high frequency power regulators for fluorescent lamps
design and analysis of high-frequency matrix converters for induction heating
Ngày tải lên :
13/11/2014, 06:49
... includes only one power switch However, for high power, it can cause significant imbalance to the utility supply In seeking an integrated, high performance solution for high power induction heating ... current to the high- frequency heating inverter For low -power systems, a slightly different topology, as depicted in Fig 1.6, can be used 11 Nam Nguyen-Quang High- frequency matrix converters for induction ... modulation is suitable for power control in this current-source topology, and two input power conditioning circuits for low and high powers are as described below Both frequency modulation, which...
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Báo cáo hóa học: " Research Article Nonlinear Frequency Scaling Algorithm for High Squint Spotlight SAR Data Processing" pdf
Ngày tải lên :
21/06/2014, 22:20
... range compression and the bulk range shift are performed by + Transforming (9) by the principle of stationary phase [9] for the azimuth Fourier transformation, we can obtain the range-Doppler domain ... fref = before the frequency scaling operation will simplify the expressions of HFS , HMF , and HAF SIMULATION RESULTS In order to evaluate the proposed algorithm, some simulations for an airborne ... should be shifted before being transformed into the range-Doppler domain The contour plot of the nine targets is shown in Figure The simulation results show that the nonlinear frequency scaling...
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/’ * DESIGNING MAGNETIC COMPONENTS FOR HIGH FREQUENCY DC-DC CONVERTERS Colonel Wm. T. ppsx
Ngày tải lên :
06/08/2014, 10:20
... transformers and inductors for high- frequency switchmode power converter circuits Many thanks, Colonel, for your contributions over the years to the art of magnetics design, and congratulations for ... Transformer regulation is copper loss I’cu divided by the output power I’o ~’ransformers normally dissipate heat from the surface of the component, Transformers today are designed for higher and higher ... While developed specifically for aerospace applications, the information has wider utility and can be used for the design of high frequency, small size, magnetics for appliances and computers...
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Báo cáo khoa học: "Predictive factors for beneficial application of high-frequency electromagnetics for tumour vaporization and coagulation in neurosurgery" pptx
Ngày tải lên :
09/08/2014, 07:21
... commercially available, high- frequency electromagnetic field (EMF) system has been demonstrated [12], and specific handling techniques and electrode tip configurations could be defined for optimal use ... the necessity for a systematic evaluation of benefits and shortcomings of this radiofrequency electrosurgical unit in order to define its place in the standard surgical armamentarium for tumor resection ... approaches were performed without modification of the surgical strategy for the purpose of this study; the EMF System was used as an adjunct or, at times, as a substitute for other instruments...
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Báo cáo y học: "High frequency of corticosteroid and immunosuppressive therapy in patients with systemic sclerosis despite limited evidence for efficacy" doc
Ngày tải lên :
09/08/2014, 13:22
... performed, however, only values below 0.0001 were considered significant For most variables, less than 5% of data were missing In some sets, however, the percentage of missing data is higher; for ... displaying the highest frequency (63.5%) (see Figure 1) Internal organ involvement was associated with varying degrees of corticosteroid use Lung fibrosis was associated with the highest frequency ... specialists who care for SSc patients are guided by current treatment practices for other autoimmune diseases when deciding for or against a therapeutic option The present study therefore underlines...
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Báo cáo y học: "High frequency chest wall oscillation for asthma and chronic obstructive pulmonary disease exacerbations: a randomized sham-controlled clinical trial" pptx
Ngày tải lên :
12/08/2014, 14:20
... considerations highlight the need for therapies that clear airways of mucus in the acute management of asthma and COPD [7-11] High frequency chest wall oscillation (HFCWO) creates high velocity, ... asthma and COPD, so no formal sample size calculations were performed Results of this study were intended to provide the information needed for sample size calculations for subsequent studies ... patients for written informed consent Inclusion criteria included admission to the inpatient medical service and evidence of airflow obstruction on spirometry (forced expired volume in second/forced...
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Báo cáo y học: "Pro/con clinical debate: High-frequency oscillatory ventilation is better than conventional ventilation for premature infants" pps
Ngày tải lên :
12/08/2014, 19:22
... during high frequency oscillatory ventilation Am J Resp Crit Care Med 1994, 150:1550-1554 McCulloch PR, Forkert PG, Froese AB: Lung volume maintenance prevents lung injury during high frequency ... neonatal, high- frequency, oscillatory-type ventilators Crit Care Med 1998, 26:1081-1088 13 Pillow JJ, Wilkinson MH, Neil HL, Ramsden CA: In vitro performance characteristics of high- frequency ... Group: High- frequency oscillatory ventilation for the prevention of chronic lung disease of prematurity N Engl J Med 2002, 347:633-642 12 Hatcher D, Watanabe H, Ashbury T: Mechanical performance...
