intelligence events and real time data

... labour-intensive method and therefore, rather expensive and time consuming On the other hand, web-based questionnaires are inexpensive and responses can be recorded directly into a data file However, ... Schwarz N: Retrospective and Concurrent Self-Reports: The Rationale for Real- Time Data Capture In The Science of Real- Time Data Capture Edited by: Stone AA, Shiffman S, Atienza A, Nebeling L Oxford: ... 10.1186/1746-1340-18-10 Cite this article as: Johansen and Wedderkopp, Comparison between data obtained through real- time data capture by SMS and a retrospective telephone interview Chiropractic...

Ngày tải lên: 13/08/2014, 14:20

... analysis of audio and video and arbitrary view and sound synthesis to encoding of 3D audio and video Understanding of real- time implementation issues, as well as system architectures and network aspects ... 11 Coding and Standardization by A Smolic and T Sikora outlines the basic coding strategies frequently used for audio, image and video storage and transmission International coding standards such ... the internet via a camera and where remote users could control a robotic arm to plant and water seeds, and subsequently watch their plants grow and flourish in real- time 1.6 TELECOMMUNICATIONS...

Ngày tải lên: 12/05/2013, 10:21

... real- time databases, including temporality, predictability, and specialization A temporal database is a real- time database Although temporal databases and real- time databases both support time- specific ... for real- time databases Integration of active and real- time databases Real- time systems are inherently reactive—they must respond to external events in the environment as well as internal events ... Algorithms for Real- Time Systems,” Real- Time Systems J., Sept 1991, pp 307-336 10 G Ozsoyoglu and R Snodgrass, “Temporal and RealTime Databases: A Survey,” IEEE Trans Knowledge and Data Eng., Aug...

Ngày tải lên: 23/03/2014, 12:20

... Harmonics Analysis and Real Measurements Data Crectifier and Cac_cable are the capacitive couplings of the rectifier side and underground cable, respectively, with ground Rac_cable and Lac_cable make ... between wind farm electric circuit and ground and (b) FFT analysis of the ground current obtained 274 Power Quality Harmonics Analysis and Real Measurements Data 800 Capacitive cooupling model ... shown in Fig 11 272 Power Quality Harmonics Analysis and Real Measurements Data 0.050 Voltage (kV) 0.025 0.000 -0.025 -0.050 2.000 2.005 2.010 Time (s) 2.015 2.020 Magnitude (% of fundamental component)...

Ngày tải lên: 18/06/2014, 22:20

... Identification and Measurements Soliman Abdelhady Soliman and Ahmad Mohammad Alkandari Chapter On the Reliability of Real Measurement Data for Assessing Power Quality Disturbances 69 Alexandre Brandao ... to recorded data and used to determine which data are to be used for further processing, and which data should be discarded Chapter presents the problems of voltage transformers and voltage harmonic ... Quality Harmonics Analysis and Real Measurements Data Sources and problems of harmonics [2] Harmonic sources are divided into two categories: Established and known New and Future A review of the...

Ngày tải lên: 19/06/2014, 08:20

... and varied These parameters are the standard 14 Power Quality Harmonics Analysis and Real Measurements Data deviation of the noise, the number of samples, and the sampling frequency A Gaussiandistributed ... and discrete Fourier transform (DFT) The data used in this study are real data from a three-phase six pulse converter The three techniques are thoroughly analyzed and compared in terms of standard ... calculated using data taken from t = t1 to t = t1 + (m – 1)t s, t1 is the initial sampling time The elements of the matrix [A] are functions of the time reference, initial sampling time, and the sampling...

Ngày tải lên: 19/06/2014, 08:20

... Analysis and Real Measurements Data Fig 27 Gain of the proposed filter for X1 and Y1 using models and Fig 28 Estimated magnitudes of 60 Hz and third harmonic for frequency drifts using models and ... transients, and harmonics of less than 60 Hz (sub-harmonics) The waveform was originally sampled at a 118 ms time 34 Power Quality Harmonics Analysis and Real Measurements Data interval and a sampling ... current and voltage waveforms This package has been tested on simulated data sets, as well as on an actual Electric Power Systems Harmonics - Identification and Measurements 31 recorded data set and...

