24 papers · ranked by Valyu relevance
Peter Seiler, Andrew Packard, P. Gahinet
Feedback controllers are designed to ensure stability and achieve a variety of performance objectives including reference tracking and disturbance rejection. Control engineers have developed different types of "safety factors" to account for the mismatch between the plant model used for control design and the dynamics…
Axel Ringh, Johan Karlsson, Anders Lindquist
—Unlike the situation with gain and phase margins in robust stabilization, the problem to determine an exact maximum delay margin is still an open problem, although extensive work has been done to establish upper and lower bounds. The problem is that the corresponding constraints in the Nyquist plot are frequency…
Rajnish Bhusal, Kamesh Subbarao
—This paper provides a framework to characterize the gain margin, phase margin, and input delay margin of a linear time-invariant multi-agent system where the interaction topology is described by a graph with a directed spanning tree. The stability analysis of the multi-agent system based on the generalized Nyquist…
Kishwar Shafin, Trevor Pesout, Pi-Chuan Chang, Maria Nattestad + 9 more
Long-read sequencing has the potential to transform variant detection by reaching currently difficult-to-map regions and routinely linking together adjacent variations to enable read based phasing. Third-generation nanopore sequence data has demonstrated a long read length, but current interpretation methods for its…
Jyun-Hong Lin, Liang-Chi Chen, Shu-Qi Yu, Yao-Ting Huang
Long-read phasing has been used for reconstructing diploid genomes, improving variant calling, and resolving microbial strains in metagenomics. However, the phasing blocks of existing methods are broken by large Structural Variations (SVs), and the efficiency is unsatisfactory for population-scale phasing. This paper…
Yuli Jiang, Jian Liang, Chunyan Wang, Li Tan + 3 more
'Shingo Nagawa' 'Cheng-Yang Huang'] Highly differentiated tissues and organs play essential biological functions in multicellular organisms. Coordination of organ developmental process with tissue differentiation is necessary to achieve proper development of mature organs, but mechanisms for such coordination are not…
Л. Б. Лиокумович, А. В. Медведев, Konstantin Muravyov, Philipp V. Skliarov + 1 more
'Philipp V. Skliarov' 'Nikolai Ushakov'] In current paper, distortions in digital demodulation schemes with harmonic phase modulation for interferometric optical sensors are considered. In particular, the influence of target signal variations on phase demodulation errors is theoretically evaluated. An analytical…
Hong Sun, Shu-Fang Hsu Schmitz
Background So far, NI trials are almost exclusively performed in phase III setting. However, the NI question might already be relevant in phase II setting in several scenarios, like: treatment optimization in diseases for which standard treatments already exist, or investigation of cytostatic agents, or rare diseases…
Wataru Kokuyama, Hideaki Nozato, T. R. Schibli
We developed a compact and easy-to-use phase meter based on a zero-crossing counting algorithm for digitized signals. Owing to the algorithm, the phase meter has low-noise and wide dynamic range. Low-noise differential phase measurements can be done for square waves (−204 dBrad2/Hz for a 1-kHz, 1-Vp−p signal, 10 Hz−1…
Andrew Harvie, John de Mello
The Open Polarimeter (“Opol”) is a phase-based, high-resolution laser polarimeter formed from a small number of inexpensive optomechanical parts. The complete instrument can be assembled from scratch in two days for less than US$250, using only a 3D-printer and a benchtop milling machine. However despite its low cost…
Anirudh Wodeyar, François A. Marshall, Catherine J. Chu, Uri T. Eden + 1 more
Rhythms are a common feature of brain activity. Across different types of rhythms, the phase has been proposed to have functional consequences, thus requiring its accurate specification from noisy data. Phase is conventionally specified using techniques that presume a frequency band-limited rhythm. However, in…
Nejc Suhadolnik, Jernej Rozman, Tilen Svete, Žiga Korošak + 3 more
'Maja Atanasijević-Kunc' 'Anton Pleteršek' 'Christos Koulamas'] The paper covers one of the communication technologies used in wireless sensor networks. We have presented improvements in existing radio frequency identification (RFID) systems to address the problem of the phase selection in active load modulation (ALM).…