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Báo cáo y học: " Allowing for spontaneous breathing during high-frequency oscillation: the key for final success" pptx
Ngày tải lên :
13/08/2014, 01:20
... work of breathing during high- frequency oscillatory ventilation: a bench study Crit Care 2006, 10:R23 Sessler CN: Sedation, analgesia, and neuromuscular blockade for high- frequency oscillatory ventilation ... of breathing during high- frequency oscillatory ventilation: a bench study Crit Care 2006, 10:R103 Rimensberger PC, Beghetti M, Hanquinet S, Berner M: First intention high- frequency oscillation ... allowing for unrestricted spontaneous breathing at any phase of the ventilatory cycle because of an integrated high- flow or demand valve CPAP system – it might be postulated that a new high- frequency...
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Báo cáo y học: "Threshold-free high-power methods for the ontological analysis of genome-wide gene-expression studies." pptx
Ngày tải lên :
14/08/2014, 07:21
... functionality for creating tables similar to Table (tab-delimited text or LaTeX format) and capability for rendering genecategory score-distribution plots similar to Figure (bitmap format) To correct for ... Additional data file 1, the detection power varied considerably between methods and between category types: First, all methods worked well for detecting high- proportion -high- effects categories (Figure ... some methods were better suited for detecting low-proportion -high- effects categories (Figure 2, lower right pie charts) whereas others were more apt for detecting high- proportion-low-effects categories...
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Extending si CMOS ingaas and gesn high mobility channel transistors for future high speed and low power applications
Ngày tải lên :
12/09/2015, 11:24
... Regions 1.3.2 Formation of High- Quality Gate Stack for InGaAs N-MOSFETs 1.3.3 Formation of High- Quality Gate Stack for GeSn P-MOSFETs 1.3.4 Surface Orientation Study for GeSn P-MOSFETs ... INGAAS AND GESN HIGH MOBILITY CHANNEL TRANSISTORS FOR FUTURE HIGH SPEED AND LOW POWER APPLICATIONS GONG XIAO A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY NUS GRADUATE SCHOOL FOR INTEGRATIVE ... not high enough for high- performance InGaAs N-MOSFETs [55] Other innovative solutions are necessary to boost the S/D doping level to address the S/D series resistance issues 1.3.2 Formation of High- Quality...
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A high frequency quad modulus prescaler for fractional n frequency synthesizer
Ngày tải lên :
16/09/2015, 12:42
... specification for frequency synthesizer 29 Table 4.2: PLL frequency synthesizer and operational mode register map 30 Table 4.3: Setting for order of MASH 39 Table 4.4: Settings for output ... current CMOS technology, it is easy to design high- frequency VCO but the prescaler remains as a major challenge in high- frequency synthesizer design [2] High- speed multi-modulus prescaler are more ... in Figure 3.2 This approach introduces lower jitter but higher power consumption due to high frequency operation of all registers, and higher loading on the clock to drive all registers simultaneously...
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AN INDUCTIVE POWER TRANSFER SYSTEM WITH a HIGH q RESONANT TANK FOR PORTABLE DEVICE CHARGING
Ngày tải lên :
22/09/2015, 15:19
... model for two coupled inductors 24 Fig 2.10 Equivalent T-circuit model for two coupled inductors 25 Fig 2.11 Circuit model for an ideal transformer 26 Fig 2.12 Circuit models for ... requirements for an IPT system for portable device charging applications are summarized as follows: 1) High efficiency: Power transfer efficiency is the most important parameter and determines the performance ... maximize the power transfer efficiency at the resonant frequency A frequency tracking unit is implemented in the primary circuit to tune the operating frequency following the varying resonant frequency, ...
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High frequency lumped parameter model for AC motor windings
Ngày tải lên :
23/06/2017, 08:18
... phase terminals at a high frequency Assuming star connected motor phases yields C = ( ) (;3(5,0(17$/ 7(676 In order to verify the proposed model for three-phase motor windings, frequency and time ... Mush Wound AC Windings for High Frequency Analysis,” 3URF ,6,( &RQI, July 1997, Guimarães (Pt) [8] A Consoli, G Oriti, A Testa, A.L Julian, “Induction Motor Modeling for Common Mode and Differential ... are function of the excitation frequency owing to skin and proximity effects However, in order to obtain an equivalent circuit which can be readily utilized for both frequency and time domain analyses,...
