đổi mới toàn diện thực tiễn dạy học hoá học theo tư tưởng công nghệ dạy học hiện đại
Protocols For High Efficiency Wireless Networks
... [15]-[20] that provides packet switched services in an evolved GSM network (GSM-phase 2+) up to (theoretically, with no coding protection) about 170 kbit/s by assigning slots of the same frame ... utilize one GSM carrier (lightly loaded system) and must have good channel conditions Even if the theoretical maximum capacity for GPRS corresponds to the assignment of all the eight slots of a...
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Radio resource allocation in wireless OFDM systems
... using both centralized optimization and game theoretic approaches Unlike many other works that use real numbers for bit-loading from the information theoretic approach, we consider only integer ... and the optimal solution of resource allocation is provided by the water filling (WF) theorem in information theory [1] To achieve the channel capacity with a given power budget, the transmission ... how multiple cells compete for common radio resources, game theory has been explored and applied In its non-cooperative setting, game theory models the conflicts among a set of rational players,...
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High capacity high spectral efficiency transmission techniques in wireless broadband systems
... constraints imposed on the two service categories (voice and data) Both our simulation results and theoretical Summary ix derivations prove that the system capacity is enhanced with the proposed ... /Req from a single data user β = 4, mv = dB, md = dB, σv = σd = dB.120 4.7 Comparison between (i) theoretical log-normal distribution and (ii) distribution of the total received power from data ... Finally, conclusions are drawn in Chapter to summarize the thesis 1.4 Contributions In Chapter 2, the theoretical treatment for the interchannel interference (ICI) in OFDM system is presented It is...
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Báo cáo hóa học: " Research Article Signal Processing by Generalized Receiver in DS-CDMA Wireless Communication Systems with Optimal Combining and Partial Cancellation" docx
... approach is simple, but it might not provide satisfactory performance In this paper, we use Price’s theorem [26, 27] to derive a range of the optimal PCF for the first stage in PPIC of DS-CDMA system ... sciencedirect.com/science/journal/10512004, click “Volume 8, 1998”, “Volume 8, Issue 3”, and “A new approach to signal detection theory”) Integrator + + × R 2L sk (t) = s∗ (t) k + × where β = The main functioning condition of ... derivations in [20], the expectation terms with hard decisions in (57) can be evaluated based on Price’s theorem [26] as follows With this, we can rewrite (62) and (64) as follows: E E ρik ρ jk bi(0) 2Q...
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Báo cáo sinh học: " Research Article Automatic Modulation Recognition Using Wavelet Transform and Neural Networks in Wireless Systems" ppt
... improve the convergence of the ANN This method was developed in [18] by combining adaptive resonance theory 2A (ART2A) with discrete wavelet neural network It was shown through simulations that high ... the in-phase distribution of the desired signal In [21], the recognition vector of the decision-theoretic approach and that of the cumulantbased classification are combined to compose a higher ... recognition based on the spectral features of the modulated signal It was shown that the first decision-theoretic algorithm has a poorer performance than the second ANN-based one In this study, the proposed...
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Báo cáo hóa học: " Editorial Cross-Layer Design for the Physical, MAC, and Link Layer in Wireless Systems" doc
... allocation Finding the capacity of MIMO broadcast channels, a long standing problem in the information theory community, was recently solved Brehmer and Utschick, in their work entitled “Nonconcave utility...
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Co existence of wireless communication systems in ISM bands an analytical study
... Under AWGN Channel 29 2.4.1.1 Semi-analytical Approach 29 2.4.1.2 Accurate Theoretical Approach 31 2.4.1.3 Approximate Theoretical Approach 33 2.4.2 Under Fading Channel 35 2.4.3 Under Interference ... BER and SNR in the AWGN channel is thus obtained via this model 2.4.1.2 Accurate Theoretical Approach In [39], the theoretical BER performance of GFSK is described They proposed a method for calculating ... not the first to propose an integrated approach to study the coexistence problem in a complete theoretical analysis, our model is different from others in implementation and complexity Moreover...
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Simulation of Wireless Network Systems
... real system operating under the same conditions; (b) expert intuition; (c) theoretical (analytic) results using queuing theory or other analytic methods; (d) another simulation model; and (e) artificial ... essential for stable operation † Simulation modeling involves programming, mathematics, queuing theory, statistics, system engineering and science as well as technical documentation Clearly, it ... techniques This distribution is very important in statistical applications due to the central limit theorem, which states that under general assumptions, the mean of a sample of n mutually independent...
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Inclusion of new types in relational database systems
... key-2 implies key-2 = key-1 key-1 > key-2 if key-2 < key-1 key-1 >= key-2 if key-2
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Soft errors in modern electronic systems
... errors in Sun’s Enterprise server results in design reforms leading to the applications of coding theory and inventions of new design techniques A serious reader must go through Chap to learn the ... (1959)”, in A H Taub, editor, John von Neumann: Collected Works, Volume V: Design of Computers, Theory of Automata and Numerical Analysis, Oxford University Press, 1963, pp 329–378 References...
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Tài liệu THE ROLE OF UNIVERSITIES IN REGIONAL INNOVATION SYSTEMS - A NORDIC PERSPECTIVE pdf
... increase in aggregate demand would re-ignite inflationary expectations According to established theory the great policy challenge was to fine tune the economy so it could pass safely in the narrow ... the start of something new quite different from the fast stable growth of 1950s and 1970s The old theory was an inappropriate tool for understanding the new economic situation The growth rate in ... the Japanese system of innovation Freeman applied a combination of organisation and innovation theory to highlight the interactions between the production system and the innovation process Based...
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Tài liệu On Data Throughput in Structured Cabling Systems pptx
... DOES In-House Testing We consider field network testing to be the most accurate way to correlate theoretical base to real world performance To this, we measure the product performance in the laboratory...
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Tài liệu ADVANCES IN DISCRETE TIME SYSTEMS docx
... WhenΔK = 0, Theorem 3.1 reduces to Theorem 3.2 Remark 3.6 Notice that the condition displayed in Theorem 3.2 is the same as one displayed in Theroem 2.2 This implies that the result given by Theorem ... B0R1(k)) k=0 by using Lemma 3.1 and the similar argument as in the proof of Theorem 3.1 Thus, we have the following theorem: Theorem 3.2 There exists a central discrete-time state feedback stochastic ... combining the techniques of Xu (2008 and 2011) with the well known LQG theo ry This result is given by the following theorem Theorem 3.1 There exists a discrete-time state feedback stochastic mixed...
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Tài liệu Teamwork in Multi-Agent Systems: A Formal Approach pptx
... Teamwork: Theorem Proving 5.4.1 Potential Recognition 5.4.2 Team Formation 5.4.3 Plan Generation 5.4.4 A Social Plan for Proving the Theorem 5.4.5 A Collective Commitment to Prove the Theorem 5.4.6 ... develop a formal logical theory that gives an insight into the processes underpinning collaborative effort The approach is distinguished from related work in for example game theory by the fact that ... autonomous agent Speech act theory, a branch of the philosophy of language, has been used to give semantics to the agent communication language of FIPA Similarly, argumentation theory – the philosophy...
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