access networks and physical media ppt

... Communications and Networks (IC3N ’98), pp 153–161, Lafayette, La, USA, October 1998 [3] K H Wang and B Li, “Efficient and guaranteed service coverage in partitionable mobile ad hoc networks, ... behavior in directions x and y on the plane. One should notice that the states of the MCs (for each direction, x and y) in this case represent the position variation and not the X and Y position themselves. ... (for both x-andy-directions). 3.1.1. Analytical modeling The SIMM model uses two Markov chains with discrete pa- rameters and 3 states (0, 1, and 2), to represent movements in the x-andy-coordinate,

Ngày tải lên: 22/06/2014, 19:20

... describes the current medium access control (MAC) and routing protocols for vehicular networks, and the various factors that affect their design and performance The mobility and speed of the communicating ... with-inside and with-outside vehicle via vehicu-lar networks, and new technologies have been developed for vehicular networks This chapter is meant to introduce the emerging area of vehicular networks and ... the authors describe me- Trang 11dium access control (MAC) and routing protocols for vehicular networks and the various factors that affect their design and performance.Chapter VII Inter-Vehicular

Ngày tải lên: 27/06/2014, 01:21

... self-sustaining and/or adaptive will be necessary To prepare the U.S for its future as an enduring and relevant presence in space, both basic and applied research in the life and physical sciences ... Initiative will require a greater understanding of life and physical sciences phenomena in microgravity as well as in the partial gravity environments of the Moon and Mars Therefore, the Administrator ... delivering the lunar landings, the space shuttle, and, in partnership with other nations, the International Space Station (ISS) NASA’s rich and successful history has been enabled by, and responsible

Ngày tải lên: 29/06/2014, 09:20

... estimation over orthogonal access fading channels in wireless sensor networks— optimal and suboptimal estimatorsmultiple-Xin Wang∗1 and Chenyang Yang1 1 School of Electronics and Information Engineering, ... known and unknown CSI and their special cases, and Section 4 introduces the suboptimalestimator In Section 5, we analyze the asymptotic performance and complexity of the presented MLEs anddiscuss ... observation and channel models, which minimizes the MSE of parameterestimation The bandwidth and energy constraints are two critical issues for the design of WSNs When the strictbandwidth constraint

Ngày tải lên: 20/06/2014, 04:20

... Research Article QoS Differentiated and Fair Packet Scheduling in Broadband Wireless Access Networks Rong Yu,1Yan Zhang,2and Shengli Xie1 1 School of Electronic and Information Engineering, South ... expected that broadband wireless access (BWA) networks should be able to support high-speed, high-quality, realtime, and nonrealtime applications, such as video, image, voice, text, and data Quality ... BWA networks Packet scheduling algorithms, which are in charge of the bandwidth allocation and multiplexing at the packet level, play key roles for resource sharing and QoS provisioning in BWA networks

Ngày tải lên: 21/06/2014, 23:20

... England,J Scotland and Wales J r'lf) 咱 3 2γyι~-' 、 41 Trang 2542 Taxation and Representation: The Media, Poli位叫Communi阻tionand the Poll Ti揖 h 也efinal two ye盯'Sbetween the announcement and ... salience and form, and the unavoidable exigencies and speed of routine news production，也enews process produces 'a systematically structured over-accessing to the media of those in powerful and privileged ... 仰argaretThatcher] got chucked out …Ithink [John Major] was weak, and that he did too much to-ing and fro-ing andshill抖ngand shallying and this and that, but having said that, it was really, yes he' s

Ngày tải lên: 30/03/2014, 11:20

... Increased Bandwidth Demand 24  Savings on Intermediate Bandwidth 24  Combined VC-4 and IMA Aggregation 25  Trang 4CONTENTS Integration of 2G and 3G Traffic 26  TDM Multiplexing of 2G and 3G Traffic ... allowing these networks to provide for fast growth and cost-effective bandwidth increase 3G access networks are based on two distinct technologies: transmission and ATM Conventional 3G access infrastructures ... bandwidth demand, applications, and so on, networks must be as cost-effective as possible in their initial, low-level usage phase Equipment costs, as well as expenditure on leased bandwidth and

