managing the performance of a data warehouse
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
... Muralikrishna M Gamma a high performance data ow database machine Proceedings of the International Conference on Very Large Data Bases, Kyoto, Japan, August 1986 Morgan Kaufmann: San Mateo, CA, ... 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 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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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
... 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 ... for the employment of machines with the rational performance Possibilities to determine the rational performance of machines are further discussed in this paper The objective of this paper was ... 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 in heterogeneous substance...
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Báo cáo hóa học: " A Proxy Architecture to Enhance the Performance of WAP 2.0 by Data Compression" ppt
Ngày tải lên :
23/06/2014, 00:20
... realistic networks using real WAP traffic Also, since WAP 2.0 has been newly released, there has not been any comparison of the performance of WAP 2.0 stack against WAP 1.x stack in the literature ... voice band modems [13], WAP requires the application of data compression over the wireless network at the wireless transaction layer in a manner that is transparent to the wireless data bearer ... schemes can be used when these applications or data are accessed over wireless networks While many standards exist for the compression of audio and video data [11, 12], and for data transmissions...
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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
... 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 ... temperature of the parallel combination Each flat plate collector has an area of 1.35m2 inclined at an angle equal to latitude of Chennai (13o) facing towards due south for the maximum year round performance ... is refined latent heat of vaporization of water at the condenser surface of last stage (J/kg), h fgNs is latent heat of vaporization of water at the condenser surface of the last stage (J/kg),...
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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
... 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 Economy (1999), authors ... 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 Design and Performance of a Real-time CORBA Event Service doc
Ngày tải lên :
19/02/2014, 18:20
... Proxies If data was not availHigh Level able to be pulled, the calling I/O Facade would need to block I/O Facade I/O Facade I/O Facade Abstraction awaiting a result In order for the I/O Facade to ... pull, the system must allocate additional threads to allow the application to make progress while the I/O Facade task is blocked However, 2: Demarshaled data adding threads to the system has many ... guaranteed that its deadline will be met, based on the published parameters of each schedulable operation One advantage of our approach is that operation invocations only pay the overhead of the C++...
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The Impact of a Corporate Culture of Sustainability on Corporate Behavior and Performance pptx
Ngày tải lên :
06/03/2014, 20:21
... Firms: A Model of Myopic Corporate Behavior Quarterly Journal of Economics 104: 655-669 Ullmann, A A 1985 Data in search of a theory: a critical examination of the relationships among social performance, ... element in the company’s assurance provision process Data Aggregation Review‖ is the percentage of companies that use a review of data aggregation processes as an element in the company’s assurance ... relevant data and constructs the Dow Jones Sustainability Index Once a year, SAM initiates and leads an independent sustainability assessment of approximately 2,250 of the largest corporations around...
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THE PERFORMANCE OF SOCIALLY RESPONSIBLE INVESTMENT FUNDS: A META ANALYSIS doc
Ngày tải lên :
30/03/2014, 12:20
... domicile of the funds) Australia Belgium Canada Europe France Germany Germany/Austria/Switzerland International Ireland Italy Japan Luxembourg Malaysia Netherlands Norway Singapore Sweden Switzerland ... The Performance of SRI Funds: A Meta-Analysis The Performance of Socially Responsible Investment Funds: A Meta-Analysis Sebastian Rathner* March 2012 Abstract Empirical studies, which analyse ... Conditional Matching Other PerforPerforperforprocedure of SRI of performance mance mance funds convenmance evaluation evaluation evaluation tional evaluCarhart’s Jensen’s funds ation Alpha Alpha Bauer,...
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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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báo cáo hóa học: " TCP NCE: A unified solution for non-congestion events to improve the performance of TCP over wireless networks" docx
Ngày tải lên :
21/06/2014, 02:20
... delay at time t n , L n the size of the data, t n-1 the arrival time of the previous ack, and tn the arrival time of nth packet at the receiver The sender interprets the estimated rate as the ... to 32 packets the size of an ack packet is same as the size of data packet We enabled the delay ack alogrithm DSR is the main routing protocol in our simulation with a maximum message buffer size ... of data and acks on each data packets and acks, respectively Upon the detection of out-oforder events, the sender can either disable the congestion response or trigger congestion avoidance algorithm...
