the performance of a 34 mimo ofdm system

Báo cáo lâm nghiệp: "Rationalization of the performance of a mobile off-road system working in the forest environment with respect to its emission load" doc

Ngày tải lên : 07/08/2014, 10:21

... (material flows processed by the logging and transport systems), resulting from the changed performance of the system, not always cause a change in power and material consumption and thus a change ... performance The most important measures compensating the environment contamination by extraneous substances are preventive measures that can be applied on a larger part of the area of endangered ... substances) of work of the production system is valid in general The thesis has been confirmed by the practical analysis of work of the mobile system mentioned above in dependence on the rate of its...

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Báo cáo hóa học: " Testing the potential of a virtual reality neurorehabilitation system during performance of observation, imagery and imitation of motor actions recorded by wireless functional nearinfrared spectroscopy (fNIRS)" potx

Ngày tải lên : 19/06/2014, 08:20

... palms facing downwards, and faced the monitor at a distance of approximately 70 cm The image on the monitor showed a virtual arm in the same orientation and relative position as the real arms, ... http://www.jneuroengrehab.com/content/7/1/57 Page of 13 the analysis The median was chosen instead of the mean as it is more robust to outliners that may have statistically unbalanced the analysis in our relatively ... hemisphere: diagram of the Δ[O2Hb] amplitude changes with standard error of the mean (SEM) and statistical significances of paired t-test are shown perhaps because they are less ‘automatic’ It has been...

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PERFORMANCE OF A COMBINED CONSTRUCTED WETLAND SYSTEM FOR TREATING VILLAGE SEWAGE IN LAKE DIANCHI VALLEY

Ngày tải lên : 05/09/2013, 08:40

... season, and the flux was big and the pollutants concentration was low in the rain season (from May to October) The data from the local weather station showed that the average annual rainfall and evaporation ... order to make full use of the land advantage to strengthen ecological and scenical effect of ecological system The area was 2000 m2 and hydraulic loading rate was 4cm/d in the free-surface constructed ... adopted to treat a typical village sewage There is the long rain season in local place always accompanied with strong storms at the beginning The stormwater runoff not only brings the large amounts...

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Experimental study on the performance of a prism-shaped integrated collector-storage solar water heater

Ngày tải lên : 05/09/2013, 15:28

... water ascends to the top of the tank It is originated from the fact that, after gaining heat from the solar radiation, the tank wall heats a thin vertical layer of water along the tank wall Part ... function of the density, specific heat capacity and the initial and massweighted average temperatures of water; with all the values, apart from the mass-weighted average temperature, are the same ... solar radiation and average temperature of the present experimental study and the theoretical results of [1] in January Figure 12 The time variation of solar radiation and stored energy of the...

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Measuring and modelling the performance of a parallel ODMG compliant object database server potx

Ngày tải lên : 17/03/2014, 00:20

... through a declarative query language are Objectivity/DB, GemStone and O2 A commercial parallel database management system is Teradata [37], which is a relational database system Teradata runs on a ... performance of various features of database systems The 007 database has been designed to test the performance of object database systems, in particular for analysing the performance of inter-object ... Shore as a storage system Some of the advantages of Polar over most of the mentioned systems are itemized as follows • Use of a standard data model: Polar adopts a standard object data model, the...

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Báo cáo khoa học: "SOFTWARE TOOLS FOR THE ENVIRONMENT OF A COMPUTER AIDED TRANSLATION SYSTEM" pptx

Ngày tải lên : 17/03/2014, 19:21

... directly accessed on the screen But the translation is always done by the translator This data base is composed of dictionaries, "formats" and "procedures" of the analysis, transfer and synthesis phases ... phases (the conventional phases of a CAT system) For any given source lexical unit in this data base, VISULEX searches for all the associated information THAM consists of a set of functions programmed ... help translators in several ways, particularly with Machine Aided Human Translation (MAHT) The translator is provided with a text editing system, as well as an uncoded dictionary which may be...

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**Báo cáo khoa học: "Current Research in the Development of a Spoken Language Understanding System using PARSEC*" ppt**

Ngày tải lên : 23/03/2014, 20:20

... feedback about impossible word candidates • We have been able to incorporate the durational information from Bear and Price quite easily into our framework An advantage of our approach is that the ... incremented by this amount In contrast, Bear and Price, by doubling the size of the grammar are multiplying the processing time by a factor of when no prosodic information is available (assuming (2n) ... Harper Parsec: An architecture for parallel parsing of constraint dependency grammars In Submitted to The Proceedings o /the ~9th Annual Meeting o.f ACL, June 1991 [3] H Maruyama Constraint dependency...

