Xem 1-20 trên 118 kết quả Random systems
  • Technical Analysts often find a system or technical method that seems extremely profitable and convenient to follow - one that they think has been overlooked by the professionals. Sometimes they are right, but most often that method doesn't work in practical trading or for a longer time. Technical analysis uses price and related data to decide when to buy and sell. The methods used can be interpretive as chart patterns and astrology, or as specific as mathematical formulas and spectral analysis. All factors that influence the markets are assumed to be netted out as the current price....

    pdf22p vigro23 29-08-2012 32 4   Download

  • Validation of Communications Systems with SDL provides a clear practical guide to validating, by simulation, a telecom system modelled in SDL. SDL, the Specification and Description Language standardised by the International Telecommunication Union (ITU-T), is used to specify and develop complex systems such as GSM, GPRS, UMTS, IEEE 802.11 or Hiperlan. Since the downturn in the telecom industry, validating a system before its implementation has become mandatory to reduce costs.

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  • Random matrices are widely and successfully used in physics for almost 60-70 years, beginning with the works of Wigner and Dyson. Initially proposed to describe statistics of excited levels in complex nuclei, the Random Matrix Theory has grown far beyond nuclear physics, and also far beyond just level statistics. It is constantly developing into new areas of physics and mathematics, and now constitutes a part of the general culture and curriculum of a theoretical physicist.

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  • Dedicated to the memory of Gert Kjærg˚ Pedersen ard Abstract In the process of developing the theory of free probability and free entropy, Voiculescu introduced in 1991 a random matrix model for a free semicircular system. Since then, random matrices have played a key role in von Neumann algebra theory (cf. [V8], [V9]). The main result of this paper is the follow(n) (n) ing extension of Voiculescu’s random matrix result: Let (X1 , . . . , Xr ) be a system of r stochastically independent n × n Gaussian self-adjoint random matrices as in Voiculescu’s random matrix paper...

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  • We take a critical look at the relationship between the security of cryptographic schemes in the Random Oracle Model, and the security of the schemes that result from implementing the random oracle by so called \cryptographic hash functions". The main result of this paper is a negative one: There exist signature and encryption schemes that are secure in the Random Oracle Model, but for which any implementation of the random oracle results in insecure schemes.

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  • This book is the result of several years of teaching and research at the Federal University of Campina Grande and Federal University of Pernambuco, Brazil. It is intended to serve as an introductory textbook for courses dealing with Communication Systems or Modulation Theory. The modulation theory is dealt with using stochastic processes, which is novel for undergraduate texts. The book is suitable for the under- graduate as well as the initial graduate levels of Electrical Engineering courses. ...

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  • A combination User's Manual and Programmer's Guide for JASP, a simulation language for use on the JOSS time-shared system.Written in JOSS language, JASP provides standard routines for performing functions that are common to many simulations:initialization; time and event control; information storage and retrieval; performance data collection; summary, monitoring, and error reporting; and random de......

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  • This report presents the results of a theoretical analysis of a frequency-hopping, multiple-frequency-shift-keyed, spread-spectrum communication system using a nonprocessing communication satellite transponder. A large number of users are assumed to be hopping pseudo-randomly about the transponder passband in time synchronization and approximate frequency synchronization. The users are assumed to ......

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  • Because test scores that are part of its enlisted promotion system are not standardized, the U.S. Air Force effectively emphasizes longevity and test-taking ability differently across and within specialties, and this emphasis varies randomly over time. The random aspects of the promotion reward system mean that the Air

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  • Random PCR mutagenesis was applied to theThermus thermophilus xylA gene encoding xylose isomerase. Three cold-adapted mutants were isolated with the following amino-acid substitutions: E372G, V379A (M-1021), E372G, F163L (M-1024) and E372G (M-1026). The wild-type and mutated xylAgenes were cloned and expressed in Escherichia coliHB101 using the vector pGEMÒ-T Easy, and their physicochemical and catalytic properties were determined.

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  • Speed Memory will enable you to remember lists of objects not only in order, but also in reverse and random order; to remember names and faces, as well as facts associated with them; to remember speeches, scripts, articles, jokes and narratives; to remember dates, prices, numbers (including telephone numbers!) and anniversaries; and to remember far more readily languages and information relevant to examinations. You will also be able to perform 'memory feats' with * number games and cards....

    pdf162p dangnga 29-06-2013 128 62   Download

  • This book is devoted to the theory of probabilistic information measures and their application to coding theorems for information sources and noisy chan- nels. The eventual goal is a general development of Shannon's mathematical theory of communication, but much of the space is devoted to the tools and methods required to prove the Shannon coding theorems. These tools form an area common to ergodic theory and information theory and comprise several quantitative notions of the information in random variables, random processes, and dynamical systems....

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  • Packets transmitted by AARP that determine if a randomly selected node ID is being used by another node in a nonextended AppleTalk network. If the node ID is not being used, the sending node uses that node ID. If the node ID is being used, the sending node chooses a different ID and send more AARP probe packets. See also AARP.

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  • These are charts from Ganymede Chariot used in a lab based on FIFO (no queuing). TCP traffic was going all over the chart. With nothing controlling the traffic, throughput is horrible and completely unpredictable! With Traffic Shaping, Frame Relay DE bit setting, Class-Based Weighted Fair Queuing (CBWFQ), and Weighted Random Early Detection (WRED) enabled, the network is much more well behaved. We’ll discuss CBWFQ and WRED in the Queuing module. In this section we’ll look at techniques for Classification and Marking.

    pdf96p xuankhuong 03-09-2009 85 16   Download

  • page 3 Review of Stochastic Processes and Random Variables. Review of Discrete-Time Signal Processing. Components of a Digital Communication System. OFDM WLAN Overview. Single Carrier Versus OFDM Comparison. Chap 2 - Synchronization. page 51 Timing Estimation. Frequency Synchronization. Channel Estimation. Clear Channel Assessment. Signal Quality. Chap 3 - Modulation and Coding

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  • Strengthening functioning systems to improve health outcomes will, in some cases, require new ways of thinking about health investments and greater dialogue with partner countries about constraints and opportunities.

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  • • Cache hit o A requested instruction or data is in cache o Cache performance is high when cache hit rate is high • Cache miss o A requested instruction or data is not in cache o Cache performance is low when cache miss is high • Line fill o Retrieving data from external memory to cache in case of cache miss o Caches retrieve a complete line

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  • This best-selling, easy to read book offers the most complete discussion on the theories and principles behind today's most advanced communications systems. Throughout, Haykin emphasizes the statistical underpinnings of communication theory in a complete and detailed manner. Readers are guided though topics ranging from pulse modulation and passband digital transmission to random processes and error-control coding. The fifth edition has also been revised to include an extensive treatment of digital communications....

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  • During the last two decades, increase in electricity demand and environmental concern resulted in fast growth of power production from renewable sources. Wind power is one of the most efficient alternatives. Due to rapid development of wind turbine technology and increasing size of wind farms, wind power plays a significant part in the power production in some countries.

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  • 1 RAM stands for Random Access Memory. True False 2 If memory is volatile, it means that information is lost when the computer is turned off. True False 3 RAM is non-volatile. True False 4 ROM is volatile. True False 5 DIMMs can be used to expand RAM capacity. True False

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