medium access control modeling and simulation

... Kröger (2004), and they are derived from the mass balance for the control volume shown in Figures 1 and 2 Figure 1 shows a control volume in the fill of a counter flow wet-cooling tower, and Figure ... Merkel, and consists of differential equations that evaluate the air outlet conditions in terms of enthalpy and humidity, taking into account the water lost by evaporation and the NTU Jaber and Webb ... and petrochemical process industries, electric-power generating stations, and refrigeration and air conditioning plants In these systems, water is used to cool down the hot process streams, and

Ngày tải lên: 19/06/2014, 10:20

... (2000) Exergy and Energy Analysis of Food Drying... surface area of dried solid (m2) a,b constants (Eqs (35), (55), and (63)) 162 Heat and Mass Transfer – Modeling and Simulation ... correlated with Heat and Mass Transfer – Modeling and Simulation 158 empirical data comparing to model of the second drying period. Results of the statistical analyses (Table 1 and 2) confirm ... terms in infinite series are lying close together and truncating the series results in negligible errors. Heat and Mass Transfer – Modeling and Simulation 160 12345678910 Number of terms

Ngày tải lên: 19/06/2014, 10:20

... radioelements 137Cs, 60Co, and 106Ru Ruthenium is a high activity radioelement, and it is an emitter of α, β and γ radiations, with long a radioactive period However, Cesium and Cobalt are two low ... P at 1 atm and the plasma current I at 250 A Figures 4 and 5 present the results obtained for 60Co and 106Ru as a function of 2 O P For 60Co, a decrease in the vaporization speed and in the ... of matter conservation equations at the interface, for oxygen and metals, and the combination of equations (16), (17), (18), (19) and (20), lead to the following equation 1 dX Trang 3The equation

Ngày tải lên: 19/06/2014, 10:20

... t (3) where superscripts ‘a’ and ‘s’ imply the asymmetrical and symmetrical fluctuations, respectively C x y z t and m , , ,  C z t m* , are the concentration and the concentration in electrostatic ... MHD flow and system rotation mentioned above are required; the magnetic field generates micro-MHD vortexes, and the macroscopic rotation, as shown in Fig 9, bestows rotation direction and precession ... (> 0) and the concentration difference between the bulk and surface *(> 0), the average concentration gradient of the diffusion layer is written by * m c L  According to Eqs (3) and (13),

Ngày tải lên: 19/06/2014, 10:20

... verified and compared to existing protocols and standards by performance modeling and energy analysis Finally, the performance and feasibility of the design is validated by simulations and experimental ... periodic and relatively longterm random access periods TRAMA can provide collisionfree medium access in a static network Energy efficiency is reduced by signaling traffic overhead and the random access ... similarly to the analysis and simulations The access cycle length was fixed to two seconds and each access cycle contained two contention slots The activities measured in seconds and 60 seconds data

Ngày tải lên: 21/06/2014, 11:20

... Research Article A Framework for System-Level Modeling and Simulation of Embedded Systems Architectures Cagkan Erbas, Andy D Pimentel, Mark Thompson, and Simon Polstra Computer Systems Architecture ... Y-chart-based systems modeling, design space pruning and exploration, trace-driven cosimulation, and model calibration Copyright © 2007 Cagkan Erbas et al This is an open access article distributed ... layer, architecture model layer, and the mapping layer which is an interface between application and architecture models 2 THE SESAME APPROACH The Sesame modeling and simulation environment facili-tates

Ngày tải lên: 22/06/2014, 19:20

... Communications and NetworkingVolume 2006, Article ID 39814, Pages 1 17 DOI 10.1155/WCN/2006/39814 Energy-Efficient Medium Access Control Protocols for Wireless Sensor Networks Qingchun Ren and Qilian ... data packet for node j, and t1j,t2j, , t N jare independent and identically distributed (i.i.d.) random variables; packet for node j, and s1j,s2j, , s N jare i.i.d random variables also; dur-ing ... costs (i.e., broadcasting traffic schedules) and the re-duced flexibility to handle traffic fluctuations and topology slotted MAC protocols—is proposed and organizes sensor nodes into a slotted system

Ngày tải lên: 22/06/2014, 22:20

... power control and proceed to random node spacing using more realistic four-level transmit power control As intermediate steps, we cover non-optimum uniform spacing with optimal power control and ... model without medium access control Section 4 presents the MAC energy consumption models for the trans-mission and reception of data andSection 5deals with reg-ular sleep periods and presents ... that collects data and is not energy constrained No medium access control is as-sumed Energy per bit, energy efficiency, and total energy are derived for various traffic cases and node distributions

Ngày tải lên: 23/06/2014, 00:20

... designing efficient and stable algorithms for medium access control in multiple-accessed systems, in particular for sensor networks Keywords and phrases: MAC, feedback control, controlled Markov ... Aloha and TCP, use this kind of information for the rate control Current proposals for medium access protocol in sensor networks make use of randomized controllers The study of perfor-mance and ... which the control decisions are based We give a formal description of the sys-tem considered and of its dynamics, we formalize and solve an optimal control problem, and we show numerical simulations

Ngày tải lên: 23/06/2014, 00:20

... [53], Piperno [162], Lewis and Schrefler [132], Armero and Simo [7]–[9], Armero [10], Le Tallec and Mouro [131], Zohdi [208], [209], and the extensive works of Farhat and coworkers (Piperno et ... coworkers (Piperno et al [163], Farhat et al [65], Lesoinne and Farhat [130], Farhat and Lesoinne [66], Piperno and Farhat [163], and Farhat et al [67]) Generally speaking, if a recursive staggering ... wavelength and direction • For a prescribed temperature and wavelength, no surface can emit more energy than a black-body • Although the radiation emitted by a black-body is a function of wavelength and

