Highly efficient magnetically tunable high frequency spur-line notch filter

2020 ◽  
Vol 20 (6) ◽  
pp. 773-776
Author(s):  
Deepanshu Sharma ◽  
Neeraj Khare
Keyword(s):  
High Frequency ◽  
Notch Filter ◽  
Highly Efficient

Highly Efficient, Water-Soluble Polarizing Agents for Dynamic Nuclear Polarization at High Frequency

2013 ◽  
Vol 125 (41) ◽  
pp. 11058-11061 ◽  
Author(s):  
Claire Sauvée ◽  
Melanie Rosay ◽  
Gilles Casano ◽  
Fabien Aussenac ◽  
Ralph T. Weber ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
High Frequency ◽  
Nuclear Polarization ◽  
Water Soluble ◽  
Highly Efficient

A Layered Notch Filter for High-Frequency Dynamic Isolation

1989 ◽  
Vol 111 (1) ◽  
pp. 17-24 ◽  
Author(s):  
J. L. Sackman ◽  
J. M. Kelly ◽  
A. E. Javid
Keyword(s):  
High Frequency ◽  
Plane Waves ◽  
Notch Filter ◽  
Theoretical Development ◽  
Parallel Plates ◽  
Layered Composites ◽  
Mechanical Filter ◽  
Specific Frequency ◽  
Working Principle ◽  
High Frequency Vibrations

An efficient method of isolation from high-frequency vibrations is the use of periodically layered composites acting as a mechanical filter. This device is a periodically layered stack of alternating materials with widely different densities and stiffnesses. The working principle of the device is wave reflection, and the device becomes increasingly effective when there is a large impedance mismatch which leads to rapid attenuation of an input wave for certain frequency ranges. This filter acts only in specific frequency bands. At other frequencies, it will transmit the vibratory energy unmodified, thus acting as a mechanical notch filter. The theoretical development of the mechanical notch filter is based on the theory of waves in periodically layered media. Floquet theory is used to solve the equations for the propagation of plane waves through a laminated system of parallel plates of different materials when the direction of propagation is normal to the plates. Several experiments were conducted to prove the validity of the mechanical notch filter concept. These experiments demonstrated that the theory is correct and that the results have practical application.

scholarly journals A Novel Adaptive Frequency Estimation Algorithm Based on Interpolation FFT and Improved Adaptive Notch Filter

2017 ◽  
Vol 17 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Ting-ao Shen ◽  
Hua-nan Li ◽  
Qi-xin Zhang ◽  
Ming Li
Keyword(s):  
Convergence Rate ◽  
High Frequency ◽  
Frequency Estimation ◽  
Notch Filter ◽  
Estimation Algorithm ◽  
Signal Frequency ◽  
Tracking Accuracy ◽  
Frequency Tracking ◽  
Adaptive Notch Filter ◽  
Fast Estimation

Abstract The convergence rate and the continuous tracking precision are two main problems of the existing adaptive notch filter (ANF) for frequency tracking. To solve the problems, the frequency is detected by interpolation FFT at first, which aims to overcome the convergence rate of the ANF. Then, referring to the idea of negative feedback, an evaluation factor is designed to monitor the ANF parameters and realize continuously high frequency tracking accuracy. According to the principle, a novel adaptive frequency estimation algorithm based on interpolation FFT and improved ANF is put forward. Its basic idea, specific measures and implementation steps are described in detail. The proposed algorithm obtains a fast estimation of the signal frequency, higher accuracy and better universality qualities. Simulation results verified the superiority and validity of the proposed algorithm when compared with original algorithms.

Automatic Loop Shaping of Structured Controllers Satisfying QFT Performance

2004 ◽  
Vol 127 (3) ◽  
pp. 472-477 ◽  
Author(s):  
O. Yaniv ◽  
M. Nagurka
Keyword(s):  
Phase Ii ◽  
High Frequency ◽  
Notch Filter ◽  
Quantitative Feedback Theory ◽  
Design Problems ◽  
Frequency Dependent ◽  
Nonminimum Phase ◽  
Loop Shaping

This paper presents a robust noniterative algorithm for the design of controllers of a given structure satisfying frequency-dependent sensitivity specifications. The method is well suited for automatic loop shaping, particularly in the context of Quantitative Feedback Theory (QFT), and offers several advantages, including (i) it can be applied to unstructured uncertain plants, be they stable, unstable or nonminimum phase, (ii) it can be used to design a satisfactory controller of a given structure for plants which are typically difficult to control, such as highly underdamped plants, and (iii) it is suited for design problems incorporating hard restrictions such as bounds on the high-frequency gain or damping of a notch filter. It is assumed that the designer has some idea of the controller structure appropriate for the loop shaping problem.

scholarly journals Prime editing primarily induces undesired outcomes in mice

2020 ◽  
Author(s):  
Tomomi Aida ◽  
Jonathan J. Wilde ◽  
Lixin Yang ◽  
Yuanyuan Hou ◽  
Mengqi Li ◽  
...  
Keyword(s):  
Genome Editing ◽  
High Frequency ◽  
Mouse Embryos ◽  
Biomedical Science ◽  
New Approach ◽  
Chemically Modified ◽  
Highly Efficient ◽  
Large Deletions

SummaryGenome editing has transformed biomedical science, but is still unpredictable and often induces undesired outcomes. Prime editing (PE) is a promising new approach due to its proposed flexibility and ability to avoid unwanted indels. Here, we show highly efficient PE-mediated genome editing in mammalian zygotes. Utilizing chemically modified guideRNAs, PE efficiently introduced 10 targeted modifications including substitutions, deletions, and insertions across 6 genes in mouse embryos. However, we unexpectedly observed a high frequency of undesired outcomes such as large deletions and found that these occurred more often than pure intended edits across all of the edits/genes. We show that undesired outcomes result from the double-nicking PE3 strategy, but that omission of the second nick largely ablates PE function. However, sequential double-nicking with PE3b, which is only applicable to a fraction of edits, eliminated undesired outcomes. Overall, our findings demonstrate the promising potential of PE for predictable, flexible, and highly efficient in vivo genome editing, but highlight the need for improved variations of PE before it is ready for widespread use.

Notch filter artefact mimicking high frequency oscillation in epilepsy

2016 ◽  
Vol 127 (1) ◽  
pp. 979-981 ◽  
Author(s):  
Leyla Baysal Kirac ◽  
Christian Vollmar ◽  
Jan Rémi ◽  
Anna Mira Loesch ◽  
Soheyl Noachtar
Keyword(s):  
High Frequency ◽  
Notch Filter ◽  
High Frequency Oscillation ◽  
Frequency Oscillation
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