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Novel design of a compacted micro-structured air-breathing PEM fuel cell as a power source for mobile phones
Ngày tải lên :
05/09/2013, 14:58
... quite uniform This change for high current density, where a noticeable decrease takes place along the cell width of the electrode It can be seen that for a high nominal current density, a high fraction ... permeability for the gas phase (KP ) The relative permeability accounts for the reduction in pore space available for one phase due to the existence of the second phase [7] The momentum equation for ... the cell width of the electrode For optimal fuel cell performance, a uniform current density generation is desirable, and this could only be achieved with a non-uniform catalyst distribution, possibly...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Power supply for pulsed magnets with magnetic energy recovery current switch
Ngày tải lên :
15/10/2013, 16:11
... TURN-OFF SWITCHING LOSSES III HIGH REPETITION PULSED POWER SUPPLY A Pulsed Current in High Repetition This switch can be applied to a power supply which supplies high- speed and high- repetition pulsed ... advantageous to obtain high voltage of several times higher than that of one stage magnetic energy recovery switch And, it can be said that it is effective for the high repetition pulsed power supply by ... TAKAKU et al.: POWER SUPPLY FOR PULSED MAGNETS WITH MAGNETIC ENERGY RECOVERY CURRENT SWITCH Fig Turn-on waveforms of experimental results Fig 1795 Turn-off waveforms of experimental results...
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PLANNING AND DEPLOYING HIGH AVAILABILITY BROADBAND NETWORKS FOR MANAGED BUSINESS SERVICES
Ngày tải lên :
22/10/2013, 17:15
... point-to-point and a highavailability network ring The service allows for various and unique data protocols carried over an optical network As part of its deployment efforts for a global manufacturer ... of professional services specifically tailored for high- availability network ring deployments As a Cisco Systems’ Advanced Technology Provider for optical metro transport and metro DWDM, ADC ... information • Site directions • Customer deliverables • Task list/installation notes • Commissioning/provisioning sheets • Test data sheets • Diagrams for: - Cable racks - Fiber raceways - Power...
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LOW FREQUENCY IGBT CONVERTER FOR CONTROL EXCITING FORCE OF ELECTROMAGNETIC VIBRATORY CONVEYORS
Ngày tải lên :
03/01/2014, 19:15
... losses which become dominant at high frequencies This reduces the efficiency of the EVCD and power losses in the converter are often higher than the power required for maintaining the resonant oscillatory ... (a)-unidirectional, (b)bidirectional Principle of amplitude -frequency control means actuating force is given on the block diagram in Fig.5 A high performance exciting force control of EVCD requires a detailed ... Another type power converter- bidirectional with AC output current, using full period of mains voltage They are implemented with triacs or ant-parallel connection of thyristor for higher power application,...
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Tài liệu High frequency word GRE doc
Ngày tải lên :
17/01/2014, 05:20
... fervid fervor fidelity finesse flamboyant flippant florid flout foible foment foppish forbearance forfeit forgery forswear fragile frantic frugal fugacious fulminate fulsome gainsay gamut garrulous ... interrogatories and reduced to writing, for use as evidence in court To render bad, especially morally bad To express disapproval or regret for, with hope for the opposite To ridicule Ridicule ... mention, for the first time Full of offensive and aggressive self-conceit Having the power or tendency to float or keep afloat To make brilliant or shining A number of persons secretly united for...
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Tài liệu BUILDING HIGH AVAILABILITY BROADBAND NETWORKS FOR VALUE-ADDED SERVICE DELIVERY ppt
Ngày tải lên :
24/01/2014, 12:20
... success for your HABN project We've completed more than 20 successful HABN ring deployments for a large U.S.based Tier carrier, making us one of the most experienced systems integrators for HABN ... specifications for each project The final document in the engineering phase is ADC's Ring Design Package (RDP), which contains all the engineering information about the ring Used for maintenance ... association • Baseline fiber characterization/equipment power- level information that shows the data from the fiber characterization and initial equipment power levels • Commissioning and integration test...
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Báo cáo khoa học: Synthesis and characterization of a new and radiolabeled high-affinity substrate for H+/peptide cotransporters pdf
Ngày tải lên :
07/03/2014, 05:20
... constants for peptide transporters are only in the medium range, with Kt values of 1.3 mm for PEPT1 [17] and 108 lm for PEPT2 [18] New high- affinity labeled probes are required for further ... dipeptides could enhance the affinity of many derivatives for binding to the transporters Besides high affinity, a second important requirement for any peptide transporter substrate is a sufficient ... FEBS 5909 Labeled high- affinity substrate for peptide transporters I Knutter et al ¨ amounts of substrate (1 or 20 mm, respectively) and subtracted from the total uptake rates For both substrates,...
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