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Báo cáo hóa học: "Research Article A Modified Run-Length Coding towards the Realization of a RRO-NRDPWT-Based ECG Data Compression System" pdf
Ngày tải lên :
21/06/2014, 05:20
... distribution of subband error The two mechanisms facilitate the significant normalization of subband data and a quantization scheme design with linear distortion characteristics EURASIP Journal on Advances ... compression performance Several experiments are also taken by using the MIT-BIH arrhythmia database [13] The rest of this paper is organized as follows The nonlinear quantization scheme with the approximate ... (4), QF can be an available variable for desired PRD and CR control In order to explore the linear control performance of QF, all 48 ECG signals recorded in the MIT-BIH arrhythmia database were...
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Báo cáo hóa học: " Research Article The Effect of a Voice Activity Detector on the Speech Enhancement Performance of the Binaural Multichannel Wiener Filter" ppt
Ngày tải lên :
21/06/2014, 08:20
... with attack and release time constants τraise and τdecay The differences between the maxima and minima are calculated to obtain the current dynamic range of the signal (4) The decision for a speech ... vectors containing speech samples will be added to the noise data matrix in (5), which leads to cancellation of parts of the speech signal On the other hand, if too many actual noise samples are detected ... concluded that the performance was as good as or better than that achieved with an adaptive directional microphone (ADM), a standard directional processing often implemented in hearing aids The algorithm...
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Báo cáo hóa học: " Research Article A Simulation Study: The Impact of Random and Realistic Mobility Models on the Performance of Bypass-AODV in Ad Hoc Wireless Networks" pdf
Ngày tải lên :
21/06/2014, 11:20
... Vmax ] Table shows the values of all parameters used in the simulation The following metrics are computed to evaluate the impact of each mobility model on the performance of the Bypass-AODV as ... Bypass-AODV Vehicular mobility models, FRW and MAN, are adopted to evaluate the performance of Bypass-AODV and then to compare it with AODV Initially, the nodes are placed on the freeway lanes ... Otherwise, the node makes a list of unreachable destinations consisting of the unreachable neighbor and any additional destinations in its local routing table that use the unreachable neighbor as the...
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Báo cáo hóa học: " Impact of the Gaussian Approximation on the Performance of the Probabilistic Data Association MIMO Decoder" pot
Ngày tải lên :
23/06/2014, 00:20
... Gaussian approximation, and therefore of the soft outputs, depends on the number of transmit antennas and on the cardinality of the symbol alphabet To our best knowledge, such an analysis of the ... influence on the quality of the soft outputs, and therefore the channel decoder has been investigated Furthermore, it has been illustrated that the main degradation of the performance of the PDA decoder ... [9] NUMERICAL RESULTS In order to illustrate the influence of the Gaussian assumption on the performance of the PDA decoder, an M × N Impact of the Gaussian Approximation Made in the PDA MIMO Decoder...
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Báo cáo khoa học: "Evaluation of the effect of a 3rd GnRH injection administered six days after the 2nd GnRH injection of Ovsynch on the reproductive performance of Japanese black cows" pps
Ngày tải lên :
07/08/2014, 20:24
... increased the total area of luteal tissue that was generated as a result of the formation of an accessory CL However, these changes did not improve the pregnancy rate in Japanese black cows 278 Abdurraouf ... Abdurraouf Omar Gaja et al Acknowledgments We are grateful to the staff of the IRIKI farm of Kagoshima University and the students at the theriogenology laboratory of Kagoshima University for their ... 3, there is a positive correlation between the cross-sectional area of the DF one day before ovulation and the cross-sectional area of luteal tissue on day 12 The DF of each group has been classified...
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báo cáo khoa học: " Evaluating the effectiveness of a tailored multifaceted performance feedback intervention to improve the quality of care: protocol for a cluster randomized trial in intensive care" pps
Ngày tải lên :
10/08/2014, 11:20
... e.g., their patient data management system Each month, participants upload their data from the local, electronic database to the central, electronic registry database ICUs in the intervention arm ... team must consist of at least one intensivist and one nurse; a management representative and a data manager are suggested as additional members To target the lack of motivation to change, team ... is available and includes data quality audits, support with data collection, and additional data analyses on request Furthermore, they are invited to a yearly discussion meeting where they can...
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Báo cáo sinh học: " A linear programming approach for estimating the structure of a sparse linear genetic network from transcript profiling data" pdf
Ngày tải lên :
12/08/2014, 17:20
... the class of linear models, the abundance value of a gene is treated as a weighted sum of the abundance values of other genes A high-dimensional transcript profile is a vector of abundance values ... is regulated often by a small number of other genes [3,4] so a reasonable representation of a network is a sparse graph A sparse graph is a graph parametrized by a sparse matrix W, a matrix with ... networks Analysis of the statistical and topological properties of learned LP-SLGNs may have practical value; for example, genes with high random walk betweenness, a measure of the centrality of a node...
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