Ngày tải lên: 19/04/2014, 19:07

... frame of reference; 2) recall and sampling of salient experiences; 3) standards of comparison used to appraise experiences; and 4) subjective algorithm used to prioritize and combine appraisals to ... Sprangers and Schwartz (1999) model and highlighting appraisal processes, provides a fully testable theoretical treatment of QOL and change in QOL, suggesting hypothesized causal relationships and ... unmet needs, and appraisal of health and health care options Patient self-report is the most desirable, and often the only way to obtain this critical information Thus, accurate and meaningful

Ngày tải lên: 20/06/2014, 15:20

... initial score, and the intra-class correlation coefficient (estimated from a random effects model using subject, visit and error) was 0.80 Discussion We have described the development and preliminary ... RN, and Heather Zuleba. References 1 Hirsh J, Dalen JE, Anderson DR, Poller L, Bussey H, Ansell J, Deykin D, Brandt JT: Oral anticoagulants: mechanism of action, clini-cal effectiveness, and ... adherence, poorer INR control, and poor clinical outcomes, the DASS has the potential to help identify reasons for dissatisfaction (and positive satisfaction), and thus help to develop interventions

Ngày tải lên: 20/06/2014, 15:20

... transmitter and the receiver and that between the interferer and the receiver ared Sandd I meters, respectively The transmission power of the transmitter and the interferer are P S and P I watts, ... carrier sensing range and transmission range 5 Partial Interference in 802.11 In this section, we study partial interference in 802.11 networks, the prevalent wireless random access networks 0 0.05 ... interference on multiple access networks, we propose an analytical framework to characterize partial interference for two representative types of multiple access wireless networks, namely, the IEEE

Ngày tải lên: 21/06/2014, 11:20

... percentage of correct identification is about 97% In [6], Wong and Nandi have proposed a method for ADMR using artificial neural networks and genetic algorithms In their study, they have presented ... densities of phases and amplitudes In [20], Pedzisz and Mansour derived and analyzed a new pattern recognition approach for automatic modulation recognition of M-PSK signals in broadband Gaussian noise ... (MLPs), radial basis function (RBF) networks, and self-organizing maps (SOMs) We had chosen MLP feed-forward networks in our work because of their simplicity and effective implementations; also

Ngày tải lên: 21/06/2014, 16:20

... terminated and the interference caused to PUs A variety of studies that focus on priority mechanisms to handle conventional handovers in cellular networks have appeared in the literature, see [8] and ... band, the arrival of a PU will force the termination of one SU when there areN − i + 1 SUs in the second band, of two SUs when there areN − i + 2 SUs in the second band, and so on The second and ... variation ofPft2 and the interference with the SUs arrival rate when the objectives areBft2 ≤ 0.05 and limitPft andPif(n ≤ N) to their objectives or below, and Trang 8(1)D, Dft andDif are internal

Ngày tải lên: 21/06/2014, 17:20

... update for wireless PCS networks, Wireless Networks, 1, 187–196, 1995 2 I F Akyildiz, J S M Ho, and Y.-B Lin, Movement-based location update and selective paging for PCS networks, IEEE/ACM Transactions ... Mobile and Wireless Networks, Upper Saddle River, NJ: Prentice Hall, 1996 7 U Black, Second Generation Mobile and Wireless Networks, Upper Saddle River, NJ: Prentice 10 A Bar-Noy, I Kessler, and ... communication networks, Mobile Networks and Applications, 1, 49–56, 1996 11 A Bar-Noy, I Kessler, and M Sidi, Mobile users: To update or not to update? Wireless works, 1, 175–185, 1995 Net-12 Y Birk and

Ngày tải lên: 13/08/2014, 12:21

... E, turnover rates and (measured in s-1), the shortcuts ã = a/ and = b/ , and Michaelis-Menten constants and (in mM) The rate law (1) can be derived from an enzyme mecha-nism: and are the dissociation ... assays and stored in kinetic databases Background Dynamic modelling of biochemical networks requires quantitative information about enzymatic reactions Because many metabolic networks are known and ... Trang 1Open Access Research Bringing metabolic networks to life: convenience rate law and thermodynamic constraints Wolfram Liebermeister* and Edda Klipp Address: Computational

