Search results for "Impedance"

showing 2 items of 432 documents

Abdominālo taukaudu relatīvā daudzuma salīdzinošs izvērtējums ar bioimpedances analīzes un antropometriskām metodēm

2018

Viens no kardio-metabolo saslimšanu riska faktoriem ir paaugstināts svars, kas saistīts ar paaugstinātu tauku masu, īpaši abdominālajā apvidū. Metaboli nelabvēlīgas aptaukošanās vienkāršai un lētai diagnosticēšanai līdzās antropometriskajām metodēm, ienāk bioelektriskās impedances analīzes metodes, tomēr šo metožu precizitāte tiek pretrunīgi vērtēta. Tādejādi darba mērķis bija izvērtēt antropometrisko un bioimpedances analīzes metožu savstarpējo kolerāciju kopējās un abdominālās relatīvās tauku masas novērtēšanai. Pētījumā piedalījās 78 cilvēki (48 sievietes; 30 vīrieši). Pētījuma dalībniekiem ar antorpometriskajām un bioimpedances analīzes metodēm tika noteikti ķermeņa audu kompozīciju rak…

vidukļa apkārtmērssagitālais abdominālais diametrsabdominālie taukaudirelatīva tauku masaBioloģijabioimpedances analīze
researchProduct

Decoupled control scheme of grid-connected split-source inverters

2017

Grid-connected power conversion systems for renewable energy sources must fulfill several requirements, e.g., the high efficiency, the reduced cost and complexity, and, quite often, the boost capabilities that is usually achieved using a front-end dc–dc boost converter before the inversion stage, leading to a two-stage architecture. Meanwhile, single-stage power conversion systems, which perform the boosting operation within the inversion one, offer some potential advantages, in terms of reducing the complexity and the volume of the whole system. Among several proposed options, the split-source inverter (SSI) has been recently proposed by Abdelhakim et al. as an alternative option with some…

voltage-source inverter (VSI)EngineeringDecoupled control; grid connected; impedance-based inverters; renewable energy sources (RESs); single-stage; space vector; split-source inverter (SSI); synchronous reference frame; voltage-source inverter (VSI); Z-source inverter (ZSI); Control and Systems Engineering; Electrical and Electronic Engineering020209 energyModulation index02 engineering and technologySettore ING-INF/01 - Elettronicasynchronous reference frameControl theoryspace vector0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringMATLABcomputer.programming_languagesplit-source inverter (SSI)Z-source inverter Decoupled control Grid-connected Impedance-based inverters Renewable energy sources Single-stage Space vector Split-source inverter Synchronous reference frame Voltage source inverter Mathematical model Inverters Modulation Switches Voltage control Standards Topologybusiness.industry020208 electrical & electronic engineeringInversion (meteorology)Z-source inverter (ZSI)Gridsingle-stageDecoupled controlControl and Systems Engineeringimpedance-based invertersBoost converterrenewable energy sources (RESs)Invertergrid connectedReduced costbusinesscomputerReference frame
researchProduct