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Báo cáo hóa học: " Research Article Impact of LQI-Based Routing Metrics on the Performance of a One-to-One Routing Protocol for IEEE 802.15.4 Multihop Networks" docx

Ngày tải lên : 21/06/2014, 11:20

... the calculation of the cost of a path, based on the LQI values of all links Therefore, we chose to evaluate the performance of these LQI-based routing metrics for NST-AODV Note that the PATH-DR ... packet were obtained at each of the remaining motes The LDR was calculated for all the receivers The same procedure was repeated three times, and the sender was placed at each of the other three ... including the LQI of lost packets [19] 6.2 Variability of the LQI of a Link Figure depicts the standard deviation of the LQI against the average values of LDR (%) EURASIP Journal on Wireless Communications...

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Improving the performance of a high power, lead–acid battery with paste additives docx

Ngày tải lên : 05/07/2014, 20:21

... that simulate the conductivity of the positive active material and the diffusion of sulfate ions Researchers w15,16x have found that after a certain amount of the active material has reacted the ... remaining material becomes isolated and cannot react The amount of active material that can be discharged before the remaining material becomes isolated is termed the critical volume fraction Values ... cell discharge was simulated Table gives the performance of this battery at a discharge rate of 18 Wrkg, approximately the 2-h rate The model predicts a discharge energy of 150 W h and a specific...

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Study of technical feasibility and the payback period of the invested capital for the installation of a grid connected photovoltaic system at the library of the technological federal university of paraná

Ngày tải lên : 09/09/2015, 10:32

... [17] has found a difference of 5,5% between annual average daily irradiation obtained at the weather station INMET and database SWERA To conclude, this paper considered 5,5% of the annual average ... Situated at the Solar Energy Laboratory – LABSOLAR, at the UFSC (Federal University of Santa Catarina), there is the first Grid-connected Photovoltaic System of Brazil, with a total implanted ... until the result was the amount of capital invested in the project n ∑ RFATi (2) i where i is the year; RFAT the annual financial return of the year i Logically, the weekly financial return was calculated,...

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On the performance of multicarrier CDMA (MC CDMA) systems with transmit diveristy

Ngày tải lên : 27/11/2015, 11:26

... vertical polarized antenna The field incident on the antenna is assumed to comprise arbitrary azimuthal angles of arrival, and each waveform has equal average amplitude with unresolvable delay The ... As a result of such time variations, the nature of the multipath varies with time The time variations appear to be unpredictable to the user of the channel Therefore, it is reasonable to characterize ... is approximately the reciprocal of the maximum Doppler shift, the rate of fade can therefore be measured by the f d Tb , called normalized Doppler frequency A fast fading channel will have a large...

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A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems

Ngày tải lên : 20/11/2012, 11:28

... describes the basic OFDM system model and MIMO system model The wireless channel model, the principles of OFDM and MIMO systems, the combination of MIMO and OFDM, that is, MIMO- OFDM system is also ... variance of OFDM system capacity for the number of channel paths L = 2, 4, and 8, over the Rayleigh fading channel 163 Fig 6.5 The variance of OFDM system capacity versus the CP of an ... Peak-to-Average (PAR) of OFDM systems 30 2.2.3 Channel estimation for OFDM systems 33 2.2.4 Synchronization of OFDM systems 38 2.2.5 Advantages and disadvantages of OFDM systems...

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Optimization of design and operating parameters on the year round performance of a multi-stage evacuated solar desalination system using transient mathematical analysis

Ngày tải lên : 05/09/2013, 16:11

... performance and thermal characteristics of the system Description of the multi-stage evacuated solar desalination system The Multi-stage evacuated solar desalination system is a combination of ... 5.1 Variation of global solar radiation and ambient temperature The year round global solar radiation and ambient temperature data for Chennai is taken from [34] Figure shows the variation of global ... performance Each evaporator and condenser tray has an area of 1m2 inclined at an angle of 16o (a) (b) Figure Coupling of Multi-stage evacuated solar desalination system to flat plate collectors; (a) ...

