early stopping of cancer clinical trials
Design and analysis of object allocation and replication algorithms in distributed databases for stationary and mobile computing systems
Ngày tải lên :
16/09/2015, 17:11
... 121 v List of Figures 2.1 An illustration of the system model of a DDBS 11 3.1 Illustration of the concurrent control mechanism 25 3.2 Illustration of phase partition ... 3.3 Example of the working policy of the window mechanism in DWM algorithm 29 3.4 Illustration of two extreme cases in DWM algorithm 31 3.5 Competitive ratio comparison of DWM, DA, ... allocation schemes of objects so as to minimize the total servicing cost of the arriving requests The contributions of this thesis are mainly from theoretical standpoint in terms of competitive analysis...
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Design and analysis of object replacement policies on dynamic data allocation and replication algorithm with buffer constraints
Ngày tải lên :
04/10/2015, 10:24
... number of reading processors of Np (i) We have |Np (i)| = np (i) np (i) Na (i) The set of all different reading processors of the ith sub-schedule ψo (i) The number of all reading processors of Na ... the beginning of win(o) Then, we show that the cost of DWM-NR on both types of sub-schedules is at most (1 + Cc + Cd ) times as much as the cost of an optimum offline algorithm Proof of Part A (for ... world of online computation, an algorithm must produce a sequence of decisions that will have an impact on the final quality of its overall performance Each of these decisions must be made based of...
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Báo cáo hóa học: " Research Article Design and Analysis of an Energy-Saving Distributed MAC Mechanism for Wireless Body Sensor Networks" doc
Ngày tải lên :
21/06/2014, 11:20
... number of sensors is limited and an external mobile device, such as PDA or cell phone, acts as a BAN coordinator However, the promising accomplishment of the DQBAN protocol in terms of quality of ... here of fixed length (i.e., independent of the number of sensors in the BSN) and contains two new fields for specific energy-saving purposes, the modulation and coding scheme (MCS) and length of the ... rate λ is the ratio of the average number of newly arrived packets of Lbit bits—generated in messages— per DQ-MAC superframe unit (N) The average service rate μ is the ratio of served packets per...
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Báo cáo hóa học: " Design and Analysis of Nanotube-Based Memory Cells" ppt
Ngày tải lên :
22/06/2014, 01:20
... study feasibility of large nanotube-based memory cells in practical applications Fabrication of arrays of nanotube structures such as we propose in this paper is a subject of much ongoing research ... the fabrication of regular arrays of CNTs suitable for use in integrated circuits has been demonstrated Extension of these or other techniques for fabricating regular arrays of DWNTs will be ... the top of the outer tube symmetrically A constant voltage of 16 V with a time interval of ns is applied on those two electrodes alternatively Initially, the inner tube is at the center of the...
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Báo cáo hóa học: " Research Article Design and Analysis of the First BOWS Contest" potx
Ngày tải lên :
22/06/2014, 19:20
... based on the theory of side informed watermarking; (ii) necessity of obtaining the consensus of the inventors of the watermarking systems to use it in the contest; (iii) necessity of using a complete ... following results: PSNR of the image Strawberry = 39.67 dB, PSNR of the image Wood Path = 39.65 dB, and the PSNR of the image Church = 38.45 dB By analyzing the hall of fame at the end of the first phase, ... massive use of the sensitivity attack during the contest, with particular reference to the second phase In Table 5, the ten best results of the BOWS hall of fame, at the end of the six months of the...
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Báo cáo hóa học: " Cross-Layer Design and Analysis of Downlink Communications in Cellular CDMA Systems" docx
Ngày tải lên :
22/06/2014, 22:20
... others of its kind, we consider multipath fading as part of the channel impairments instead of using an orthogonality factor (OF) in (1) Authors of [13] argue that OF is defined as the fraction of ... soft handoff algorithm Mobile transfers pilot to active set and sends back HCM Terminate (b) Proposed soft handoff procedure Figure 6: Soft handoff algorithm and procedure 4.2 Soft handoff One of ... specifications of WCDMA Multiple access technique Direct-spread code Number of slots/frame 15 Number of chips/slot 2560 4.4–5.2 MHz Intrasystem handoff Soft/softer handoff Chip rate of spreading...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 2 ppt
Ngày tải lên :
12/08/2014, 16:21
... Costs The message costs of Flood+Reply, and thus of Shout, are simple to analyze As mentioned before, Flood+Reply consists of an execution of Flooding(Q) with the addition of a reply (either Yes ... spanning tree T[s] of the network; Starting from the leaves of T[s] , the entities perform a convergecast on T At the end of the convergecast, s becomes aware of the global termination of the broadcast ... tree of G; furthermore, this tree is rooted in the initiator s 56 BASIC PROBLEMS AND PROTOCOLS Theorem 2.5.1 Protocol Shout correctly terminates Proof This protocol consists of the flooding of...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 4 docx
Ngày tải lên :
12/08/2014, 16:21
... Because of its complexity and the variety of scenarios that can be created, there is no satisfactory complete proof of the correctness of the Mega-Merger protocol We will discuss here a partial proof ... knowledge of the network, not even of its size (it is not part of the standard set of assumptions for election); how does an entity finds out that all the nodes are now part of the same city? Clearly, ... messages regardless of the location and the number of the initiators Exercise 3.10.55 Show that the effect of rounding up α i does not affect the order of magnitude of the cost of Protocol MarkBorder...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 6 potx
Ngày tải lên :
12/08/2014, 16:21