Ngày tải lên: 13/08/2014, 16:21

... components and are described by the relation εij = −3/2[I i I jαiαj /(I i + I j ) ]r−6where Ii and Ij are the ionization potentials and αi, αj are the polarizabilities of components i and j Hence, ... solvent if χ12 valueslie between 0.4 and 0.5 and a non-solvent for higher values From the expressions (4.22) and (4.32), the critical temperature of demixing (T c) andθ temperature can a lower critical ... the total volume of the solution and thevolume inaccessible to this macromolecule due to the presence of other macro-molecules assump-Let V and R be the volume and the radius of a sphere (radius

Ngày tải lên: 14/08/2014, 10:20

... K., Bhowick and H L., Stephens (Ed.), Handbook of Elastomers, Marcel Dekker, New H F., Mark and N M., Bikales, C G Overberger, and G Menges (Eds.), Encyclopedia of Polymer Science and Technology, ... Brandrup, E H., Immergut, and E A., Grulke, Polymer Handbook , 4th edition Wiley, New York, 1999 J A., Brydson, Plastic Materials, Butterworths-Heinemann, Oxford, UK, 1999. O Olabisi (Ed.), Handbook ... poly-condensation of o-phthalic anhydride with glycerol, and the resulting network is represented hereafter Organic and Physical Chemistry of Polymers, by Yves Gnanou and Michel Fontanille Copyright  2008 John

Ngày tải lên: 14/08/2014, 10:20

... nodes and relays, low and variable channel capacity, and dynamic topology due to node mobility In this study, we concentrate on three main layers: the physical, media access control (MAC), and ... in such networks and the use of wireless media All nodes in MANETs are capable of movement and can be connected dynamically in an arbitrary manner There are no fixed routers in these networks; ... composition of the routing infrastructure, (that is, from fixed, hard-wired, and bandwidth-rich to dynamic, wireless, and bandwidth-constrained), the routing algorithms must be reworked MANETs have

Ngày tải lên: 26/11/2015, 10:49

... modeling of complex magnetic media In these applications, different neural archi-tectures and learning paradigms have been used Fully con-nected networks and feed-forward networks are among the commonly ... between parentheses)[18] Fig 11 Measured and computed (a) M and (b) strain, for normalized H values and applied mechanical stresses of 0.9347 and 34.512 Kpsi[13], and (c) M–H curves for CoCrPt hard ... Trang 1Utilizing neural networks in magnetic media modeling and field computation: A review a Electrical Power and Machines Department, Faculty of Engineering, Cairo

Ngày tải lên: 13/01/2020, 03:20

... exact and asymptotic expressions to explore physical channel-assisted security of NOMA networks in large-scale networks wherein spatially randomly location deployment for both NOMA users and eavesdroppers ... multiple access (MA) techniques, cognitive radio, heterogeneous networks, millimeter wave communications, input multiple-output (MIMO) for large-scale networks can be implemented to upgrade current networks ... including orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA), these considered main categories are deployed to primarily pro-vide multiple access methodology In MA, it

Ngày tải lên: 22/11/2022, 14:09

... ROUTING AND REMOTE ACCESS 1 I. ROUTING 1 II REMOTE ACCESS 1 CHƯƠNG II: TRIỂN KHAI ROUTING AND REMOTE ACCESS 2 I. MÔ HÌNH LAB 2 II NÂNG CẤP DOMAIN CONTROLLER 3 III TRIỂN KHAI ROUTING AND ... trên PC02 và PC03:Bước 1: Mở Routing And Remote Access trong Administrative Tool > Chuột phải tên PC > Chọn Configure and Enable Routing and Remote Access Bước 2: Màn hình Welcom > Chọn ... – VÕ KHÁNH DUY – NGUYỄN DUY KHÁNH Trang 8 Trang 13III TRIỂN KHAI ROUTING AND REMOTE ACCESS1 CÀI ĐẶT ROLE ROUTING AND REMOTE ACCCESS Thực hiện trên PC02 và PC03: Bước 1: Mở Server Manager >

Ngày tải lên: 20/03/2014, 23:20