22:20

... impacts of CFO in coordinated schemes are hence worse than for point-to-point communications. Because the frequency offset translates into the possibly destructive combination of the incoming streams, ... The implementation of coordinated transmissions in a distributed network is hence challenging due to the complexity of the joint beamforming a nd the extensive sharing of infor...

Ngày tải lên: 20/06/2014, 22:20

... the set of measured channels intro- duced in Section 2. As mentioned in Section 1, it is in- appropriate to assess the performance of the OFDM system in terms of the SNIR, since maximizing it ... difference in the value of the impulse response from the beginning to the end of the symbol. The range of validity of this approximation will be assessed, a posteriori, in S...

Ngày tải lên: 20/06/2014, 22:20

... into intracell, intercell, and Pekka Pirinen 3 a a Desired link source node Desired link destination node Interfering node (a) Desired link source node Desired link destination node Interfering ... 2004. [8] P. Pirinen, “Outage evaluation of ultra wideband spread spec- trum system wi th RAKE combining in lognormal fading mul- tipath channels,” in Proceedings of IEEE 15th International...

Ngày tải lên: 22/06/2014, 22:20

... group of GHMP kinases in which proton transfer does not play a major role in the rate determining step of catalysis. That five of the 10 disease-causing mutations resulted in insoluble protein in ... analyzed by nonlinear curve fitting [27] using the program GraphPad Prism (GraphPad Software Inc.). Rates of reaction were obtained by fitting the absorbance data to straight lines....

Ngày tải lên: 08/03/2014, 02:20

... in this s tudy excludes the idea of a c atalytic triad involved in C-domain catalysis of NRPSs. With the ®nding of the additional residue R62 and con®rming the residues H147 and D151 abolishing ... systems of gramicidin S (Grs), tyrocidin A (Tyc), s urfactin (Srf), lichenysin (Lic), bacitracin ( Bac), fengycin (Fen), ente ro- bactin (Ent), chloroeremomycin (Cep), pristinamycin (Sn...

Ngày tải lên: 17/03/2014, 11:20

... designates the episode startpoint with probability 92.14%. It points to a moment of time and often marks the beginning of a new period. But the events happening after in might refer back- wards ... actually segmented into five subtasks such as: focusing on the expressions which contain the terms; determining the scope of the expressions; deciding on the condition wors- ening - increased,...

Ngày tải lên: 17/03/2014, 22:20

... using an alternative expression host {BL21(DE3)[pLysS]} or by including protease inhibi- tors in the solutions used during purification. Kinetic analysis of disease-causing mutations The steady-state ... method of Bradford [37] using BSA as a standard. The protein was stored frozen in small aliquots at ) 80 °C. Generation of point mutations Point mutations in the GALE sequence we...

Ngày tải lên: 23/03/2014, 11:20

... eluted using a linear gradient of 0–500 m M NaOAc in 0.1 M NaOH over 20 min and a flow rate of 1 mLÆmin )1 . Preparation of oligosaccharides O-Deacylation of LPS with hydrazine. O-Deacylation of LPS ... be detected in H. in uenzae LPS by a method involving analysis by HPAEC-PAD of terminal N-acetyl neuraminic 2 acid residues released by neuraminidase treatment [7]. However,...

Ngày tải lên: 23/03/2014, 21:20