Results 11 to 20 of about 4,794,485 (241)

DUAL BAND FILTER DESIGN USING REAL FREQUENCY TECHNIQUE AND FREQUENCY TRANSFORMATION [PDF]

open access: yesElectrica, 2017
In this work, we present a frequency transformation based dual-band filter design approach using scatteringbased real frequency technique. In the design process, conventional low-pass to band-pass frequency transformation isintegrated with the simplified
Serkan YILDIZ   +2 more
doaj   +5 more sources

Frequency and determinants for hemorrhagic transformation of posterior cerebral stroke [PDF]

open access: yesBMC Research Notes, 2017
Background hemorrhagic transformation is a threatening ischemic stroke complication. Frequency of hemorrhagic transformation differs greatly among studies, and its risk factors have been usually studied in patients with anterior ischemic stroke who ...
Francesca Valentino   +8 more
doaj   +2 more sources

Frequency and fundamental signal measurement algorithms for distributed control and protection applications [PDF]

open access: yes, 2009
Increasing penetration of distributed generation within electricity networks leads to the requirement for cheap, integrated, protection and control systems.
Burt, G.M.   +2 more
core   +4 more sources

Multiband Matching Network Design via Transformation based Real Frequency Approach

open access: yes, 2021
In this paper, a new method is presented for multiband matching network design. Low pass to band pass (LP-BP) frequency transformation is incorporated with the parametric Real Frequency Technique (RFT) for creating multiband network functions. In the new
Yildiz, Serkan   +2 more
core   +2 more sources

Transformation of Frequency Distributions [PDF]

open access: yesNature, 1948
FREQUENCY distributions of numbers of eggs, insects, spores, or other biological entities are descriptive of discrete variation, and can never be represented exactly by a normal distribution or by any other distribution of a continuous variate. Nevertheless, when the number of observations and the range of variation is large, such distributions may ...
openaire   +2 more sources

Effect of Nutritional Determinants and TonB on the Natural Transformation of Riemerella anatipestifer

open access: yesFrontiers in Microbiology, 2021
Riemerella anatipestifer is a gram-negative bacterium that is the first naturally competent bacterium identified in the family Flavobacteriaceae. However, the determinants that influence the natural transformation and the underlying mechanism remain ...
Li Zhang   +55 more
doaj   +1 more source

DESIGN OF BAND-PASS FILTERS WITH NON-EQUIRIPPLE FREQUENCY RESPONSES

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. Band-pass filters circuit elements can be calculated by converting low-pass filter (LPF) parameters, which is the prototype of the designed band-pass filter.
Evgeniy N. Chervinskiy
doaj   +1 more source

The Effect of Drying–Wetting Cycles on Soil Inorganic Nitrogen Transformation in Drip-Irrigated Cotton Field Soil in Northwestern China

open access: yesApplied Sciences, 2023
Drip irrigation under plastic mulch is widely used and leads to periodic drying–rewetting (DW) cycles in Xinjiang, Northwest China. However, the effect of different wet and dry alternation types on soil inorganic nitrogen transformation is not clear ...
Honghong Ma   +3 more
doaj   +1 more source

THE METOD OF SYNTHESIS OF QUASI-DUAL-BAND MATCHING DEVICE

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники, 2020
The article presents some findings on the potential of analytical methods for the synthesis of broadband matching circuits for solving nontrivial circuit engeneering problems.
M. A. Yantsevich, H. A. Filipovich
doaj   +1 more source

A reliable system for the transformation of cantaloupe charentais melon (Cucumis melo L. var. cantalupensis) leading to a majority of diploid regenerants [PDF]

open access: yes, 2000
An efficient system of transformation leading to a majority of transformed diploid plants from leaf explants of Cucumis melo L. var. Cantalupensis (cv. Védrantais) was developed.
Roustan, Jean-Paul   +9 more
core   +1 more source

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