... set of Reduction Tools Summarizing, Protocol REDUCE, composed of the application of Reduction Tools and 2, reduces the search space from N to at most ⌬2 Protocol CUT, composed of a sequence of ... FIGURE 5.10: Diagram of operations of OddEven-LineSort in a line of size n = 301 SORTING A DISTRIBUTED SET Data Exchange At the basis of the technique there is the exchange of data between two ... the number of iterations is at most n − (instead of N − 1) This means that the cost of computing the AND is O(n2 ) (instead of O(N n)) Surprisingly, even in this case, the total number of messages...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 7 docx
Ngày tải lên :
12/08/2014, 16:21
... variations of this solutions; for example, each pair of neighbors could use a different type of communicator There exists a way of drastically reducing the time without increasing the number of bits ... more than any strategy of any type which uses the same maximum number of corruptible bits Consider now the case of incorruptible transmissions Let α(t, b) denote the size of the largest set for ... = I The correctness of the protocol derives from the fact that the mapping we are using is a bijection Let us examine the cost of protocol Orderk The number of bits is clearly k + B[Orderk ](I...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 8 doc
Ngày tải lên :
12/08/2014, 16:21
... Proof First of all, observe that as is applicable to C, by definition of A and because of the unpredictability of communication delays, is applicable to every A ∈ A Let us now start the proof ... number of faults is nearly one third We will so in an efficient simulation of protocol Rand-Omit We will first translate our system of n entities, of which f < n are faulty, into a system of k > ... an example of the impact of node-connectivity on the existence of fault-tolerant solutions, consider the problem of an initiator that wants to broadcast some information, but some of the entities...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 9 pdf
Ngày tải lên :
12/08/2014, 16:21
... COMPUTING IN PRESENCE OF FAULTS The values of the registers and of the global clock, together with the program counters and the internal storage, comprise the internal state of an entity The states ... value of a bit within a fixed amount of time T in spite of F communication faults per clock cycle This reliable broadcast, once constructed, is then used to correctly compute the logical OR of the ... unit 478 COMPUTING IN PRESENCE OF FAULTS Let us now focus on the bit costs of the protocol Consensus-Omit obtained by computing the OR of the input values by means of algorithm Bcast-Omit We have...
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DESIGN AND ANALYSIS OF DISTRIBUTED ALGORITHMS phần 10 docx
Ngày tải lên :
12/08/2014, 16:21
... and (if required) notify all other entities of the result of the local query Depending on the size of the local fragments of the snapshot, the amount of information transmitted can be prohibitive ... regardless of the location of y in the network It uses a spanning tree of the network; it also requires the existence and availability of a correct routing mechanism (possibly, using only edges of the ... the ordered couple r(x) = (id(x), tx ) composed of the id of x and of the value tx of the local clock when the request is made These couples are clearly totally ordered as the ids are unique Unfortunately,...
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design and analysis of high-frequency matrix converters for induction heating
Ngày tải lên :
13/11/2014, 06:49
... the time of the publication of the review in [1.1] Historically, the performance of the voltage-source inverter was essentially ignored because of poor load regulation, slow turn-off time of the ... representing the underlying physical structure of the system, is often sufficient for off-line simulation of highly complex non-linear systems ANFIS uses a combination of neural networks and fuzzy logic ... from the surface at which the magnitude of the current density is 1/e of its value at the surface (where e is the base of natural logarithms) is called ‘depth of penetration’ or ‘skin depth’ [1.2]...
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Design and Analysis of Computer Algorithms
Ngày tải lên :
24/12/2014, 19:58
... degree of a graph, we usually mean the maximum degree of its vertices When discussing the size of a graph, we typically consider both the number of vertices and the number of edges The number of ... subdivision of the interior of P into a collection of triangles with disjoint interiors, whose vertices are drawn from the vertices of P Equivalently, we can define a triangulation as a maximal set T of ... optimal Proof of Optimality: Our proof of optimality is based on showing that the first choice made by the algorithm is the best possible, and then using induction to show that the rest of the choices...
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Design and analysis of rectifying circuits and antennas for wireless power transmission and ambient RF energy harvesting
Ngày tải lên :
09/09/2015, 11:12
... study i Table of Contents Acknowledgements i Table of Contents .ii Summary v List of Tables vii List of Figures viii List of Acronyms ... 45 Figure 3.1 Circuit configuration of the proposed rectenna 49 Figure 3.2 Configuration of the antennas (a) Top view of the proposed one (b) Side view of the proposed one (c) A two-element ... voltages of the rectenna with a 2800-Ω resistor as the function of the input power level at 2.45 GHz (b) Photograph of the fabricated rectenna .58 Figure 3.10 (a) Simulated power level of each...
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Design and analysis of computer experiments for stochastic systems
Ngày tải lên :
09/09/2015, 17:52
... heteroscedastic case 21 2.3 Review of Design of Experiment for Computer Simulation 2.3 Review of Design of Experiment for Computer Simulation Experimenters use the design of experiment to increase the ... these type of methods require prior information of the simulation model and sufficient computing budget to reduce the variability of the observed data, which is unrealistic for most of the real-world ... analyzing the influence of the random noise on the parameter estimation uncertainty of the model Other than the kriging predictor, we also study the estimation of the variance of noise process at...
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