Results 161 to 170 of about 7,856 (197)

Alignment optimization in digital implantology: evaluating the role of scan body modifications and different software. [PDF]

BMC Oral Health
Bilgin Avsar D, Ertan AA.
europepmc   +1 more source

New flexible bidirectional converter for electric vehicle substations connecting microgrids. [PDF]

Sci Rep
Vinh NT, Nguyen VT, Van Dung N, Vu HS.
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THD analysis of a modulation technique applied for THD reduction

2013 Brazilian Power Electronics Conference, 2013
This work presents the THD analysis of the modulation technique previously described in [1]. The proposed technique showed an improvement in the power quality, reducing the total harmonic distortion in flying capacitor multilevel inverters, combining the advantages of two modulation techniques: HE-PWM and CSV-PWM.
Davi R. Joca, Luiz H. S. C. Barreto, Denercil de S. Oliveira, Paulo P. Praca, Ranoyca N. A. L. Silva, Gustavo A. L. Henn   +5 more
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An Alternative Approach for THD Assessment

2020 International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE), 2020
In a grid, electrical installations operate under strict conditions to power quality, such as low harmonic emission, a balanced three-phase voltage, stable frequency, and a voltage level at consumer buses. Harmonic emission, mostly caused by non-linear loads, may lead to different well-known negative effects.
Mikhail A. Ivanchenko, Dmitry V. Dvorkin
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Ancillary ligand effect on the properties of "Mg(thd)2" and crystal structures of [Mg(thd)2(ethylenediamine)]2, [Mg(thd)2(tmeda)], and [Mg(thd)2(trien)].

Inorganic chemistry, 2001
Complexes [Mg(thd)2(A)] (Hthd = 2,2,6,6-tetramethyl-3,5-heptanedione; A = ethylenediamine, en (2); N,N'-dimethylethylenediamine, dmeda (3); N,N'-diethylethylenediamine, deeda (4); N,N,N',N'-tetramethylethylenediamine, tmeda (5); diethylenetriamine, dien (6); triethylenetetra-amine, trien (7); 1,2-ethanediol (8)) and [Mg(thd)2(EtOH)]2(1,3-propanediol ...
T, Hatanpää, J, Kansikas, I, Mutikainen, M, Leskelä   +3 more
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Low THD variable load buck PFC converter

2008 IEEE Power Electronics Specialists Conference, 2008
International standards impose several constraints concerning the electric power quality and require that the harmonic content of the line current of grid connected equipment is below assigned limits; for this reason operating of ac-dc converters with high power factor and low line current distortion has become essential.
SOLERO, LUCA, V. SERRAO, M. MONTUORO, A. ROMANELLI   +3 more
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Intermolecular energy transfer between Tb(thd)3 and Eu(thd)3 complexes in solution

Journal of the Chemical Society, Faraday Transactions 2, 1977
Intermolecular energy transfer between Tb(thd)3 and Eu(thd)3 chelates (thd = 2,2,6,6-tetra-methyl-3,5-heptanedione) in a variety of solvents at room temperature is studied by both emission life-time and steady-state emission intensity techniques. Thirteen different solvents were examined, ranging from strongly coordinating dimethylsulphoxide (dmso) and
Harry G. Brittain, Frederick S. Richardson   +1 more
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Yttrium tetramethylheptanedionates: syntheses, crystal and molecular structures and thermal behaviours of Y(thd)3·H2O and Y(thd)3 (thd=tBuC(O)CHC(O)tBu)

Inorganica Chimica Acta, 1993
Abstract Y(thd)3(H2O) (I) has been prepared from yttrium nitrate via the aqueous method; its drying yielded Y(thd)3 (III). The sublimation of compound II, resulting from the reaction of yttrium isopropoxide with thdH, also yielded Y(thd)3. Compounds II and IlI have been characterized by elemental analysis, IR, 1H 13C{1H} and 89Y NMR spectroscopies ...
A. Gleizes, S. Sans-Lenain, D. Medus, N. Hovnanian, P. Miele, J.-D. Foulon   +5 more
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Vapour pressure and heat capacities of metal organic precursors, Y(thd)3 and Zr(thd)4

Journal of Crystal Growth, 2004
Abstract The vapour pressure of two metal organic precursors, Y(thd) 3 [CAS RN: 15632-39-0] and Zr(thd) 4 [CAS RN: 18865-74-2] (thd=2,2,6,6-tetramethylheptane-3,5-dionate), used for metal organic chemical vapour deposition of high-temperature superconductor layers, was measured by a static method in the technologically important temperature range ...
Michal Fulem, Květoslav Růžička, Vlastimil Růžička, Tomislav Šimeček, Eduard Hulicius, Jiřı́ Pangrác   +5 more
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Calibration of the thd functions of electrical standards

2008 Conference on Precision Electromagnetic Measurements Digest, 2008
The paper describes a test procedure, the test waveforms, and the reference equipment used to calibrate the voltage and current total harmonic distortion (THD) measuring functions of multi-function electrical standards. It also shows that it is possible to establish traceability to the SI units for the THD measurements by measuring the voltage and ...
Arseneau, R., Frigault, M., Zelle, J. J.
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