importance of power quality

... and “translating” several types of power quality disturbances into the perspective of signal processing With visual inspection of the waveform or the spectra of disturbances, the success rate ... for power quality study,” IEEE Transactions on Power Delivery, vol 17, no 2, pp 544–549, 2002 [14] C H Lee and S W Nam, “Efficient feature vector extraction for automatic classification of power quality ... analysis of power system events,” IEEE Transactions on Power Delivery, vol 17, no 2, pp 423–428, 2002 [20] E Styvaktakis, Automating power quality analysis, Ph.D thesis, Chalmers University of Technology,...

Ngày tải lên: 22/06/2014, 23:20

... Handbook of Power Quality Handbook of Power Quality Edited by Angelo Baggini University of Bergamo, Italy Copyright © 2008 John Wiley & Sons Ltd, ... for the ith group of loads; PLi is the power of the ith group of loads; and PL is the total power of loads Analytical calculations are difficult because the contribution PLi /PL of a given load ... maintaining the condition of equality of generated power and demand Each disturbance of this balance, due to, for example, disconnection of a large generating unit or connection of a large load, causes...

Ngày tải lên: 14/08/2014, 11:07

... perceptions of audit quality Second, the findings of this study extend the scope of prior studies by examining the relative importance of audit team and audit firm attributes in perceptions of audit quality ... measure the relative importance of audit quality attributes, allows direct evidence to be obtained regarding the relative importance of attributes in perceptions of audit quality Literature Review ... users place greater importance on one type of attribute compared to the other Prior studies on perceptions of audit quality have identified the distinction between, and importance of, audit team and...

Ngày tải lên: 06/01/2015, 19:43

... Planning Division, Directorate of Plans, Hq USAF Library of Congress Cataloging-in-Publication Data Air power in the new counterinsurgency era : the strategic importance of USAF advisory and assistance ... warfare All of these instruments are designed to weaken and/or destroy the power and legitimacy of a ruling government, while at the same time increasing the power and legitimacy of the armed ... Risk of Instability: Risk Factors and Dynamics of Instability,” back- The Evolving Insurgency Challenge 17 the balance of power shifts ominously against ordinary civilians and in favor of armed...

Ngày tải lên: 06/03/2014, 20:20

... lagers close to soft water sources Typically the waters of Dublin are hard, those of Burton on Trent are high in calcium sulphate, and those of Pilsen (the home of clear lagers – are soft waters Water ... (monitoring of THMs, microorganisms, salts, ions) b) Quality control of pH, hardness, chlorine and micro organisms of incoming water – conducted by our laboratories c) Chlorination of incoming ... managed as follows: a) Boiling of water to remove temporary hardness b) Acidification of mash water (lactic acid) c) Addition of brewing salts to increase softness (addition of calcium chloride, or...

Ngày tải lên: 18/03/2014, 00:20

... Page of (page number not for citation purposes) Health and Quality of Life Outcomes 2009, 7:72 http://www.hqlo.com/content/7/1/72 Figure 2final model of predicting parental HRQOL of caregivers of ... file Predictive model of Health-related Quality of life in parents of chronically ill children: standardized Regression Coefficients and Percentage of Explained Variance of the Modified Model ... the Predictive model of Health-related Quality of life in parents of chronically ill children: standardized Regression Coefficients and Percentage of explained variance of the modified model...

Ngày tải lên: 18/06/2014, 19:20

... of power control-based CLDs In the following, we present a State -of- the-Art overview for power control-based CLDs in wireless ad hoc networks We exclusively focus on those CLDs that perform power ... first part of the frame is related to a contention phase and consists of several pairs of minislots Each minislot is divided into the transmission of an RTS and a CTS signal The second part of the ... Minislot Page of 13 Third Minislot Figure Power adaptation and backoff during the contention phase of the PBOA protocol MUD-based medium access A MUD functional principle In contrast to power control...

Ngày tải lên: 21/06/2014, 03:20

... computer engineering at The University of Texas at Austin His areas of interest include power quality, power electronics, renewable energy, and the application of novel digital signal processing ... Beaty, Electrical Power Systems Quality, McGraw-Hill, New York, NY, USA, 2nd edition, 2003 [2] T E Grebe, “Application of distribution system capacitor banks and their impact on power quality, ” IEEE ... analysis of power system transients,” IEEE Transactions on Power Delivery, vol 20, no 3, pp 2298–2306, 2005 I Y H Gu and E Styvaktakis, “Bridge the gap: signal processing for power quality applications,”...

Ngày tải lên: 22/06/2014, 19:20

... diagram of the detection technique of abnormal conditions more than one cycle of the fundamental component are used because the use of a large number of samples allows a better estimation of the ... development of signal processing techniques capable of decomposing the power line signals with reduced transient effect, the investigation of the proposed HOS-based technique to digital protection of power ... evaluation of a wavelet-based online voltage detection method for power quality applications,” IEEE Transactions on Power Delivery, vol 17, no 1, pp 161– 172, 2002 [6] D G Ece and O N Gerek, Power quality...

Ngày tải lên: 22/06/2014, 20:20

... increase the value of power quality monitoring as proposed in [4] There are two streams of power quality data analysis, that is, offline and online analyses The offline power quality data analysis, ... identification of conditions that need attention (ii) Evaluation of steady state power quality with respect to national and international standards Most of these standards involve specification of power quality ... function of the different types of power quality variations The information from power quality monitoring systems can help improve the efficiency of operating the system and the reliability of customer...