Baoqing Du, Dazheng Feng, Yaohua Tang, Xin Geng + 4 more
'Chaofeng Cai' 'Maoquan Wan' 'Zhigang Yang'] Aiming at the more complex frequency translation, the longer response time and the limited measurement precision in the traditional phase processing, a high-resolution phase processing method by group quantization higher than 100 fs level is proposed in radio frequency…
Anirudh Wodeyar, Mark Schatza, Alik S. Widge, Uri T. Eden + 1 more
Brain rhythms have been proposed to facilitate brain function, with an especially important role attributed to the phase of low frequency rhythms. Understanding the role of phase in neural function requires interventions that perturb neural activity at a target phase, necessitating estimation of phase in real-time.…
Qun Ge, Lu Ren, Jia Li
In currently known theories and algorithms of fault recording analysis and application, there is little literature where fault feature parameters are mined deeply from electrical physical quantities themselves. In this report the calculation method of the phase angles of the reference point and sample points is…
Yu-Chen Huang, Aymen Alian, Yu-Lun Lo, Kirk Shelley + 1 more
Phase is the most fundamental physical quantity when we study an oscillatory time series, and there are a lot of tools aiming to estimate phase. Most existing tools are developed based on the well-developed analytic function model. Unfortunately, this approach might not be suitable for several modern signals…
Akari Matsuki, Hiroshi Kori, Ryota Kobayashi
Rhythmic activity is ubiquitous in biological systems from the cellular to organism level. Reconstructing the instantaneous phase is the first step in analyzing the essential mechanism leading to a synchronization state from the observed signals. A popular method of phase reconstruction is based on the Hilbert…
Angela Digulescu, Cornel Ioana, Alexandru Serbanescu
Monitoring highly dynamic environments is a difficult task when the changes within the systems require high speed monitoring systems. An active sensing system has to solve the problem of overlapped responses coming from different parts of the surveyed environment. Thus, the need of a new representation space which…
Xiangdong Huang, Jingwen Xu, Zheng Wang
This paper proposes a novel phase estimator based on fully-traversed Discrete Fourier Transform (DFT) which takes all possible truncated DFT spectra into account such that it possesses two merits of ‘direct phase extraction’ (namely accurate instantaneous phase information can be extracted without any correction) and…
M. T. Ma, J. W. Adams
A method is presented for predicting the total response, in both frequency and time, of an unknown linear system when only the measured continuous wave (cw) magnitude is available. The approach is based on approximating the square of the measured magnitude by a rational function, from which various system transfer…
Sara Giarrusso, Paola Gori-Giorgi, Federica Agostini
We generalize the definitions of local scalar potentials named vkin and vN−1, which are relevant to properly describe phenomena such as molecular dissociation with density-functional theory, to the case in which the electronic wavefunction corresponds to a complex current-carrying state. In such a case, an extra term…
Ning Cao, William Bro-Jørgensen, Xiaohong Zheng, Gemma Solomon
Quantum interference effects in conjugated molecules have been well explored, with benzene frequently invoked as a pedagogical example. These interference effects have been understood through a quantum interference map in which the electronic transmission is separated into interfering and non-interfering terms, with a…
suraj Manikandan, Jens Andreasen
This preprint has been retracted at the authors' request because of recently discovered fundamental errors and misrepresentation in the underlying data.This communication introduces a Ka-band phase shifter that leverages a blend of the donor polymer PM6 and non-fullerene acceptor (NFA) Y7 organic materials. The design…
Authors not listed
This report compares various simulation and data analysis methods for free induction decay (FID) signals in Nuclear Magnetic Resonance (NMR) Spectroscopy. The methods discussed include discrete fast Fourier transformation (FFT), least squares fitting (LSF), short-time Fourier transformation (STFT), and wavelet…