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Exact modeling of multiple access interference, ber derivation and a method to improve the performance of UWB communication systems

Ngày tải lên : 05/10/2015, 22:04

... derivations are either approximate or pulse shape dependant or semi analytical and hence not exactly model the MAI for an arbitrary pulse shape In [34] , the modeling of the ancillary variable [34, ... comparison for the DS-PAM system 34 performance In all the above cases the theoretical and simulation BER matches exactly This validates our theoretical derivations The simulations consider an AWGN ... information successfully In fading channels, where the instantaneous SNR is a random variable, the average SNR is used as the measure Another standard measure in fading channels is the outage probability,...

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The Design and Implementation of a Log-Structured File System

Ngày tải lên : 12/09/2012, 15:05

... purpose The separate data area of these database systems means that they not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space The space occupied by the log in a database system ... log as the most up to date ‘‘truth’’ about the state of the data on disk The main difference is that database systems not use the log as the ﬁnal repository for data: a separate data area is reserved ... has the disadvantage of increasing the amount of data lost during a crash For this paper we will assume that crashes are infrequent and that it is acceptable to lose a few seconds or minutes of...

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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System

Ngày tải lên : 12/09/2012, 15:05

... dirty pages • Data manager floods the cache This is rather similar in nature to a data manager which fails to free data, but is easier to detect and prevent • Data manager changes data A malicious ... for another thread in that task • Server tasks which cannot tolerate changing data, or which must ensure that all of the necessary data is available, may use a separate thread to copy that data ... copied) data in a message • Data manager backs its own data Deadlock may occur if a data manager becomes blocked in a page fault waiting for data which it provides Fortunately, there are several techniques...

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List the components of a radio system

Ngày tải lên : 13/09/2012, 10:52

... – Advantages • Can carry up to three times the amount of data as TDMA • Transmissions are much harder to eavesdrop on • A would-be eavesdropper must also know the exact chip in which the transmission ... data to be sent – Imprints a unique address on the data – The longer the code is, the more users will be able to share the same channel – Number of chips in the code • Determines the amount of ... Objectives • List the components of a radio system • Describe how different factors affect the design of a radio system • Explain the radio frequency spectrum Components of a Radio System • Components...

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Tài liệu HOW TO MEASURE THE IMPACT OF A CRM STRATEGY ON THE FIRM PERFORMANCE doc

Ngày tải lên : 20/12/2013, 17:15

... information systems and data warehouses been able to manage a great deal of data The challenge is to capture and measure soft and qualitative information For example, in the book The Experience ... 1994) Skandia Navigator (Edvinsson and Malone, 1997) Value Chain Scoreboard (Lev, 2002) Description of measure Sets of human capital indicators are collected and bench-marked against a database Similar ... mirrors the myriads of interactions taking place in a company and the value created in each of them The problem is not the amount of relationships since firms have the help of sophisticated information...

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Tài liệu THE ROLE OF UNIVERSITIES IN REGIONAL INNOVATION SYSTEMS - A NORDIC PERSPECTIVE pdf

Ngày tải lên : 16/01/2014, 16:33

... (UHÄ) The location of the general study programmes and the admission capacity of each of these were decided by the Government and Parliament on the basis of material from UHÄ Also, most of the ... universities’ latest major proclamation the Magna Charta signed in Bologna 1988 Autonomy and freedom of research as stated in the universities’ Magna Charta are consequently the University of Aarhus’ official ... education and research in the global marketplace Today there are 23 500 staff at public Norwegian universities and colleges On average the academic staff makes up about half of total staff Funding of...

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Tài liệu Báo cáo khoa học: The chitinolytic system of Lactococcus lactis ssp. lactis comprises a nonprocessive chitinase and a chitin-binding protein that promotes the degradation of a- and b-chitin doc

Ngày tải lên : 18/02/2014, 08:20

... Vaaje-Kolstad et al containing 100 lm of (GlcNAc)14 was analysed at the start, in the middle and at the end of each series of samples The resulting average values of the standards (displaying standard ... instructions, containing ends compatible with the expression vector (forward primer, 5Â-GGTATTGAGGGTCGCCATGGTTATGTTC AATCACCA-3Â; reverse primer, 5Â-AGAGGAGAGTTAG AGCCTTACAAGAAGGGTCCAAAGA-3Â) The PCR product ... regular time intervals The degradation of a- chitin by LlChi1 8A started with a rapid phase, regardless of the presence of LlCBP3 3A In the presence of LlCBP3 3A, the fast initial phase was maintained...

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