Ngày tải lên: 22/06/2014, 23:20

... non-metric quality variables of log i according I31,i : to Table I; Number of knobs per meter of log i (knobs/m); knobsi : Number of scars per meter of log i (scars/m); scarsi : Number of signs of “t-cancer” ... di : bark) of log i; Length in m of log i; li : I11,i I16,i : Indicators for non-metric quality variables of log i according to Table I; Indicators for non-metric quality variables of log i I21,i ... the importance of timber quality variables THEORETICAL APPROACH, HYPOTHESES AND STRUCTURE OF THE STUDY Before estimating parameters of price models on an empirical basis, the structures of the...

Ngày tải lên: 08/08/2014, 00:22

... the field of standardization, quality control, quality management system, environmental management It has formulated a plan which emphasizes on : Development of complementary level of standardization, ... simplification of the types and sizes of one product Qualitative: to assess fitness for purpose Methods of test: to provide a uniform, efficient and economic basis of comparison between products Methods of ... reduce the risk of accident • It sets a level of performance for products • They are a framework for quality processes • It reduces cost and saves money BENEFITS • Encapsulation of best practice...

Ngày tải lên: 10/08/2015, 16:35

... Role of Power  Rules for Using Power Role of Power  Power defined:  • Ability or official capacity to exercise control;  authority • Ability to influence or control others  Sources of Power ... Relationship between power &  dependence • Power A, B = Dependence B, A • Power of person A over B is equal to the  dependence of person B on A Rule #6: Power of Who You Know It’s not what you know but who you know ... Find the Soft Spot  Encourage others to open up • Gain disclosure of something private or  personal about your counterpart • Expression of trust  Identify true motivations and sources  of objections...

Ngày tải lên: 22/08/2012, 22:07

... our sample profile and that of both fast food restaurant profiles gives us a reasonable ground to conclude that our sample profile is a representative of the actual customer profile of both fast ... profile, when compared with the customer profile sample of both fast food restaurants, one check was carried out Our respondent’s demographic profile was compared with the customer profile of ... students of BTH who are customers of both restaurants We decided to use the student of BTH because from the customer profile of MacDonald and Max hamburger, customers between the age of 18 and...

Ngày tải lên: 24/09/2012, 17:19

... by an analysis of the circadian variation of detection of cardiac arrests and MET review activations Page of (page number not for citation purposes) Figure Scatter plot and line of regression ... exceeded the rate of MET review [22] Put simply, if the MET is a major method of prevention of SAEs on the ward, the rates of MET review should be similar to, if not greater than, rates of SAEs Available ... treatment may also affect outcomes of RRT review and represent an important component of dose Studies of RRSs that not deliver an adequate dose in terms of frequency of intervention and team composition...

Ngày tải lên: 25/10/2012, 10:06

... prevalence of gout in the USA ranges between 0.5–2.8% in men and 0.1–0.6% in women [2] The prevalence rises to 4.4% of men and 1.8% of women over the age of 65 [4] A two-fold increase in incidence of ... case of an isolated attack of gout in the wrist Acute onset of polyarticular gouty arthritis is more frequently seen in older patients most of whom are receiving diuretics for the management of ... dorsal aspect of his right wrist Range of motion was full with pain at end range of flexion and extension His health history included two hip replacements, two previous episodes of gout in both...

Ngày tải lên: 25/10/2012, 10:06

... presentation of the issues provides solace for researchers of varying points of view However, the nature of his critique is such that he does not offer a unitary, schemapiric view of food quality ... high quality foods are those which culinary experts believe are high quality. ’ The entire notion of expert judges for food quality smacks of the tertiary and archaic English definition of quality ... satisfactory QUALITY AS EXPERT OPINION This brings us to the traditional definition of quality, which is that quality is what experts say it is We would not ask the public to score the quality of the...

Ngày tải lên: 03/04/2013, 21:07

... definition of the terms related to quality concepts such as: quality management, quality management system, principle of quality management system, ISO 9001,etc 2.1.1 Quality Management Quality ... an aspect of managing function to determine and implement quality policy Quality management activity in quality field are known as quality management Quality management includes both quality control ... the role of leader as well as define the effect of human resource in applying these standard In term of practical aspect, it studies real situation of maintaining the efficiency of the quality...

Ngày tải lên: 18/04/2013, 17:09

... resort city of Da Lat § Construction of the map for good management of environmental quality in tourist areas including the city of Da Lat: § Distribution map of the tourist areas city of Da Lat ... Layers of information about ponds Layers of information on roads Layers of information about terrain Layers of information about population Layers of information about the area Layers of administrative ... approved Layers of information about the current status of air quality Layers of information on the state surface water quality Results mapping: Map showing the distribution status of tourism in...

Ngày tải lên: 25/04/2013, 08:21

... influence of these disturbances was found Some sampling points were selected They are the outlet of plant, the outside of experimental area, points of horizontal level and 0.5, 1.0, 1.5 m of vertical ... outlet of equipment Transparency[cm] 60 out of experimental area 50 40 30 20 10 10 15 20 25 30 35 40 45 50 Time[d] Figure Variation of Transparency Variation of COD concentration Variation of COD ... system, and the removal of nitrogen should be considered, too References [1] Department of Water Environment, Ministry of the Environment, Japan July 2002 Outline of Administration of Water Environment...

Ngày tải lên: 05/09/2013, 08:40