Ngày tải lên: 19/06/2014, 08:20

... the amplitude and phase angles of each harmonic component are time independent, steady state harmonics identification 54 Power Quality Harmonics Analysis and Real Measurements Data Fuzzy harmonic ... at frequency 1250Hz and used as measurement samples Converting Eq (88) to discrete time, t  0.08k, where k is the sampling time, and using the notation of Eq (71), v1(k) and v2(k) are defined ... Systems Research 38 (1997) 113-123 66 Power Quality Harmonics Analysis and Real Measurements Data S.A Soliman, I Helal, and A M Al-Kandari, Fuzzy linear regression for measurement of harmonic components...

Ngày tải lên: 19/06/2014, 08:20

... determination problem and sections and present two case studies Section presents general conclusions and recommendations Data reliability criteria This section is intended to present the main data reliability ... resistance data showing confidence intervals 74 Power Quality Harmonics Analysis and Real Measurements Data 2.5 Quantization error Quantization refers to the digitalization step of the data acquisition ... equivalent impedance of the transmission and distribution lines, and of the step-down and step-up transformers On the Reliability of Real Measurement Data for Assessing Power Quality Disturbances...

Ngày tải lên: 19/06/2014, 08:20

... cut-off frequency few times 102 Power Quality Harmonics Analysis and Real Measurements Data Capacitive character of VT load induces opposite effect and narrows VT pass band width significantly ... Analysis and Real Measurements Data Simplified representation of VT magnetizing and leakage impedances is presented in Fig 13, where characteristic resonance frequencies fr1, fr2, fr3 and related ... is predominant Band Band Band Zmag Zleak fr1 fr3 fr2 log f Fig 12 Simplified representation of VT magnetizing and leakage impedance-frequency characteristics The developed wideband circuit model...

Ngày tải lên: 19/06/2014, 08:20

... stages 1,2 and or 5,6 and The transistors conduct for the time of stages and 5, the freewheeling diodes – for the time of stages 3, 4, and 8, and the rectifier diodes – for the time of stages and The ... Quality Harmonics Analysis and Real Measurements Data Stages and correspond to the commutations in the inverter 0 0 The commutations in the rectifier begin in p M1 or p M5 and end in p M or p M8 ... limited within the boundary curves А and L3 or L4 The bigger the capacity of the capacitors 124 Power Quality Harmonics Analysis and Real Measurements Data СS and С0, the smaller this area is However,...

Ngày tải lên: 19/06/2014, 08:20

... of 60, 90 and 1200 el., and load inductance values of 0.1, 10 and 50mH The results are shown in Fig 20 and Fig 21 750V P1 500V P2 250V P3 0V 0s 20ms V(MULT1:OUT) 40ms 60ms 80ms 100ms Time Fig ... simulations we obtain the maximum temperature time variation and the minimum temperature time variation From the difference between maximum temperature time variation and ambient temperature divided to ... made with power diodes and thyristors, the time variations of input powers and temperatures are presented below P1 375V P2 250V P3 125V 0V 0s 20ms V(MULT1:OUT) 40ms 60ms 80ms Time Fig 11 Input power...

Ngày tải lên: 19/06/2014, 08:20

... But with the development of power system, more and more highpower nonlinear loads are connected to higher voltage grid and the demand of high voltage and high capacity keeps being enlarged The paper ... principle and the theory about the high power UPQC, some fundamental knowledge about harmonic and harmonic elimination equipments are list below 154 Power Quality Harmonics Analysis and Real Measurements ... in different forms and form many types of HAPF Because of its low cost, HAPF attracts more and more eyes and has been developing very quickly 2.3 UPQC: Combined shunt APF and series APF Unified...

