Article
Computer Science, Artificial Intelligence
Teng Wang, Jun Zhao, Zhi Hu, Xinyu Yang, Xuebin Ren, Kwok-Yan Lam
Summary: This paper explores novel mechanisms to achieve (epsilon, delta)-LDP with higher data utility in collecting and analyzing users' data, including algorithms for mean estimations on multi-dimensional numeric data and local protocols for frequency estimations on categorical attributes. The proposed (epsilon, delta)-LDP-compliant stochastic gradient descent algorithms for machine learning models are also studied. Extensive experiments on real-world and synthetic datasets demonstrate the high data utility of the proposed algorithms in various tasks.
Article
Energy & Fuels
Yassine Bensaad, Fabian Friedrichs, Johannes Sieg, Judith Baehr, Alexander Fill, Kai Peter Birke
Summary: Due to the increasing demand for lithium-ion batteries in automotive applications, understanding their use and degradation is becoming more important. This paper presents a new method to quantify cell degradation's multidimensional aging and inhomogeneity using data-driven modal reduction. Offline findings from measured differential voltage curves and electrochemical simulations are encrypted in low-rank patterns for on-board application. The proposed algorithm is tested on a dataset of eighteen automotive pouch cells cycled for accelerated aging, yielding estimates of cell capacity and the loss of active lithium and active material at the anode and cathode. The algorithm also estimates the inhomogeneity of cell aging by linking reference differential voltage curves to post-mortem findings.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Mathematics
Bang-Yen Chen, Adara M. Blaga, Gabriel-Eduard Vilcu
Summary: This article discusses the optimal relationships between intrinsic and extrinsic invariants for submanifolds in the theory of submanifolds. It focuses on the concept of delta-invariants for Riemannian manifolds and their applications in complex space forms.
Article
Mathematics, Applied
Vladimir Klinshov, Leonhard Luecken, Petro Feketa
Summary: The usage of the product of the Dirac delta function and the phase response curve in models of phase oscillators with pulsatile inputs needs to be carefully considered, as the most canonical interpretation does not always lead to the intended behavior. This caution is due to the ambiguity of this notation, which may not accurately describe the discontinuous phase dynamics in such systems.
Review
Chemistry, Physical
Jarred Z. Olson, Carmen M. Lopez, Edmund J. F. Dickinson
Summary: Differentiation of a Li-ion battery cycling profile results in a pair of complementary measures, differential capacity and differential voltage, which are used to diagnose cell state and aging mechanisms. This article presents a fundamental theory of differential analysis from single electrode measurements to full cell data, considering cell balancing and degradation. The new approach uses a graphical heuristic to superimpose voltage and capacity data on a 2D representation of the cell state, harmonizing various complementary approaches from existing literature.
CHEMISTRY OF MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jeremy Wee Kiat Ng, Kar Wai Tan, Dian Yan Guo, Joey Jia Hui Lai, Xiubo Fan, Zhiyong Poon, Tse Hui Lim, Alvin Soon Tiong Lim, Tony Kiat Hon Lim, William Ying Khee Hwang, Shang Li, Connie J. Eaves, Yeow Tee Goh, Alice Man Sze Cheung
Summary: Human cord blood-derived γ6 T cells (CB γ6) have a diverse TCR γ6 repertoire and unique subtype composition. In vitro expansion of CB γ6 revealed their differentiation into neoantigen-reactive tumor-infiltrating lymphocytes, tissue-resident memory precursor-like cells, and antigen-presenting cell-like cells. These differentiation dynamics were observed in both primary and secondary nonviral antigen stimulations.
Article
Thermodynamics
Cameron R. Quick, Phillip Dumitraschkewitz, Juergen E. K. Schawe, Stefan Pogatscher
Summary: The impact of cooling rates on the apparent specific heat capacity of AlSi12 alloy during heating process was investigated using Fast Differential Scanning Calorimetry. The study revealed that the apparent specific heat capacity of AlSi12 alloy decreases after rapid cooling when heated above 400℃, which is highly relevant in metal additive manufacturing.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Agronomy
Gwonjeong Bok, Seungyong Hahm, Juhyung Shin, Jongseok Park
Summary: This study determines the optimal temperature difference in day-night indoor cultivation conditions to enhance flower yield and functional component contents of female hemp plants. The findings indicate that a positive 6 degree temperature difference (27:21 degrees C) is the optimal condition for female hemp flower production in limited space. These results contribute to advancements in indoor crop cultivation technology.
