methods for correction of power quality problems

... (informative) Drawings, example of brake blocks Example of brake block design: — a steel base for mounting the brake and supporting the inner brake block; — a pair of brake blocks for ... convenience of users and does not constitute an endorsement For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, ... drawings of parts This annex gives requirements for the brake and also examples of brake designs C.1 Specification of brake device The requirements on the brake system are: — The size of the sockets

Ngày tải lên: 09/03/2024, 15:35

... measured axes of vibration ah arithmetic mean value of ahv values of runs for one operator for one hand m/s2 position m/s2 a h ahd arithmetic mean value of ahv values for all ... portable power tools — Test methods for evaluation of vibration emission — Part 2: Wrenches, nutrunners and screwdrivers 1 Scope This part of ISO 28927 specifies a laboratory method for measuring ... for the performance of type tests The structure/numbering of its clauses follows that of ISO 20643 The basic principle for transducer positioning first introduced in the EN 60745 series of European

Ngày tải lên: 09/03/2024, 15:35

... portable power tools — Test methods for evaluation of vibration emission — Part 5: Drills and impact drills ISO 28927-5:2009/Amd 1:2015, Hand-held portable power tools — Test methods for evaluation of ... type-test conditions and other requirements for the performance of type tests The structure/ numbering of its clauses follows that of ISO 20643 The basic principle for transducer positioning first introduced ... squares m/s2 ahv,3s of ahw values for the three measured axes of vibration m/s2 ahv,max arithmetic mean value of ahv values of runs for one operator for one hand position

Ngày tải lên: 09/03/2024, 15:35

... Proportionality constant for the inertial force Proportionality constant for the shear force Length of bed Expanded bed depth Filter yield Rate of mass inflow into bed Mass of cake per unit volume of filtrate ... Smutzdecke—Layer of dirt that collects on top of slow-sand filters Specific cake resistance—A measure for the resistance of a cake to filtration Uniformity coefficient—The ratio of the size of the sieve ... the temperature of filtration The value of c may be determined by performing an experiment of the particular type of sludge To determine α o , take the logarithms of both sides of Equation (7.67),

Ngày tải lên: 19/06/2014, 16:20

... capacity of the bed For ion exchangers, (X/M)ult has the units of milligram equivalents of solute exchanged per gram of exchanger material Length of active zone Pack density of ion ... interval of regeneration 3 16.7 Using a bed exchanger, 75 m of. .. concentration of NaCl is about 5 to 10% for an average of 7.5% This means that, for example, if the quantity of regenerant ... 0.0035 m For an interval 3 of regeneration of 8 h and assuming a rate of. .. that all of the cations were removed 3 16.9 Using a bed exchanger, 75 m of water per day is treated for

Ngày tải lên: 19/06/2014, 16:20

... range of less the 7.0; therefore, the optimum pH range for the formation... chloroform formation is enchanced at high pH To prevent formation of the chloroform, all that is necessary © ... concluded that before the dichloramine is formed, the gas must have already been forming, and that for the dichloramine to be formed, more HOCl is needed than is needed for the formation of the ... mass of chlorine to the mass of the disinfectant that has the same unit of oxidizing power as chlorine The unit of disinfecting power of chlorine may be found as follows in terms of

Ngày tải lên: 19/06/2014, 16:20

... regulation of the signal traffic is performed Computation blocks may be temporarily paused at times, either because of input signal unavailability, or because of the inability of the rest of the networks ... this graph The rate R of the cycle C is equal to T/L, where T is the number of tokens in the cycle, and L is the sum of latencies of the arcs of this given cycle The throughput of the graph is defined ... schedulings have been applied to software pipelining problems [10, 11], and later SoC LID design problems in [12] But these solutions pay in general little attention to the form of buffering elements that

Ngày tải lên: 22/06/2014, 19:20

... elements of a solution to the problems of simplification and validity. Four methods are compared on simulated data. METHODS The four methods considered rely upon the same information ... realization of S. Yi be the vector of the m performances of the ith sire’s progeny: Yi = (Y l, Ti!, Yi m ), and yi the vector of realizations of Y i. Ti the vector of order ... matrix for the fixed effects of the model, when the realization of the genotypes of the sire i progeny is ti. The Vi covariance matrix for the performances Y! of the

Ngày tải lên: 14/08/2014, 20:20

... methods is occurring despite the lack of testing standards for many of the methods. The development of testing standards is critical for proper appli- cation and expanded use of NDT methods for ... perform rapid, comprehensive assessments of existing construction; and • specification of NDT methods for quality assurance of deep foundations and concrete repairs. This increased use of ... information is given in ACI 437R. Nondestructive test methods are applied to concrete con- struction for four primary reasons: • quality control of new construction; • troubleshooting of problems

Ngày tải lên: 24/10/2014, 17:44

... g of CTAB + 0.15 mL of DDT at 120oC for 3 h, (g-i) with 0.05 g of CTAB + 0.37 mL of DDT at 120oC for 3 h, and (j-l) with 0.1 g of sodium citrate + 0.2 g of CTAB + 0.05 mL of ... evacuation of central SiO2-CTAB due to stress (3); (b) route (iii)  formation of micelle (1), deposition of SiO2-CTAB (2), and removal of soft templating. .. at 120oC for 4 h, (d-f) ... DEVELOPMENT OF SELF-ASSEMBLY TEMPLATING METHODS FOR ARCHITECTURE OF POROUS CORE-SHELL NANOCOMPOSITES WANG DANPING NATIONAL UNIVERSITY OF SINGAPORE 2010 DEVELOPMENT OF SELF-ASSEMBLY TEMPLATING METHODS