Ngày tải lên: 19/06/2014, 08:20

... (Task 180 Power Quality Harmonics Analysis and Real Measurements Data force on Harmonic Modeling and Simulation, 2003), and |ZP1| and λP are the magnitude and the displacement power factor of the ... systems are • Parallel resonance: kr, a = 4.94 and 7.05 (τ1 = and dC = 1.0 and 0.5, respectively) and kr, a = 5.13 and 7.33 (τ1 = 6.0% and dC = 1.0 and 0.5, respectively) Characterization of Harmonic ... Power Systems 187 Series resonance: kr, a = 4.95 and 7.03 (τ1 = and dC = 1.0 and 0.5, respectively) and kr, a = 6.16 and 8.74 (τ1 = 7.9% and dC = 1.0 and 0.5, respectively) From these results, it...

Ngày tải lên: 19/06/2014, 08:20

... 190 Power Quality Harmonics Analysis and Real Measurements Data corresponding to the above data are rL = 27.4, λL = and 0.95 (Cases and 2, respectively) and τ1 = 6.1.2 Experimental measurements ... Harmonics Analysis and Real Measurements Data the current and consequently the resistive power loss The heat also remains in the surrounding air and affects the transformer lifetime In the delta-wye ... medical and hospital devices 196 Power Quality Harmonics Analysis and Real Measurements Data In this chapter we review our novel approach for studying the effect of switch mode devices and present...

Ngày tải lên: 19/06/2014, 08:20

... buildings and monitor and check harmonics at different loading processing modes and times  Recommendation and findings are to be clearly drawn out of results and stressing the mode of operations and ... neighbour’s facility and vice versa Electric utilities have recognized this problem and are adopting standards, like the Institute of Electrical and Electronics Engineers (IEEE) Standard 519 which ... This standard is designed to protect both businesses and utilities, many other standards are also available and set limits for such harmonic penetration Harmonic analysis, load flow analysis, and...

Ngày tải lên: 19/06/2014, 08:20

... voltages and currents, K factor for current, voltage and current unbalance, power factor and displacement factor, extreme and average values for voltage and current, peak factors for current and voltage ... efficiency and increased footprint Harmonic filters can be added post-installation but further installation costs and downtime need to be planned for 232 Power Quality Harmonics Analysis and Real ... voltages and TRMS AC line currents; peak voltage and current; active, reactive and apparent power per phase; harmonics for voltages and currents up to the 50th order (CA8334, technical handbook,...

Ngày tải lên: 19/06/2014, 08:20

... and i2(t) are the current of mesh and mesh 2, respectively, vin(t) is the injected voltage by the converter, v2(t) the voltage at node and vpv(t) is the voltage between PV module and ground and ... values of phase voltages and currents, total harmonic distortion of phase voltages and currents, power factor and displacement factor per phase 1, active power, reactive power and apparent power per ... Harmonics Analysis and Real Measurements Data Fig 19 RMS values of the currents in the cold state (MV Line) Fig 20 THD of line currents in the cold state (MV Line) Fig 21 DPF and PF per phase in...

Ngày tải lên: 19/06/2014, 08:20

... both severe and nonsevere shadowing conditions in flat fading conditions The impact of using lower power (lower modulation and larger bandwidth) versus lower bandwidth (higher modulation and higher ... sector to isolate the effects of interference, using real- time data models [11] Both severe and nonsevere shadowing environments are simulated and the same performance trend is observed The remainder ... base-station and j is the index of the jth user, and ri j is jth user’s distance from the ith base station Let Dik be the distance and φik be the angle between base-station i and base-station k, and R...

Ngày tải lên: 22/06/2014, 22:20

... Identification and Measurements Soliman Abdelhady Soliman and Ahmad Mohammad Alkandari Chapter On the Reliability of Real Measurement Data for Assessing Power Quality Disturbances 69 Alexandre Brandao ... and varied These parameters are the standard 14 Power Quality Harmonics Analysis and Real Measurements Data deviation of the noise, the number of samples, and the sampling frequency A Gaussiandistributed ... Analysis and Real Measurements Data Fig 27 Gain of the proposed filter for X1 and Y1 using models and Fig 28 Estimated magnitudes of 60 Hz and third harmonic for frequency drifts using models and...

Ngày tải lên: 26/06/2014, 23:20