Given a set of n nonoverlapping circular discs on a plane, we aim to determine possible positions of points (referred to as cameras) that could fully illuminate all the circular discs’ boundaries. This work presents ...
详细信息
Given a graph G and an integer k, the objective of the Π-Contraction problem is to check whether there exists at most k edges in G such that contracting them in G results in a graph satisfying the property Π. We inv...
详细信息
We report on an extensive study of the viscosity of liquid water at near-ambient conditions,performed within the Green-Kubo theory of linear response and equilibrium ab initio molecular dynamics(AIMD),based on density...
详细信息
We report on an extensive study of the viscosity of liquid water at near-ambient conditions,performed within the Green-Kubo theory of linear response and equilibrium ab initio molecular dynamics(AIMD),based on density-functional theory(DFT).In order to cope with the long simulation times necessary to achieve an acceptable statistical accuracy,our ab initio approach is enhanced with deep-neural-network potentials(NNP).This approach is first validated against AIMD results,obtained by using the Perdew–Burke–Ernzerhof(PBE)exchange-correlation functional and paying careful attention to crucial,yet often overlooked,aspects of the statistical data ***,we train a second NNP to a dataset generated from the Strongly Constrained and Appropriately Normed(SCAN)*** the error resulting from the imperfect prediction of the melting line is offset by referring the simulated temperature to the theoretical melting one,our SCAN predictions of the shear viscosity of water are in very good agreement with experiments.
This paper explores the integration of Web 2.0 tools into teaching and learning at a Thai university, focusing on the alignment of these tools with specific pedagogical approaches to enhance engagement and learning ou...
详细信息
ISBN:
(数字)9798350366303
ISBN:
(纸本)9798350366310
This paper explores the integration of Web 2.0 tools into teaching and learning at a Thai university, focusing on the alignment of these tools with specific pedagogical approaches to enhance engagement and learning outcomes. The study, conducted within the context of a blended learning environment influenced by the COVID-19 pandemic, employed problem-tree analysis and semi-structured interviews with faculty, IT support staff, and students. Findings reveal challenges related to tool complexity, the need for comprehensive teacher training, and the importance of aligning technology with pedagogical strategies. The research highlights the need for a more streamlined approach to Web 2.0 tool integration, emphasizing careful selection, effective teacher training, and a thoughtful blending of online and on-site learning experiences to improve student engagement and learning. The study contributes to the ongoing conversation surrounding effective technology integration in higher education by offering practical insights for improving teaching and learning in diverse contexts.
Day-ahead electricity prices in today’s competitive electric power markets have complex features such as high frequency, high volatility, non-linearity, non-stationarity, mean reversion, multiple periodicities, and c...
详细信息
Day-ahead electricity prices in today’s competitive electric power markets have complex features such as high frequency, high volatility, non-linearity, non-stationarity, mean reversion, multiple periodicities, and calendar effects. These complicated features make price forecasting difficult. To address this, this research examines the application of functional data analysis to forecasting day-ahead electric power prices. Compared to classical time series forecasting approaches, functional data analysis is more appealing since it anticipates the daily profile, allowing for short-term projections. This technique uses a functional autoregressive ((Formula presented.) AR) and a functional autoregressive with exogenous predictors ((Formula presented.) AR (Formula presented.)) model to predict the next-day electric power prices. In addition, standard time-series forecasting models, including autoregressive (AR) AR (Formula presented.), autoregressive integrated moving average (ARIMA), and ARIMA (Formula presented.) are also utilized for comparison. The model’s prediction performance was evaluated using data on electricity prices from the British electricity market, considering forecast error indicators and the same forecast statistical test. The results show that the proposed functional models ((Formula presented.) AR and (Formula presented.) AR (Formula presented.)) outperform standard time series models. In comparison to the benchmark models (AR, AR (Formula presented.), ARIMA, ARIMA (Formula presented.), and the proposed (Formula presented.) AR model), the (Formula presented.) AR (Formula presented.) model reduces: the day-ahead forecasting average MAPE by ranges of 5.02%–45.77%, 4.07%–40.63%, 3.80%–38.99%, 1.90%–24.22%, and 0.95%–13.78%;MAE by ranges of 9.43%–69.32%, 5.17%–65.48%, 6.04%–59.16%, 3.02%–42.01%, and 1.51%–26.59%;RMSE by ranges of 8.98%–40.97%, 6.68%–34.03%, 4.22%–24.58%, 3.91%–23.20%, and 2.30%–15.11%. Furthermore, compared with the literature-proposed b
We present a novel dynamic model of a flash clay calciner. The model consists of thermophysical properties, reaction kinetics and stoichiometry, transport, mass and energy balances, and algebraic constraints. This giv...
详细信息
This study aims to present a feasible LFC (Load Frequency Control) model that integrates physical security limitations, namely GRC, GDB, and TD. The presence of this characteristic guarantees that the design is not on...
详细信息
Multi-agent robotic exploration stands to play an important role in space exploration as the next generation of robotic systems ventures to far-flung environments. A key challenge in this new paradigm will be to effec...
详细信息
Any attracting, hyperbolic and proper node of a two-dimensional analytic vector-field has a unique strong-stable manifold. This manifold is analytic. The corresponding weak-stable manifolds are, on the other hand, not...
详细信息
The complexity of Gröbner computations has inspired many improvements to Buchberger’s algorithm over the years. Looking for further insights into the algorithm’s performance, we offer a threaded implementation ...
详细信息
暂无评论