Ngày tải lên: 11/09/2015, 09:57

... equations The two finite methods focused are FDTD and FETD methods The applications of the developed hybrid methods are... the performance of their design ahead of physical prototyping ... Yeow Beng and Prof. Lim Hock of Temasek Laboratories, National University of Singapore for providing me the opportunity to pursue the doctoral program part-time at the Department of Electrical ... properties of electromagnetic fields and Maxwell’s equations. Finite methods are numerical techniques which seek solution of Maxwell’s equations in the differential form. The finite methods focused

Ngày tải lên: 14/09/2015, 11:39

... way for different forms of empirical functions. This chapter intends to describe the functional form of the force fields used for the study of proteins. In order to derive the empirical form of ... the area of ab intio methods of Protein Structure Prediction. As mentioned before, these problems often have been formulated as optimization problems to determine the lowest energy conformation. ... METHODS FOR MINIMIZATION OF POTENTIAL ENERGY FUNCTIONS OF POLYPEPTIDES MUTHU SOLAYAPPAN (M.S., University of Florida) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF

Ngày tải lên: 12/10/2015, 17:33

... INTERIOR-POINT METHODS FOR MINIMIZATION OF POTENTIAL ENERGY FUNCTIONS OF POLYPEPTIDES MUTHU SOLAYAPPAN (M.S., University of Florida) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ... a number of dipeptide structures of amino acids The dipeptide structures serve as a good starting point for testing the effi ciency of the proposed methods The ability of the solution methods ... the problem of molecular structure prediction Knowledge of molecular structure is essential for design of molecules for specific applications Examples of these types of applications

Ngày tải lên: 08/11/2015, 16:39

... however the very bad performance for class D4 CONCLUSIONS A significant amount of work has been done towards the development of methods for automatic classification of powerquality disturbances The ... 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 ... describing the deterministic and statistical classification methods for power system disturbances Two automatic classification methods for power quality disturbances are described: expert systems as...

Ngày tải lên: 22/06/2014, 23:20

... and out of the process in various combinations * Butterworth, 4th order, with cut-offfrequency of 15 Hz ** Butterworth, 4th order, with cut-off frequency of Hz Page of 11 (page number not for citation ... Several methods were used for evaluation of the success of extraction of the volitional EMG The basic one was by visual inspection of the approximated signal which, despite not providing information ... Despite the many methods for the elimination of the ESinduced component, providing the volitional only EMG component, most of them not provide an evaluation of the accuracy of the extraction...

Ngày tải lên: 19/06/2014, 10:20

... for the electrical conductivity of water The concentrations of these ions are very small At −7 25°C, for pure water, there is a concentration of × 10 mole per liter of the hydronium ion and of ... portions of the sample Each of these portions is inoculated into a set of five replicate tubes For example, for the 10-mL portion, each of five fermentation tubes is inoculated with 10-mL portions of ... concentration of coliforms using the Poisson distribution Nitrobacter—Genus of bacteria responsible for the conversion of nitrite-nitrogen to nitrate-nitrogen Nitrosomonas—Genus of bacteria responsible for...

Ngày tải lên: 19/06/2014, 16:20

... end of crest to gage point B = axial length of converging section C = width of downstream end of flume D = width of upstream end of flume E = depth of flume F = length of throat G = length of diverging ... considered to be the average of the “posof” and “negof” calculations Examples of quality parameters are BOD, suspended solids, total nitrogen, etc The calculation of the values of quality parameters should ... (Vremi−1,i) is the total value of the quality inside the tank at the end of the previous interval; thus, it is also the total value of the quality at the beginning of the forward interval (Ci + Ci+1)/2...

Ngày tải lên: 19/06/2014, 16:20

... operating performance of the pump Brake or shaft power The power of the motor or prime mover driving the pump Brake efficiency—Ratio of the power given to the fluid to the brake input power (brake power) ... that of the brake power in the form of the efficiency η, the similarity laws that we have developed also apply to the brake power, and figures such Figure 4.8 may be used for scaling brake powers of ... the pump At 20°C, Pv (vapor pressure of water) = 2.34 kN/m = 0.239 m of water Assume standard atmosphere of atm = 10.34 m of water Therefore, theoretical limit of pump cavitation = − (10.34 − 0.239)...

Ngày tải lên: 19/06/2014, 16:20

... because of formation of gases, makes solids rise resulting in inefficiency of the basin Thus, in practice, there is a practical range of values of 1.5 to 2.5 h based on the average flow for primary ... of combinations of the values of the elements of Vc[Xc] + Vu[Xc] can occur before the solids reach the critical section of the thickener This combination corresponds to the different speeds of ... the cross section of a grit removal unit consisting of four identical channels to remove grit for a peak flow of 80,000 m /d, an average flow 3 of 50,000 m /d and a minimum flow of 20,000 m /d There...

Ngày tải lên: 19/06/2014, 16:20

... pushing force This force along with the rising velocity creates the power of mixing It is evident that pneumatic mixing power is a function of the number of bubbles formed Thus, to predict this power, ... of the length of the paddle blades of the longest compartment to that of the length of the paddle blades of the middle compartment is 2.6:2, and the ratio of the length of the paddle blades of ... Projected area of paddle blade Sum of projected areas of paddle blades Length of paddle blade Coefficient of drag Width of paddle blade The diameter of the impeller Diameter of vessel Distance of impeller...

Ngày tải lên: 19/06/2014, 16:20