20 papers · ranked by Valyu relevance
Sean P. Carney, Wen Ma, Kevin D. Whitley, Haifeng Jia + 3 more
UvrD, a model for non-hexameric Superfamily 1 helicases, utilizes ATP hydrolysis to translocate stepwise along single-stranded DNA and unwind the duplex. To dissect the mechanism underlying DNA unwinding, we use optical tweezers to measure directly the stepping behavior of UvrD as it processes a DNA hairpin and show…
Yiannis Hadjimichael, David I. Ketcheson, Lajos Lóczi, Adrián Németh
Strong stability preserving (SSP) methods are designed primarily for time integration of nonlinear hyperbolic PDEs, for which the permissible SSP step size varies from one step to the next. We develop the first SSP linear multistep methods (of order two and three) with variable step size, and prove their optimality…
Sören Bartels, Marijo Milicevic
The alternating direction method of multipliers (ADMM) is a flexible method to solve a large class of convex minimization problems. Particular features are its unconditional convergence with respect to the involved step size and its direct applicability. This article deals with the ADMM with variable step sizes and…
Qiaran Lu, Huanding Qin, Fangmin He, Yunshuo Zhang + 2 more
'Jin Meng'] The interference cancellation ratio (ICR) is a key performance indicator of digital-to-analog hybrid radio frequency (RF) interference cancellation systems. Aiming at the low convergence speed of a digital-to-analog hybrid RF interference cancellation system based on a multi-tap structure (MDARFICS), a…
Jiayi Geng, Fanqing Ji, Shouliang Li, Yulin Shen + 2 more
'Boris Ryabko'] Pulse-coupled neural networks (PCNNs) are capable of segmenting digital images in a multistage unsupervised fashion; however, optimal output selection remains challenging. To address the above problem, this paper emphasizes the role of the step size, which influences the decreasing speed of the membrane…
Zhaoqing Mu, Ying Gao, Xinyu Guo, Shifeng Ou + 2 more
'Anastasios Doulamis'] Active Noise Control (ANC) is frequently utilized to minimize noise in industrial environments. However, the powerful pulses in industrial noise pose challenges to its application. Consequently, ANC systems necessitate a high-performance algorithm as a core component. In this process, the…
Carlos M. Mora, Juan Carlos Jiménez, M. Selva
We address the weak numerical solution of stochastic differential equations driven by independent Brownian motions (SDEs for short). This paper develops a new methodology to design adaptive strategies for determining automatically the step-sizes of the numerical schemes that compute the mean values of smooth functions…
Jianming Liu, Steven L. Grant
This paper proposes an improved variable step-size (VSS) scheme for zero-point attracting projection (ZAP) algorithm. The proposed VSS is proportional to the sparseness difference between filter coefficients and the true impulse response. Meanwhile, it works for both sparse and non-sparse system identification, and…
Haonan Hu, Xin Wen, Jiazun Hu, Haiyu Chen + 3 more
'Yongmin Zhong'] In this paper, a planning method based on the spatiotemporal variable-step-size A algorithm is proposed to address the problem of safe trajectory planning for incremental, wheeled, mobile robots in complex motion scenarios with multiple robots. After constructing the known conditions, the…
Beiyi Liu, Guan Gui, Li Xu, Nobuhiro Shimoi
Invariable step size based least-mean-square error (ISS-LMS) was considered as a very simple adaptive filtering algorithm and hence it has been widely utilized in many applications, such as adaptive channel estimation. It is well known that the convergence speed of ISS-LMS is fixed by the initial step-size. In the…
Wansheng Wang, Mengli Mao, Zheng Wang
In this paper stability and error estimates for time discretizations of linear and semilinear parabolic equations by the two-step backward differentiation formula (BDF2) method with variable step-sizes are derived. An affirmative answer is provided to the question: whether the upper bound of step-size ratios for the…
Leslie M. Theunissen, Volker Dürr, Holger G Krapp
Background Adaptive, context-dependent control of locomotion requires modulation of centrally generated rhythmic motor patterns through peripheral control loops and postural reflexes. Thus assuming that the modulation of rhythmic motor patterns accounts for much of the behavioural variability observed in legged…
David M. Desmet, Joseph P. Cusumano, Jonathan B. Dingwell
To successfully traverse their environment, humans must often perform maneuvers to achieve desired task goals while simultaneously maintaining balance. Humans accomplish these tasks primarily by modulating their foot placements. As humans are more unstable laterally, we must better understand how humans modulate…
Anna C. Render, Joseph P. Cusumano, Jonathan B. Dingwell
Most often, gait biomechanics is studied during straight-ahead walking. However, real-life walking imposes various lateral maneuvers people must navigate. Such maneuvers challenge people’s lateral balance and can induce falls. Determining how people regulate their stepping movements during such complex walking tasks is…
Anderson Souza Oliveira, Cristina Ioana Pirscoveanu
Low reproducibility and non-optimal sample sizes are current concerns in scientific research, especially within human movement studies. Therefore, this study aimed to examine the implications of different sample sizes and number of steps on data variability and statistical outcomes from kinematic and kinetics running…
Meghan E. Kazanski, Joseph P. Cusumano, Jonathan B. Dingwell
Walking humans often navigate complex, dynamically changing walking paths. To better understand falling risk, is critical that we first determine how older adults purposefully vary their steps in varying environments that challenge balance. Here, 20 young (21.7±2.6 yrs) and 18 older (71.6±6.0 yrs) healthy adults walked…
Deanna D. Rumble, Christopher P. Hurt, David A. Brown, Steven Allen Gard
H1 and H2 SBS-FTA variability was calculated by bisecting the swing phase with the weighted centroid position. The weighted centroid position for each step was calculated to divide the anterior-posterior trajectory at mid-swing. The weighted centroid position was calculated by (1) locating data points from foot off to…
Pawel Kudzia, Stephen N. Robinovich, J. Maxwell Donelan
Our legs act as our primary contact with the surrounding environment, generating external forces that enable agile motion. To be agile, the nervous system has to control both the magnitude of the force that the feet apply to the ground and the point of application of this force. The purpose of this study was to…
Arne Kutzner, Pok-Son Kim, Markus Schmidt
Seeding is usually the initial step of high-throughput sequence aligners. Two popular seeding strategies are fixed-size seeding (k-mers, minimizers) and variable-size seeding (MEMs, SMEMs, max. spanning seeds). The former strategy benefits from fast index building and fast seed computation, while the latter one…
Zhihao Lan, WanZhen Liang
The variational quantum eigensolver (VQE) algorithm can simulate the chemical systems such as molecules in the noisy intermediate-scale quantum devices and shows promising applications in quantum chemistry simulations. The accuracy and computational cost of the VQE simulations are determined by the underlying Ansätze.…