Article
Geochemistry & Geophysics
Miguel Bernecker, Sven Hofmann, Philip Tauxe Staudigel, Amelia Jane Davies, Mattia Tagliavento, Niels Meijer, Armelle Ballian, Jens Fiebig
Summary: The analysis of CO2 released from phosphoric acid digestion of carbonates can help identify the rate-limiting kinetic processes involved in carbonate mineralization and determine the formation temperatures. A robust methodology for high-precision triple clumped isotope analysis using gas and carbonate preparation lines and mass spectrometry is outlined. The stability of mass spectrometric measurements can be monitored using reference gas intensity.
Article
Infectious Diseases
Yaniv Lustig, Neta Zuckerman, Ital Nemet, Nofar Atari, Limor Kliker, Gili Regev-Yochay, Einav Sapir, Orna Mor, Sharon Alroy-Preis, Ella Mendelson, Michal Mandelboim
Summary: The study found that healthcare workers vaccinated with Comirnaty showed reduced neutralising titres against the Gamma, Beta, and Delta variants, but the remaining neutralisation capacity may still be protective.
Article
Mathematics, Applied
Xueru Wang, Junyi Zhu, Zhijun Qiao
Summary: This paper investigates the differential-difference Kadomtsev-Petviashvili equation and its initial value problem, obtaining solutions and new type rational solutions through the dressing method and quasi-local partial derivative-problem.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Ashish Kumar Karmaker, Krishneel Prakash, Md Nazrul Islam Siddique, Md Alamgir Hossain, Hemanshu Pota
Summary: This article explores the challenges and innovative solutions for electric vehicle hosting capacity analysis in distribution networks. The study highlights the importance of multiple performance constraints, scenarios, data availability, and methods in hosting capacity analysis. It provides insights into the technical aspects, performance, and practicality issues of open-source and commercial tools for hosting capacity assessment. The article also emphasizes the significance of region-specific integration capacity analysis due to diverse electric vehicle profiles, charging facilities, and network topologies. Promising solutions for enhancing hosting capacity include active network management, flexible operating limits, demand response, optimal placement methods, and network reconfiguration. The article concludes by discussing future research scopes for accurate and efficient EV hosting capacity analysis.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Mathematics, Applied
Vicente J. Bevia, Juan C. Cortes, Marc Jornet, Rafael J. Villanueva
Summary: In this study, a pathwise solution to a general scalar random differential equation with state-dependent Dirac-delta impulse terms at specific time instants is rigorously constructed. Additionally, the first probability density function of the solution is obtained by combining the Liouville-Gibbs equation and the Random Variable Transformation technique. The theoretical findings are further illustrated through computational simulations on two widely-used stochastic models in mathematical modeling.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Chemical
Kaixin Lv, Hongmei Liu, Xuedong Liu, Youheng Zhou, Wei Jiang, Weiwen Zheng, Honghong Zhang, Hui Chen, Ke Shao, Zhiqiang Xu
Summary: The drying characteristics of sludge in a uniaxial vacuum disc dryer were studied numerically in this research. The drying process of sludge was found to consist of three stages: the viscous stage, the sticky stage, and the granular stage. The influence of main parameters such as sludge feeding rate, heat source temperature, and rotating speed of the shaft on the drying process was analyzed. To optimize the drying efficiency, a differential push-flow structure was proposed, which provides different propulsion effects for the sludge in different drying stages. The dryer with the optimized structure showed improved performance compared to the original dryer.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Kun Zhang, Zhiqiang Liu, Xiaojuan Zhang, Qing Li, Andrew Jensen, Wen Tan, Ling Huang, Yangjun Wang, Joost de Gouw, Li Li
Summary: This study investigated ozone and its precursors in Chinese urban areas during the COVID-19 lockdown period, finding that while the emissions of ozone precursors decreased, the photochemical formation of ozone was stronger, leading to a significant increase in ozone concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)