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Now showing items 181-190 of 261
A high precision resolver-to-DC converter
(
IEEE
, 2005 , Article)
A newly developed resolver converter, providing a pseudolinear voltage proportional to the shaft angle, is presented. This converter is based on a new concept involving the absolute values of the demodulated sine and cosine ...
A novel method for estimating the angle from analog co-sinusoidal quadrature signals
(
Elsevier
, 2008 , Article)
The paper presents a new low cost and accurate method for determining the angle from sine and cosine signals produced by resolvers and sinusoidal encoders. In the proposed scheme, multiple phase-shifted sinusoids (PSS) are ...
A novel multilevel carrier-based PWM-control method for GTO inverter in low index modulation region
(
IEEE
, 2006 , Article)
Gate turn offs (GTOs) have an inherent minimum ON-OFF time, which is needed for their safe operation. For GTO-based three-level or neutral-point-clamped (NPC) inverters, this minimum ON-OFF pulsewidth limitation results ...
Role of catalyst type in the selective separation of olefinic and paraffinic hydrocarbons using xerogel-based adsorbents
(
Elsevier
, 2008 , Article)
Resorcinol-Formaldehyde (RF)-based activated carbon xerogels are typically synthesized using a homogeneous, sodium-based, catalyst solution. In this work, the synthesis of RF-based carbon xerogels using other, non-typical, ...
A cascade of artificial neural networks to predict transformers oil parameters
(2009 , Article)
In this paper artificial neural networks have been constructed to predict different transformers oil parameters. The prediction is performed through modeling the relationship between the insulation resistance measured ...
A semantic approach for document clustering
(
Academy Publisher
, 2009 , Article)
Conventional document mining systems mainly use the presence or absence of keywords to mine texts. However, simple word counting and frequency distributions of term appearances do not capture the meaning behind the words, ...
Composite sandwich structures for crashworthiness applications
(2007 , Article)
Fibre-reinforced polymer sandwiches are promising materials for reducing vehicle mass, thereby improving the fuel economics. Nonetheless, to fully explore these materials as the primary structures and energy absorbers in ...
التكليف بما لا يطاق عند علماء الكلام
(
جامعة مؤتة
, 2002 , Article)
إن هذه المسألة تكسب أهميتها من خلال ارتباطها الوئيق بالجانب الأخلاقي عند الإنسان، يظهر ذلك في مدى مسؤليته عن فعله الذي لا بد أن تتوفر فيه حرية الاختيار زيادة على الاستطاعة على الفعل والترك، وقد أكد الله سبحانه وتعالى في ...
Markedly improved CO2 capture efficiency and stability of gallium substituted hydrotalcites at elevated temperatures
(
American Chemical Society
, 2009 , Article)
Potassium carbonate promoted, Ga3+ substituted hydrotalcites reported here exhibit very high, selective and reversible CO2 capture from an exhaust gas mixture. The 10% Ga3+ substitution improved the CO2 capture from 0.3 ...
An approach for constructing complex discriminating surfaces based on Bayesian interference of the maximum entropy
(
Elsevier Inc.
, 2003 , Article)
In this paper we present a comprehensive Maximum Entropy (MaxEnt) procedure for the classification tasks. This MaxEnt is applied successfully to the problem of estimating the probability distribution function (pdf) of a ...