Results 11 to 20 of about 1,623,042 (284)
Alkenylation and Allylation of Aldehydes by Using an Ni/Cr/TDAE Redox System [PDF]
, 2001 In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan ...
Goto, Kentaro +4 more
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Frontiers 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
Inverting Time-Dependent Harmonic Oscillator Potential by a Unitary Transformation and a New Class of Exactly Solvable Oscillators [PDF]
, 1996 A time-dependent unitary (canonical) transformation is found which maps the Hamiltonian for a harmonic oscillator with time-dependent real mass and real frequency to that of a generalized harmonic oscillator with time-dependent real mass and imaginary ...
A. B. Nassar +17 more
core +2 more sources
Determination of the threshold of the break-up of invariant tori in a class of three frequency Hamiltonian systems [PDF]
, 2001 We consider a class of Hamiltonians with three degrees of freedom that can be mapped into quasi-periodically driven pendulums. The purpose of this paper is to determine the threshold of the break-up of invariant tori with a specific frequency vector.
Abad +22 more
core +4 more sources
DESIGN OF BAND-PASS FILTERS WITH NON-EQUIRIPPLE FREQUENCY RESPONSES
Известия 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
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Applied 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
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Multiband Filter Design Using Generalized Mapping Functions and Synthesis with Lumped Resonators [PDF]
Radioengineering, 2020 In this paper, a new multiband frequency mapping function is proposed to design multiband filter. The presented mapping function is a generalized form of the sequential low pass to band pass (LPtoBP) transformation.
S. Yildiz +3 more
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THE METOD OF SYNTHESIS OF QUASI-DUAL-BAND MATCHING DEVICE
Доклады 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
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Application of Time-Frequency Analysis in Rotating Machinery Fault Diagnosis
Shock and Vibration, 2023 Fault diagnosis is an important means to ensure the safe and reliable operation of mechanical equipment. In machinery fault diagnosis, collecting and mining the potential fault information of the vibration signal is the most commonly used method to ...
Yihao Bai +3 more
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Frontiers in Plant Science, 2023 Highly efficient genetic transformation technology is beneficial for plant gene functional research and molecular improvement breeding. However, the most commonly used Agrobacterium tumefaciens-mediated genetic transformation technology is time-consuming
Min Wang +4 more
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