Ngày tải lên: 06/08/2014, 01:21

... addition mode, and scale for a stirred vessel, and the effects of jet vii Modeling and Simulation of Antisolvent Crystallization: Mixing and Control velocity on the crystal size distribution and polymorphic ... control strategies The second part of the dissertation focuses on the viii Modeling and Simulation of Antisolvent Crystallization: Mixing and Control theoretical development and analysis of control ... of various simulation tools to help process engineers address the issues of mixing and control in antisolvent ix Modeling and Simulation of Antisolvent Crystallization: Mixing and Control crystallization...

Ngày tải lên: 14/09/2015, 09:18

... 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 ... village radio network Then we describe the medium access control for village radio network, which is a multi-hop Preamble based Time Division Medium Access protocol In chapter 5, we present the ... CHAPTER SIMULATION STUDIES AND PERFORMANCE COMPARISONS 61 7.1 Performance Metrics 62 7.2 Simulation Study I 62 7.2.1 Simulation Model 63 7.2.2 Simulation...

Ngày tải lên: 26/11/2015, 10:49

... distribution of PLA before and after enzymatic degradation Residual amounts of PLA after incubation for and 67 h were 40% and 27%, respectively [17, 18] 301 12 Modeling and Simulation of Microbial ... ) = g (M ) (12.28) 297 298 12 Modeling and Simulation of Microbial Depolymerization Processes of Xenobiotic Polymers Equation (12.26) and the conditions (12.27) and (12.28) form an inverse problem ... problems (12.35) and (12.30) also satisfies the condition (12.31), in case c(K ) and d(M ) are given by (12.33) Those techniques can be extended to cover the general case 299 12 Modeling and Simulation...

Ngày tải lên: 25/10/2013, 08:20

... Maintenance:- weed control, fertilizing, pruning and thinning, fire and pest protection  Inflows:wood; commercial thinning, final harvest non-wood; flora gathering, recreation, land renewal  Required ... Investment Evaluation Criteria The Land Expectation Value(LEV) model is applied in preference to the NPV model Key Parameters in Forestry Models Establishment:- land, land preparation, plant stock, ... storm, fire, pests and diseases, unsuitable species, collateral damage at harvest Forestry Risks  Timber return: inappropriate pruning and thinning, poor growth, timber usage and fashion changes...

Ngày tải lên: 23/03/2014, 04:20

... idea about modeling and simulation At the end of such a course, the student would be prepared to carry out complete and effective simulation studies, and to take advanced modeling and simulation ... with random wind gusts, mineral-processing plant with random grade ore, and phone network with random arrival times and call lengths 8 Modeling and Simulation of Systems Using MATLAB and Simulink ... the area of modeling and simulations, soft computing, intelligent adaptive control systems, and optimization He has also organized many short-term courses in the area of modeling and simulation...

Ngày tải lên: 01/04/2014, 10:55

... Implementations 62 3.4 Wireless Network Simulation Lessons Learned and Common Pitfalls—PHY Layer 69 v vi CONTENTS Medium Access Control Modeling and Simulation 72 4.1 Modeling and Simulation of Wired MACs 73 ... Introduction 1.1 Advantages and Disadvantages of Modeling and Simulation 1.2 Comparison of “Homebrew” Models and Simulation Tools 1.3 Common Pitfalls of Modeling and Simulation and Rules of Thumb 1.4 ... Aspects of Successful Network Modeling and Simulation 180 8.1 Verification and Validation 180 8.2 Data Visualization and Interpretation 185 Network Modeling and Simulation: Summary 186 References...

Ngày tải lên: 02/04/2014, 15:49

... Maas · R.W Dibble Combustion Physical and Chemical Fundamentals, Modeling and Simulation, Experiments, Pollutant Formation 4th Edition With 227 Figures and 22 Tables Prof Dr Dr h.c Jürgen Warnatz ... ways, and storage in data banks Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and ... absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use Typesetting: Digital data supplied by data Final processing:...

Ngày tải lên: 02/04/2014, 15:49

... new chemical plants and control and renovation of older ones as well The recovery of quantitative information concerning processes and process systems through modeling and simulations has some ... eliminated xxv xxvi Introduction Modeling and Simulation The Association for the Advancement of Modeling and Simulation Techniques in Enterprises (AMSE) defines the purpose of modeling as a schematic description ... the models The similarity and scale-up, scale effect and scale effect modeling, scale-up theory and hydrodynamic modeling, and scale effect and scale-up of column apparatuses are discussed The...

Ngày tải lên: 02/04/2014, 15:50

... reviews by Sellin and Moses [27, 28] and Bushnell and Hefner [29], the book by Gyr and Bewersdorff [30], and the latest reviews by Nieuwstadt and Den Toonder [31], Graham [32], and White and Mungal ... General Equations and Simulation Procedures 504 LCP and their Parameters Established in Simulations 508 Results of Simulations 511 Simulations of Steady Shearing Flows 511 Simulations of Transient ... years of research and development, polymer science and engineering has reached a high level of sophistication Application of modern computational tools and methods, and modeling and theories of...

Ngày tải lên: 02/04/2014, 16:28